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30.01.2015
Great Panther Updates Mineral Resource Estimates at the Guanajuato Mine Complex

Great Panther Updates Mineral Resource Estimates at the Guanajuato Mine Complex

 

VANCOUVER, BRITISH COLUMBIA--(Marketwired - Jan. 29, 2015) - GREAT PANTHER SILVER LIMITED (TSX: GPR)(NYSE MKT:GPL) ("Great Panther", the "Company") announces an updated Mineral Resource Estimate at the Company's wholly-owned Guanajuato Mine Complex ("GMC") in Guanajuato, Mexico, including updates on the Guanajuato ("GTO") and San Ignacio ("SI") Mines and the El Horcon Project. The updated Mineral Resource Estimate does not include the most recent drill results at San Ignacio and the discovery of high grade silver-gold mineralization to the south of the existing resource block (see news releases Oct. 30, 2014 and Jan. 27, 2015). This new data will be the subject of a further resource update later this quarter.

 

Highlights of the updated Mineral Resource Estimate are as follows:

 

ï‚·                      Updated Measured and Indicated ("M&I") mineral resources at the producing operations of the GMC (Guanajuatoand San Ignacio Mines) comprise 349,700 tonnes at a grade of 260g/t silver ("Ag") and 3.32g/t gold ("Au"), containing 5,558,000 silver equivalent ounces ("Ag eq oz"), using various silver equivalent ("Ag eq") cut-offs in the different mineralized zones.

 

ï‚·                      Inferred mineral resources at the producing operations of the GMC are estimated to comprise 451,900 tonnes at a grade of 147g/t Ag and 3.34g/t Au, containing 5,556,500 Ag eq oz. Different cut-off grades were used for the mineralized zones as indicated in the tables below. Including the non-producing El Horcon Project, Inferred resources comprise 601,100 tonnes at 130g/t Ag and 3.38g/t Au, containing 7,637,700 Ag eq oz.

 

"This latest Mineral Resource Estimate for the GMC represents a 37% increase in Measured and Indicated Resources despite the impact of much higher cut-off values due to the decline in metal prices in 2014. In addition, we expect a resource update before the end of the quarter from the recent drilling completed at San Ignacio," stated Robert Archer , President & CEO. "We have also increased our 2015 drilling budgets for both San Ignacio and Guanajuato. This will allow us to further delineate the recently discovered high grade mineralization at San Ignacio and increase our confidence in the deep resources at theGuanajuato Mine."

 

The 2014 Guanajuato Mine Mineral Resource Estimate contains Measured and Indicated mineral resources of 3,757,800 Ag eq oz including 3,190,300 Ag eq oz in the Measured category and 567,500 Ag eq oz in the Indicated category. Inferred mineral resources are estimated at 1,782,200 Ag eq oz. These are all contained within the Cata Clavo (seven zones), Los Pozos (two zones), Santa Margarita, San Cayetano, Promontorio, Valenciana (five zones) and Guanajuatito (five zones) areas. The Guanajuatito ("GTTO") area has been expanded with the addition of the Intermediate zone located in the foot wall to the GTTO hanging wall zone. Resources in the Santa Margarita and Cata areas have also been increased.

 

Mining of the Cata, Los Pozos, Santa Margarita and Guanajuatito areas currently accounts for most of the Guanajuato metal production. This updated mineral resource will help in guiding development and improving grades at the mines. Underground drilling has resumed in 2015 with three drill rigs to delineate new resources on the upper extensions of Los Pozos SE and Santa Margarita, and the up-dip and northwest extensions of the Cata Clavo zones.

