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JINDALEE LITHIUM LIMITED — Capital/Financing Update 2021
Apr 7, 2021
65162_rns_2021-04-07_9ed76e84-8bb9-42e6-bd04-230756267ba3.pdf
Capital/Financing Update
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ASX RELEASE 8 APRIL 2021 ASX: JRL
UPGRADED MINERAL RESOURCE CONFIRMS McDERMITT AS THE LARGEST LITHIUM DEPOSIT IN THE USA
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Combined Indicated and Inferred Mineral Resource Inventory of 1.43 Billion tonnes at 1,320ppm Li for total of 10.1 Million tonnes Lithium Carbonate Equivalent (LCE) at 1,000 ppm cut-off grade (COG)
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At 10.1Mt LCE McDermitt is now the largest lithium deposit in the US by contained lithium in Mineral Resource[1]
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The deposit remains open with an Exploration Target Range (ETR) between 1.3 to 2.3 Billion tonnes at 1,100 to 1,500 ppm Li
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Jindalee is well funded to advance the development of the McDermitt Project with additional drilling, mining and metallurgical studies planned
Note that the potential quantity and grade of the Exploration Target is conceptual in nature, there has been insufficient exploration to estimate a Mineral Resource and it is uncertain if further exploration will result in the estimation of a Mineral Resource.
Jindalee Resources Limited ( Jindalee , the Company ) is pleased to announce the updated Mineral Resource Estimate (MRE) at the Company’s 100% owned McDermitt Lithium Project (US) ( McDermitt ) following the completion of drilling in December 2020[9] .
McDermitt now hosts a combined Indicated and Inferred Mineral Resource Inventory of 1.43 Billion tonnes at 1,320ppm Li for total of 10.1 Million tonnes Lithium Carbonate Equivalent (LCE) at 1,000 ppm Li COG, making it the largest lithium deposit in the United States by contained lithium in Mineral Resource , eclipsing Lithium Americas’ (TSX: LAC) Thacker Pass deposit (8.3Mt LCE at 2,000ppm Li COG)[1] .
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| Cut-off Grade (ppm Li) |
Indicated Resource | Indicated Resource | Indicated Resource | Inferred Resource | Inferred Resource | Inferred Resource | Indicated & Inferred Resource | Indicated & Inferred Resource | Indicated & Inferred Resource |
|---|---|---|---|---|---|---|---|---|---|
| Tonnage (Mt) |
Li Grade (ppm) |
LCE (Mt) |
Tonnage (Mt) |
Li Grade (ppm) |
LCE (Mt) |
Tonnage (Mt) |
Li Grade (ppm) |
LCE (Mt) |
|
| 500 | 283 | 1,340 | 2.0 | 2,020 | 1,130 | 12.1 | 2,300 | 1,150 | 14.1 |
| 1,000 | 233 | 1,430 | 1.8 | 1,200 | 1,300 | 8.3 | 1,430 | 1,320 | 10.1 |
| 1,500 | 73 | 1,910 | 0.7 | 240 | 1,750 | 2.2 | 313 | 1,790 | 3.0 |
| 1,750 | 44 | 2,110 | 0.5 | 85 | 2,000 | 0.9 | 129 | 2,040 | 1.4 |
| 2,000 | 23 | 2,310 | 0.3 | 34 | 2,200 | 0.4 | 57 | 2,240 | 0.7 |
Table 1 – Summary of McDermitt Mineral Resource Estimate at varying cut-off grades, with preferred reporting cut-off of 1,000ppm highlighted. Note: totals may vary due to rounding.
The cut-off grade for reporting of the Mineral Resource has reduced from 1,750ppm in 2019[3] to 1,000ppm in 2021 due to the encouraging results received from metallurgical test work completed by Jindalee over the past 18 months[2,4,7 ] which demonstrated the ore can be beneficiated before leaching. This significantly increases confidence in the ability to reduce operating costs which impacts directly and positively upon the reasonable prospects for eventual economic extraction (as per JORC Code 2012). The results of the MRE (Table 1) and ETR (Table 2) at a full range of cut-off grades demonstrate the scalability of the project.
| Cut-off Grade (ppm Li) |
Exploration Target Range | Exploration Target Range | Exploration Target Range | Exploration Target Range |
|---|---|---|---|---|
| Lower Limit (Mt) |
Upper Limit (Mt) |
Lower Grade (ppm Li) |
Upper Grade (ppm Li) |
|
| 500 | 2,300 | 4,500 | 800 | 1,200 |
| 1,000 | 1,300 | 2,300 | 1,100 | 1,500 |
| 1,500 | 270 | 390 | 1,500 | 1,900 |
| 1,750 | 100 | 140 | 1,700 | 2,100 |
| 2,000 | 30 | 40 | 1,900 | 2,300 |
Table 2 – Summary of McDermitt Exploration Target Range at varying cut-off grades, with preferred reporting cut-off of 1,000ppm highlighted. Note: totals may vary due to rounding.
Recent infill drilling[6,8,9] has increased confidence in geological and grade continuity through the centre of the deposit, allowing conversion of part of the existing Inferred Mineral Resource to Indicated (Figure 1). Furthermore, there is significant scope for resource extensions of the deposit to the west and south in Jindalee’s new claims[11] , as well as infill drilling of the Inferred material.
The results from the 2021 Mineral Resource update and the material uplift in contained lithium reinforces the significance of the McDermitt project as a potential source of future supply to the rapidly growing US battery manufacturing industry. Jindalee intends to continue de-risking the project through further metallurgical studies aimed at the downstream processing flowsheet ahead of a potential Scoping Study in the June quarter of 2021.
The 2021 drill program will be finalised based on the updated MRE with the aim to infill and further upgrade the Resource and to define the full extent of the lithium mineralisation at McDermitt. Applications for drill permitting are expected to be submitted in April 2021.
A full summary of all drill hole data included in the MRE is in Annexure A.
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Figure 1 – Plan view of the McDermitt Lithium Project with drill hole collars, updated Mineral Resource and ETR outlines (at plane 1523mRL), and new claim boundaries[11] .
Mineral Resource and Exploration Target Methodology
Jindalee commissioned H&S Consultants Pty Ltd (H&SC) to update the Mineral Resource Estimate (MRE) following the completion of the 2020 drill program. The MRE is based on all available information as of 31 March 2021.
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Mineralisation and Geology
Lithium mineralisation occurs within a sequence of flat-lying, paleo-lake sediments that overlie a volcanic (basalt) basement within the Tertiary aged McDermitt Caldera. The maximum drill hole intersection of mineralised sediments is now 179.8 m and averages 131.7 m in holes where the basalt basement was intersected. The mineralisation appears to have a strong stratigraphic control with no obvious faulting or folding identified to date. A typical cross section demonstrating relationship between grade and geology is shown in Figure 2.
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Figure 2 – Schematic section showing recent significant intercepts through the McDermitt Project.
