26th Oct 2015 09:48
26 OCTOBER 2015
| AIM/ASX Code: WHE
|
WILDHORSE ENERGY LIMITED SEPTEMBER 2015 QUARTERLY REPORT |
The Board of Wildhorse Energy Limited (the "Company" or "Wildhorse") presents its September 2015 quarterly report.
Highlights during, and subsequent to, the quarter include:
Ø The Company completed a shallow core drilling program at the Lake Wells Project, which confirmed that the brine saturated sediment across the Lake is at least 20 metres deep in most areas, with excellent porosity and brine chemistry for estimating a substantial initial resource. The program has also produced a comprehensive set of intact core and brine samples for geological interpretation, aquifer modelling and ongoing chemical analysis.
Highlights of the program include:
· Average depth achieved of 16 metres. Only 2 out of 32 holes appear to have encountered basement rocks.
· A zone of saturated coarser-grained evaporite sediments within the upper 3-4 metres of the Lake bed have been encountered in most drill holes in the program.
· All brine chemistry and porosity assay data have been received for the program with highly encouraging porosity results (average 46.4% v/v) and brine chemistry (average K: 4,012 mg/L and S04: 19,037 mg/L).
Ø Modelling and estimation of an initial JORC resource for the shallow portion of Lake Wells is underway.
Ø The Company has mobilised an aircore rig to test the deeper brine resource potential of the Lake. Results of this campaign will be announced in coming weeks.
Lake Wells Project
The Lake Wells Project comprises 522 km2 of granted Exploration Licences, substantially covering the Lake Wells Playa, as well as 604 km2 of Exploration Licence Applications, immediately contiguous to Lake Wells.
Lake Wells was the subject of reconnaissance drilling and sampling by the previous owner (see ASX announcement dated 9 April 2015). This work identified extensive, shallow, highly concentrated brines at Lake Wells with the potential for resources across the entire lake area considered suitable for producing fertiliser quality Sulphate of Potash (SOP - K2SO4) and other salt products.
The 2015 shallow drilling program, completed during August and September, was designed to test the lateral extent of brine in the lakebed sediments to a targeted drilling depth of approximately 20 metres.
The drill program utilised a lightweight auger rig capable of drilling hollow core to the targeted depth. This drill rig was towed by a tracked LandTamer amphibious vehicle with Argo vehicles providing support.
Hollow-core auger is a drilling technique suited to take samples from unconsolidated sediments in a similar manner to diamond drilling. The majority of the cores recovered during this drilling campaign were intact core which allowed for the completion of a range of analysis to support the estimation of brine resources. The drilling at Lake Wells recovered intact sediment cores in 0.75 metre long clear tubing, with the exception of holes LWG019, LWG051 and LWG052 where split cores were obtained for future reference.
After recovery from the drill string, the intact core tubes were immediately capped and sealed to retain the moisture and structure of the sediments. The cores were visually logged and the intervals for determination of porosity and entrained brine analysis marked up before dispatch to laboratory in Perth. The porosity determinations were performed in the lab for 0.1m lengths (core slices) at every 3 metre down each hole; likewise, the entrained brine analysis was performed on 0.1 metre core slices from representative lithological units, down each hole (typically 3 - 4 samples per hole).
On the completion of each hole, the drill hole was purged and a brine sample was collected using a downhole pump. The brine samples, along with the marked-up cores, were then despatched to Perth for laboratory analysis. The core samples were subjected to porosity determination by a gravimetric method (oven drying) and conversion to a volume / volume porosity using measured particle density values. Pore solutions for pre-determined core intervals for Entrained Brine analysis were obtained using a high speed centrifuge. Both the Entrained Brine and the bulk water samples were analysed for the same suite of major ions using ICP-AES, with chloride determined by Mohr titration and alkalinity determined volumetrically. Sulphate was calculated from the ICP-AES sulphur analysis. The analytical results were internally checked and then compiled in single data set for use in the estimation of a JORC compliant resource.
Brine analysis was undertaken by Bureau Vertitas Metallurgical Laboratory in Perth, and duplicate samples were submitted to Intertek Minerals Laboratory in Perth. Reference standard solutions were procured and sent to both laboratories. Inter-laboratory duplicate analysis reported a potassium concentration difference between duplicate pairs ranging from 1.2% to 2.2%. Analysis of reference standard solutions reported a potassium concentration error ranging from -0.5% to 0.7% (Primary Lab) and -2.1% to -1.7% (Secondary Lab) from the reference concentration.
Drill Program
A total of 32 hollow-core auger drill holes have been completed for a total of 504 metres of drilling. Of these 32 holes, 29 holes recovered intact core totalling 465 metres, and 3 holes recovered split core totalling 38m. The hole depths ranged from 1.5m to 22.95m with the average depth being approximately 16m (Appendix 1). The majority of holes ended in brine saturated sediment and therefore are effectively open at depth.
In the northern arm of the lake, two holes two holes, LWG007 and LWG024, appear to have encountered shallow basement, interpreted as Proterozoic meta-sediments, at 6.8m and 6.75m below lake surface, respectively.
To the west of hole LWG007, drilling encountered very stiff, clays and so holes were terminated at shallower depths without encountering basement. Within this area, hole LWG004 was equipped with slotted PVC casing to allow future monitoring of water levels, flow rates and brine chemistry.
The large area of the lake between LWG007 and LWG023 was drilled to an average depth of 19m, with a reasonably uniform sediment profile and all holes finishing in saturated sediments and effectively open at depth. LWG014 was equipped with slotted PVC casing to allow future monitoring of water levels, flow rates and brine chemistry.
In the southern arm of the lake, most holes encountered a similar sedimentary profile to the northern arm, finishing in saturated sediments at an average depth of 16m, and effectively open at depth.
Holes LWG025 and LWG026 were drilled in a distinctly coarser grained sedimentary zone of the lake, identified in the drilling program by the previous operator. Here, gypsiferous sand is the dominant lithology from surface to depth. Both holes recorded gypsiferous quartz sand interbedded with silt down to 4m. LWG026 was equipped with slotted PVC casing to allow future monitoring of water levels, flow rates and brine chemistry.
