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LINDIAN RESOURCES LIMITED — Capital/Financing Update 2021
Feb 3, 2021
65236_rns_2021-02-03_da45a9c4-d6e5-49b7-91eb-4f5b2a7c2143.pdf
Capital/Financing Update
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ASX ANNOUNCEMENT 4 FEBRUARY 2021
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DIGESTION TEST RESULTS GAOUAL HIGH GRADE CONGLOMERATE BAUXITE PROJECT
HIGHLIGHTS
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The digestion test work completed on the screened ores has confirmed they are Gibbsite dominant and suited well to both Low Temperature and High Temperature Bayer process alumina refineries.
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With the much-reduced silica levels in the screened ores, the Reactive silica percentage levels are now in line with the highest quality bauxites in Guinea .
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The Gaoual Project’s Bouba Conglomerate Bauxite Plateau has a high grade tonnage of 83.8 Mt[1] (45% Al2O3 Cut off grade – indicated category) which has the capacity to have the ore quality significantly upgraded using a simple screening process.
Lindian Resources Limited (ASX: LIN ) (“ Lindian ” or “ the Company ”) is pleased to advise it has received results of the Digestion test work on the screened ores from the Bouba Plateau within the Gaoual High Grade Conglomerate Bauxite Project in Guinea.
DIGESTION RESULTS SUMMARY
Digestion test work was completed upon the coarse fraction of the beneficiated bauxite ores from the primary screening test work completed in December 2020 - January 2021. This test work was completed so as to confirm the “digest-ability” of the ores in both Low Temperature and High Temperature digestion settings and to confirm the mineralogical make-up of the materials being tested.
| Al2O3 | SiO2 | Fe2O3 | LOI | Total Available Alumina (“TAA”) | Reactive Silica (“RSi”) | |
|---|---|---|---|---|---|---|
| Low TempHigh Temp | Low TempHigh Temp | |||||
| Coarse Fraction – High | 58.4% | 2.8% | 7.6% | 28.1 | 51.2% 54.4% | 1.6% 2.6% |
| Grade (After screening) | ||||||
| Bouba Conglomerate | ||||||
| Bauxite Plateau1 |
Table 1: Summary of Digestion Results
A total of 28 tests were completed upon the coarse fraction bauxite ore samples, representing 4 samples from each of the 7 test pits sampled. Each sampled was digested at both low temperature and high temperature equivalents by Bureau Veritas – Perth with Total Available Alumina (“TAA”) and Reactive Silica (“RSi”) reported. A summary of the results is as below:
1 Refer ASX releases dated 15 July 2020 for full details of Mineral Resources Estimates and 19 January 2021 for Gaoual screening test work results. The Company confirms that it is not aware of any new information or data that materially affects the information included in this document and that all material assumptions and technical parameters underpinning the estimates continue to apply and have not materially changed.
Level 24 108 St Georges Terrace Perth WA 6000 Australia ASX :LIN www.lindianresources.com.au
Chairman Asimwe Kabunga T : +61 8 6557 8838 E : [email protected] Non Executive Directors Giacomo (Jack) Fazio Enquiries regarding this Yves Occello 1 announcement can be directed to: Chief Operating Officer/CFO David Sumich Asimwe Kabunga
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ASX RELEASE 4 FEBRUARY 2021
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The Low Temperature (“LT”) Digestions of the high grade (“HG”) test pits bauxite averaged 88% TAA recovery (51.2% TAA) and 59% RSi recovery (1.6% RSi). The High Temperature (“HT”) Digestions of the HG test pits bauxite averaged 93% TAA recovery (54.4% TAA) and 92% RSi recovery (2.6% RSi).
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The lower of recoveries in TAA in the LT Digestions of the HG pits bauxite ore is caused by a minor component of Boehmite. This is determined by the HT digestions having a smaller range of TAA recoveries and are those TAA recoveries themselves being very high (>90% TAA).