 

Summary Table of 2014 Mineral Resource Estimate for the Guanajuato Mine Complex1

 

MEASURED & INDICATED

Mine

 

Tonnes

 

Ag (g/t)

 

Ag (oz)

 

Au (g/t)

 

Au (oz)

 

Ag eq (g/t)

 

Ag eq (oz)

SI (Indicated only)

 

129,200

 

169

 

700,200

 

3.75

 

15,580

 

433

 

1,800,200

GTO (Measured)

 

184,500

 

309

 

1,832,500

 

3.24

 

19,780

 

538

 

3,190,300

GTO (Indicated)

 

36,000

 

335

 

387,900

 

2.20

 

2,540

 

490

 

567,500

Total M & I

 

349,700

 

260

 

2,920,600

 

3.32

 

37,900

 

494

 

5,558,000

INFERRED

Mine

 

Tonnes

 

Ag (g/t)

 

Ag (oz)

 

Au (g/t)

 

Au (oz)

 

Ag eq (g/t)

 

Ag eq (oz)

SI

 

288,300

 

173

 

1,600,200

 

3.32

 

30,790

 

407

 

3,774,300

GTO

 

163,600

 

101

 

532,600

 

3.37

 

17,710

 

339

 

1,782,200

SI & GTO Inferred

 

451,900

 

147

 

2,132,800

 

3.34

 

48,532

 

382

 

5,556,500

El Horcon²

 

149,200

 

78

 

375,300

 

3.51

 

16,830

 

434

 

2,081,200

Total Inferred

 

601,100

 

130

 

2,508,100

 

3.38

 

65,330

 

395

 

7,637,700

1 All Mineral Resource Estimates used an effective date of July 31, 2014 and all used a metal price outlook of $17.00/oz silver and $1,200/oz gold.

2 Silver equivalent calculations for El Horcon include lead content but not zinc as the zinc would not be recovered in the Guanajuato plant (see table below for lead content). Recoveries and smelter terms are also factored into the calculation.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The 2014 San Ignacio Mine Mineral Resource Estimate contains 1,800,200 Ag eq oz in the Indicated category, in the Intermediate and Melladito veins. Inferred mineral resources are estimated at 3,774,300 Ag eq oz and are contained in the Intermediate, Melladito, Nombre de Dios and Nombre de Dios II veins. Recent surface drilling at San Ignacio has discovered that the Intermediate and Melladito veins merge, just south of the aforementioned resource block, into a thicker, higher grade lens of silver-gold mineralization. The data from this program are presently being compiled, interpreted and modelled, and a new San Ignacio Mineral Resource Estimate will be announced in the first quarter 2015.

 

Mining at San Ignacio in 2014 was focused on the Intermediate vein and, to a lesser degree, the Melladito vein. As the two merge to the south, the single vein will retain the Melladito name. Underground drilling in 2015 will be focused on improving the classification of the resource on this new zone, while surface drilling will test the depth and strike continuity of all veins.

 

The 2014 Mineral Resource Estimate for the El Horcon Project (see table below) includes only the Inferred classification of 149,200 tonnes containing 374,200 oz silver, 16,840 oz gold, 9,275,000 lbs lead, and 13,024,500 lbs zinc. There has been no additional drilling since 2013 and the resource update reflects only updated metal pricing, which resulted in a 7% decrease compared to the previously reported mineral resource. The El Horcon Project is not in production and the Company has no specific plans to advance the project in 2015 except by completing various environmental permitting that is already underway.

 

Overall, from the last Mineral Resource Estimate (effective date July 31, 2013), the Measured and Indicated classification increased by 37% (+1,487,900 Ag eq oz), while the Inferred mineral resource decreased by 22% (-2,206,250 Ag eq oz). Part of the difference is due to the conversion of Inferred Resources to M&I at GTO and SI. Management is committed to maintaining or increasing mineral resources at the Guanajuato Mine Complex, and has increased the drilling budget for 2015.

 

The estimates were classified according to the CIM Definition Standards on Mineral Resources and Mineral Reserves and, as such, are consistent with the requirements of NI 43-101. The mineral resource estimate was completed by Robert Brown , P. Eng. and Company, Q.P.