Holes LWG021, LWG031 and LWG035 were drilled on islands within the lake playa to test geological continuity beneath the islands, and to assess the impact of islands on brine chemistry. The data demonstrates that the islands are a surficial feature, and the shallow stratigraphic sequence is continuous beneath the islands. Shallow (0-10m depth) brine beneath the islands exhibits lower concentration (Average 2,000 mg/L K) compared to the Lake. A deeper brine sample from 14 m depth reports a higher concentration of 4,280 mg/L K indicating that the dilution effect is limited in depth. Additional samples at depth are being analysed. This is a phenomenon recorded from salt lakes in the Yilgarn Block and elsewhere in Australia.
Brine Analysis
Brine analysis has been completed on bulk water samples pumped from 30 holes on completion of each hole. Of the 28 holes for which intact core was recovered, brine analysis has been completed on 57 entrained brine samples. The average brine chemistry for all 87 water samples is set out in Table 1 below and full data is provided under Appendix 2.
HOLE ID | K (mg/L) | Cl (mg/L) | Na (mg/L) | Ca (mg/L) | Mg (mg/L) | SO4 (mg/L) | TDS (mg/L) |
Average of 87 samples | 4,012 | 145,753 | 88,273 | 616 | 6,973 | 19,037 | 264,664 |
Table 1: Major Element Chemistry of Bulk Water and Entrained Brine Samples from Lake Wells
The above brine analysis results, together with the wide aerial extent of drilled area in the northern and southern arms of the lake, clearly point to presence of a substantial volume of highly concentrated brine pool within the near-surface sedimentary fill of the Lake Wells. Equally important, this brine pool is characterised by elevated concentration of potassium, magnesium and sulphate elements and distinctly deficient in calcium ion. Such a chemical makeup is considered highly favourable for efficient recovery of SOPM from the lake brines (the main feedstock for SOP fertiliser production), using conventional evaporation methods.
It should be noted that this leg of the exploration program was limited to auger drilling down to 20 metre below the lake surface, and that the vast majority of the drill holes finished in saturated sediments. Accordingly, this vast near-source brine pool is effectively open at depth.
Sediment Porosity
All results of the porosity data returned from the laboratory are currently being reviewed and assessed. There has been no previous porosity test work on the project and the results to date have been very encouraging. From the 144 samples analysed to date, the average porosity value is 46.4%, with a low of 31.2% and a high of 63.7% (Appendix 3).
These results, once finalised, will be used to determine the in-situ brine volumes that will support the resource estimates.
Ongoing Exploration
An aircore drilling program commenced in late September aimed at testing the deeper brine resource potential of the Lake and studying the deeper sediment and basement geology. Results are expected to be available in the coming weeks. An evaporation trial program has been prepared for implementation following the collection of bulk samples during the aircore drilling program.
Other Projects
Wildhorse also holds exploration licences and/or applications covering all or parts of Lake Irwin and Lake Minigwal and Lake Ballard in Western Australia, Lake Lewis in the Northern Territory and Lake Macfarlane and Island Lagoon in South Australia.
The Company is compiling and assessing available data on these properties to allow an initial assessment of their prospectively for large scale Sulphate of Potash production from brines.
Golden Eagle Uranium and Vanadium Project
The Golden Eagle Uranium and Vanadium Project holds nine U.S. Department of Energy (DOE) Uranium/Vanadium Mining Leases, covering 22.7 km2 located in the Uravan Mineral Belt, Colorado USA.
Technical reports for a number of the lease have been drafted based on historic data, however, exploration drilling and core analysis need to be completed in order to finalise these reports. The leases will expire eight years after the courts complete their review of the Record of Decision (ROD) published in 2014 in the Federal Register and the DOE allows the lease holders to resume activates on their leases.
Wildhorse also possess an option on Gold Eagle Mining Inc. (GEMI) leases; GEMI has three DOE properties of which two have active operating permits.
The Company has commenced a technical review of existing exploration information and is now focusing on establishing the project's scales and potential for exploration upside.
Mecsek Hills Uranium Project
Subsequent to the quarter, Wildhorse disposed of its residual exploration interest in Hungary. This was achieved through the sale of the Company's Hungarian subsidiary, Wildhorse Energy Hungary Kft, in exchange for a 1.5% Net Sales Royalty in the Mecsek Hills Uranium Project, and allows management to focus on the development of the SOP Potash and Golden Eagle Uranium Projects.
Table 2 - Summary of Exploration and Mining Tenements
As at 30 September 2015, the Company holds interests in the following tenements:
Australian Projects:
Project | Status | License Number | Area (km2) | Term | Grant Date | Date of First Relinquish-ment | Interest (%) 1-Jul-15 | Interest (%) 30-Sep-15 | |||||
Western Australia | |||||||||||||
Lake Wells | |||||||||||||
Central | Granted | E38/2710 | 192.2 | 5 years | 05-Sep-12 | 4-Sep-17 | 100% | 100% | |||||
South | Granted | E38/2821 | 131.5 | 5 years | 19-Nov-13 | 18-Nov-18 | 100% | 100% | |||||
North | Granted | E38/2824 | 198.2 | 5 years | 04-Nov-13 | 3-Nov-18 | 100% | 100% | |||||
Outer East | Application | E38/3055 | 298.8 | - | - | - | 100% | 100% | |||||
Single Block | Application | E38/3056 | 3.0 | - | - | - | 100% | 100% | |||||
Outer West | Application | E38/3057 | 301.9 | - | - | - | 100% | 100% | |||||
Lake Ballard | |||||||||||||
West | Granted | E29/912 | 607.0 | 5 years | 10-Apr-15 | 10-Apr-20 | 100% | 100% | |||||
East | Granted | E29/913 | 73.2 | 5 years | 10-Apr-15 | 10-Apr-20 | 100% | 100% | |||||
North | Granted | E29/948 | 94.5 | 5 years | 22-Sep-15 | 21-Sep-20 | 100% | 100%* | |||||
South | Application | E29/958 | - | - | - | - | - | 100% | |||||
Lake Irwin | |||||||||||||
West | Application | E37/1233 | 573.4 | - | - | - | 100% | 100% | |||||
Central | Application | E39/1892 | 145.9 | - | - | - | - | 100% | |||||
East | Application | E38/3087 | 212.8 | - | - | - | - | 100% | |||||
Lake Marmion | |||||||||||||
Central | Application | E29/952 | 201.3 | - | - | - | 100% | 100% | |||||
Lake Minigwal | |||||||||||||
West | Application | EL 39/1893 | 246.2 | - | - | - | - | 100% | |||||
East | Application | EL 39/1894 | 158.1 | - | - | - | - | 100% | |||||
South Australia | |||||||||||||
Lake Macfarlane | Application | EL 2015/085 | 816 | - | - | - | 100% | 100% | |||||
Island Lagoon | Application | EL 2015/084 | 978 | - | - | - | 100% | 100% | |||||
Northern Territory | |||||||||||||
Lake Lewis | |||||||||||||
South | Granted | EL 29787 | 146.4 | 6 year | 08-Jul-13 | 7-Jul-19 | 100% | 100% | |||||
North | Granted | EL 29903 | 125.1 | 6 year | 21-Feb-14 | 20-Feb-19 | 100% | 100% | |||||
*Application granted during quarter
Other Projects:
Location | Name | Resolution Number | Percentage Interest |
Hungary | Pécs | PBK/6947/3/2006 | 100% |
USA - Colorado | C-SR-10 | C-SR-10 | 80% |
USA - Colorado | C-JD-5A | C-JD-5A | 80% |
USA - Colorado | C-SR-11A | C-SR-11A | 80% |
USA - Colorado | C-SR-15A | C-SR-15A | 80% |
USA - Colorado | C-SR-16 | C-SR-16 | 80% |
USA - Colorado | C-WM-17 | C-WM-17 | 80% |
USA - Colorado | C-LP-22A | C-LP-22A | 80% |
USA - Colorado | C-LP-23 | C-LP-23 | 80% |
Competent Persons Statement
The information in this report that relates to Exploration Results for Lake Well's drill program is based on information compiled by Mr Ben Jeuken, who is a member Australian Institute of Mining and Metallurgy and the International Association of Hydrogeologists. Mr Jeuken is employed by Groundwater Science Pty Ltd, an independent consulting company. Mr Jeuken 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 2012 Edition of the 'Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves'. Mr Jeuken consents to the inclusion in the report of the matters based on his information in the form and context in which it appears.