Drilling and Sampling Techniques
A total of 29 drillholes (16 Reverse Circulation (RC) and 13 Diamond) were used in the estimation. Diamond drill core was collected as HQ triple tube and quarter cut for assaying whilst RC drill samples were either riffle split (dry) or rotary split (wet) on site. All samples were submitted to ALS for assaying via 4 acid digest of 0.25g sample split with a 48 element ICP-MS finish.
Qualitative lithological descriptions (colour, weathering, grain size, lithology, mineralogy, veining textures and other significant features) were recorded by the field geologist for both diamond and RC programs.
Density
No new density measurements were taken in 2020 as all holes were drilled as RC. Specific Gravity (SG) was assigned to the model through the formula:
"�� = 1.4134 + ����ℎ ∗0.0012"
At a 1000ppm cut-off, the average assigned specific gravity is 1.53.
Estimation
Wireframe surfaces were generated for the top and bottom of the paleo-lake sediments and used to constrain the estimate into three domains (sediments, colluvium, and basement).
Sample data were composited to 2m for analysis and grade estimate as this is the dominant sample length. There were no extreme values present in statistical data analysis so no treatment for outliers was required.
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Lithium was estimated using Ordinary Kriging (OK) for all domains. Variogram modelling indicating mineralisation may be trending NW-SE direction which corresponds to drainage in the claim area. Block size for estimation was 200mE by 200mN by 5mRL with sub-celling permitted to 40mE by 40mN by 1mRL.
Validation
The model was validated in several ways including visual comparison of block and drill hole grades, statistical analysis, examination of grade tonnage data and comparison with previous model. No material issues were identified.
A comparison of the grade versus tonnage curve for the 2019 MRE and the 2021 MRE is demonstrated in Figure 3. At the previous reporting COG of 1,750ppm Li, there is a small decrease in total tonnes, and a slight increase in grade for an overall drop in contained metal of approximately 15%. This may be a result of the different drilling methods employed from the 2019 MRE (diamond) to the 2021 MRE (RC) with twinned holes planned for 2021 to address any bias concerns.
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Figure 3 – Grade Tonnage comparison between 2019[1] and 2021 Mineral Resource models.
Classification
Mineral Resources were classified based on consideration of data quality and spacing as well as geological and grade continuity. Indicated Mineral Resources are confined to an area of closer spaced drilling with holes nominally drilled 400m apart, while Inferred Mineral Resources were restricted to blocks within 1,000m of the nearest hole. All Mineral Resources are within 100m of surface, with at least 3 holes and 12 samples required to inform these blocks.
The lower end of the Exploration Target range is defined by a horizontal search radius of 3,000 m while the upper end is defined by a 6,000 m horizontal search radius. No depth restriction was imposed and at least 2 holes and 8 samples were required to inform these blocks; maximum depth of the Exploration Target is ~250 m below surface. Grade ranges are the estimated grades +/200ppm Li. The Exploration Target now includes a small proportion of colluvium material overlying the mineralised lake sediments with no material with significant grade in the basement basalts.
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Metallurgy
Since the completion of the maiden Mineral Resource in 2019, Jindalee has completed several metallurgical studies focussing on beneficiation and sulphuric acid leaching at Hazen Research labs.
Results from leach testwork undertaken on bulk (non-beneficiated) samples in 2019 indicated lithium recoveries of >95% with short residence times using sulphuric acid (H2SO4) leach at moderate temperatures and atmospheric pressure, with potential to reduce acid consumption via recycling of the leachate[2] .
In August 2020 Jindalee announced that beneficiation of McDermitt ore via attrition scrubbing at 20% solids had increased the lithium content in the <0.01mm fraction by more than 50% (from 0.22% to 0.34%) and had reduced carbonate and analcime (both acid consuming minerals)[4] .
The latest attrition scrubbing testwork, designed to produce a beneficiated sample for leaching experiments, increased the lithium content in the <0.01mm fraction by 60.9% (from 0.23% to 0.37%)[7] . Furthermore, initial leaching experiments on beneficiated samples demonstrated lithium extraction rates of 94-97% with 26% less acid consumed per lithium unit than for previous similar experiments on non-beneficiated ore. The testwork also indicated that the residue remaining after leaching is relatively benign, comprising quartz, feldspar and gypsum.
Reporting Cut-off Grade
Mineral Resources were previously reported at a 1,750 ppm Li cut-off grade. However Mineral Resources are now reported at a 1,000 ppm Li cut-off grade because recent metallurgical testwork has shown that beneficiation of McDermitt ore by attrition scrubbing can increase the lithium content by up to 60%[7] . This is anticipated to positively impact on operating costs through mass reduction of the ore before processing and decreased acid consumption during leaching. These results indicate that significant lower grade material than initially anticipated can now be processed.
All other details pertaining to the reporting of exploration results and Mineral Resources are detailed in Annexure B.
Authorised for release by the Board of Jindalee Resources Limited.
For further information please contact:
LINDSAY DUDFIELD Executive Director T: + 61 8 9321 7550 E: [email protected]
KAREN WELLMAN Chief Executive Officer T: + 61 8 9321 7550 E: [email protected]
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About Jindalee
Jindalee Resources Limited (ASX: JRL) is an exploration company with direct and indirect exposure to lithium, gold, base and strategic metals, iron ore, uranium and magnesite through projects generated by the Company’s technical team. Jindalee has a track record of rewarding shareholders, including priority entitlements to several successful IPO’s and payment of a special dividend.
Jindalee’s strategy is to acquire prospective ground, add value through low-cost exploration and, where appropriate, either introduce partners to assist in funding further progress, or fund this activity via a dedicated company in which Jindalee retains a significant interest.
Following the capital raising completed in March 2021 Jindalee held cash and marketable securities worth approximately $12.0M[10] , which combined with the Company’s tight capital structure (only 51.3M shares on issue), provides a strong base for advancing projects currently held by Jindalee and leveraging into new opportunities.
References:
Additional details including JORC 2012 reporting tables, where applicable, can be found in the following releases lodged with ASX or similar and referred to in this announcement:
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Lithium Americas TSX Announcement 02/08/2018: “Lithium Americas Files Technical Report for the Thacker Pass PreFeasibility Study” Accessed via https://money.tmx.com/en/quote/LAC. The comparison is based on published Mineral Resources only. Lithium Americas’ Thacker Pass Project hosts Proven and Probable Mineral Reserves in addition to Measured, Indicated and Inferred Mineral Resources. The Thacker Pass Mineral Resource is reported at 2,000ppm COG.
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Jindalee Resources ASX announcement 19/07/2019: “Further Positive Metallurgical Test Results from McDermitt”.
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Jindalee Resources ASX announcement 19/11/2019: “Maiden Lithium Resource at McDermitt”.
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Jindalee Resources ASX announcement 17/08/2020: “More Metallurgical Test Results from McDermitt”.
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Jindalee Resources ASX announcement 14/12/2020: “McDermitt Lithium Project – Drilling Update”.
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Jindalee Resources ASX Announcement 01/02/2021: “McDermitt Lithium Project – First Assay Results”.
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Jindalee Resources ASX Announcement 22/02/2021: “More positive metallurgical results from McDermitt”.
