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DART MINING NL — Regulatory Filings 2017
Apr 2, 2017
64792_rns_2017-04-02_766aed15-5dac-4c02-908f-4b7f644901a7.pdf
Regulatory Filings
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ASX Release
LITHIUM EXPLORATION UPDATE
03 April 2017
EXPLORATION HIGHLIGHTS
-
Preliminary sampling confirms lithium fertile LCT dykes up to 1.13% Li2O
-
Spodumene (primary hard rock lithium ore type) identified within multiple dykes over 12km along the Dorchap Dyke Swarm within EL5315 Mitta
-
Reconnaissance mapping shows the Eagle pegmatite dyke (10m @ 0.94% Li2O) is up to 60m wide and extends beyond current mapping over 180m in length
-
Preliminary assays seen as highly encouraging with only 13 dykes of circa 1800 dykes visited to date with ongoing exploration continuing along some 60km of the dyke swarm
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Preliminary sampling identifies potential exploration vector to ideal dyke geochemistry based on fractionation index
-
Additional EL application EL006486 - covering final remaining portion - will, upon granting, give Dart sole tenure to the entire Dorchap Dyke Swarm over some 60km of strike.
SPODUMENE IDENTIFIED IN DORCHAP DYKE SWARM
Dart Mining NL (Dart) is the first to explore the Dorchap Dyke Swarm for its lithium potential and to identify spodumene within the pegmatites, which is recognised as the primary source of hard rock lithium ore worldwide. This discovery by Dart signifies a completely new lithium pegmatite province of significant size over which it has a commanding tenement position. Encouraging results of a reconnaissance mapping and sampling program comprising 27 samples (Appendix 1) over 13 separate dykes at the northern end of the Dorchap Dyke Swarm are now available. In addition to assay analysis, mineral species identification was also carried out using X-ray powder diffraction (XRD) at Federation University, Ballarat. The test work has confirmed the presence of spodumene in all 7 samples submitted for identification, collected from dykes stretching along a 12km strike trend within EL5315. It was considered adequate to submit only 7 samples for XRD analysis. The identification of significant spodumene within the dykes of the swarm is highly encouraging, particularly given that this exploration is the first evaluation of the dyke swarms lithium prospectivity.
The preliminary nature of the mapping and limited sampling to date establishes the highly prospective LCT (Lithium–Caesium–Tantalum) nature of the pegmatite dykes of the Dorchap swarm, stretching some 60km from Glen Wills in the south to Eskdale in the north (Figure 1). The dykes sampled to date represent only 0.7% of the total circa 1800 dykes currently identified at the northern end of the swarm. The limited grab and rock chip sampling conducted comprises 29 rock chip and grab samples and confirms the presence of lithium oxide (Li2O) up to 1.57% at the Blue Jacket Dyke – Glen Wills (See DTM ASX 9 August 2016) and 4m @ 1.13% at the Gosport Group Dyke – Eskdale (Figure 1 & Photograph 1). The identification of spodumene by XRD in all 7 dyke samples submitted for analysis illustrates the highly prospective nature of the swarm.
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ASX Code: DTM
Key Prospects / Commodities: GOLD
Mountain View / New Discovery - Au Fairleys - Au Rushworth – Phoenix - Au Onslow – Au Saltpetre Gap - Au
LITHIUM / TIN / TANTALUM
Glen Wills – Li-Sn-Ta Eskdale / Mitta – Li-Sn-Ta
PORPHYRY GOLD / COPPER / MOLYBDENUM
Empress – Au-Cu Stacey’s – Au-Cu Copper Quarry: Cu+/- Au Gentle Annie: Cu
Morgan Porphyry: Mo-Ag-Au Unicorn Porphyry: Mo-Cu-Ag
Investment Data:
Shares on issue: 379,485,049 Unlisted options: 1,450,000
Substantial Shareholders:
Top 20 Holdings: 41.37 %
Board & Management:
Managing Director: James Chirnside Non-Executive Director: Luke Robinson Non-Executive Director: Russell Simpson Company Secretary: Julie Edwards
Dart Mining NL
ACN 119 904 880
Contact Details:
4 Bryant Street, Corryong VIC 3707 Australia
James Chirnside
Phone: +61 (0)419 605 842 Email: [email protected]
Visit our webpage: www.dartmining.com.au
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Figure 1. Tenement location and extent of pegmatite dykes of the Dorchap Dyke Swarm.
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Photograph 1 . Gosport (Group) Dyke chip sample traverse 4m @ 1.13% Li2O.
Photograph 2 . James Chirnside in front of outcropping Eagle Dyke Pegmatite, showing a width of up to 60m.
2
It is not yet known if the individual LCT dykes are zoned internally. There are currently far too few samples along the swarm to establish a regional zonation (if this exists), with the sampling carried out interpreted to show increasing fractionation (prospectivity) from west to east (further discussed below).