APPENDIX 1 - Lake Wells Project Auger Drill Hole Collar and Survey Details
HOLE ID | EOH | SWL | EAST | NORTH | RL | Dip | Azimuth |
LWG001 | 8.75 | 0.3 | 503281 | 7050948 | 447 | -90 | 0 |
LWG003 | 1.5 | - | 504840 | 7046721 | 445 | -90 | 0 |
LWG004 | 7.25 | 0.3 | 506205 | 7050557 | 446 | -90 | 0 |
LWG007 | 6.75 | 0.7 | 511841 | 7049619 | 441 | -90 | 0 |
LWG008 | 16.75 | 0.5 | 516722 | 7048077 | 446 | -90 | 0 |
LWG009 | 17.25 | 0.6 | 517757 | 7049815 | 429 | -90 | 0 |
LWG010 | 19.8 | 0.3 | 518727 | 7051540 | 441 | -90 | 0 |
LWG012 | 22.95 | 0.6 | 520923 | 7045358 | 442 | -90 | 0 |
LWG014 | 20.25 | 0.6 | 522074 | 7047346 | 432 | -90 | 0 |
LWG015 | 18.25 | 0.7 | 523195 | 7049252 | 435 | -90 | 0 |
LWG017 | 20.25 | 0.3 | 525119 | 7043218 | 441 | -90 | 0 |
LWG018 | 19.5 | 0.2 | 526519 | 7045037 | 441 | -90 | 0 |
LWG019 | 20.5 | 0.6 | 529088 | 7039485 | 443 | -90 | 0 |
LWG020 | 20.25 | 0.6 | 530095 | 7041226 | 443 | -90 | 0 |
LWG021 | 15.75 | 1.7 | 531719 | 7035328 | 442 | -90 | 0 |
LWG022 | 20.65 | 0.5 | 534310 | 7038541 | 440 | -90 | 0 |
LWG023 | 20.85 | 0.4 | 534149 | 7031928 | 444 | -90 | 0 |
LWG024 | 6.75 | 0.5 | 535893 | 7026879 | 444 | -90 | 0 |
LWG025 | 18.75 | 0.3 | 528436 | 7017175 | 438 | -90 | 0 |
LWG026 | 18.3 | 0.4 | 532008 | 7019067 | 441 | -90 | 0 |
LWG027 | 16.4 | 0.5 | 535921 | 7022247 | 442 | -90 | 0 |
LWG028 | 18.45 | 1.2 | 532393 | 7013339 | 442 | -90 | 0 |
LWG029 | 18.25 | 0.4 | 536085 | 7016679 | 442 | -90 | 0 |
LWG030 | 19.9 | 0.5 | 539200 | 7020066 | 445 | -90 | 0 |
LWG031 | 20.4 | 2.3 | 536007 | 7010114 | 444 | -90 | 0 |
LWG032 | 16.5 | 0.4 | 537781 | 7005827 | 442 | -90 | 0 |
LWG033 | 12.2 | 0.3 | 539880 | 7001764 | 442 | -90 | 0 |
LWG034 | 7.1 | 0.4 | 536684 | 6998577 | 439 | -90 | 0 |
LWG035 | 14.6 | - | 542903 | 6997671 | 442 | -90 | 0 |
LWG050 | 21 | 0.6 | 529088 | 7039483 | 443 | -90 | 0 |
LWG051 | 17.75 | 0.3 | 525112 | 7043218 | 440 | -90 | 0 |
APPENDIX 2 - Bulk Water Samples Chemical Analysis Results
HOLE ID | From (m) | To (m) | K (mg/L) | Cl (mg/L) | Na (mg/L) | Ca (mg/L) | Mg (mg/L) | SO4 (mg/L) | TDS (mg/L) |
LWG001 | 0 | 8.8 | 3,770 | 134,400 | 82,900 | 476 | 7,250 | 24,000 | 252,796 |
LWG004 | 0 | 7.3 | 4,070 | 153,900 | 88,400 | 464 | 7,930 | 22,000 | 276,764 |
LWG007 | 0 | 5.8 | 4,030 | 147,200 | 86,900 | 499 | 7,600 | 21,000 | 267,229 |
LWG008 | 0 | 16.8 | 3,570 | 142,400 | 84,300 | 540 | 7,370 | 19,000 | 257,180 |
LWG009 | 0 | 17.3 | 4,150 | 151,550 | 94,300 | 495 | 7,210 | 21,000 | 278,705 |
LWG010 | 0 | 19.8 | 4,330 | 154,850 | 98,900 | 508 | 6,790 | 21,000 | 286,378 |
LWG012 | 0 | 23.0 | 3,970 | 148,800 | 88,100 | 513 | 7,060 | 20,000 | 268,443 |
LWG014 | 0 | 20.3 | 4,245 | 146,900 | 89,350 | 519 | 7,240 | 22,000 | 270,254 |
LWG015 | 0 | 18.3 | 4,620 | 158,300 | 96,000 | 512 | 7,140 | 21,000 | 287,572 |
LWG017 | 0 | 20.3 | 4,220 | 150,200 | 91,300 | 432 | 6,580 | 24,000 | 276,732 |
LWG018 | 0 | 19.5 | 4,910 | 135,800 | 83,300 | 767 | 5,290 | 17,000 | 247,067 |
LWG019 | 0 | 20.5 | 4,150 | 145,300 | 90,100 | 536 | 7,290 | 20,000 | 267,376 |
LWG020 | 0 | 20.3 | 4,000 | 144,500 | 89,500 | 483 | 7,150 | 23,000 | 268,633 |
LWG021 | 0 | 15.8 | 4,070 | 135,550 | 83,600 | 568 | 5,930 | 19,000 | 248,718 |
LWG022 | 0 | 20.7 | 3,600 | 151,500 | 92,800 | 550 | 8,380 | 21,000 | 277,830 |
LWG023 | 0 | 20.9 | 3,820 | 134,650 | 82,200 | 674 | 5,490 | 17,000 | 243,834 |
LWG024 | 0 | 6.8 | 4,860 | 152,800 | 95,100 | 529 | 5,540 | 19,000 | 277,829 |
LWG025 | 0 | 3.8 | 4,740 | 143,500 | 84,000 | 606 | 5,140 | 17,000 | 254,986 |
LWG026 | 0 | 18.3 | 4,030 | 134,500 | 75,700 | 682 | 5,360 | 16,000 | 236,272 |
LWG027 | 0 | 16.4 | 3,540 | 154,750 | 90,700 | 529 | 8,580 | 19,000 | 277,099 |
LWG028 | 0 | 6.0 | 3,460 | 146,850 | 84,900 | 640 | 6,630 | 17,000 | 259,480 |
LWG029 | 0 | 18.3 | 3,690 | 115,950 | 65,700 | 847 | 4,380 | 14,000 | 204,567 |
LWG030 | 0 | 19.9 | 3,500 | 150,650 | 86,700 | 570 | 8,000 | 18,000 | 267,420 |
LWG031 | 0 | 20.4 | 2,340 | 95,850 | 55,600 | 1,050 | 4,250 | 12,000 | 171,090 |