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The increasing RSi recovery from LT to HT digestions for the HG test pits indicates that there is only a small presence of coarse unreactive quartz, and quartz that is present may be very fine grained and able to be digested at the HT digestions.
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The LG test pits indicated that all of the coarse fraction bauxite samples were able to be digested easily with LT TAA recoveries ranging from 85-87% recovery (averaging 86%), and the HT TAA recoveries ranging from 88-90% recovery (averaging 89%),
The digestion test work completed upon the beneficiated ores has confirmed that these ores are gibbsite dominant and suited well to both LT and HT Bayer process alumina plants. With the much-reduced silica levels in the beneficiated ores, the RSi grades have now been decreased to levels in line with the highest quality bauxites being mined and exported from Guinea.
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Table 2: Summary of Digestion Results by High Grade and Low Grade pits.
Competent Person’s Statement - Guinea
“The information in this announcement that relates to exploration results is based on information compiled or reviewed by Mr Mark Gifford, an independent Geological expert consulting to Lindian Resources Limited. Mr Mark Gifford is a Fellow of the Australian Institute of Mining and Metallurgy and has sufficient experience which is relevant to the style of mineralisation and type of deposit under consideration and to the activity which he is undertaking to qualify as a Competent Person as defined in the December 2012 edition of the “Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves” (JORC Code). Mr Gifford consents to the inclusion in the announcement of the matters based on his information in the form and context in which it appears ”.
This ASX announcement was authorised for release by the Lindian Board.
For further information, please contact:
Asimwe Kabunga Chairman Phone : +61 8 6557 8838 Email : [email protected] www.lindianresources.com.au
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ASX RELEASE 4 FEBRUARY 2021
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ABOUT LINDIAN RESOURCES LIMITED
Lindian Resources Limited (“Lindian”) is a bauxite focused exploration company listed on the Australian Stock Exchange under the ASX code LIN.
The combination of assets offers the opportunity for near term production via the Woula Project while simultaneously advancing the larger, multi-generational bauxite assets, the very high grade Conglomerate Bauxite Gaoual Project and the world class Tier 1 Lelouma Project.
Company Highlights
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Very high quality product available from Gaoual Project ( 58.4% Al2O3 & 2.8% SiO2 )
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• ~1Bt of high quality (JORC 2012) resources.
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• Strategic landholding in the premier bauxite province
o95% of African bauxite exports are from Guinea -
oGuinea the no.1 exporter to China -
o7 bauxite export terminals in Guinea Figure 1 – Lindian Project Location Map[1]
GAOUAL PROJECT SCREENING TEST WORKS
Screening test work results from the Bouba Conglomerate Bauxite Plateau within the Gaoual Project confirmed that a simple screening process reduced SiO2 significantly (to 2.8% SiO2 ) and raised Al2O3 ( to 58.4%) in the conglomerate samples, with minimal loss of tonnage.
The Gaoual Project’s Bouba Conglomerate Bauxite Plateau has a high grade tonnage of 83.8 Mt[1] (45% Al2O3 Cut off grade – indicated category) which has the capacity to have the ore quality significantly upgraded using a simple screening process.
1 Refer ASX releases dated 15 July 2020 (Gaoual Project), 23 September (Woula Project), and 6 October 2020 (Lelouma Project) for full details of Mineral Resources Estimates and 19 January 2021 for Gaoual screening test work results. The Company confirms that it is not aware of any new information or data that materially affects the information included in this document and that all material assumptions and technical parameters underpinning the estimates continue to apply and have not materially changed.