EAGLE DYKE MAPPING AND SAMPLING RESULTS
Whilst to date only the Eagle Dyke (Figure 1 & 2) has been mapped in sufficient detail to evaluate the possible size of the outcrop, this dyke remains open both north west and south east over 180m in strike length and up to a width of 60m (Figure 2). A roadside chip sample traverse returned 10m @ 0.94% Li2O, the sample having been taken from where a side cut track supplied a continuous exposure of the soft weathered dyke.
A grab sample from a 4m wide outcrop was also taken some 20m south east of the road cutting; the sample shows 0.27% Li2O. Neither of the samples is considered representative of the full width of the dyke, no samples have been collected from the widest portion of the dyke further south east. The smooth, hard, rounded nature of the pegmatite in outcrop (Photograph 2) does not allow rapid assessment via chip sampling and will require a series of channel cut sample traverses to be established at regular intervals across the strike of the dyke, open over 180m (Figure 2).
It should be noted that assay results from small samples such as 2 – 10kg chip samples are unlikely to be highly representative of the average dyke material due to the coarse nature of the crystals that make up the pegmatite. The inherent coarse crystal size and random distribution of spodumene crystals can be considered as a nugget effect, meaning larger (bulk) samples may be necessary to better approximate true average grades. However, high density chip / channel samples and large diameter percussion drilling will greatly assist grade estimation with a larger sample dataset helping to reduce the nugget effect.
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Figure 2. Reconnaissance geological mapping and sampling – Eagle Pegmatite Dyke.
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PEGMATITE GEOCHEMISTRY AND MINERALISATION
Initial sampling of 13 individual dykes along the northern end of the Dorchap Dyke Swarm (within EL5315 – Mitta) has returned trace element assay data that plots on a fractionation trend line showing increasing fractionation from west to east (Graph 1 and Figure 3) across EL5315. While sample data comes from a very limited number of sample points (collected over a 12km strike length), the degree of fractionation (defined by the ratio of key elements Rubidium (Rb) and Cesium (Cs) against Potassium (K) - representing feldspar) is very well defined (Graph 1). The trend line (red line Graph 1) and the arrows in Figure 3 provide an exploration tool that can be used to focus field work into areas of highest prospectivity based on degree of fractionation (higher fractionation in pegmatites is more prospective for lithium, tin and tantalum mineralisation).
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----- Start of picture text -----
K/Rb Vs K/Cs (Fractionation Trend)
120.00
Fractionation Trend
100.00
WEST
80.00
60.00
EAST
40.00
20.00
0.00
0.00 500.00 1000.00 1500.00 2000.00 2500.00 3000.00 3500.00
K/Cs
K/Rb
----- End of picture text -----
Graph 1. Fractionation Trend line – 13 Pegmatite dykes within EL5315.
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Figure 3. Graduated symbol map of fractionation index (Ratio of K/Rb over K/Cs), northern Dorchap Dyke Swarm, larger symbols represent higher degree of fractionation, more prospective for Li, Sn and Ta.
4
Assay results from the preliminary sampling of 13 separate dykes (a total of 27 samples) in the northern portion of the Dorchap Dyke Swarm show highly encouraging results for lithium, rubidium, tantalum, caesium and tin. Samples collected within EL5315 show up to 4m @ 1.13% Li2O (Sample 68943) at a dyke within the Gosport group (Figure 1). Another highlight includes 10m @ 0.94% Li2O (Sample 68923) at the most northerly mapped point of the Eagle Dyke (Figure 2). Tin (Sn) can also be significant with up to 7.68% Sn from sample 68938 - Blair’s Dyke (See Appendix 1 – Full Assay Listing). Only 7 samples of the 27 submitted for assay were also submitted for mineral identification by XRD, this was considered adequate to assess the likely lithium mineral species hosted by the LCT dykes of the swarm. The remaining 20 samples may also contain spodumene with Li2O assay analysis up to 10m @ 0.94% from the Eagle Dyke, further XRD analysis will be conducted as exploration continues to establish any variation in mineral species along and across the dyke swarm.
PLANNED LITHIUM EXPLORATION
As exploration continues, dykes along the 60km long dyke swarm will be investigated through mapping, sampling and drilling. To date, only 13 dykes at the northern extent of the dyke swarm (within EL5315) have received preliminary investigation, representing a minute fraction of the known dykes near Eskdale. Only one dyke at the southern end of the dyke swarm (near Glen Wills - EL006277 – under application) has been sampled. Given the extent of the dyke swarm (some 60km by 15 km) it will be necessary to focus initial exploration into areas interpreted to exhibit the most favorable pegmatite geochemistry (higher fractionation).
The initial sampling of a small group of dykes from the northern extent of the swarm appears to be illustrating a fractionation trend from west to east, away from the Kiewa Shear Zone and high grade metamorphic terrain. The increasing fractionation trend is highly conducive to the concentration of Li, Cs, Ta and Sn into pegmatites and presents an exploration tool capable of guiding the program to focus in on the best possible dykes of the circa 1800 currently identified at the northern end of the swarm. The exploration tool needs to be refined and tested across the entire swarm, however the initial sampling has been very encouraging with up to 4m @ 1.13% Li2O from a dyke within the Gosport Group (EL5315).
