Resource Estimates

  • Photo Core 2 (V2015-05)
    Photo Core 2 (V2015-05)

The latest resource estimate was updated and published as part of the Preliminary Economic Assessment on June 13, 2019. It is based on a geological model that was confirmed by the 2015-2016 drill program.

The table below shows the mineral resources estimated within the Vizcachitas deposit, with an Effective Date of June 5, 2019. The estimate was based on the drill hole sample assays, geological model interpretation and geostatistical analysis employing industry standard methods and was classified in accordance to the CIM standards on Mineral Resources and Mineral Reserves (CIM 2010), as further detailed on the 2019 Preliminary Economic Assessment.

The in-pit mineral resources are reported using a 0.25% copper cut-off.

  • Measured mineral resources are 254.4 million tonnes grading 0.439% copper, 119.2 ppm molybdenum and 1.26 g/t silver giving a 0.489% copper equivalent.
  • Indicated mineral resources are 1,029.67 million tonnes grading 0.385% copper, 146.9 ppm molybdenum and 1.00 g/t silver giving a 0.442% copper equivalent.
  • Measured and Indicated mineral resources are 1,284.06 million tonnes grading 0.396% copper, 141.4 ppm molybdenum and 1.05 g/t silver giving a 0.451% copper equivalent.
  • The Inferred mineral resources are 788.82 million tonnes grading 0.337% copper, 127.0 ppm molybdenum and 0.88 g/t silver giving a 0.386% copper equivalent.

The tables below a sensitivity analysis for the mineral resources under different cut-off grades. The base case for the estimation of resources is 0.25% Cu.

Measured Resources

Cut-Off
(Cu %)

Tonnage (Mt)

Cu
(%)

Mo
(ppm)

Ag
(ppm)

CuEq
(%)

Cu
(Mlb)

Mo
(Mlb)

Ag
(Moz)

CuEq
(Mlb)

0.15

282.33

0.415

116.3

1.22

0.464

2,583

72

11.1

2,888

0.20

270.80

0.426

118.4

1.24

0.475

2,543

71

10.8

2,836

0.25

254.40

0.439

119.2

1.26

0.489

2,462

67

10.3

2,743

0.30

221.85

0.463

118.2

1.30

0.513

2,264

58

9.3

2,509

0.35

180.95

0.495

117.4

1.35

0.546

1,975

47

7.9

2,178

0.40

140.40

0.531

117.0

1.42

0.582

1,644

36

6.4

1,801

0.45

101.73

0.574

115.9

1.50

0.625

1,287

26

4.9

1,402

 

Indicated Resource

Cut-Off
(Cu %)

Tonnage (Mt)

Cu
(%)

Mo
(ppm)

Ag
(ppm)

CuEq
(%)

Cu
(Mlb)

Mo
(Mlb)

Ag
(Moz)

CuEq
(Mlb)

0.15

1,430.59

0.332

133.4

0.91

0.384

10,471

421

41.9

12,111

0.20

1,239.16

0.357

140.6

0.96

0.412

9,753

384

38.2

11,255

0.25

1,029.67

0.385

146.9

1.00

0.442

8,740

333

33.1

10,034

0.30

784.35

0.421

154.5

1.04

0.481

7,280

267

26.2

8,317

0.35

549.21

0.463

159.9

1.09

0.526

5,606

194

19.2

6,369

0.40

359.56

0.513

159.3

1.14

0.575

4,066

126

13.2

4,558

0.45

249.22

0.555

156.5

1.20

0.617

3,049

86

9.6

3,390

 

Measured and Indicated Resources

Cut-Off
(Cu %)

Tonnage (Mt)

Cu
(%)

Mo
(ppm)

Ag
(ppm)

CuEq
(%)

Cu
(Mlb)

Mo
(Mlb)

Ag
(Moz)

CuEq
(Mlb)

0.15

1,712.92

0.346

130.6

0.96

0.397

13,054

493

53.0

14,999

0.20

1,509.96

0.369

136.6

1.01

0.423

12,296

455

49.0

14,091

0.25

1,284.06

0.396

141.4

1.05

0.451

11,202

400

43.4

12,777

0.30

1,006.20

0.430

146.5

1.10

0.488

9,544

325

35.5

10,826

0.35

730.16

0.471

149.4

1.15

0.531

7,581

241

27.1

8,547

0.40

499.96

0.518

147.4

1.22

0.577

5,710

162

19.6

6,359

0.45

350.95

0.561

144.7

1.29

0.619

4,336

112

14.5

4,792

 

Inferred Resource

Cut-Off
(Cu %)

Tonnage (Mt)

Cu
(%)

Mo
(ppm)

Ag
(ppm)

CuEq
(%)

Cu
(Mlb)

Mo
(Mlb)

Ag
(Moz)

CuEq
(Mlb)

0.15

1,635.15

0.264

111.4

0.76

0.308

9,517

402

40.0

11,103

0.20

1,252.87

0.294

118.3

0.82

0.340

8,121

327

33.0

9,391

0.25

788.82

0.337

127.0

0.88

0.386

5,861

221

22.3

6,713

0.30

486.94

0.381

135.6

0.96

0.434

4,090

146

15.0

4,659

0.35

255.39

0.436

144.1

1.03

0.493

2,455

81

8.5

2,776

0.40

135.60

0.497

138.5

1.11

0.553

1,486

41

4.8

1,653

0.45

70.89

0.567

140.6

1.31

0.625

886

22

3.0

977

Notes

  • The effective date of the mineral resources is May 10, 2019
  • Copper equivalent grade has been calculated using the following expression: CuEq (%) = Cu (%) + 3.33 x Mo (%) + 82.6389 x Ag (%), using the metal prices: 3.00 USD/lb Cu, 10.00 USD/lb Mo and 17.00 USD/oz Ag. No allowance for metallurgical recoveries has been considered
  • Small discrepancies may exist due to rounding errors.
  • The quantities and grades of reported Inferred Mineral Resources are uncertain in nature and further exploration may not result in their upgrading to Indicated or Measured status.
  • Mineral Resources that are not Mineral Reserves do not have demonstrated economic viability
  • Please refer to Los Andes Coppers Ltd. news release dated June 5, 2019 for additional information
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