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ASX RELEASE 4 FEBRUARY 2021
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Table 1 – Geochemical Analysis of the Coarse and Fine-Grained Screening Fractions – High Grade[1 ]
| Resources (Mt) |
Cut-off (Al2O3 %) |
Grade (Al2O3 %) |
Grade (SiO2 %) |
Category | |
| Lelouma Project | |||||
| High Grade Resources | 398 | >45 | 48.1 | 2.0 | Measured + Indicated |
| Total Lelouma Resources | 900 | >40 | 45.0 | 2.1 | Measured + Ind.+ Inf. |
| Gaoual Project | |||||
| High Grade Resources | 83.8 | >45 | 51.2 | 11.0% | Indicated |
| Total Gaoual Resources | 101.5 | >40 | 49.8 | 11.5% | Indicated |
| Woula Project | |||||
| High Grade Resources | 19.0 | >40 | 41.7 | 3.2% | Inferred |
| Total Woula Resources | 64.0 | >34 | 38.7 | 3.1% | Inferred |
| TOTAL RESOURCES 1,065 Mt |
Table 2 – Lindian Bauxite Projects – Mineral Resource Estimate (JORC 2012) Summary[1 ]
CHINA RAILWAY SEVENTH GROUP MOU
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The MOU has been executed to determine an infrastructure solution and to accelerate development of Lindian’s projects.
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CRSG, through its affiliates and related entities and partners could facilitate in development financing and/or introducing offtake partners.
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Lindian seeking to establish a consortium to develop the Woula project and the larger Gaoual/Lelouma projects
Lindian also has two bauxite licenses in Tanzania at Lushoto and Pare, which are currently at an early stage, but offer geographical diversification within the Company’s bauxite portfolio. The Company also holds a number of early-stage gold licences in Tanzania, which are currently under review.
The Company’s strategy is to develop projects that meet international standards of environmental compliance, create benefits for the local communities and deliver strong returns for the Company’s shareholders.
1 Refer ASX releases dated 15 July 2020 (Gaoual Project), 23 September (Woula Project), and 6 October 2020 (Lelouma Project) for full details of Mineral Resources Estimates and 19 January 2021 for Gaoual screening test work results. The Company confirms that it is not aware of any new information or data that materially affects the information included in this document and that all material assumptions and technical parameters underpinning the estimates continue to apply and have not materially changed.
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Section 1 Sampling Techniques and Data
| Criteria | JORC Code explanation | Commentary |
|---|---|---|
| Sampling | • Nature and quality of sampling (eg cut | •7 Test Pits were dug within the field |
| techniques | channels, random chips, or specific | area. A single 60-80kg sample was |
| specialised industry standard measurement | collected from each one-meter-deep |
|
| tools appropriate to the minerals under | pit and it was cone and quartered | |
| investigation, such as down hole gamma | into 4 samples. These 4 samples | |
| sondes, or handheld XRF instruments, etc). | were dried and then passed over a |
|
| These examples should not be taken as | 1.5mm screen from which the over | |
| limiting the broad meaning of sampling. | and under sized material was | |
| • Include reference to measures taken to | weighed and then both cone and | |
| ensure sample representivity and the | quartered. All samples were | |
| appropriate calibration of any measurement | transferred to the Bureau Veritas - |
|
| tools or systems used. | Mali prep lab facility. | |
| • Aspects of the determination of | •Sample representivity was ensured | |
| mineralisation that are Material to the Public | by the taking of all cuttings from the |
|
| Report. | small test pit developed. These | |
| • In cases where ‘industry standard’ work has | samples were weighed, logged and |
|
| been done this would be relatively simple | then cone and quartered into 4 15- | |
| (eg ‘reverse circulation drilling was used to | 20kg samples prior to screening. The | |
| obtain 1 m samples from which 3 kg was | screened material was then cone and | |
| pulverised to produce a 30 g charge for fire | quartered and forwarded for sample | |
| assay’). In other cases more explanation | preparation. | |
| may be required, such as where there is | •The samples tested were | |
| coarse gold that has inherent sampling | conglomerate bauxite samples, a | |
| problems. Unusual commodities or | less common bauxite found within | |
| mineralisation types (eg submarine | Guinea. The determination aids in | |
| nodules) may warrant disclosure of detailed | the confirmation of this specific ore |