LWG032 | 0 | 19.9 | 3,780 | 153,750 | 87,700 | 611 | 7,250 | 17,000 | 270,091 |
LWG033 | 0 | 12.0 | 4,100 | 124,600 | 71,400 | 969 | 4,360 | 12,000 | 217,429 |
LWG034 | 0 | 6.0 | 3,590 | 153,900 | 86,600 | 544 | 8,600 | 18,000 | 271,234 |
LWG035 | 0 | 14.6 | 2,000 | 73,700 | 44,100 | 1,240 | 3,460 | 11,000 | 135,500 |
LWG050 | 0 | 21.0 | 4,420 | 152,300 | 93,800 | 497 | 7,300 | 21,000 | 279,317 |
LWG052 | 0 | 7.1 | 3,880 | 150,050 | 86,400 | 592 | 7,620 | 18,000 | 266,542 |
Average of 30 Samples | 3,915 | 141,298 | 84,345 | 615 | 6,606 | 18,700 | 255,479 |
APPENDIX 3 - Entrained Brine Samples Chemical Analysis Results
HOLE ID | From (m) | To (m) | K (mg/L) | Cl (mg/L) | Na (mg/L) | Ca (mg/L) | Mg (mg/L) | SO4 (mg/L) | TDS (mg/L) |
LWG001 | 7.1 | 7.2 | 3,952 | 145,712 | 95,330 | 494 | 9,138 | 29,233 | 283,859 |
LWG004 | 5.6 | 5.7 | 4,058 | 160,273 | 95,353 | 487 | 8,250 | 22,993 | 291,414 |
LWG007 | 1.3 | 1.4 | 3,899 | 148,511 | 87,193 | 525 | 7,869 | 21,975 | 269,972 |
LWG007 | 6.3 | 6.4 | 6,081 | 169,907 | 104,806 | 501 | 7,333 | 20,747 | 309,375 |
LWG008 | 10.1 | 10.2 | 4,279 | 149,756 | 94,774 | 556 | 7,809 | 20,966 | 278,140 |
LWG009 | 3.6 | 3.7 | 3,770 | 149,818 | 94,743 | 646 | 5,934 | 14,752 | 269,663 |
LWG010 | 1.3 | 1.4 | 3,746 | 145,699 | 87,114 | 597 | 6,751 | 19,165 | 263,072 |
LWG010 | 10.2 | 10.3 | 4,118 | 152,421 | 91,019 | 527 | 7,043 | 20,227 | 275,355 |
LWG010 | 19.2 | 19.3 | 4,645 | 166,030 | 96,349 | 470 | 6,653 | 19,442 | 293,589 |
LWG012 | 11.9 | 12.0 | 4,302 | 161,555 | 93,070 | 527 | 7,595 | 21,072 | 288,121 |
LWG012 | 20.0 | 20.1 | 4,498 | 157,418 | 97,361 | 529 | 7,672 | 21,959 | 289,437 |
LWG014 | 1.3 | 1.4 | 4,250 | 150,484 | 91,439 | 528 | 7,696 | 22,975 | 277,372 |
LWG014 | 11.1 | 11.1 | 4,749 | 156,322 | 96,959 | 594 | 7,519 | 22,162 | 288,305 |
LWG015 | 1.3 | 1.4 | 3,888 | 152,721 | 100,213 | 525 | 7,295 | 19,722 | 284,364 |
LWG015 | 9.5 | 9.6 | 3,949 | 154,474 | 101,483 | 465 | 7,599 | 20,697 | 288,667 |
LWG017 | 13.6 | 13.7 | 4,955 | 153,615 | 94,151 | 694 | 6,937 | 23,785 | 284,137 |
LWG018 | 1.6 | 1.6 | 4,483 | 151,462 | 90,122 | 486 | 6,983 | 22,648 | 276,184 |
LWG020 | 0.4 | 0.5 | 3,890 | 147,400 | 88,400 | 449 | 8,370 | 24,000 | 272,509 |
LWG020 | 3.9 | 4.0 | 3,920 | 145,150 | 90,800 | 480 | 7,600 | 23,000 | 270,950 |
LWG021 | 14.1 | 14.2 | 4,283 | 144,070 | 88,194 | 623 | 6,425 | 18,106 | 261,701 |
LWG022 | 4.2 | 4.3 | 3,553 | 143,656 | 88,047 | 602 | 8,032 | 20,390 | 264,280 |
LWG022 | 10.2 | 10.3 | 3,608 | 146,084 | 84,391 | 565 | 7,392 | 20,079 | 262,119 |
LWG023 | 14.1 | 14.2 | 4,013 | 143,025 | 95,635 | 623 | 6,148 | 17,164 | 266,608 |
LWG023 | 18.0 | 18.1 | 3,922 | 137,253 | 84,593 | 644 | 6,022 | 15,126 | 247,560 |
LWG024 | 0.6 | 0.7 | 4,690 | 150,533 | 88,504 | 518 | 5,976 | 20,424 | 270,645 |
LWG024 | 2.8 | 2.9 | 4,869 | 151,784 | 90,307 | 563 | 5,680 | 19,092 | 272,295 |
LWG024 | 6.4 | 6.5 | 4,826 | 150,214 | 91,434 | 588 | 5,769 | 19,230 | 272,061 |
LWG025 | 1.4 | 1.5 | 4,829 | 144,871 | 86,922 | 662 | 5,312 | 17,384 | 259,980 |
LWG025 | 11.7 | 11.8 | 3,961 | 141,606 | 88,132 | 634 | 6,635 | 17,824 | 258,792 |
LWG025 | 17.7 | 17.8 | 3,823 | 147,690 | 92,089 | 591 | 6,603 | 17,375 | 268,171 |
LWG026 | 1.3 | 1.4 | 3,901 | 124,010 | 73,768 | 797 | 4,587 | 15,368 | 222,431 |
LWG026 | 16.7 | 16.8 | 3,628 | 147,248 | 90,910 | 619 | 7,256 | 17,499 | 267,160 |
LWG027 | 0.5 | 0.6 | 3,751 | 152,951 | 84,846 | 533 | 9,166 | 19,283 | 270,530 |
LWG027 | 3.4 | 3.5 | 3,727 | 155,296 | 90,889 | 588 | 8,958 | 19,616 | 279,074 |
LWG027 | 5.8 | 5.9 | 4,045 | 157,114 | 95,513 | 653 | 8,711 | 19,289 | 285,325 |
LWG027 | 16.2 | 16.3 | 3,807 | 157,037 | 93,271 | 666 | 8,328 | 19,035 | 282,144 |
LWG028 | 1.2 | 1.3 | 3,393 | 148,975 | 88,297 | 579 | 7,220 | 17,833 | 266,297 |
LWG028 | 14.1 | 14.2 | 3,346 | 145,799 | 97,996 | 574 | 6,931 | 17,687 | 272,333 |
LWG029 | 1.4 | 1.5 | 3,836 | 118,216 | 71,096 | 846 | 4,420 | 14,178 | 212,592 |
LWG029 | 16.2 | 16.3 | 4,959 | 198,368 | 133,403 | 893 | 10,414 | 17,842 | 365,879 |