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Jindalee Resources ASX Announcement 05/03/2021: “Results Confirm Extension to McDermitt Resource”.
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Jindalee Resources ASX Announcement 12/03/2021: “JRL continues to demonstrate strategic scale of McDermitt”. 10. Jindalee Resources ASX Announcement 15/03/2021: “$9M Raising to fund Resource Growth hat McDermitt”.
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Jindalee Resources ASX Announcement 25/03/2021: “Jindalee increases size of McDermitt Project by 67%”
Competent Persons Statement
The information in this report that relates to Exploration Results and the data that underpins the Exploration Targets and Mineral Resources is based on information compiled by Mr Lindsay Dudfield and Mrs Karen Wellman. Mr Dudfield is consultant to the Company and a Member of the Australasian Institute of Mining and Metallurgy and the Australian Institute of Geoscientists. Mrs Wellman is an employee of the Company and a Member of the Australasian Institute of Mining and Metallurgy. Both Mr Dudfield and Mrs Wellman have sufficient experience relevant to the styles of mineralisation and types of deposits under consideration, and to the activity being undertaken, to qualify as Competent Persons as defined in the 2012 Edition of the ‘Australasian Code for Reporting of Exploration Results, Minerals Resources and Ore Reserves.’ Mr Dudfield and Mrs Wellman consent to the inclusion in this report of the matters based on this information in the form and context in which it appears.
The information in this report that relates to the Exploration Targets and the Mineral Resource Estimates for the McDermitt deposit is based on information compiled by Mr. Arnold van der Heyden, who is a Member and Chartered Professional (Geology) of the Australasian Institute of Mining and Metallurgy and a Director of H&S Consultants Pty Ltd. Mr. van der Heyden has sufficient experience relevant to the style of mineralisation and type of deposit under consideration and to the activity being undertaken to qualify as a Competent Person as defined in the 2012 Edition of the ‘Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves’ (JORC Code). Mr van der Heyden consents to the inclusion in this report of the matters based on this information in the form and context in which it appears.
Forward-Looking Statements
This document may contain certain forward-looking statements. Forward-looking statements include but are not limited to statements concerning Jindalee Resources Limited’s (Jindalee’s) current expectations, estimates and projections about the industry in which Jindalee operates, and beliefs and assumptions regarding Jindalee’s future performance. When used in this document, the words such as “anticipate”, “could”, “plan”, “estimate”, “expects”, “seeks”, “intends”, “may”, “potential”, “should”, and similar expressions are forward-looking statements. Although Jindalee believes that its expectations reflected in these forward-looking statements are reasonable, such statements are subject to known and unknown risks, uncertainties and other factors, some of which are beyond the control of Jindalee and no assurance can be given that actual results will be consistent with these forward-looking statements.
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Annexure A:
Drill hole summary table with significant intersections for all drilling completed at McDermitt
| Hole ID | Hole **Type ** |
Easting | Northing | RL | Dip/Azi | End of Hole Depth |
Metres From | Metres To | Width (m) |
Li (ppm) |
|---|---|---|---|---|---|---|---|---|---|---|
| MDD001 | DDH | 412208 | 4651743 | 1582 | -89/36 | 92.36 | 12 | 26 | 14 | 1527 |
| 48 | 60 | 12 | 1825 | |||||||
| MDD002 | DDH | 412071 | 4653292 | 1574 | -90/0 | 90.83 | 2 | 22 | 20 | 1420 |
| 38 | 54 | 16 | 1910 | |||||||
| 66 | 90.8 | 24.8 | 1238 | |||||||
| MDD003 | DDH | 412467 | 4654722 | 1617 | -89/179 | 91.47 | 4 | 18 | 14 | 1031 |
| 24 | 38 | 14 | 1202 | |||||||
| 44 | 74 | 30 | 1884 | |||||||
| MDD004 | DDH | 413673 | 4653031 | 1588 | -90/0 | 82.91 | 2.5 | 18 | 15.5 | 1185 |
| 28 | 82 | 54 | 1659 | |||||||
| MDD005 | DDH | 413530 | 4652422 | 1535 | -89/290 | 93.57 | 5.5 | 52 | 46.5 | 1027 |
| 66 | 80 | 14 | 1651 | |||||||
| MDD006 | DDH | 413112 | 4653999 | 1602 | -90/0 | 165.8 | 4.3 | 20 | 15.7 | 1258 |
| 28 | 58 | 30 | 1967 | |||||||
| 70 | 144 | 74 | 1481 | |||||||
| MDD007 | DDH | 412967 | 4653152 | 1577 | -90/0 | 122.83 | 6 | 26 | 20 | 1419 |
| 36 | 54 | 18 | 1516 | |||||||
| 72 | 110 | 38 | 1496 | |||||||