|
| information. | type. | |
| •Bauxite sampling has smaller | ||
| potential error due to the element | ||
| which forms the bulk of the material | ||
| is the element being analysed for. It | ||
| is not possible to significantly dilute | ||
| alumina grade in a bauxite sample | ||
| unless the material is not bauxite and | ||
| not related to the mineralised profile. | ||
| Drilling | • Drill type (eg core, reverse circulation, | •Not applicable. |
| techniques | open-hole hammer, rotary air blast, auger, | |
| Bangka, sonic, etc) and details (eg core | ||
| diameter, triple or standard tube, depth of | ||
| diamond tails, face-sampling bit or other | ||
| type, whether core is oriented and if so, by | ||
| _what method, etc). _ | ||
| Drill sample | • Method of recording and assessing core | •Not applicable. |
| recovery | and chip sample recoveries and results | |
| assessed. | ||
| • Measures taken to maximise sample | ||
| recovery and ensure representative nature | ||
| of the samples. | ||
| • Whether a relationship exists between | ||
| sample recovery and grade and whether | ||
| sample bias may have occurred due to |
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| Criteria | JORC Code explanation | Commentary |
|---|---|---|
| preferential loss/gain of fine/coarse | ||
| material. | ||
| Logging | • Whether core and chip samples have been | •Logging was carried out on each of |
| geologically and geotechnically logged to a | the samples including lithology, | |
| level of detail to support appropriate Mineral | amount of weathering by a suitably |
|
| Resource estimation, mining studies and | qualified geologist. | |
| metallurgical studies. | •Data is initially conducted on paper | |
| • Whether logging is qualitative or | logging sheets and is then | |
| quantitative in nature. Core (or costean, | transferred to an Access database | |
| channel, etc) photography. | •All of the samples recovered from the | |
| • The total length and percentage of the | test pits completed were logged. | |
| relevant intersections logged. | There is a total of 7 bulk samples | |
| with 100% logged. | ||
| Sub- | • If core, whether cut or sawn and whether | |
| sampling | quarter, half or all core taken. | •All sampling was carefully supervised |
| techniques | • If non-core, whether riffled, tube sampled, | with ticket books containing pre- |
| and sample | rotary split, etc and whether sampled wet or | numbered tickets placed in the |
| preparation | dry. | sample bag and double checked |
| • For all sample types, the nature, quality and | against the ticket stubs and field |
|
| appropriateness of the sample preparation | sample sheets to guard against mix | |
| technique. | ups. | |
| • Quality control procedures adopted for all | •All sub samples were taken by cone | |
| sub-sampling stages to maximise | and quartering. The samples were | |
| representivity of samples. | dry due to the drying of the bulk | |
| • Measures taken to ensure that the sampling | sample prior to cone and quartering |
|
| is representative of the in situ material | and subsequent screening. The sub | |
| collected, including for instance results for field duplicate/second-half sampling. |
samples were predominantly >25% of the total sample weight. |
|
| • Whether sample sizes are appropriate to | •Field duplicates, blanks and | |
| the grain size of the material being | authorized standards were be | |
| sampled. | incorporated into the sample string | |
| when collated at a ratio of 1 per | ||
| twenty primary samples for each of | ||
| the components. | ||
| Quality of | • The nature, quality and appropriateness of | •All assays were completed by |
| assay data | the assaying and laboratory procedures | Bureau Veritas – Perth using an XRF |
| and | used and whether the technique is | analyser and a standard bauxite |
| laboratory | considered partial or total. | micro-digestion method. The XRF |
| tests | • For geophysical tools, spectrometers, | analysis was total with 14 elements |
| handheld XRF instruments, etc, the | and the LOI determined. The micro- | |
| parameters used in determining the | digestion analysis reported Total | |
| analysis including instrument make and | Available Alumina and Reactive | |
| model, reading times, calibrations factors | Silica at two temperature settings | |
| applied and their derivation, etc. | (high and low). | |
| • Nature of quality control procedures | •Standards were within the primary | |
| adopted (eg standards, blanks, duplicates, | sample string, as well as numerous | |
| external laboratory checks) and whether | standards added by Bureau Veritas – | |