 

San Ignacio Mine: Mineral Resource Estimations and Contained Silver, Gold and Silver Equivalent

 

INDICATED

Vein

 

Tonnes

 

Ag (g/t)

 

Ag (oz)

 

Au (g/t)

 

Au (oz)

 

Ag eq (g/t)

 

Ag eq (oz)

Intermediate

 

107,883

 

184

 

638,033

 

3.95

 

13,713

 

463

 

1,606,183

Melladito

 

21,310

 

91

 

62,196

 

2.73

 

1,867

 

283

 

194,026

Total Indicated

 

129,200

 

169

 

700,200

 

3.75

 

15,580

 

433

 

1,800,200

INFERRED

Vein

 

Tonnes

 

Ag (g/t)

 

Ag(oz)

 

Au (g/t)

 

Au (oz)

 

Ag eq (g/t)

 

Ag eq (oz)

Intermediate

 

118,298

 

212

 

804,685

 

3.14

 

11,943

 

433

 

1,647,869

Melladito

 

15,498

 

85

 

42,322

 

2.67

 

1,330

 

273

 

136,215

Nombre de Dios

 

68,060

 

108

 

235,833

 

3.01

 

6,596

 

321

 

701,489

Nombre de Dios II

 

86,441

 

186

 

517,391

 

3.93

 

10,925

 

464

 

1,288,694

Total Inferred

 

288,300

 

173

 

1,600,200

 

3.32

 

30,790

 

407

 

3,774,300

 

Notes:

 

1.

All Mineral Resource Estimates used an effective date of July 31, 2014 and all used a metal price outlook of $17.00/oz silver and $1,200/oz gold.

 

2.

246g/t Ag Eq Cut-off.

 

3.

Mill recoveries 83% silver and 85% gold.

 

4.

Silver equivalent was calculated using a 70.6 to 1 ratio of gold to silver value.

 

5.

Rock Density for Intermediate and Melladito is 2.63t/m3, Nombre de Dios is 2.61t/m3, and Nombre de Dios II is 2.62t/m3.

 

6.

Totals may not agree due to rounding.

 

7.

Grades in metric units.

 

8.

Contained silver and gold in troy ounces.

 

9.

Minimum true width 1.5m.

 

Guanajuato Mine: Mineral Resource Estimations and Contained Silver, Gold, and Silver Equivalent

 

MEASURED

Area

 

Tonnes

 

Ag (g/t)

 

Ag (oz)

 

Au (g/t)

 

Au (oz)

 

Ag Eq (g/t)

 

Ag Eq (oz)

Cata

 

55,932

 

444

 

798,886

 

1.88

 

3,919

 

577

 

1,036,929

Pozos

 

57,280

 

374

 

688,769

 

1.64

 

3,012

 

490

 

901,465

Guanajuatito

 

15,342

 

387

 

190,758

 

1.83

 

903

 

516

 

254,514

Santa Margarita

 

55,600

 

86

 

152,956

 

6.65

 

11,894

 

555

 

992,822

San Cayetano

 

376

 

91

 

1,104

 

4.01

 

48

 

375

 

4,528

Total Measured

 

184,500

 

309

 

1,832,500

 

3.24

 

19,780

 

538

 

3,190,300

 

INDICATED

Area

 

Tonnes

 

Ag (g/t)

 

Ag (oz)

 

Au (g/t)

 

Au (oz)

 

Ag Eq (g/t)

 

Ag Eq (oz)

Cata

 

12,832

 

429

 

176,862

 

1.77

 

728

 

553

 

228,315

Pozos

 

5,849

 

246

 

46,301

 

1.26

 

237

 

335

 

63,060

Guanajuatito

 

8,321

 

443

 

118,387

 

1.82

 

487

 

571

 

152,745

Santa Margarita

 

8,898

 

161

 

45,991

 

3.76

 

1,076

 

426

 

121,931

San Cayetano

 