LWG030 | 0.6 | 0.7 | 3,113 | 151,924 | 83,025 | 565 | 9,081 | 17,873 | 265,581 |
LWG030 | 2.8 | 2.9 | 3,395 | 158,636 | 92,309 | 614 | 9,074 | 16,973 | 281,001 |
LWG030 | 18.2 | 18.3 | 3,631 | 158,217 | 94,152 | 519 | 8,948 | 16,340 | 281,807 |
LWG031 | 5.1 | 5.2 | 2,090 | 87,035 | 52,253 | 1,104 | 4,148 | 12,084 | 158,714 |
LWG032 | 1.3 | 1.4 | 3,198 | 148,170 | 82,222 | 611 | 7,052 | 17,130 | 258,383 |
LWG033 | 1.9 | 2.0 | 4,277 | 129,496 | 77,935 | 974 | 4,594 | 11,880 | 229,156 |
LWG033 | 11.6 | 11.7 | 3,971 | 134,141 | 79,884 | 854 | 5,218 | 13,391 | 237,459 |
LWG034 | 1.2 | 1.3 | 3,601 | 155,119 | 90,198 | 567 | 8,729 | 18,913 | 277,127 |
LWG035 | 1.8 | 1.9 | 1,690 | 65,138 | 38,691 | 1,217 | 3,257 | 10,285 | 120,278 |
LWG050 | 0.4 | 0.5 | 4,450 | 152,200 | 92,000 | 431 | 7,980 | 24,000 | 281,061 |
LWG050 | 3.4 | 3.5 | 4,250 | 148,650 | 90,300 | 514 | 7,100 | 21,000 | 271,814 |
LWG050 | 5.8 | 5.9 | 5,056 | 157,618 | 110,630 | 773 | 8,030 | 21,412 | 303,519 |
LWG050 | 18.5 | 18.6 | 4,726 | 159,200 | 100,987 | 696 | 7,611 | 19,900 | 293,120 |
LWG050 | 20.6 | 20.7 | 4,429 | 166,150 | 98,415 | 689 | 7,430 | 19,700 | 296,813 |
LWG050 | 1.3 | 1.4 | 4,480 | 149,200 | 91,300 | 492 | 7,480 | 22,000 | 274,952 |
LWG050 | 2.6 | 2.7 | 4,510 | 148,500 | 90,500 | 531 | 7,030 | 20,000 | 271,071 |
LWG050 | 4.3 | 4.4 | 4,530 | 147,600 | 95,700 | 551 | 7,720 | 21,000 | 277,101 |
Average of 57 samples | 4,063 | 148,097 | 90,341 | 617 | 7,167 | 19,214 | 269,499 |
APPENDIX 3 - Interim Sediment Porosity Determinations
HoleID | Sample ID | From | To | Brine Porosity (v/v) | HoleID | Sample ID | From | To | Brine Porosity (v/v) | |
LWG001 | P200042 | 0.5 | 0.6 | 50.5 | LWG017 | P200058 | 0.59 | 0.69 | 49.8 | |
LWG001 | P200043 | 3.25 | 3.35 | 46.6 | LWG017 | P200059 | 3.35 | 3.45 | 43.9 | |
LWG001 | P200044 | 6.98 | 7.08 | 38.2 | LWG017 | P200060 | 9.97 | 10.07 | 50.0 | |
LWG004 | P200045 | 0.58 | 0.68 | 42.8 | LWG017 | P200061 | 12.985 | 13.09 | 45.6 | |
LWG004 | P200046 | 2.985 | 3.085 | 36.1 | LWG017 | P200069 | 19.08 | 19.18 | 36.4 | |
LWG004 | P200047 | 6.915 | 7.015 | 41.3 | LWG018 | P200014 | 0.33 | 0.43 | 43.5 | |
LWG007 | P200039 | 0.58 | 0.68 | 55.0 | LWG018 | P200015 | 3.35 | 3.45 | 46.7 | |
LWG007 | P200040 | 3.59 | 3.69 | 36.4 | LWG018 | P200016 | 5.06 | 5.16 | 42.6 | |
LWG007 | P200041 | 6.1 | 6.2 | 38.7 | LWG018 | P200017 | 9.37 | 9.47 | 50.9 | |
LWG008 | P200048 | 0.465 | 0.565 | 43.1 | LWG018 | P200018 | 12.41 | 12.51 | 41.0 | |
LWG008 | P200049 | 2.632 | 2.732 | 42.5 | LWG018 | P200019 | 18.4 | 18.5 | 34.9 | |
LWG008 | P200050 | 6.57 | 6.67 | 37.5 | LWG020 | P200008 | 0.422 | 0.522 | 52.4 | |
LWG008 | P200051 | 9.05 | 9.15 | 31.8 | LWG020 | P200009 | 3.788 | 3.88 | 47.5 | |
LWG008 | P200052 | 11.92 | 12.02 | 40.1 | LWG020 | P200010 | 6.35 | 6.45 | 48.9 | |
LWG009 | P200033 | 0.58 | 0.68 | 46.3 | LWG020 | P200011 | 9.25 | 9.35 | 46.0 | |
LWG009 | P200034 | 3.59 | 3.69 | 48.3 | LWG020 | P200012 | 12.3 | 12.4 | 46.3 | |
LWG009 | P200035 | 5.84 | 5.94 | 48.6 | LWG020 | P200013 | 18.46 | 18.56 | 43.0 | |
LWG009 | P200036 | 9.6 | 9.7 | 43.2 | LWG021 | P200076 | 0.59 | 0.69 | 32.5 | |
LWG009 | P200037 | 12.1 | 12.2 | 41.3 | LWG021 | P200077 | 2.84 | 2.94 | 57.6 | |
LWG009 | P200038 | 16.59 | 16.69 | 36.4 | LWG021 | P200078 | 5.6 | 5.7 | 49.3 | |
LWG010 | P200062 | 0.6 | 0.7 | 44.1 | LWG021 | P200079 | 9.5 | 9.6 | 43.7 | |
LWG010 | P200063 | 3.25 | 3.35 | 50.4 | LWG021 | P200080 | 12.1 | 12.2 | 38.7 | |
LWG010 | P200065 | 10.35 | 10.45 | 58.5 | LWG022 | P200070 | 3.2 | 3.3 | 47.9 | |
LWG010 | P200066 | 12.6 | 12.7 | 48.0 | LWG022 | P200071 | 0.5 | 0.6 | 47.1 | |
LWG010 | P200067 | 19.35 | 19.45 | 41.1 | LWG022 | P200072 | 7.535 | 7.635 | 43.1 | |
LWG012 | P200053 | 0.55 | 0.65 | 47.7 | LWG022 | P200073 | 10.33 | 10.43 | 32.0 | |
LWG012 | P200054 | 3.315 | 3.415 | 31.2 | LWG022 | P200074 | 12.6 | 12.7 | 41.8 | |
LWG012 | P200055 | 9.344 | 9.444 | 43.0 | LWG022 | P200075 | 7.535 | 7.635 | 53.3 | |
LWG012 | P200056 | 19.07 | 19.17 | 52.0 | LWG023 | P200081 | 0.59 | 0.69 | 45.2 | |