| acceptable levels of accuracy (ie lack of | Perth within the sample series. All | |
| bias) and precision have been established. | standard grades reported were | |
| extremely accurate and consistent | ||
| across all elements and the LOI | ||
| determinations. | ||
| •Field duplicates, blanks and | ||
| authorized standards were |
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| Criteria | JORC Code explanation | Commentary | Commentary |
|---|---|---|---|
| incorporated into the final sample | |||
| string when collated at a ratio of 1 | |||
| per twenty primary samples for each | |||
| of the components. Review of the | |||
| duplicates taken in the field showed | |||
| an extremely high level of | |||
| repeatability and a lack of any bias. | |||
| Blanks were from a quartz sand and | |||
| there was no form of dilution or | |||
| enrichment of any elements within | |||
| the blanks in comparison to each | |||
| other or over time. Standards were | |||
| accurate in regards to both those | |||
| placed into the sample string by | |||
| Lindian and those used by Bureau | |||
| Veritas – Perth during analysis. | |||
| Repeats completed by Bureau | |||
| Veritas – Perth were highly accurate | |||
| and showed no bias in any form. | |||
| Verification | • The verification of significant intersections | ||
| of sampling | by either independent or alternative | • | Data was recorded by the sampling |
| and assaying | company personnel. | geologist, entered in a company’s | |
| • The use of twinned holes. | designed excel spreadsheet before | ||
| • Documentation of primary data, data entry | being uploaded to the company’s | ||
| procedures, data verification, data storage | Access database. The excel | ||
| (physical and electronic) protocols. | spreadsheet is designed to detect | ||
| • Discuss any adjustment to assay data. | any errors entered. The Access | ||
| database contains data QAQC | |||
| queries. | |||
| Location of | • Accuracy and quality of surveys used to | • | A hand-held GPS was used to |
| data points | locate drill holes (collar and down-hole | identify the position of all samples | |
| surveys), trenches, mine workings and | and drill sites (xy horizontal error of 5 | ||
| other locations used in Mineral Resource | metres) and reported using WGS 84 | ||
| estimation. | grid and UTM datum zone 28 North. | ||
| • Specification of the grid system used. | |||
| • Quality and adequacy of topographic | |||
| control. | |||
| Data spacing | • Data spacing for reporting of |
• | The test pits were completed within |
| and | Exploration Results. | the plateaux tested at a variety of | |
| distribution | • Whether the data spacing and | spacings so as to ensure a range of | |
| distribution is sufficient to establish the | grades of ore was tested by the | ||
| degree of geological and grade | screening program. | ||
| continuity appropriate for the Mineral | • | No compositing of the samples has | |
| Resource and Ore Reserve estimation | been applied. All samples were | ||
| procedure(s) and classifications | collected and analysed as 1m test pit | ||
| applied. | samples. | ||
| • Whether sample compositing has been | |||
| applied. | |||
| Orientation | • Whether the orientation of sampling | • | Not applicable. |
| of data in | achieves unbiased sampling of possible | ||
| relation to | structures and the extent to which this is | ||
| geological | known, considering the deposit type. | ||
| structure | • If the relationship between the drilling |
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| Criteria | JORC Code explanation | Commentary |
|---|---|---|
| orientation and the orientation 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 | •The samples are currently held near |
| security | security. | the collection location within a secure |
| compound. All samples were sub | ||
| sampled in the compound with the | ||
| sample for analysis placed in the | ||
| string order and bagged as sets of 20 | ||
| samples. The remainder of the | ||
| samples were stored for possible | ||
| future work. The samples were all | ||
| individually accredited a sample | ||
| number and this was used through | ||
| the total process from sample | ||
| preparation through to full analysis. | ||
| Audits or | • The results of any audits or reviews of | •An audit of the process was |
| reviews | sampling techniques and data. | undertaken by the author of the |
| resultant resource report and it was | ||
| considered accurate and | ||
| representative for the subsequent | ||
| sampling, preparation and analysis | ||
| process. |
Section 2 Reporting of Exploration Results
(Criteria listed in the preceding section also apply to this section.)