TENEMENT APPLICATION
Dart have submitted a further exploration licence application (EL006486 - Mt Creek) in light of the recent encouraging assay results within EL5315. Subject to approval the new application will capture the final remaining portion of the Dorchap Dyke Swarm between the Eskdale EL006300 and Glen Wills EL006277 application areas, continuously covering some 60 km of strike along the dyke swarm – Figure 1.
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5
Tenement Status Report as at March 31 2017
Tenement applications EL006277 (Empress) and EL006300 (Eskdale) have proceeded through Native Title advertising as the final step toward grant in the statutory application processes. Application EL006486 was submitted 30 March and is subject to the approvals process.
Table 1. Tenement Status
| Tenement Number |
Name | Tenement Type | Area (Grats) Unless specified |
Interest | Interest Post‐ Completion of Tenement Acquisition5 |
Location | |
|---|---|---|---|---|---|---|---|
| EL4724 | Buckland2 | Exploration | 40 | 100% | NE Victoria | ||
| EL4726 | Dart1&2 | Exploration | 164 | 100% | NE Victoria | ||
| EL5058 | Cudgewa | Exploration | 216 | 100% | NE Victoria | ||
| EL5194 | Mt. Alfred | Exploration | 27 | 100% | NE Victoria | ||
| EL006277 | Empress | EL(Application) | ~220 | 100% | NE Victoria | ||
| EL006300 | Eskdale3 | EL(Application) | ~240 | 100% | NE Victoria | ||
| EL006486 | Mt Creek | EL(Application) | ~191 | 100% | NE Victoria | ||
| EL5468 | Upper Murray | Exploration | 148 | 100% | NE Victoria | ||
| ML5559 | Mt View2 | Mining | 4.8 Ha | 100% | NE Victoria | ||
| EL5315 | Mitta Mitta4 | Exploration | 195 | 50% JV | 100% | NE Victoria | |
| MIN5246 | Chinaman’s4 | Mining | 5 Ha | 50% JV | 100% | Central Victoria | |
| MIN5306 | Phoenix4 | Mining | 5 Ha | 50% JV | 100% | Central Victoria | |
| MIN5538 | Rushworth4 | Mining | 34.8 Ha | 50% JV | 100% | Central Victoria |
All tenements remain in good standing at 31 March 2017.
NOTE 1: Unicorn Project area subject to a 2% NSR Royalty agreement with BCKP Limited (Orion Mine Finance) dated 29 April 2013. NOTE 2: Areas subject to a 1.5% Founders NSR Royalty Agreement.
NOTE 3: Areas subject to a 1.0% NSR Royalty Agreement with Minvest Corporation Pty Ltd (See DTM ASX Release 1 June 2016). NOTE 4: Subject to Completion of a Mining Tenement Acquisition Agreement (see Note 5 below), these areas are subject to a 0.75% Net Smelter Royalty on gold production, payable to Bruce William McLennan NOTE 5: See Dart’s ASX Announcement “Acquisition of Tenement Package” dated 6 February 2017
REFERENCES
Cuffley, B. W., 1978. Exploration Licence 621. Essex Minerals Quarterly Technical Report, 1978
COMPETENT PERSONS STATEMENT
The information in this report that relates to Exploration Results is based on information compiled by Carl Swensson BSc.(Geol) Hons. a Competent Person who is a Member of the Australian Institute of Mining and Metallurgy. Mr Swensson is an independent consultant. Mr Swensson has sufficient experience that is relevant to the style of mineralisation and type of deposits 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” . Mr Swensson consents to the inclusion in the report of the matters based on his information in the form and context in which it appears.
6
GLOSSARY OF KEY TERMS
Lithium (Li). Lithium, which has the chemical symbol Li and an atomic number of 3, is the first metal in the periodic table. With a specific gravity of 0.534, it is about half as dense as water and the lightest of all metals. In its pure elemental form it is a soft, silvery-white metal, but it is highly reactive and therefore never is found as a metal in nature. Lithium has an average concentration of 20 parts per million in the Earth’s continental crust. Lithium has many uses, the most prominent being in batteries for cell phones, laptops, and electric and hybrid vehicles. Lithium is added to glasses and ceramics for strength and resistance to temperature change, it is used in heat-resistant greases and lubricants, and it is alloyed with aluminum and copper to save weight in airframe structural components.