LWG012 | P200057 | 22.1 | 22.2 | 42.1 | LWG023 | P200082 | 3.37 | 3.47 | 39.0 | |
LWG014 | P200020 | 0.35 | 0.45 | 42.2 | LWG023 | P200083 | 6.13 | 6.23 | 42.4 | |
LWG014 | P200021 | 3.35 | 3.45 | 44.8 | LWG023 | P200084 | 9.5 | 9.6 | 45.1 | |
LWG014 | P200022 | 6.4 | 6.5 | 57.3 | LWG023 | P200085 | 12.56 | 12.66 | 41.1 | |
LWG014 | P200023 | 9.75 | 9.85 | 37.0 | LWG023 | P200086 | 18.38 | 18.48 | 37.6 | |
LWG014 | P200024 | 12.706 | 12.806 | 63.7 | LWG024 | P200087 | 0.65 | 0.75 | 56.6 | |
LWG014 | P200025 | 17.75 | 17.85 | 37.8 | LWG024 | P200088 | 2.6 | 3 | 43.9 | |
LWG015 | P200026 | 0.28 | 0.38 | 45.5 | LWG024 | P200089 | 6.5 | 6.6 | 39.9 | |
LWG015 | P200027 | 3.44 | 3.54 | 46.4 | LWG025 | P200115 | 3.48 | 3.58 | 38.8 | |
LWG015 | P200028 | 6.41 | 6.51 | 50.8 | LWG025 | P200116 | 6.57 | 6.67 | 49.8 | |
LWG015 | P200029 | 9.44 | 9.54 | 50.8 | LWG025 | P200117 | 10.07 | 10.17 | 39.6 | |
LWG015 | P200030 | 12.4 | 12.5 | 44.7 | LWG025 | P200118 | 12.56 | 12.66 | 50.4 | |
LWG015 | P200031 | 17.74 | 17.84 | 54.3 | LWG025 | P200119 | 18.62 | 18.72 | 56.5 | |
LWG026 | P200108 | 0.58 | 0.68 | 53.8 | LWG034 | P200147 | 0.6 | 0.7 | 57.0 | |
LWG026 | P200109 | 3.45 | 3.55 | 57.4 | LWG034 | P200148 | 3.41 | 3.51 | 54.1 | |
LWG026 | P200110 | 6.52 | 6.62 | 46.0 | LWG034 | P200149 | 6.44 | 6.54 | 50.2 | |
LWG026 | P200111 | 9.47 | 9.57 | 56.1 | LWG035 | P200142 | 1.3 | 1.4 | 44.7 | |
LWG026 | P200112 | 12.97 | 13.07 | 60.6 | LWG035 | P200143 | 3.41 | 3.51 | 35.9 | |
LWG027 | P200090 | 0.65 | 0.75 | 47.0 | LWG035 | P200144 | 6.43 | 6.53 | 56.7 | |
LWG027 | P200091 | 2.9 | 3 | 31.9 | LWG035 | P200145 | 9.59 | 9.69 | 46.6 | |
LWG027 | P200092 | 5.9 | 6 | 42.6 | LWG035 | P200146 | 12.32 | 12.42 | 55.6 | |
LWG027 | P200093 | 8.9 | 9 | 45.9 | LWG050 | P200001 | 0.43 | 0.53 | 42.5 | |
LWG027 | P200094 | 11.9 | 12 | 46.5 | LWG050 | P200002 | 3.42 | 3.52 | 40.0 | |
LWG027 | P200095 | 16.69 | 16.79 | 53.5 | LWG050 | P200003 | 5.785 | 5.885 | 56.7 | |
LWG028 | P200120 | 0.57 | 0.67 | 43.2 | LWG050 | P200004 | 9.495 | 9.595 | 48.0 | |
LWG028 | P200121 | 3.57 | 3.67 | 54.2 | LWG050 | P200005 | 12.49 | 12.59 | 49.4 | |
LWG028 | P200122 | 6.58 | 6.68 | 40.8 | LWG050 | P200006 | 18.47 | 18.57 | 51.5 | |
LWG028 | P200123 | 9.59 | 9.69 | 37.0 | LWG050 | P200007 | 20.61 | 20.71 | 39.2 | |
LWG028 | P200124 | 12.56 | 12.66 | 55.5 | ||||||
LWG028 | P200125 | 17.64 | 17.74 | 52.3 | ||||||
LWG029 | P200102 | 0.51 | 0.61 | 44.2 | ||||||
LWG029 | P200103 | 3.54 | 3.67 | 55.8 | ||||||
LWG029 | P200104 | 6.59 | 6.69 | 49.8 | ||||||
LWG029 | P200105 | 9.59 | 9.69 | 57.8 | ||||||
LWG029 | P200106 | 12.55 | 12.65 | 44.1 | ||||||
LWG029 | P200107 | 17.91 | 18.01 | 43.1 | ||||||
LWG030 | P200096 | 0.65 | 0.75 | 50.2 | ||||||
LWG030 | P200097 | 2.9 | 3 | 48.7 | ||||||
LWG030 | P200098 | 6.06 | 6.16 | 46.9 | ||||||
LWG030 | P200099 | 9.39 | 9.49 | 54.2 | ||||||
LWG030 | P200100 | 11.9 | 12 | 57.1 | ||||||
LWG030 | P200101 | 18.6 | 18.7 | 49.9 | ||||||
LWG031 | P200126 | 1.34 | 1.44 | 34.8 | ||||||
LWG031 | P200127 | 3.59 | 3.69 | 47.3 | ||||||
LWG031 | P200128 | 6.38 | 6.48 | 35.3 | ||||||
LWG031 | P200129 | 9.59 | 9.69 | 50.5 | ||||||
LWG031 | P200130 | 12.47 | 12.57 | 54.7 | ||||||
LWG031 | P200131 | 18.3 | 18.4 | 61.3 | ||||||
LWG032 | P200132 | 0.44 | 0.54 | 52.5 | ||||||
LWG032 | P200133 | 3.58 | 3.68 | 46.9 | ||||||
LWG032 | P200134 | 6.18 | 6.28 | 48.7 | ||||||
LWG032 | P200135 | 9.28 | 9.38 | 51.6 | ||||||
LWG032 | P200136 | 12.22 | 12.32 | 52.8 | ||||||
LWG033 | P200137 | 1.06 | 1.16 | 43.4 | ||||||
LWG033 | P200138 | 3.33 | 3.43 | 46.8 | ||||||
LWG033 | P200139 | 6.53 | 6.63 | 40.6 | ||||||
LWG033 | P200140 | 8.83 | 8.93 | 39.5 | ||||||
LWG033 | P200141 | 11.74 | 11.84 | 43.9 |
APPENDIX 4 - JORC TABLE 1
SECTION 1 SAMPLING TECHNIQUES AND DATA
Criteria | JORC Code explanation | Commentary |
