Cangrejos Overview

Summary

  • Ownership 100%
  • Located 40 km to commercial port of Puerto Bolivar
  • Power to camp from national grid
  • Sparsely populated, constructive ongoing relations with local community
  • 1st round of metallurgical testwork completed Nov 2015 (83% Au / 83% Cu); 2nd round underway
  • PEA is underway and is expected in Q2 2018
  • Inferred Mineral Highlights (see news release dated Nov 6 NR17-10)
    • 423 Million tonnes of 0.85 g/t AuEq
    • Deposit remains open to further drilling to the north, south, west and at depth
  • Contained Metal within Inferred Resource at 0.35 AuEq (g/t) Cut-off:
    • 8.8 Moz Au
    • 1.1 Blbs Cu
    • 8.3 Moz Ag
  • NI 43-101 Technical Report filed within 45 days of November 6th

Location & Access

The Cangrejos project is located in El Oro province, SW Ecuador, 30 km SE of the provincial capital of Machala and the Pan American Highway and 40 km from the deep water commercial port of Puerto Bolivar. Access to the property is via paved and 8 km of gravel roads. The company has a field camp and core facility located on the property.

Location Map

Region

Lumina's Cangrejos project is located in the Andean foothills of El Oro province, in southwestern Ecuador. El Oro province has a long established history of mining, which is a way of life in many areas.

In 1994 Lumina (formerly Odin Mining) identified the Cangrejos area as the source of the Biron alluvial gold deposit which yielded 69,000 ounces of gold. A joint venture was formed with Newmont and during the period 1994 to 2001 geophysical and geochemical surveys were completed and anomalies were tested by diamond drilling. The Cangrejos zone was discovered by hole CC-99-14 which intersected 1.57 g/t Au over 192m.

Mineralization

Gold +/- copper mineralization in southern Ecuador is associated with:

  • granitic intrusions of various ages
  • Deposits are low grade, bulk tonnage Cu-Au porphyries or higher grade epithermal Au veins

At Cangrejos, porphyry style Au-Cu mineralization is associated with a sequence of intercalated porphyritic dioritic intrusions and hydrothermal breccias. Better Au grades correlate with potassic alteration and chalcopyrite-bornite occurring as fine disseminations and in quartz veins. This northeast trending zone was discovered by Newmont in 1999 and tested by 3 Odin drill holes in 2011.

Inferred Resource

Cut-Off AuEq
(g/t)

Million Tonnes

Average Grade

Contained Metals

AuEq
(g/t)

Au
(g/t)

Cu
(%)

Ag
(g/t)

Mo
(ppm)

Au
(Moz)

Cu
(Mlbs)

Ag
(Moz)

Mo
(Mlb)

0.25

459

0.81

0.62

0.11

0.6

23.7

9.1

1,082

8.8

24

0.30

441

0.83

0.63

0.11

0.6

24.3

9.0

1,069

8.5

24

0.35
(Base Case)

423

0.85

0.65

0.11

0.6

24.8

8.8

1,053

8.2

23

0.40

404

0.87

0.67

0.12

0.6

25.2

8.7

1,042

7.9

22

0.45

382

0.90

0.69

0.12

0.6

25.6

8.4

1,010

7.5

22

0.50

357

0.93

0.71

0.12

0.6

26.1

8.1

976

7.1

21

0.55

330

0.96

0.73

0.13

0.6

26.6

7.8

939

6.8

19

0.60

302

0.99

0.76

0.13

0.7

27.2

7.4

891

6.3

18

(1) The mineral resource estimate has an effective date of January 25, 2017.

(2) Mineral resources do not have demonstrated economic viability. The estimate of mineral resources may be materially affected by environmental, permitting, legal, title, taxation, sociopolitical, marketing, or other relevant issues.

(3) The quantity and grade of reported Inferred mineral resources in this estimation are conceptual in nature and there has been insufficient exploration to define these Inferred mineral resources as an Indicated or Measured mineral resource.

(4) The mineral resources in this estimate were calculated with the Canadian Institute of Mining, Metallurgy and Petroleum (CIM), CIM Standards on Mineral Resources and Reserves, Definitions and Guidelines prepared by the CIM Standing Committee on Reserve Definitions.

(5) Gold equivalent values were calculated using the following prices: for gold a price of US$ 1,250 per ounce, for copper a price of US$ 2.50 per pound, for molybdenum a price of US$ 7.00 per pound and for silver a price of US$ 17 per ounce. Gold equivalent values can be calculated using the following formula: AuEq (g/t) = Au (g/t) + Ag (g/t) x 0.0137 + Cu (%) x 1.371 + Mo (ppm)/10,000 x 3.840.

(6) The Inferred mineral resources are contained within a limiting pit shell and comprise a coherent body.

Qualified Person

Leo Hathaway, P.Geo, a "qualified person" within the definition of that term in NI 43-101, has reviewed and approved the scientific and technical information contained on this page.