Worldwide sources of lithium are broken down by ore-deposit type as follows: closed-basin brines, 58%; pegmatites and related granites, 26%; lithium-enriched clays, 7%; oilfield brines, 3%; geothermal brines, 3%; and lithium-enriched zeolites, 3% (2013 statistics). Pegmatites are a type of granite characterized by giant crystals of the common rock-forming minerals quartz, feldspar, and mica. A few pegmatites — termed “LCT ” — are enriched in the rare metals lithium, cesium, and tantalum, and it is these LCT pegmatites that are mined for lithium. The most important lithium ore mineral is spodumene. Source: Summary from http://pubs.usgs.gov/fs/2014/3035/
Lithium Oxide (Li2O). Lithium Oxide is the standard for reporting elemental lithium metal (see above) in analysis, the conversion applied for Li to Li2O is 2.152
Lepidolite. Lepidolite is a lilac-gray or rose-colored member of the mica group with formula K(Li,Al,Rb)3(Al,Si)4O10(F,OH)2 ~~.~~ It is a secondary source of lithium. It is a phyllosilicate mineral and a member of the polylithionite-trilithionite series. It is associated with other lithium-bearing minerals like spodumene in pegmatite bodies. It is one of the major sources of the rare alkali metals rubidium and caesium. It occurs in granite pegmatites, in some high-temperature quartz veins, greisens and granites. Associated minerals include quartz, feldspar, spodumene, amblygonite, tourmaline, columbite, cassiterite, topaz and beryl. Source: Edited from https://en.wikipedia.org/wiki/Lepidolite
Spodumene. Spodumene is a pyroxene mineral consisting of lithium aluminium inosilicate, LiAl(SiO3)2. Spodumene is an important source of lithium for use in ceramics, mobile phone and automotive batteries, medicine, Pyroceram and as a fluxing agent. Lithium is extracted from spodumene by fusing in acid. Source: Edited from https://en.wikipedia.org/wiki/Spodumene
Tantalum (Ta). Tantalum (Ta) is ductile, easily fabricated, highly resistant to corrosion by acids, and a good conductor of heat and electricity and has a high melting point. The major use for tantalum, as tantalum metal powder, is in the production of electronic components, mainly tantalum capacitors. Major end uses for tantalum capacitors include portable telephones, pagers, personal computers, and automotive electronics. Alloyed with other metals, tantalum is also used in making carbide tools for metalworking equipment and in the production of superalloys for jet engine components.
Source: Summary from http://minerals.usgs.gov/minerals/pubs/commodity/niobium/
Tantalum is estimated to make up about 1 ppm or 2 ppm of the Earth's crust by weight. There are many species of tantalum minerals, only some of which are so far being used by industry as raw materials: tantalite, microlite, wodginite, euxenite, polycrase. Tantalite (Fe, Mn)Ta2O6 is the most important mineral for tantalum extraction. The primary mining of tantalum is in Australia, where the largest producer, Global Advanced Metals, formerly known as Talison Minerals, operates two mines in Western Australia, Greenbushes in the Southwest and Wodgina in the Pilbara region. Source: Edited from https://en.wikipedia.org/wiki/Tantalum
Tantalum Oxide (Ta2O5). Tantalum Oxide is the standard for reporting elemental tantalum metal (see above) in analysis, the conversion applied for Ta to Ta2O5 is 1.2211
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APPENDIX 1. ASSAY LISTING
| Nb (ppm) P (ppm) Rb (ppm) Sn (ppm) Sn(ppm ‐ XRF05) Ta (ppm) Ta2O5 (ppm)** | 34.2 610 780 89.3 11.65 14.23 |
3.9 920 323 12.2 1.12 1.37 |
8.6 1520 127 15.2 2.21 2.70 |
44.5 1260 1780 203 221 47.00 57.39 |
69.9 2990 730 86.5 77 13.65 16.67 |
40.0 2820 700 44.7 44 6.56 8.01 |
74.4 1810 810 156.5 197 47.30 57.76 |
65.1 870 620 103.5 141 33.90 41.40 |
63.9 1860 710 166.5 948 36.60 44.69 |
72.0 1460 690 85.4 134 23.70 28.94 |
108.0 600 840 122.5 225 120.00 146.53 |
82.6 400 438 118.5 119 120.00 146.53 |
246.0 150 1310 440 78600 140.00 170.95 |
153.0 1120 890 164.5 1595 110.00 134.32 |
88.4 910 1000 204 1955 95.20 116.25 |
85.0 690 630 119.5 532 46.20 56.41 |
86.5 910 700 85.1 884 42.20 51.53 |
62.2 790 500 72.1 423 41.50 50.68 |
91.4 1120 356 100.5 167 59.80 73.02 |
90.0 2160 740 116.5 123 55.60 67.89 |
66.3 730 830 148.5 303 37.00 45.18 |
109.0 480 1650 310 3530 64.00 78.15 |
54.5 720 540 91.1 1075 38.70 47.26 |
157.5 810 740 119.5 1360 130.00 158.74 |
65.8 1510 940 119 124 51.10 62.40 |
77.2 1790 560 84.2 307 28.10 34.31 |
67.1 1200 460 110.5 112 42.30 51.65 |
JORC CODE, 2012 EDITION – TABLE 1 SECTION 1 SAMPLING TECHNIQUES AND DATA |
||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| XRD | Spodumene | Spodumene | Spodumene | Spodumene | Spodumene | Spodumene | Spodumene | |||||||||||||||||||||||||||
| **Li2O (%) *** | 0.94 | 0.00 | 0.01 | 0.02 | 0.06 | 0.04 | 0.02 | 0.27 | 0.01 | 0.20 | 0.01 | 0.02 | 0.01 | 0.03 | 0.02 | 1.13 | 0.21 | 0.01 | 0.01 | 0.01 | 0.01 | 0.02 | 0.47 | 0.01 | 0.02 | 0.00 | 0.03 | |||||||