| MDD008 | DDH | 413504 | 4654470 | 1579 | -88/183 | 108.5 | 6.6 | 22 | 15.4 | 1233 |
| 36 | 90 | 54 | 1773 | |||||||
| MDD009 | DDH | 413791 | 4654812 | 1561 | -88/291 | 80.16 | 2.2 | 6 | 3.8 | 1319 |
| 12 | 58 | 46 | 1674 | |||||||
| MDD010 | DDH | 412341 | 4655866 | 1612 | -89/218 | 91.44 | 12 | 18 | 6 | 1567 |
| 30 | 36 | 6 | 1233 | |||||||
| 48 | 88 | 40 | 1922 |
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| Hole ID | Hole Type |
Easting | Northing | RL | Dip/Azi | End of Hole Depth |
Metres From | Metres To | Width (m) |
Li (ppm) |
|---|---|---|---|---|---|---|---|---|---|---|
| MDD011 | DDH | 410790 | 4652579 | 1625 | -90/0 | 208.07 | 32 | 54 | 22 | 1498 |
| 60 | 78 | 18 | 1653 | |||||||
| 96 | 112 | 16 | 1635 | |||||||
| 120 | 170 | 50 | 1640 | |||||||
| MDD012 | DDH | 412383 | 4654089 | 1560 | -88/329 | 120.39 | 8.31 | 26 | 17.7 | 1498 |
| 40 | 76 | 36 | 2141 | |||||||
| MDD013 | DDH | 411473 | 4653055 | 1597 | -89/295 | 167.33 | 2 | 32 | 30 | 1245 |
| 42 | 60 | 18 | 1478 | |||||||
| 76 | 98 | 22 | 1404 | |||||||
| 110 | 150 | 40 | 1556 | |||||||
| MDRC001 | RC | 413530 | 4652424 | 1535 | -90/0 | 152.39 | 29 | 51.8 | 22.8 | 1070 |
| 67.1 | 79.3 | 12.2 | 1600 | |||||||
| 85.3 | 118.9 | 33.6 | 1378 | |||||||
| MDRC002 | RC | 414891 | 4654160 | 1576 | -90/0 | 91.4 | 0 | 9.2 | 9.2 | 1440 |
| 15.3 | 32 | 16.8 | 1412 | |||||||
| 36.6 | 44.2 | 7.6 | 1416 | |||||||
| MDRC003 | RC | 413058 | 4655552 | 1583 | -90/0 | 137.2 | 1.5 | 18.3 | 16.8 | 1731 |
| 24.4 | 39.7 | 15.3 | 1054 | |||||||
| 48.8 | 67.1 | 18.3 | 1415 | |||||||
| MDRC004 | RC | 411805 | 4656684 | 1647 | -90/0 | 185.9 | 96.1 | 103.7 | 7.6 | 1130 |
| 140.3 | 149.5 | 9.2 | 2243 | |||||||
| 155.6 | 170.8 | 15.3 | 2459 | |||||||
| MDRC005 | RC | 412117 | 4655128 | 1612 | -90/0 | 161.5 | 18.3 | 27.5 | 9.2 | 1157 |
| 58 | 76.3 | 18.3 | 1992 | |||||||
| 82.4 | 131.2 | 48.8 | 1342 |
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| Hole ID | Hole Type |
Easting | Northing | RL | Dip/Azi | End of Hole Depth |
Metres From | Metres To | Width (m) |
Li (ppm) |
|---|---|---|---|---|---|---|---|---|---|---|
| MDRC006 | RC | 412927 | 4654456 | 1609 | -90/0 | 173.7 | 39.7 | 70.2 | 30.5 | 1939 |
| 74.7 | 94.6 | 19.8 | 1151 | |||||||
| 97.6 | 126.6 | 29 | 2164 | |||||||
| MDRC007 | RC | 413420 | 4653407 | 1585 | -90/0 | 164.6 | 1.5 | 9.2 | 7.6 | 1380 |
| 19.8 | 48.8 | 29 | 1948 | |||||||
| 62.5 | 79.3 | 16.8 | 1147 | |||||||
| 99.1 | 134.2 | 35.1 | 1309 | |||||||
| MDRC008 | RC | 413918 | 4652733 | 1570 | -90/0 | 146.3 | 13.7 | 39.7 | 25.9 | 1794 |
| 53.4 | 70.2 | 16.8 | 1274 | |||||||
| 96.1 | 115.9 | 19.8 | 1186 | |||||||
| 120.5 | 128.1 | 7.6 | 1379 | |||||||
| MDRC009 | RC | 413552 | 4653960 | 1583 | -90/0 | 158.5 | 6.1 | 29 | 22.9 | 2108 |
| 38.1 | 82.4 | 44.2 | 1405 | |||||||
| 93 | 103.7 | 10.7 | 1984 | |||||||
| 108.3 | 117.4 | 9.2 | 1233 | |||||||
| MDRC010 | RC | 413756 | 4653605 | 1576 | -90/0 | 146.3 | 0 | 19.8 | 19.8 | 2383 |
| 33.6 | 65.6 | 32 | 1397 | |||||||
| 71.7 | 114.4 | 42.7 | 1402 | |||||||
| MDRC011 | RC | 413961 | 4653342 | 1579 | -90/0 | 137.2 | 3.1 | 25.9 | 22.9 | 2283 |
| 33.6 | 68.6 | 35.1 | 1373 | |||||||
| 85.4 | 119 | 33.6 | 1425 | |||||||
| MDRC012 | RC | 414254 | 4652960 | 1573 | -90/0 | 134.1 | 1.5 | 59.5 | 58 | 1611 |
| 88.5 | 115.9 | 27.4 | 1477 | |||||||
| MDRC013 | RC | 413224 | 4652757 | 1542 | -90/0 | 121.9 | 32 | 45.8 | 13.8 | 1073 |
| 70.2 | 102.2 | 32 | 1379 | |||||||
| 58 | 64.1 | 6.1 | 1572 |
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| Hole ID | Hole Type |
Easting | Northing | RL | Dip/Azi | End of Hole Depth |
Metres From | Metres To | Width (m) |
Li (ppm) |
|---|---|---|---|---|---|---|---|---|---|---|
| MDRC014 | RC | 411864 | 4653865 | 1618 | -90/0 | 182.9 | 12.2 | 82.4 | 70.2 | 1221 |
| 91.5 | 106.8 | 15.3 | 1578 | |||||||
| MDRC015 | RC | 131.2 | 155.6 | 24.4 | 1887 | |||||
| 410845 | 4654548 | 1652 | -90/0 | 182.9 | 47.3 | 62.5 | 15.3 | 1233 | ||
| 73.2 | 83.9 | 10.7 | 1189 | |||||||
| 120.5 | 146.4 | 25.9 | 1615 | |||||||
| MDRC016 | RC | 411516 | 4652079 | 1618 | -90/0 | 182.9 | 27.5 | 45.8 | 18.3 | 1228 |
| 56.4 | 71.7 | 15.3 | 1554 | |||||||
| 91.5 | 103.7 | 12.2 | 1647 | |||||||
| 122 | 178.4 | 56.4 | 1151 |
Notes to Annexure A:
-
All coordinates are NAD27 Z11
-
RC intervals are reported on 1000ppm Li cut-off with maximum internal dilution of 10 feet (3.05m).
-
Diamond drilling intervals are reporting on 1000ppm Li cut-off with maximum internal dilution of 4.0m.
-
Intervals reported in this table meet a minimum downhole width of approximately 20 feet (6.1m).
