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September 2015 Quarterly Report

26th Oct 2015 09:48

RNS Number : 4116D
Wildhorse Energy Limited
26 October 2015
 



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.

 

 

 

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

 

This information is provided by RNS
The company news service from the London Stock Exchange
 
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