| Li (ppm) | 4350.0 | 14.8 | 27.3 | 97.1 | 270.0 | 196.0 | 77.2 | 1260.0 | 66.2 | 930.0 | 57.5 | 93.9 | 55.9 | 124.0 | 114.5 | 5230.0 | 960.0 | 43.4 | 41.3 | 65.9 | 48.0 | 81.3 | 2190.0 | 57.6 | 98.3 | 5.7 | 135.5 | |||||||
| K (%) | 3.21 | 3.42 | 1.13 | 6.42 | 3.11 | 3.60 | 2.55 | 2.18 | 2.68 | 2.31 | 2.51 | 1.38 | 3.30 | 2.36 | 2.16 | 1.75 | 2.23 | 1.47 | 1.42 | 2.67 | 1.79 | 3.14 | 2.09 | 1.40 | 3.53 | 1.73 | 2.41 | |||||||
| Fe (%) | 0.52 | 0.38 | 0.43 | 0.56 | 1.04 | 0.93 | 0.81 | 0.68 | 0.58 | 0.49 | 0.44 | 0.47 | 0.51 | 0.36 | 0.38 | 0.69 | 0.31 | 0.41 | 0.42 | 0.47 | 0.59 | 0.48 | 0.37 | 0.45 | 0.66 | 0.73 | 0.49 | |||||||
| Cs (ppm) | 48.20 | 11.60 | 4.38 | 138.00 | 30.10 | 19.65 | 69.80 | 49.50 | 48.20 | 34.70 | 102.00 | 55.50 | 98.00 | 55.60 | 112.50 | 61.40 | 52.30 | 28.20 | 23.50 | 45.40 | 46.30 | 105.50 | 28.30 | 47.40 | 72.80 | 28.00 | 35.30 | |||||||
| Ca (%) | 0.01 | 0.07 | 0.04 | 0.08 | 0.18 | 0.09 | 0.09 | 0.04 | 0.21 | 0.09 | 0.02 | 0.02 | <0.01 | 0.09 | 0.05 | 0.02 | 0.06 | 0.03 | 0.09 | 0.13 | 0.02 | 0.01 | 0.04 | 0.06 | 0.15 | 0.13 | 0.12 | |||||||
| APPENDIX 1 ‐ KEY ASSAY DATA ‐ ALL SAMPLES | SampleID Site_ID NAT_Grid_ID Survey_Method Accuracy (m) NAT_East NAT_North NAT_RL Sample Type Be (ppm) |
68923 608481 MGA94_55 GPS 5 523924 5949230 1116 CHIP 29.9 |
68924 608482 MGA94_55 GPS 5 520159 5950872 632 GRAB 1.75 |
68925 608483 MGA94_55 GPS 5 520069 5951155 692 GRAB 4.62 |
68926 608484 MGA94_55 GPS 5 525970 5944603 1140 CHIP 38.9 |
68927 608485 MGA94_55 GPS 5 524504 5942813 1165 CHIP 7.11 |
68928 608486 MGA94_55 GPS 5 524340 5942688 1187 CHIP 4.08 |
68929 608487 MGA94_55 GPS 4 526812 5944854 938 CHIP 49.6 |
68930 608489 MGA94_55 GPS 6 523944 5949218 1109 CHIP 74.6 |
68932 608491 MGA94_55 GPS 12 526501 5948360 922 CHIP 45.8 |
68933 608492 MGA94_55 GPS 7 524593 5950425 991 GRAB 43.7 |
68936 608496 MGA94_55 GPS 5 527434 5953366 640 CHIP 16.1 |
68937 608495 MGA94_55 GPS 7 527430 5953361 635 GRAB 4.62 |
68938 608497 MGA94_55 GPS 6 526237 5954441 829 GRAB 85.5 |
68941 608500 MGA94_55 GPS 7 524813 5959400 946 GRAB 91.8 |
68942 608501 MGA94_55 GPS 8 523746 5953848 577 GRAB 142 |
68943 608504 MGA94_55 GPS 6 523716 5953071 700 CHIP 152.5 |
68944 608505 MGA94_55 GPS 9 523694 5953087 708 CHIP 104.5 |
68945 608506 MGA94_55 GPS 5 524226 5959573 930 CHIP 5.84 |
68946 608507 MGA94_55 GPS 6 524278 5959479 931 CHIP 13.65 |
68947 608510 MGA94_55 GPS 8 524235 5959794 891 GRAB 4.92 |
68948 608517 MGA94_55 GPS 8 525563 5959619 852 CHIP 11.75 |
68949 608520 MGA94_55 GPS 5 525570 5959587 851 GRAB 43.6 |
68951 608524 MGA94_55 GPS 5 526147 5954165 819 CHIP 112.5 |
68952 608525 MGA94_55 GPS 5 526104 5954207 821 GRAB 133.5 |
68953 608527 MGA94_55 GPS 8 524206 5949133 1123 CHIP 35.2 |
68954 608528 MGA94_55 GPS 5 525722 5947731 1018 GRAB 5.45 |
68955 608529 MGA94_55 GPS 4 523554 5948187 1087 CHIP 103.5 |
All analyses carried out by ME‐MS61 other than Sn as indicated by XRF05 ‐ ALS techniques. | NOTE * Li (ppm) to Li2O (ppm) calculated using a factor of 2.153 (expressed as a percentage) |
NOTE ** Ta (ppm) to Ta2O5 (ppm) calculated using a factor of 1.2211 (expressed in ppm) |
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| Criteria JORC Code explanation Commentary |
|
| Sampling techniques Nature and quality of sampling (e.g. cut channels, random chips, or specific specialised industry standard measurement tools appropriate to the minerals under investigation, such as down hole gamma sondes, or handheld XRF instruments, etc.). These examples should not be taken as limiting the broad meaning of sampling. Include reference to measures taken to ensure sample representivity and the appropriate calibration of any measurement tools or systems used. Aspects of the determination of mineralisation that are Material to the Public Report. In cases where ‘industry standard’ work has been done this would be relatively simple (e.g. ‘reverse circulation drilling was used to obtain 1 m samples from which 3 kg was pulverised to produce a 30 g charge for fire assay’). In other cases more explanation may be required, such as where there is coarse gold that has inherent sampling problems. Unusual commodities or mineralisation types (e.g. submarine nodules) may warrant disclosure of detailed information. Chip samples are taken continuously across the general strike of pegmatites in outcrop, large samples (4 – 10kg) are taken where possible to take a more representative sample of the large crystals in the pegmatites. The chip samples are of adequate quality to be indicative of the small area sampled. Grab samples were collected from the outcrop over a small area (<1 – 5m in diameter). The grab samples are generally small (ie. <10kg) and represent the local area only, sampling only tests a small aerial extent. The samples of pegmatite are not considered as being representative of the dyke on mass. The grab samples are of adequate quality to be representative of the small area sampled and reflect the sampled insitu mineralisation. |