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Annexure B: JORC Code, 2012 Edition – Table 1 Section 1 Sampling Techniques and Data
| Criteria | JORC Code explanation | Commentary |
|---|---|---|
| Sampling | Nature and quality of sampling (eg cut channels, random chips, or | Reverse Circulation (RC) |
| techniques | specific specialised industry standard measurement tools appropriate | RC drilling was used to collect samples at 5 foot (~1.52m) intervals. |
| to the minerals under investigation, such as down hole gamma | Approximately 2-4kg was collected from each interval using a riffle | |
| sondes, or handheld XRF instruments, etc). These examples should | splitter (for dry samples) and a rotary splitter (for wet samples). | |
| not be taken as limiting the broad meaning of sampling. | All samples were placed into individually labelled, consecutively | |
| Include reference to measures taken to ensure sample representivity | numbered sample bags. | |
| and the appropriate calibration of any measurement tools or systems | The RC samples obtained are considered representative of the | |
| used. | material drilled. | |
| Aspects of the determination of mineralisation that are Material to the | Diamond drilling | |
| Public Report. | Diamond core was collected in HQ triple tube (HQ3 63.5mm) | |
| In cases where ‘industry standard’ work has been done this would be | diameter core. | |
| relatively simple (eg ‘reverse circulation drilling was used to obtain 1 | Core was cut and quarter core sampled on 2m intervals or lithological | |
| m samples from which 3 kg was pulverised to produce a 30 g charge | boundaries. | |
| for fire assay’). In other cases more explanation may be required, | Colluvium/overburden was not sampled | |
| such as where there is coarse gold that has inherent sampling problems. Unusual commodities or mineralisation types (eg submarine nodules) may warrant disclosure of detailed information. |
All samples were placed into individually labelled, consecutively numbered sample bags. |
|
| Drilling | Drill type (eg core, reverse circulation, open-hole hammer, rotary air | Reverse Circulation |
| techniques | blast, auger, Bangka, sonic, etc) and details (eg core diameter, triple | RC drilling was completed using a conventional hammer, 2-slot |
| or standard tube, depth of diamond tails, face-sampling bit or other | interchange and 4.75 inch bit. | |
| type, whether core is oriented and if so, by what method, etc). | Water injection was generally used after setting 10’ – 20’ of casing | |
| (~6.1m) with holes drilled wet thereafter. | ||
| Holes were drilled vertically using 10 foot (3.05m) rods | ||
| Diamond | ||
| Diamond drilling was used to collect HQ3 (63.5mm) diameter core. | ||
| Core holes were drilled vertically, and core was not oriented | ||
| Drill sample | Method of recording and assessing core and chip sample recoveries | Reverse Circulation |
| recovery | and results assessed. | Water inflows were encountered in most holes which may have |
| Measures taken to maximise sample recovery and ensure | caused loss of fine (clay) fraction from some intervals, thereby | |
| representative nature of the samples. | underestimatinglithiumgrade(previous metallurgical testwork has |
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| Criteria | JORC Code explanation | JORC Code explanation | Commentary |
|---|---|---|---|
| | Whether a relationship exists between sample recovery and grade | indicated that ~80% of the lithium is in the -10-micron fraction). | |
| and whether sample bias may have occurred due to preferential | Two methods will be used to quantify the potential understatement of | ||
| loss/gain of fine/coarse material. | lithium grades in RC drilling. First the results from assaying of bulk | ||
| samples taken for metallurgy will be compared to the drill hole | |||
| sample. Secondly the Company proposes to twin several of the RC | |||
| holes with diamond core drilling in future drill programs | |||
| Diamond | |||
| Core blocks inserted by the drilling company indicated the length of a | |||
| run and the amount of recovered core in feet. The site geologist | |||
| converted this to metres and core recovery was recorded on the | |||
| sampling sheet. Core recovery was the primary focus for the drill | |||
| contractor and was typically >90% in the zones of interest. | |||
| Core recovery was recorded by the site geologist, and 1m downhole | |||
| depths marked prior to geological logging and sampling | |||
| No relationship between recovery and grade was observed. | |||
| Logging | | Whether core and chip samples have been geologically and | Qualitative lithological descriptions (colour, weathering, grain size, |
| geotechnically logged to a level of detail to support appropriate | lithology, mineralogy, veining textures and other significant features) | ||
| Mineral Resource estimation, mining studies and metallurgical | were recorded by the field geologist. | ||
| studies. | Representative samples of bedrock were collected from each 5 foot | ||
| | Whether logging is qualitative or quantitative in nature. Core (or | interval of every RC hole and were retained in labelled sample chip | |
| costean, channel, etc) photography. | trays, with chip trays photographed on completion of each hole. | ||
| | The total length and percentage of the relevant intersections logged. | Photos (wet and dry) were taken of all core trays for later review. | |
| Sub-sampling | |
If core, whether cut or sawn and whether quarter, half or all core | RC samples were split in the field (riffle split if dry; rotary split if wet) |
| techniques | taken. | and collected in pre-numbered calico bags. | |
| and sample | | If non-core, whether riffled, tube sampled, rotary split, etc and | Diamond core was cut and quarter core sampled. |
| preparation | whether sampled wet or dry. | Sample preparation at the laboratory involved crushing to 70% less | |
| | For all sample types, the nature, quality and appropriateness of the | than 2mm, riffle split off 250g, pulverize split to better than 85% | |
| sample preparation technique. | passing 75 microns. | ||
| | Quality control procedures adopted for all sub-sampling stages to | Duplicate samples were inserted approximately every 15 samples to | |
| maximise representivity of samples. | check the representivity of samples and precision in assaying. | ||
| | Measures taken to ensure that the sampling is representative of the in | ||
| situ material collected, including for instance results for field | |||
| duplicate/second-half sampling. | |||
| | Whether sample sizes are appropriate to thegrain size of the material |
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| Criteria | JORC Code explanation | JORC Code explanation | Commentary |
|---|---|---|---|
| being sampled. | |||
| Quality of | | The nature, quality and appropriateness of the assaying and | Samples were assayed by ALS Laboratories in Reno Nevada via 4 |
| assay data | laboratory procedures used and whether the technique is considered | acid digest of 0.25g sample split with a 48 element ICP-MS finish. | |
| and | partial or total. | 4 Acid digests are considered to approach a total digest, as some | |
| laboratory | | For geophysical tools, spectrometers, handheld XRF instruments, etc, | refractory minerals are not attacked. |
| tests | the parameters used in determining the analysis including instrument | Certified lithium sediment standards were inserted approximately | |
| make and model, reading times, calibrations factors applied and their | every 15 samples | ||
| derivation, etc. | Blank samples were inserted approximately every 15 samples to | ||
| | Nature of quality control procedures adopted (eg standards, blanks, | check for laboratory contamination. | |
| duplicates, external laboratory checks) and whether acceptable levels | Duplicates were taken approximately 1 in every 15 samples |
||
| of accuracy (ie lack of bias) and precision have been established. | All standards, blanks and duplicate data are reviewed as assays are | ||
| received. Any QAQC data that fails to meet acceptable confidence | |||
| limits set by Jindalee are followed up with the laboratory as an action | |||
| item. | |||
| Laboratory QAQC involves the use of internal lab standards, splits | |||
| and replicates as part of in-house procedures. ALS Laboratories | |||
| participates in external umpire assessments to maintain high levels of | |||
| QAQC in relation to their peers. | |||
| Verification of | |
The verification of significant intersections by either independent or | Assay results were verified by more than one Jindalee geologist. |
| sampling and | alternative company personnel. | Data is received and stored electronically with a comparison between | |
| assaying | | The use of twinned holes. | the .pdf certificates and the .csv data files indicating no errors in |
| | Documentation of primary data, data entry procedures, data | transmission. | |
| verification, data storage (physical and electronic) protocols. | |||
| | Discuss any adjustment to assay data. | ||
| Location of | | Accuracy and quality of surveys used to locate drill holes (collar and | Sample locations were surveyed using a handheld Garmin GPS with |
| data points | down-hole surveys), trenches, mine workings and other locations | an accuracy of +/- 3m horizontally, and +/- 5m vertically; hole | |
| used in Mineral Resource estimation. | positions were also checked against a Digital Elevation Model (DEM). | ||
| | Specification of the grid system used. | Locations are reported in metres NAD27 Zone11. | |
| | Quality and adequacy of topographic control. | No downhole surveys were undertaken on RC drillholes | |
| Downhole surveys were undertaken on diamond drill holes at | |||
| approximately 30m (100’) intervals downhole including at the end of | |||
| hole. The typical variation from vertical observed was <1°, maximum | |||
| variation from vertical observed was 2.3°, with a survey accuracy of | |||
| +/- 0.1°. No downhole survey data was received for MDD007. |
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| Criteria | JORC Code explanation | Commentary |
|---|---|---|
| Data spacing | Data spacing for reporting of Exploration Results. | Diamond drill spacing is approximately 800m. |
| and | Whether the data spacing and distribution is sufficient to establish the | The RC drilling was designed to infill and extend an Inferred Mineral |
| distribution | degree of geological and grade continuity appropriate for the Mineral | Resource reported by the Company on 19 November 2019 based on |
| Resource and Ore Reserve estimation procedure(s) and | the diamond drilling. | |
| classifications applied. | Drill spacing and distribution is sufficient to establish the degree of | |
| Whether sample compositing has been applied. | geological and grade continuity appropriate for the Mineral Resource | |
| estimation and classification applied. | ||
| Orientation of | Whether the orientation of sampling achieves unbiased sampling of | Vertical drill holes were appropriate for assessing the flat lying units of |
| data in | possible structures and the extent to which this is known, considering | interest. Downhole lengths reported are therefore the same as true |
| relation to | the deposit type. | widths. |
| geological | If the relationship between the drilling orientation and the orientation | |
| structure | of key mineralised structures is considered to have introduced a | |
| sampling bias, this should be assessed and reported if material. | ||
| Sample | The measures taken to ensure sample security. | Samples were collected by qualified geological consultants engaged |
| security | by Jindalee and stored on site in locked sample storage bins provided | |
| by ALS Laboratories, who then collected the bins and transported | ||
| them to their facility in Reno, USA. | ||
| Audits or | The results of any audits or reviews of sampling techniques and data. | QAQC data is reviewed regularly with each returned assay batch and |
| reviews | reported on a per program basis. |
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Section 2 Reporting of Exploration Results
(Criteria listed in the preceding section also apply to this section.)