| Criteria | JORC Code explanation | Commentary |
|---|---|---|
| Mineral tenement and land tenure | • Type, reference name/number, |
•The under application 22584 |
| status | location and ownership | was applied in 3rd March 2019 |
| including agreements or | for prospecting Bauxite. The | |
| material issues with third | licences may be granted | |
| parties such as joint ventures, | anytime. | |
| partnerships, overriding | The area covered by the | |
| royalties, native title interests, | application is 332.3 km2. It is | |
| historical sites, wilderness or | situated in the Koumbia/ | |
| national park and | Gauoal region, Guinea | |
| environmental settings. | •The application is held under | |
| • The security of the tenure held | KB Bauxite Guinee SARLU | |
| at the time of reporting along | which incorporated in Guinea. | |
| with any known impediments | The surface area is | |
| to obtaining a licence to | administered by the | |
| operate in the area. | Government as native title. | |
| The area is rural, with small | ||
| villages. | ||
| Exploration done by other parties | • Acknowledgment and | •There is no written record of |
| appraisal of exploration by | previous exploration available | |
| other parties. | for this area known to KB | |
| Bauxite Guinea SARLU. The | ||
| location of the Bauxite was |
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| Criteria | JORC Code explanation | Commentary |
|---|---|---|
| determined by colonial | ||
| mapping and a recently | ||
| conducted site visit by the | ||
| company personnel. | ||
| Geology | • Deposit type, geological | •The exploration targets occur |
| setting and style of | in the elevated areas of the | |
| mineralisation. | application. The ore zone is an | |
| occurrence of conglomerate | ||
| bauxite which formed through | ||
| the erosion of surrounding “in | ||
| situ” bauxite into a valley | ||
| during a period of significant | ||
| erosion. The conglomerate | ||
| was deposited over a | ||
| sandstone base and upon | ||
| changing climatic conditions | ||
| and the redevelopment of river | ||
| systems the conglomerate was | ||
| subsequently eroded with only | ||
| a remnant of the original “pile” | ||
| remaining. This type of | ||
| mineralization is rare and | ||
| known by the type location of | ||
| Sangaredi where it was | ||
| defined and mined from the | ||
| 1970’s to early in the 21st | ||
| Century. | ||
| Drill hole Information | • A summary of all information | •No exploration results are |
| material to the understanding | being reported in this release. | |
| of the exploration results | The information being | |
| including a tabulation of the | provided is a summary of a | |
| following information for all | simple screening program of | |
| Material drill holes: | the conglomerate bauxite ores | |
o easting and northing of the |
present as the mineralised unit | |
| drill hole collar | of the Bouba Plateau. | |
o elevation or RL (Reduced |
•The drill hole information has | |
| Level – elevation above | been incorporated into the | |
| sea level in metres) of the | quantification of the resource | |
| drill hole collar | previously released prior to | |
o dip and azimuth of the hole |
this geotechnical test work | |
o down hole length and |
program. | |
| 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 aggregation methods | • In reporting Exploration | •There are no Exploration |
| Results, weighting averaging | results being reported in this | |
| techniques, maximum and/or | release due to the |
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| Criteria | JORC Code explanation | Commentary |
|---|---|---|
| minimum grade truncations (eg | development of a qualified |
|
| cutting of high grades) and | resource. | |
| cut-off grades are usually | •No High Grade intercepts were | |
| Material and should be stated. | reported. | |
| • Where aggregate intercepts | •No metal equivalents were | |
| incorporate short lengths of | reported. | |
| high grade results and longer | ||
| lengths of low grade results, | ||
| the procedure used for such | ||
| aggregation should be stated | ||
| and some typical examples of | ||
| such aggregations should be | ||
| shown in detail. | ||
| • The assumptions used for any | ||
