Drilling

DRILLING

A total of 165 diamond drill holes have been drilled on the Property since 1993, totalling 52,256 metres.

The first drill holes were drilled in 1993 by Placer Dome. Placer Dome completed six diamond drill holes totalling 1,953 m. The drill holes are numbered VP-1 to VP-6.The objective of the program was to evaluate the Property for its porphyry copper potential.

Between 1995 and 1998, General Minerals Corporation completed 61 diamond drill holes for a total of 15,815 m. The drill program was intended to further evaluate the mineralized area identified by Placer and to develop a mineral resource. The drill holes were numbered from V-1 to V-63.

Los Andes Copper completed at total of 79 diamond drill holes, totalling 22,616 m, between July 2007 and October 2008. The Los Andes Copper drilling was carried out to refine the geological model, evaluate the continuity of mineralization, evaluate possible deposit extensions and confirm the mineralization defined by the prior drill campaigns. No drill holes were drilled within the San José 1/3000 claim area. At the time of the drill campaign Los Andes Copper only owned of 51 % of this claim area. To better understand the project, the Los Andes geologists re-logged all of the 146 drill holes located within the property and prepared a new geological model. This model was drill tested in 2015/2016 with a total of 8 drill holes and 3,610 meters. These drill holes were drilled within the San José 1/3000 claim area, the first time this area had been drilled since 1997. After the success of the 2015/2016 campaign, a further 11 holes were drilled during 2017, totalling 8,262 metres.

The historical drilling was generally drilled through the supergene mineralisation and then then only a short distance in the primary mineralisation. This means that there are various drill holes, especially in the central core where the drill holes finished in grades above 0.5 % Cu or in geological units which indicate that the drill hole is still in the upper part of the system. This detailed review showed that the historical logging and geological model had not properly identified the importance of the higher grade early diorite porphyry and hydrothermal breccias.

Table summarising the different drilling campaigns

Description

Year

No. of Drill Holes

Total Meterage (m)

Placer Dome

1993

6

1,953

General Minerals

1996 / 1997

61

15,815

Los Andes Copper

2007 / 2008

79

22,616

Drill holes used in 2014 resource estimate

 

146

40,384

Los Andes Copper

2015 / 2016

8

3,610

Los Andes Copper

2017

11

8,262

Total

 

165

52,256

 

New Geological Sections

  • Vertical Section 1600 looking North
    Vertical Section 1600 looking North
  • Vertical Section 2100 looking North
    Vertical Section 2100 looking North

 

 


2015 / 2016 Drill Program Selected Intersections

 

Hole Number Length (m) Depth Downhole
From (m)
Cu % Mo ppm Ag g/t CuEq %*
V2015-08 502.0 130.0 0.63% 209 1.3 0.70%
including 54.0 130.0 1.02% 128 1.4 1.07%
including 37.0 198.8 0.92% 132 2.0 0.98%
including 396.3 235.8 0.57% 233 1.2 0.64%
V2015-03 39.1 44.1 0.74% 145 1.9 0.80%
V2015-05 52.1 492.2 0.81% 190 2.0 0.89%
V2015-05 120.0 72.0 0.54% 169 1.4 0.60%
V2015-02 52.0 142.0 0.60% 170 1.8 0.66%
V2015-01 64.0 322.0 0.60% 258 1.2 0.68%

* Copper equivalent grade has been calculated using the following expression: Cu Eq (%) = CuT (%) + 2.5 x Mo (%) + 110.55 x Ag (g/t), using the metal prices: $ 2.2 / lb. Cu, $5.5 / lb. Mo and $15.2 / Oz Ag. All thicknesses from intersections from drill holes are down-hole drilled thicknesses. True widths cannot be determined from the information available.

2017 Drill Program Selected Intersections

Hole Number

Length
(m)

Depth Downhole
From (m)

Cu
%

Mo
 ppm

Ag
g/t

CuEq
%

V2017-01A

302.1

71.9

0.55

115

1.4

0.59

including

134.0

226.0

0.60

150

1.5

0.65

 

 

 

 

 

 

 

V2017-04

90.0

92.0

0.51

127

1.6

0.56

 

 

 

 

 

 

 

V2017-05

90.0

170.0

0.49

231

1.0

0.56

V2017-05

80.0

798.0

0.53

285

1.9

0.63

 

 

 

 

 

 

 

V2017-06

440.0

64.0

0.51

164

1.1

0.56

including

56.0

76.0

0.81

72

1.6

0.85

 

 

 

 

 

 

 

V2017-07

102.0

44.0

0.62

157

1.5

0.66

 

 

 

 

 

 

 

V2017-09B

77.6

64.4

0.52

153

1.3

0.57

 

 

 

 

 

 

 

V2017-10

506.0

486.0

0.57

357

1.1

0.67

including

76.0

514.0

0.69

522

1.5

0.84

including

88.0

684.0

0.70

278

1.4

0.78

including

60.0

924.0

0.73

341

1.5

0.83

* Copper equivalent grade has been calculated using the following expression: Cu Eq (%) = CuT (%) + 2.5 x Mo (%) + 110.55 x Ag (%), using the metal prices: $ 2.2 / lb. Cu, $5.5 / lb. Mo and $15.2 / Oz (same reference prices as in reporting of 2015/2016 results). All thicknesses from intersections from drill holes are down-hole drilled thicknesses. True widths cannot be determined from the information available.

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