117

 

87

 

326

 

4.04

 

15

 

372

 

1,399

Total Indicated

 

36,000

 

335

 

387,900

 

2.20

 

2,540

 

490

 

567,500

MEASURED & INDICATED

Area

 

Tonnes

 

Ag (g/t)

 

Ag (oz)

 

Au (g/t)

 

Au (oz)

 

Ag Eq (g/t)

 

Ag Eq (oz)

Cata

 

68,764

 

441

 

975,749

 

1.85

 

4,648

 

572

 

1,265,244

Pozos

 

63,129

 

362

 

735,070

 

1.60

 

3,250

 

475

 

964,525

Guanajuatito

 

23,663

 

406

 

309,145

 

1.83

 

1,390

 

535

 

407,259

Santa Margarita

 

64,498

 

96

 

198,947

 

6.26

 

12,970

 

538

 

1,114,753

San Cayetano

 

493

 

90

 

1,431

 

4.02

 

64

 

374

 

5,927

Total M & I

 

220,500

 

313

 

2,220,300

 

3.07

 

22,300

 

530

 

3,757,700

INFERRED

Vein

 

Tonnes

 

Ag (g/t)

 

Ag (oz)

 

Au (g/t)

 

Au (oz)

 

Ag Eq (g/t)

 

Ag Eq (oz)

Cata

 

4,778

 

445

 

68,318

 

2.37

 

364

 

612

 

93,987

Pozos

 

2,534

 

300

 

24,435

 

0.76

 

62

 

353

 

28,765

Guanajuatito

 

355

 

319

 

3,649

 

2.07

 

23

 

465

 

5,308

Santa Margarita

 

7,515

 

15

 

3,715

 

6.57

 

1,587

 

479

 

115,711

Valenciana

 

22,676

 

176

 

128,205

 

3.84

 

2,799

 

447

 

325,823

Promontorio

 

100,553

 

70

 

225,692

 

3.07

 

9,939

 

287

 

927,266

San Cayetano

 

25,172

 

97

 

78,578

 

3.62

 

2,934

 

353

 

285,336

Total Inferred

 

163,600

 

101

 

532,600

 

3.37

 

17,700

 

339

 

1,782,200

 

Notes:

 

1.

All Mineral Resource Estimates used an effective date of July 31, 2014 and all used a metal price outlook of $17.00/oz silver and $1,200/oz gold.

 

2.

Ag eq cut-off for Cata is 248g/t, Pozos 260g/t, Guanajuatito 352g/t, Santa Margarita 274g/t, Valenciana 360g/t, Promontorio 260g/t, San Cayetano 274g/t.

 

3.

Silver equivalent was calculated using a 70.6 to 1 ratio of gold to silver value.

 

4.

Rock Density for all veins is 2.68t/m3.

 

5.

Totals may not agree due to rounding.

 

6.

Grades in metric units.

 

7.

Contained silver and gold in troy ounces.

 

8.

Minimum true width 1.5m.

 

El Horcon Project: Mineral Resource Estimations and Contained Silver, Gold, Lead, and Zinc

 

INFERRED

Vein

Tonnes

Ag

(g/t)

Ag 

(oz)

Au (g/t)

Au 

(oz)

Pb (%)

Pb 

(lb)

Zn (%)

Zn (lb)

Diamantillo

102,413

91

299,415

3.07

10,109

3.23

7,299,035

4.78

10,803,180

Diamantillo HW

4,580

55

8,048

4.68

689

2.69

271,419

0.48

48,045

Natividad

5,069

149

24,237

3.11

507

1.88

209,791

0.12

13,603

San Guillermo

37,167

37

43,631

4.63

5,528

1.82

1,489,581

2.64

2,166,572

Total Inferred

149,200

78

374,200

3.51

16,840

2.82

9,275,000

3.96

13,024,500

 

Notes:

 

1.