Sampling techniques | Nature and quality of sampling (eg 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. | All drilling and sampling is completed using hollow-core auger. Split tube drill core was taken for two auger holes twinned within 5 metres of an existing intact tube auger hole. Intact core is taken for all other intervals of all other holes. The intact core is completed using clear Lexan tubes which are sealed shortly after drilling. Bulk water (brine) samples from auger drilling were taken at the end of drilling each hole by purging the hole with a submersible pump, then taking the sample after purging. These brine samples are composite samples from the water table intersection to the end of hole. Split tube drill core was taken for two auger holes twinned within 5 metres of an existing intact tube auger hole. Entrained brine samples were recovered by centrifuging selected intervals of intact drill core. Entrained brine samples are marked up in 0.1m intervals in the field within pre-determined geological horizons. Porosity samples are marked up at 0.1m intervals in the field at pre-determined depths (approximately 3m down each hole). |
Drilling techniques | Drill type (eg core, reverse circulation, open-hole hammer, rotary air blast, auger, Bangka, sonic, etc) and details (eg core diametre, 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). | Auger drilling was undertaken with an auger rig. Auger bit size was 178 mm, using 50 mm hollow core auger and 1.5 metre long rods. Core and/or chips were not oriented. Core diameter was 50 mm |
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. | Sediment samples were collected by hand from the collar of the hole as produced by the auger flights from the outside return. Brine was sampled from the auger holes at the completion of drilling once the hole had refilled with brine. Porosity and Entrained brine samples, 0.1 metres in length, were taken at intervals within the intact drill core where best representation of lithology was present and minimally affected by auger drilling processes. Core loss is directly measured by taking the difference between the interval drilled and the core recovered and adjusting for compaction. |
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. | All auger drill holes were geologically logged by a qualified geologist, noting in particular moisture content of sediments, lithology, colour, induration, grainsize, matrix and structural observations. A digital drill log was developed specifically for this project. |
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 for instance results for field duplicate/second-half sampling. Whether sample sizes are appropriate to the grain size of the material being sampled. | Brine was sampled directly from the auger hole with duplicates taken periodically. Sample bottles are rinsed with brine which is discarded prior to sampling. Occasional auger holes were drilled within 3m of the intact core holes and used to provide lubrication brine to advance drilling. The holes named auxiliary auger holes were drilled to the top of the upper clay and brine sampling was undertaken. Where water was injected into auger holes during drilling the holes were flushed completely three times before brine samples were taken. Where this couldn't be achieved immediately after drilling the holes were re-sampled at a later date, using the same technique. Geological logs are recorded in the field based on inspection of cuttings, and a small amount of visible intact core tube material. Geological samples are retained for each hole in archive. All brine samples taken in the field are split into three sub-samples: primary, potential duplicate, and archive. |
Quality of assay data and laboratory tests | The nature, quality and appropriateness of the assaying 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, reading times, calibrations factors applied and their derivation, etc. Nature of quality control procedures adopted (eg standards, blanks, duplicates, external laboratory checks) and whether acceptable levels of accuracy (ie lack of bias) and precision have been established.