|
| Drilling techniques Drill type (e.g. core, reverse circulation, open-hole hammer, rotary air blast, auger, Bangka, sonic, etc.) and details (e.g. 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.). NA |
|
| Drill sample recovery Method of recording and assessing core 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 preferential loss/gain of fine/coarse material. NA |
|
| Logging Whether core and chip samples have been geologically and geotechnically logged to a level of detail to support appropriate Mineral Resource estimation, mining studies and metallurgical studies. Whether logging is qualitative or quantitative in nature. Core (or costean, channel, etc.) photography. The total length and percentage of the relevant intersections logged. Chip / Grab samples were logged for qualitative mineral percentages, mineral species and habit and each sample is photographed and its location recorded. |
|
| Sub‐sampling techniques and sample preparation If core, whether cut or sawn and whether quarter, half or all core taken. If non-core, whether riffled, tube sampled, rotary split, etc. and whether sampled wet or dry. For all sample types, the nature, quality and appropriateness of the sample preparation technique. Quality control procedures adopted for all sub-sampling stages to maximise representivity of samples. Measures taken to ensure that the sampling is representative of the in situ material collected, including Individual <10kg chip / grab samples were collected from outcrop, individual chips making up the sample were <40mm and chipped from a random selection of the mineralisation to generate a representative average sample of the mineralisation targeted. The <10kg sample size is |
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| Criteria | JORC Code explanation | Commentary | ||
| for instance results for field duplicate/second-half | considered appropriate to test | |||
| sampling. | the mineralisation for the | |||
| Whether sample sizes are appropriate to the grain size | presence of lithium and | |||
| of the material being sampled. | associated elements. The | |||
| sample is considered suitable | ||||
| for the purposes of estimating | ||||
| the magnitude of lithium within | ||||
| the mineralisation at a local | ||||
| scale only and not as a sample | ||||
| representative of the wider | ||||
| area of the pegmatite dyke on | ||||
| average. | ||||
| The whole sample was | ||||
| crushed and pulverised prior to | ||||
| sub-sampling at the laboratory | ||||
| via riffle splitting. | ||||
| Sampling was conducted at a | ||||
| reconnaissance level and no | ||||
| duplicate grab samples were | ||||
| collected. | ||||
| The sample size is smaller | ||||
| than ideal when compared to | ||||
| the grain size of the pegmatite | ||||
| crystals and any lithium | ||||
| mineralisation observed at | ||||
| outcrop. The pegmatite dyke | ||||
| shows considerable grain size | ||||
| variability and possible | ||||
| zonation of mineralisation. | ||||
| Quality of | The nature, quality and appropriateness of the assaying | Chip and Grab samples were |
||
| assay data and laboratory tests |
and laboratory procedures used and whether the technique is considered partial or total. For geophysical tools, spectrometers, handheld XRF instruments, etc., the parameters used in determining the analysis including instrument make and model, |
submitted to ALS Chemex and analysed for a suit of trace elements using ALS Methods ME-MS61 (A four-acid digest is performed on 0.25g of sample |
||
| reading times, calibrations factors applied and their | to quantitatively dissolve most | |||
| derivation, etc. | geological materials). Analysis | |||
| Nature of quality control procedures adopted (e.g. | was via ICP-MS + ICP-AES | |||
| standards, blanks, duplicates, external laboratory | and for over limit elements Cs, | |||
| checks) and whether acceptable levels of accuracy (i.e. | Rb and Ta by ALS method ME- |
|||
| lack of bias) and precision have been established. | MS85 (lithium borate fusion | |||
| and ICP-MS) for quantitative | ||||
| results of all elements, | ||||
| including those encapsulated in | ||||
| resistive minerals. These | ||||
| techniques are appropriate and | ||||
| considered a total extraction | ||||
| technique. | ||||
| Due to the reconnaissance | ||||
| nature of the sampling, no | ||||
| QAQC procedures were | ||||
| adopted other than internal | ||||
| laboratory CRM. | ||||
| Sn has also been analysed by | ||||
| XRF using ALS Method XRF05 | ||||
| due to potential for partial | ||||
| digestion. | ||||
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| Criteria JORC Code explanation Commentary |
|