| reporting of metal equivalent | ||
| values should be clearly | ||
| stated. | ||
| Relationship between | • These relationships are | •No mineralised intercepts were |
| mineralisation widths and | particularly important in the | reported within this release. |
| intercept lengths | reporting of Exploration | |
| Results. | ||
| • If the geometry of the | ||
| mineralisation with respect to | ||
| the drill hole angle is known, | ||
| its nature should be reported. | ||
| • If it is not known and only the | ||
| down hole lengths are | ||
| reported, there should be a | ||
| clear statement to this effect | ||
| (eg ‘down hole length, true | ||
| _width not known’). _ | ||
| Diagrams | • Appropriate maps and | •No exploration results are |
| sections (with scales) and | being reported in this release, | |
| tabulations of intercepts | thus there are no maps and | |
| should be included for any | sections of preliminary | |
| significant discovery being | exploration results. | |
| reported These should include, | ||
| but not be limited to a plan | ||
| view of drill hole collar | ||
| locations and appropriate | ||
| sectional views. | ||
| Balanced reporting | • Where comprehensive | •The reported and quantified |
| reporting of all Exploration | screening test results | |
| Results is not practicable, | presented provides the basis | |
| representative reporting of | for the balanced reporting of | |
| both low and high grades | the exploration results with | |
| and/or widths should be | reference to the potential for | |
| practiced to avoid misleading | upgrading of the Bouba | |
| reporting of Exploration | Conglomerate Bauxite | |
| Results. | Resource. | |
| Other substantive exploration | • Other exploration data, if | •The Bouba Conglomerate |
| data | meaningful and material, | Bauxite Resource has been |
| should be reported including | defined and recognised as a | |
| (but not limited to): geological | high grade bauxite with quite | |
| observations; geophysical | highgrade silica as agangue |
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| Criteria | JORC Code explanation | Commentary |
|---|---|---|
| survey results; geochemical | component. It was proposed | |
| survey results; bulk samples – | that by screening the resource | |
| size and method of treatment; | the fines material could | |
| metallurgical test results; bulk | preferentially be enriched in | |
| density, groundwater, | silica, thus reducing the silica | |
| geotechnical and rock | content within the remaining | |
| characteristics; potential | bauxite rich pebbles. A simple | |
| deleterious or contaminating | series of tests was completed | |
| substances. | so as to determine the validity | |
| of the assumptions and the | ||
| impact such a simple | ||
| geotechnical process would | ||
| impact on potential reserve | ||
| tonnages and grade. The test | ||
| work is not quantitative in | ||
| nature, but qualitative | ||
| providing an opportunity to | ||
| develop a higher alumina | ||
| grade product with less silica | ||
| (a deleterious element in the | ||
| bauxite digestion process). | ||
| Digestion test work of the | ||
| bauxite ores has been | ||
| completed upon the remnant | ||
| bauxite ore pulps so as to | ||
| ensure that the bauxite ores | ||
| tested were of typical gibbsite | ||
| dominant bauxite, and | ||
| providing high recoveries | ||
| when processed through a | ||
| Bayer process alumina plant. | ||
| Digestion test work was | ||
| completed at both high and | ||
| low temperature definitions so | ||
| as to mimic the range of major | ||
| Bayer plant operations | ||
| globally. | ||
| Further work | • The nature and scale of | •Further geotechnical test work |
| planned further work (eg tests | has yet to be completed and | |
| for lateral extensions or depth | results of this work will aid in | |
| extensions or large-scale step- | the understanding of the | |
| out drilling). | screening effects upon the | |
| • Diagrams clearly highlighting | Bouba Conglomerate Bauxite | |
| the areas of possible | Resource. | |
| extensions, including the main | ||
| geological interpretations and | ||
| future drilling areas, provided | ||
| this information is not | ||
| commercially sensitive. |