| Criteria | JORC Code explanation | Commentary | Commentary |
|---|---|---|---|
| Mineral | Type, reference name/number, location and ownership including | | Samples reported are all from land managed by the US Bureau of |
| tenement and | agreements or material issues with third parties such as joint |
Land Management, with the mineral rights held under placer claims | |
| land tenure | ventures, partnerships, overriding royalties, native title interests, | owned 100% by HiTech Minerals Inc., a wholly owned US based | |
| status | historical sites, wilderness or national park and environmental | subsidiary of Jindalee Resources Limited. | |
| settings. | | No joint ventures or royalty interests are applicable. | |
| The security of the tenure held at the time of reporting along with any | |||
| known impediments to obtaining a licence to operate in the area. | |||
| Exploration | Acknowledgment and appraisal of exploration by other parties. | | At McDermitt, historic uranium exploration by Chevron first identified |
| done by other | the presence of lithium. Lithium Americas Corp (TSX: LAC) is | ||
| parties | exploring the southern end of the McDermitt Caldera, approximately | ||
| 30km south of the Project area for lithium within geologically identical | |||
| stratigraphy. | |||
| Geology | Deposit type, geological setting and style of mineralisation. | | Lithium is hosted in flat-lying lacustrine sediments deposited within |
| the Tertiary aged McDermitt Caldera. | |||
| Drill hole | A summary of all information material to the understanding of the | | Please see table and figures in main body of text. |
| Information | exploration results including a tabulation of the following information | ||
| for all Material drill holes: | |||
| o easting and northing of the drill hole collar | |||
| o elevation or RL (Reduced Level – elevation above sea level in | |||
| metres) of the drill hole collar | |||
| o dip and azimuth of the hole | |||
| o down hole length and interception depth | |||
| o hole length. | |||
| If the exclusion of this information is justified on the basis that the | |||
| information is not Material and this exclusion does not detract from | |||
| the understanding of the report, the Competent Person should clearly | |||
| explain why this is the case. | |||
| Data | In reporting Exploration Results, weighting averaging techniques, | | Significant intercepts are presented as a simple average above a |
| aggregation | maximum and/or minimum grade truncations (eg cutting of high | 1000ppm Li cut-off, with a maximum of 10 feet (3.05m) internal | |
| methods | grades) and cut-off grades are usually Material and should be stated. | ‘waste’ (where ‘waste’ is defined as intervals with less than 1000ppm | |
| Where aggregate intercepts incorporate short lengths of high grade | Li). | ||
| results and longer lengths of lowgrade results, theprocedure used | | Lithiumcarbonate equivalent (‘LCE’)is calculated by taking theLi |
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| Criteria | JORC Code explanation | Commentary |
|---|---|---|
| for such aggregation should be stated and some typical examples of | value and multiplying by 5.323 to determine the molar equivalent in | |
| such aggregations should be shown in detail. | standard industry fashion | |
| The assumptions used for any reporting of metal equivalent values | ||
| should be clearly stated. | ||
| Relationship | These relationships are particularly important in the reporting of | Vertical drill holes were appropriate for assessing the flat lying units of |
| between | Exploration Results. | interest. Downhole lengths reported are therefore the same as true |
| mineralisation | If the geometry of the mineralisation with respect to the drill hole |
widths. |
| widths and | angle is known, its nature should be reported. | |
| intercept | If it is not known and only the down hole lengths are reported, there | |
| lengths | should be a clear statement to this effect (eg ‘down hole length, true | |
| _width not known’). _ | ||
| Diagrams | Appropriate maps and sections (with scales) and tabulations of | See main body of announcement. |
| intercepts should be included for any significant discovery being | ||
| reported These should include, but not be limited to a plan view of | ||
| drill hole collar locations and appropriate sectional views. | ||
| Balanced | Where comprehensive reporting of all Exploration Results is not | For RC drilling all results above a cut-off of 1000ppm lithium |
| reporting | practicable, representative reporting of both low and high grades | containing a maximum of 10 feet (3.05m) internal ‘waste’ (where |
| and/or widths should be practiced to avoid misleading reporting of | ‘waste’ is defined as intervals with less than 1000ppm Li) are | |
| Exploration Results. | regarded as significant and have been reported. | |
| For diamond drilling results above a cut-off of 1000ppm lithium | ||
| containing a maximum of 4m internal ‘waste’ (where ‘waste’ is defined | ||
| as intervals with less than 1000ppm Li) are regarded as significant | ||
| and have been reported. | ||
| Other | Other exploration data, if meaningful and material, should be reported | Metallurgical testwork (previously announced3,6) has indicated high |
| substantive | including (but not limited to): geological observations; geophysical | lithium recoveries from leaching with sulphuric acid at moderate |
| exploration | survey results; geochemical survey results; bulk samples – size and | temperature and atmospheric pressure and that the mineralised |
| data | method of treatment; metallurgical test results; bulk density, | material can be beneficiated using attrition scrubbing |
| groundwater, geotechnical and rock characteristics; potential | Also see main body of announcement. | |
| deleterious or contaminating substances. | ||
| Further work | The nature and scale of planned further work (eg tests for lateral | Additional work underway includes: |
| extensions or depth extensions or large-scale step-out drilling). | - Planning and permitting of next round of drilling to infill and |
|
| Diagrams clearly highlighting the areas of possible extensions, | extend the MRE | |
| including the main geological interpretations and future drilling areas, | - Ongoing metallurgical test work aimed at downstream processing |
|
| provided this information is not commercially sensitive. | - Potential scoping study |
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Section 3 Estimation and Reporting of Mineral Resources
(Criteria listed in the preceding section also apply to this section.)