| Verification of sampling and assaying The verification of significant intersections by either independent or alternative company personnel. The use of twinned holes. Documentation of primary data, data entry procedures, data verification, data storage (physical and electronic) protocols. Discuss any adjustment to assay data. No verification process or independent review of assay data has been carried out. Chip / Grab samples were geologically logged, photographed in the field and entered into the company database from hard copy field sheets for long term electronic storage. Lithium analysis reports Li%, Li2O (%) is derived by using a conversion factor: Li2O = Li x 2.153 Tantalum analysis reports Ta (ppm) Ta2O5(ppm) is derived by using a conversion factor: Ta2O5= Ta x 1.2211 |
|
| Location of data points Accuracy and quality of surveys used to locate drill holes (collar and down-hole surveys), trenches, mine workings and other locations used in Mineral Resource estimation. Specification of the grid system used. Quality and adequacy of topographic control. The location of the chip / grab samples and geological mapping used a Trimble GPS using the MGA94 Grid Datum (Zone 55) with topographic control taken from the GPS. Accuracy is variable but maintained <5m during the mapping process with constant visual quality assessment conducted. |
|
| Data spacing and distribution Data spacing for reporting of Exploration Results. Whether the data spacing and distribution is sufficient to establish the degree of geological and grade continuity appropriate for the Mineral Resource and Ore Reserve estimation procedure(s) and classifications applied. Whether sample compositing has been applied. Chip / Grab samples are not presented or considered to be representative of the pegmatites average grade. Grab samples only represent the grade at a single point within the mineralisation. |
|
| Orientation of data in relation to geological structure Whether the orientation of sampling achieves unbiased sampling of possible structures and the extent to which this is known, considering the deposit type. If the relationship between the drilling orientation and the orientation of key mineralised structures is considered to have introduced a sampling bias, this should be assessed and reported if material. As above, Grab samples do not capture any aspect of the potential variation in grade in relation to the orientation of the mineralisation and represents only a single point inside the mineralisation. Chip samples are collected perpendicular to strike where possible to avoid anysample bias. |
|
| Sample security The measures taken to ensure sample security. All samples submitted for analysis are placed in sealed plastic bags and enclosed in strong plastic boxes, delivered to a commercial transport company for delivery to the laboratory. Any evidence of sample damage or tampering is immediately reported by the laboratory to the company and a decision made as to the integrityof the sample and the |
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| Criteria JORC Code explanation Commentary |
|
| remaining samples within the damaged / tampered bag/s. |
|
| Audits or reviews The results of any audits or reviews of sampling techniques and data. The mapping and sampling methodology and results were documented and supplied to an independent expert who acts as the competent person for this report. |
SECTION 2 REPORTING OF EXPLORATION RESULTS
| SECTION 2 REPORTING OF EXPLORATION RESULTS | ||||||||
|---|---|---|---|---|---|---|---|---|
| Criteria JORC Code explanation |
Commentary | |||||||
| Mineral tenement and land tenure status Type, reference name/number, location and ownership including agreements or material issues with third parties such as joint ventures, partnerships, overriding royalties, native title interests, historical sites, wilderness or national park and environmental settings. 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. |
Tenement Number |
Name | Tenement Type |
Area (Grats) Unless specified |
Interest | Interest Post‐ Completion of Tenement Acquisition5 |
Location | |
| EL4724 | Buckland2 | Exploration | 40 | 100% | NE Victoria |
|||
| EL4726 | Dart1&2 | Exploration | 164 | 100% | NE Victoria |
|||
| EL5058 | Cudgewa | Exploration | 216 | 100% | NE Victoria |
|||
| EL5194 | Mt. Alfred | Exploration | 27 | 100% | NE Victoria |
|||
| EL006277 | Empress | EL (Application) |
~220 | 100% | NE Victoria |
|||
| EL006300 | Eskdale3 | EL (Application) |
~240 | 100% | NE Victoria |
|||
| EL006486 | Mt Creek | EL (Application) |
~191 | 100% | NE Victoria |
|||
| EL5468 | Upper Murray | Exploration | 148 | 100% | NE Victoria |
|||
| ML5559 | Mt View2 | Mining | 4.8 Ha | 100% | NE Victoria |
|||
| EL5315 | Mitta Mitta4 | Exploration | 195 | 50% JV | 100% | NE Victoria |
||
| MIN5246 | Chinaman’s4 | Mining | 5 Ha | 50% JV | 100% | Central Victoria |
||
| MIN5306 | Phoenix4 | Mining | 5 Ha | 50% JV | 100% | Central Victoria |
||
| MIN5538 | Rushworth4 | Mining | 34.8 Ha | 50% JV | 100% | Central Victoria |
||