| · Porosity was determined gravimetrically by weighing the wet sample, drying at 80 degrees and weighing the dry sample. · Brine samples were analysed · using ICP-AES for K, Na, Mg, Ca, with chloride determined by Mohr titration and alkalinity determined volumetrically. Sulphate was calculated from the ICP-AES sulphur analysis Primary samples were sent to Bureau Veritas Minerals Laboratory, Perth. Secondary samples were send to ALS Ammtec Laboratory in Perth, and Intertek Genalysis Laboratory in Perth. · Reference standard solutions were sent to Bureau Veritas Minerals Laboratory, and Intertek Genalysis Laboratory to check accuracy. · |
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. | Data entry is done in the field to minimise transposition errors. Brine assay results are received from the laboratory in digital format to prevent transposition errors and these data sets are subject to the quality control described above. Two holes were twinned for comparison of logging between split core and intact core. Independent verification of significant intercepts was not considered warranted given the relatively consistent nature of the brine resource. |
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. | Hole co-ordinates were captured using hand held GPS. Coordinates were provided in GDA 94_MGA Zone 51. Topographic control is obtained using Geoscience Australia's 3-second digital elevation product. Topographic control is not considered critical as the salt lakes are generally flat lying and the water table is taken to be the top surface of the brine resource. |
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. | Drill hole spacing is approximately 5km x 5km or better across the lake. The drilling is not on an exact grid due to the irregular nature of the salt lake shape and difficulty obtaining access to some part of the salt lake. Data points are presented in Appendix 1. A total of 2 twinned split core, 23 auxiliary shallow holes and 28 intact core auger holes were drilled. |
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. | All drill holes were vertical as geological structure is flat lying. Structures may be present in the underlying clay and may control brine flow in the sub-surface, but their orientations are unknown. |
Sample security | The measures taken to ensure sample security. | All entrained brine and porosity samples were marked and kept onsite before transport to the laboratory. The entire core was sent to the laboratory where the marked intervals are cut and analysed. Bulk water (brine) samples were held on site before transport to the laboratory. Some samples were sent via the main office in Perth for sorting, before being sent on to respective laboratories. All remaining sample and duplicates are stored in the Perth office in climate-controlled conditions. Chain of Custody system is maintained. |
Audits or reviews | The results of any audits or reviews of sampling techniques and data. | Data review is summarised in Quality of assay data and laboratory tests and Verification of sampling and assaying. No audits were undertaken. |
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. | Tenements drilled were granted exploration licences 38/2710, 38/2821 and 38/2824 in Western Australia. Exploration Licenses are held by Piper Preston Pty Ltd (fully owned subsidiary of ASLP).
|
Exploration done by other parties | Acknowledgment and appraisal of exploration by other parties. | No other known exploration has occurred on the Exploration Licences. |
Geology | Deposit type, geological setting and style of mineralisation. | Salt Lake Brine Deposit |
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 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. | Exploration and resource definition drilling comprised of 32 hollow tube auger drillholes drilled to a depth of between 1.5 and 22.95 metres. Drillhole details and locations of all data points are presented in Appendix 1. Drilling, sampling and logging techniques are summarised in Section 1.
|
Data aggregation methods | In reporting Exploration Results, weighting averaging techniques, maximum and/or minimum grade truncations (eg 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. | No data aggregation has been undertaken. The complete data set is used for analysis. Within the salt lake extent no low grade cut-off or high grade capping has been implemented due to the consistent nature of the brine assay data. |
Relationship between mineralisation widths and intercept lengths | These relationships are particularly important in the 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'). | The brine resource is inferred to be consistent and continuous through the full thickness of the Lake Playa sediments unit. The unit is flat lying and drillholes are vertical hence the intersected downhole depth is equivalent to the inferred thickness of mineralisation. |
Diagrams | Appropriate maps and sections (with 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. | Addressed in the announcement. |
Balanced reporting | Where comprehensive reporting of 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. | All results have been included. |
Other substantive exploration data | Other exploration data, if meaningful and material, should be reported 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. | All material exploration data reported. |
Further work | The nature and scale of planned further work (eg tests for lateral 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. | Air Core drilling to be undertaken to further assess the occurrence of brine at depth and the nature of the basement. Hydraulic testing be undertaken, for instance pumping tests from bores and/or trenches to determine, aquifer properties, expected production rates and infrastructure design (trench and bore size and spacing). Lake recharge dynamics be studied to determine the lake water balance and subsequent production water balance. For instance simultaneous data recording of rainfall and subsurface brine level fluctuations to understand the relationship between rainfall and lake recharge, and hence the brine recharge dynamics of the Lake. Study of the potential solid phase soluble or exchangeable potassium resource.
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For further information please visit www.wildhorse.com.au or contact:
Sam Cordin | Wildhorse Energy Limited | Tel: +61 8 9322 6322 |
Colin Aaronson/ Richard Tonthat/ Daniel Bush | Grant Thornton UK LLP | Tel: +44 (0)207 383 5100 |
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