| Criteria | JORC Code explanation | Commentary |
|---|---|---|
| Database | Measures taken to ensure that data has not been corrupted by, for | Assay results were verified by more than one Jindalee geologist. |
| integrity | example, transcription or keying errors, between its initial collection | Data is received and stored electronically with a comparison between |
| and its use for Mineral Resource estimation purposes. | the original .csv data files and the compiled database indicating no | |
| Data validation procedures used. | errors in transmission or transcription. | |
| H&SC only performed basic checks on the MS Access database | ||
| provided by JRL to ensure internal data integrity. | ||
| Site visits | Comment on any site visits undertaken by the Competent Person and | Site visits have been undertaken by Jindalee Competent Persons. |
| the outcome of those visits. | No site visit was undertaken by the Competent Person responsible for | |
| If no site visits have been undertaken indicate why this is the case. | the estimation of the MRE (mineral resource estimate) because the | |
| project is at an early stage of investigation. | ||
| Geological | Confidence in (or conversely, the uncertainty of) the geological | Lithium mineralisation occurs predominantly within specific |
| interpretation | interpretation of the mineral deposit. | stratigraphic units that can be correlated over project area using field |
| Nature of the data used and of any assumptions made. | mapping, aerial photography and drilling. The new drilling confirms | |
| The effect, if any, of alternative interpretations on Mineral Resource | the previous interpretation, adding to confidence in the continuity of | |
| estimation. | both geology and grade. | |
| The use of geology in guiding and controlling Mineral Resource | The MRE is based on 29 drill holes and a specific correlation of units | |
| estimation. | between drill holes has been assumed. | |
| The factors affecting continuity both of grade and geology. | Alternative interpretations could correlate the horizons differently from | |
| hole to hole, but this is unlikely to have a substantial impact on the | ||
| estimates. | ||
| The MRE is guided and controlled by stratigraphy, which is the major | ||
| control on the continuity of both grade and geology. | ||
| Stratigraphy is the major factor affecting the continuity both of grade | ||
| and geology, although lithium grades appear to be less continuous | ||
| than the individual stratigraphic units. | ||
| Dimensions | The extent and variability of the Mineral Resource expressed as | At a 1,000 ppm Li cut-off grade, the MRE has the following |
| length (along strike or otherwise), plan width, and depth below | approximate extent: | |
| surface to the upper and lower limits of the Mineral Resource. | 5.2 km in the north-south direction, |
|
| 4.9 km in the east-west direction, |
||
| 0-100m below surface, with~6m of overlying colluvium in places, |
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| Criteria | JORC Code explanation | Commentary |
|---|---|---|
| although only a proportion of layers (~63%) within this volume are | ||
| above cut-off grade. | ||
| Site visits | Comment on any site visits undertaken by the Competent Person and | Site visits have been undertaken by Jindalee Competent Persons. |
| the outcome of those visits. | No site visit was undertaken by the Competent Person responsible for | |
| If no site visits have been undertaken indicate why this is the case. | the estimation of the MRE (mineral resource estimate) because the | |
| project is at an early stage of investigation. | ||
| Estimation | The nature and appropriateness of the estimation technique(s) | Lithium grade was estimated with nominal 2.0m sample composites |
| and modelling | applied and key assumptions, including treatment of extreme grade |
using the ordinary kriging estimation technique in Datamine software. |
| techniques | values, domaining, interpolation parameters and maximum distance | The main mineralised domain was limited to potentially mineralised |
| of extrapolation from data points. If a computer assisted estimation | paleo-lake sediments, with overlying colluvium and underlying basalt | |
| method was chosen include a description of computer software and | estimated separately. The grade distribution for lithium is not strongly | |
| parameters used. | skewed so Ordinary Kriging (OK) was considered to be an | |
| The availability of check estimates, previous estimates and/or mine | appropriate estimation method; there are no extreme values requiring | |
| production records and whether the Mineral Resource estimate takes | grade cutting. Initial search radii for the MRE were 750x750x4m, then | |
| appropriate account of such data. | expanded to 1500x1500x8m. All Mineral Resources are confined to | |
| The assumptions made regarding recovery of by-products. | within 100m of surface, with at least 3 holes and 12 samples required | |
| Estimation of deleterious elements or other non-grade variables of | to inform these blocks. Stratigraphic control was achieved by using a | |
| economic significance (eg sulphur for acid mine drainage | dynamic search that followed the orientation of a geochemical marker | |
| characterisation). | horizon. The MRE was limited to blocks within 1,000m of holes, which | |
| In the case of block model interpolation, the block size in relation to | is the maximum distance of extrapolation. | |
| the average sample spacing and the search employed. | The new drilling effectively confirms the previous MRE, so the new | |
| Any assumptions behind modelling of selective mining units. | MRE does take appropriate account of this data. | |
| Any assumptions about correlation between variables. | No assumptions were made regarding recovery of by-products. | |
| Description of how the geological interpretation was used to control the resource estimates. |
No deleterious elements or other non-grade variables of economic significance were estimated. |
|
| Discussion of basis for using or not using grade cutting or capping. The process of validation, the checking process used, the comparison of model data to drill hole data, and use of reconciliation data if available. |
The model block size is 200x200x5m, which is approximately one half of the average sample spacing in the better drilled area, which is around 400m. The initial horizontal search radii are around 4 times the block size. Minimum sub-blocks are 40x40x1m. |
|
| No specific assumptions were made regarding selective mining units | ||
| (SMUs), so the model block size is effectively the SMU. | ||
| There are no assumptions about correlation between variables | ||
| because only lithium has been estimated. | ||
| The geological interpretation was used to control the resource | ||
| estimates through stratigraphic constraints imposed via the narrow |
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| Criteria | JORC Code explanation | Commentary |
|---|---|---|
| vertical radius and dynamic search strategy. | ||
| The grade distribution for lithium is not strongly skewed so no grade | ||
| cutting or capping was required. | ||
| The estimates were validated in a number of ways – visual and | ||
| statistical comparisons of block and drill hole grades, examination of | ||
| grade-tonnage data and comparison with previous MRE model. The | ||
| comparisons of model and drill hole data show that the estimates | ||
| appear reasonable. No reconciliation data is available because the | ||
| deposit remains unmined. | ||
| Moisture | Whether the tonnages are estimated on a dry basis or with natural | Tonnages were estimated on a dry weight basis; moisture was |
| moisture, and the method of determination of the moisture content. | determined by comparison of dry and wet sample weights. | |
| Cut-off | The basis of the adopted cut-off grade(s) or quality parameters | The adopted cut-off grade of 1,000 ppm Li is based on a |
| parameters | applied. | comprehensive economic model that incorporates a range of |
| conceptual costs for items including mining, processing, | ||
| administration and capital. | ||
| Mining factors | Assumptions made regarding possible mining methods, minimum |
The mining method is currently assumed to be open pit extraction. |
| or | mining dimensions and internal (or, if applicable, external) mining | The estimates include an allowance for internal mining dilution within |
| assumptions | dilution. It is always necessary as part of the process of determining | the blocks and sub-blocks, which currently define minimum mining |