| All tenements remain in good standing at 31 March 2017. NOTE 1:Unicorn Project area subject to a 2% NSR Royalty agreement with BCKP Limited (Orion Mine Finance) dated 29 April 2013. NOTE 2:Areas subject to a 1.5% Founders NSR Royalty Agreement. NOTE 3:Areas subject to a 1.0% NSR Royalty Agreement with Minvest Corporation Pty Ltd (See DTM ASX Release 1 June 2016). NOTE 4:Subject to Completion of a Mining Tenement Acquisition Agreement (see Note 5 below), these areas are subject to a 0.75% Net Smelter Royalty on gold production, payable to Bruce William McLennan NOTE 5:See Dart’s ASX Announcement “Acquisition of Tenement Package” dated 6 February 2017 |
||||||||
| Exploration done by other parties Acknowledgment and appraisal of exploration by other parties. |
No commercial exploration for Li has previously occurred, geological investigations as part of academic research has been reported for the pegmatite dykes of the area in: Eagle, R. M., 2009. Petrology, petrogenesis and mineralisation of granitic pegmatites of the Mount Wills District, northeastern Victoria. Unpublished thesis, University of Ballarat. Eagle, R. M., Birch, W. D & McKnight, S., 2015. Phosphate minerals in granitic pegmatites from the Mount Wills district, northeastern Victoria. Royal Society of Victoria. 127:55‐68. Previous exploration in the district has focussed on gold exploration at Glen Wills and historic Sn |
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| production from pegmatite dykes. | |
| Geology Deposit type, geological setting and style of mineralisation. The lithium mineralisation reported is hosted within highly evolved, late tectonic peraluminous granite pegmatites of the complex Lithium, Caesium, Tantalum (LCT) class. These dykes are thought to be distal to a source granitic body and are present as lenticular, discontinuous bodies of variable length and width (up to many hundreds of metres in length and tens of metres in width). Lithium mineralisation within the pegmaties is poorly understood at this early exploration stage but suspected to be spatially related to the zonation within the complex pegmatites. Lithium mineralisation observed to date appears to be as spodumene – Cassiterite is also evident within the dyke. |
|
| Drill hole Information A summary of all information material to the understanding of the exploration results including a tabulation of the following information for all Material drill holes: o easting and northing of the drillhole collar o elevation or RL (Reduced Level– elevation above sea level in metres) of the drill hole collar o dip and azimuth of the holeo down hole length andinterception 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. NA |
|
| Data aggregation methods In reporting Exploration Results, weighting averaging techniques, maximum and/or minimum grade truncations (e.g. cutting of high grades) and cut-off grades are usually Material and should be stated. Where aggregate intercepts incorporate short lengths of 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. NA |
|
| Relationship between mineralisation These relationships are particularly important in the reporting of Exploration Results. NA |
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| widths and | If the geometry of the mineralisation | |||
| intercept lengths |
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 (e.g. ‘down hole length, true | ||||
| _width not known’). _ | ||||
| Diagrams | Appropriate maps and sections (with | NA | ||
| scales) and tabulations of 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 | NA | ||
| reporting | all Exploration Results is not practicable, representative reporting |
|||
| of both low and high grades and/or | ||||
| widths should be practiced to avoid | ||||
| misleading reporting of Exploration | ||||
| Results. | ||||
| Other | Other exploration data, if meaningful | Any other relevant information is discussed in the | ||
| substantive | and material, should be reported | main body of the report. | ||
| exploration data |
including (but not limited to): geological observations; geophysical survey results; |
|||
| geochemical survey results; bulk | ||||
| samples – size and method of | ||||
| treatment; metallurgical test results; | ||||
| bulk density, groundwater, | ||||
| geotechnical and rock | ||||
| characteristics; potential deleterious | ||||
| or contaminating substances. | ||||
| Further work | The nature and scale of planned | Planned work is discussed in the body of the report | ||
| further work (e.g. tests for lateral | and is dependent on future company direction. | |||
| extensions or depth extensions or | ||||
| large-scale step-out drilling). | ||||
| Diagrams clearly highlighting the | ||||
| areas of possible extensions, | ||||
| including the main geological | ||||
| interpretations and future drilling | ||||
| areas, provided this information is | ||||
| not commercially sensitive. | ||||
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