All Mineral Resource Estimates used an effective date of July 31, 2014 and all used a metal price outlook of $17.00/oz silver and $1,200/oz gold, and $0.95/lb lead.

 

2.

US$110 NSR Cut-off (includes only Au, Ag, and Pb values).

 

3.

Rock Density for Diamantillo is 2.77t/m3, San Guillermo 2.78t/m3, Diamantillo HW is 2.62t/m3, Natividad 2.57t/m3.

 

4.

Estimated mill recoveries 85% silver, 88% gold, and 60% lead.

 

5.

Totals may not agree due to rounding.

 

6.

Grades in metric units.

 

7.

Contained silver and gold in troy ounces.

 

8.

Minimum true width 1.5m.

 

9.

Silver Equivalent was calculated using an in-house calculator considering estimated recoveries, metal prices, and smelter terms.

 

The Company's QA/QC program includes the regular insertion of blanks, duplicates, and standards into the sample shipments; diligent monitoring of assay results; and necessary remedial actions. Sample assaying was completed at the independent SGS-GTO lab in Guanajuato, GTO, Mexico. Silver assaying was completed with AAS12B technique, with over-limits (300g/t) completed by FAG323. Gold assaying was completed with FAA313 technique, with over-limits (10g/t) completed by FAG323. Where necessary lead, zinc, copper, arsenic and antimony assays were completed using atomic absorption spectroscopy.

 

The technical information contained in this news release has been reviewed and approved by Robert F. Brown , P. Eng. and Vice President of Exploration for the Company, who is the Qualified Person (QP) for the Guanajuato Mine Complex and the Mineral Resource Estimates under the meaning of NI 43-101. Aspects relating to mining and metallurgy are overseen by Ali Soltani , Chief Operating Officer for Great Panther and its Mexican subsidiary, Minera Mexicana El Rosario, S.A. de C.V.

 

ABOUT GREAT PANTHER

Great Panther Silver Limited is a primary silver mining and exploration company listed on the Toronto Stock Exchange trading under the symbol GPR, and on the NYSE MKT trading under the symbol GPL. The Company's current activities are focused on the mining of precious metals from its two wholly-owned operating mines in Mexico: the Guanajuato Mine Complex, which includes the San Ignacio satellite mine, and the Topia Mine in Durango. The Company also has two exploration projects inMexico, El Horcon and Santa Rosa, and is pursuing additional mining opportunities in the Americas.

 

Robert Archer

President & CEO

 

This news release contains forward-looking statements within the meaning of the United States Private Securities Litigation Reform Act of 1995 and forward-looking information within the meaning of Canadian securities laws (together, "forward-looking statements"). Such forward-looking statements may include but are not limited to the Company's plans for production at its Guanajuato and Topia Mines in Mexico, exploring its other properties in Mexico, the overall economic potential of its properties, the availability of adequate financing and involve known and unknown risks, uncertainties and other factors which may cause the actual results, performance or achievements expressed or implied by such forward-looking statements to be materially different. Such factors include, among others, risks and uncertainties relating to potential political risks involving the Company's operations in a foreign jurisdiction, uncertainty of production and cost estimates and the potential for unexpected costs and expenses, physical risks inherent in mining operations, currency fluctuations, fluctuations in the price of silver, gold and base metals, completion of economic evaluations, changes in project parameters as plans continue to be refined, the inability or failure to obtain adequate financing on a timely basis, and other risks and uncertainties, including those described in the Company's Annual Information Form for the year ended December 31, 2013 and Material Change Reports filed with the Canadian Securities Administrators available at www.sedar.com and reports on Form 40-F and Form 6-K filed with theSecurities and Exchange Commission and available at www.sec.gov.

 

Contact Information: 

Great Panther Silver Limited

Spiros Cacos 

Director Investor Relations

Toll free: 1 888 355 1766 or +1 604 638 8955

scacos@greatpanther.com

www.greatpanther.com

 



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