| reasonable prospects for eventual economic extraction to consider | dimensions. | |
| potential mining methods, but the assumptions made regarding | The resource estimates do not include potential external mining | |
| mining methods and parameters when estimating Mineral Resources | dilution arising from factors such as blast movement, mixing of | |
| may not always be rigorous. Where this is the case, this should be | materials during blasting and digging, or misallocation of ore and | |
| reported with an explanation of the basis of the mining assumptions | waste. | |
| made. | Assumptions regarding mining are conceptual at this stage of the | |
| project. | ||
| Metallurgical | The basis for assumptions or predictions regarding metallurgical | Lithium at McDermitt is hosted within or adsorbed onto clay minerals. |
| factors or | amenability. It is always necessary as part of the process of | Recent metallurgical testwork showed that beneficiation by attrition |
| assumptions | determining reasonable prospects for eventual economic extraction to | scrubbing can increase lithium grades by up to 60% and leaching |
| consider potential metallurgical methods, but the assumptions | results confirmed high lithium extraction rates (~95%) from | |
| regarding metallurgical treatment processes and parameters made | beneficiated samples with reduced acid consumption. Additional work | |
| when reporting Mineral Resources may not always be rigorous. | to further optimise metallurgical processes is underway. | |
| Where this is the case, this should be reported with an explanation of | Assumptions regarding metallurgical amenability are conceptual at | |
| the basis of the metallurgical assumptions made. | this stage of the project. |
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| Criteria | JORC Code explanation | Commentary |
|---|---|---|
| Environmen- | Assumptions made regarding possible waste and process residue | At this stage of the project, limited environmental investigations have |
| tal factors or | disposal options. It is always necessary as part of the process of | been conducted and no environmental assumptions have been made |
| assumptions | determining reasonable prospects for eventual economic extraction to | beyond that a conventional open-pit mine and processing facilities |
| consider the potential environmental impacts of the mining and | should be possible. | |
| processing operation. While at this stage the determination of | It is assumed that all necessary environmental approvals will be in | |
| potential environmental impacts, particularly for a greenfields project, | place when mining commences. All waste and process residues will | |
| may not always be well advanced, the status of early consideration of | be disposed of in a responsible manner and in accordance with the | |
| these potential environmental impacts should be reported. Where | mining license conditions. | |
| these aspects have not been considered this should be reported with | ||
| an explanation of the environmental assumptions made. | ||
| Bulk density | Whether assumed or determined. If assumed, the basis for the | Dry bulk density (DBD) for the MRE was estimated using a regression |
| assumptions. If determined, the method used, whether wet or dry, the | between density and depth below surface, based on measurements |
|
| frequency of the measurements, the nature, size and | taken on 33 sections of HQ core from the 2018 and 2019 drill | |
| representativeness of the samples. | programs. Shortly after retrieval from the hole the length (typically | |
| The bulk density for bulk material must have been measured by | 20cm) and diameter were measured in several locations on each | |
| methods that adequately account for void spaces (vugs, porosity, | piece of core using measuring tape and Vernier callipers respectively. | |
| etc), moisture and differences between rock and alteration zones | The samples were securely wrapped and subsequently dried and | |
| within the deposit. | weighed by ALS Laboratories in Reno to estimate dry bulk density via | |
| Discuss assumptions for bulk density estimates used in the | DBD = weight/volume. The results indicated a variation with depth | |
| evaluation process of the different materials. | below surface, and the DBD estimates used for each block were | |
| determined using the regression DBD = 1.4134 + (DEPTH x 0.0012), | ||
| capped at a maximum of 2.00 t/m3. The average DBD across the | ||
| volume estimated is 1.48 t/m3. | ||
| The bulk density was measured by a method that adequately | ||
| accounts for void spaces (vughs, porosity, etc), moisture and | ||
| differences between rock and alteration zones within the deposit. | ||
| The bulk density formula was applied to the mineralised sediments | ||
| and the overlying colluvium. | ||
| Classification | The basis for the classification of the Mineral Resources into varying | The MRE was classified using the estimation search passes and |
| confidence categories. | additional criteria. Indicated Mineral Resources were defined using | |
| Whether appropriate account has been taken of all relevant factors (ie | search radii of 750x750x4m, while Inferred Resources used radii of |
|
| relative confidence in tonnage/grade estimations, reliability of input | 1500x1500x8m. All Mineral Resources are confined to within 100m of | |
| data, confidence in continuity of geology and metal values, quality, | surface, with at least 3 holes and 12 samples required to inform these | |
| quantity and distribution of the data). | blocks. The Inferred MRE was limited to blocks within 1,000m of | |
| Whether the result appropriately reflects the Competent Person’s | holes and 37% of this material is extrapolated beyond drill holes. |
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| Criteria | JORC Code explanation | Commentary |
|---|---|---|
| view of the deposit. | Appropriate account has been taken of all relevant factors, including | |
| relative confidence in tonnage/grade estimates, reliability of input data, | ||
| confidence in continuity of geology and metal values, quality, quantity | ||
| and distribution of the data. | ||
| The reported MRE appropriately reflects the Competent Person’s | ||
| view of the deposit. | ||
| Audits or | The results of any audits or reviews of Mineral Resource estimates. | No independent audits or reviews have been undertaken to date; the |
| reviews | MRE has been subject to internal peer review within H&SC. | |
| Discussion of | Where appropriate a statement of the relative accuracy and | The relative accuracy and confidence level in the Mineral Resource |
| relative | confidence level in the Mineral Resource estimate using an approach | estimates are considered to be in line with the generally accepted |
| accuracy/ | or procedure deemed appropriate by the Competent Person. For | accuracy and confidence of the nominated JORC Mineral Resource |
| confidence | example, the application of statistical or geostatistical procedures to | category. This has been determined on a qualitative, rather than |
| quantify the relative accuracy of the resource within stated confidence | quantitative, basis, and is based on the Competent Person’s |
|
| limits, or, if such an approach is not deemed appropriate, a qualitative | experience with similar deposits. Factors that could affect the relative |
|
| discussion of the factors that could affect the relative accuracy and | accuracy and confidence of the estimate include: | |
| confidence of the estimate. | The correlation of mineralised horizons, |
|
| The statement should specify whether it relates to global or local | The continuity of higher grade samples. |
|
| estimates, and, if local, state the relevant tonnages, which should be | The estimates are local, in the sense that they are localised to model | |
| relevant to technical and economic evaluation. Documentation should | blocks of a size considered appropriate for local grade estimation. The |
|
| include assumptions made and the procedures used. | Inferred Mineral Resources could be relevant to technical and | |
| These statements of relative accuracy and confidence of the estimate | economic analysis at the level of a Scoping Study, while the Indicated |
|
| should be compared with production data, where available. | Mineral Resources could be relevant to technical and economic | |
| analysis at the level of a Pre-Feasibility or Feasibility Study. | ||
| No production data is available as the deposit remains unmined. |
22