Source:
p. 26,182,237
Company | Interest | Ownership | Investor's Info |
BHP Group Ltd.
|
100 %
|
Indirect
|
|
Compania Minera Cerro Colorado Ltd.
(operator)
|
100 %
|
Direct
|
|
BHP ownership: 100 percent.
Operator: BHP.
Summary:
The Cerro Colorado porphyry copper deposit is the northernmost currently active copper mine in Chile. It belongs to one of the Paleocene to early Eocene porphyry copper deposits that are distributed along the western slope of the main Andean Cordillera in Northern Chile.
The geological evolution of Cerro Colorado area can be generalized as follows. The Cretaceous Cerro Empexa Formation, consisting of a sequence of volcanic rocks, mainly andesitic lava and breccia, lahars, some ignimbrite intercalations and dacitic tuff, was intruded by tonalitic to dioritic magma in Middle-Eocene. Magmatic activities generated brecciated rocks accompanying with different alteration zones radiate outward from the intrusion. The mineralized hypogene protore later interacted with ground water, creating the supergene blanket, which is now the principal mining target of Cerro Colorado.
Summary:
Cerro Colorado is Open-cut. Enriched and oxidised porphyry copper deposit containing in situ copper oxide mineralisation that overlies a near-horizontal sequence of supergene sulphides, transitional sulphides and finally primary (hypogene) sulphide mineralisation.
Processing
- Crush-and-stack plant
- Heap leach
- Solvent Extraction & Electrowinning
Flow Sheet:
Summary:
Cerro Colorado produces copper cathodes. Crushing facilities, dynamic leach pads, solvent extraction plant, electrowinning plant. Nominal capacity of tank house: 130 ktpa copper cathode.
Recoveries & Grades:
Commodity | Parameter | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
Copper
|
Head Grade, %
| ......  | ......  | ......  | 0.59 | 0.6 | 0.77 | 0.71 |
Reserves at June 30, 2021:
Cut-off criteria:
Mineral Resources: Oxide & Supergene Sulphide - 0.30%TCu, Transitional Sulphide - 0.20%TCu, Hypogene Sulphide - 0.20%TCu.
Ore Reserves: Oxide & Supergene Sulphide - 0.30%TCu, Transitional Sulphide - 0.30%TCu
Category | OreType | Tonnage | Commodity | Grade |
Proven
|
Oxide
|
6.6 Mt
|
Copper
|
0.46 %
|
Proven
|
Supergene sulphide
|
6.1 Mt
|
Copper
|
0.54 %
|
Proven
|
Transitional sulphide
|
10 Mt
|
Copper
|
0.5 %
|
Probable
|
Oxide
|
0.4 Mt
|
Copper
|
0.42 %
|
Probable
|
Supergene sulphide
|
0.7 Mt
|
Copper
|
0.48 %
|
Probable
|
Transitional sulphide
|
0.6 Mt
|
Copper
|
0.46 %
|
Proven & Probable
|
Oxide
|
7 Mt
|
Copper
|
0.46 %
|
Proven & Probable
|
Supergene sulphide
|
6.8 Mt
|
Copper
|
0.53 %
|
Proven & Probable
|
Transitional sulphide
|
11 Mt
|
Copper
|
0.5 %
|
Measured
|
Oxide
|
71 Mt
|
Copper
|
0.61 %
|
Measured
|
Supergene sulphide
|
48 Mt
|
Copper
|
0.6 %
|
Measured
|
Transitional sulphide
|
81 Mt
|
Copper
|
0.45 %
|
Indicated
|
Oxide
|
110 Mt
|
Copper
|
0.64 %
|
Indicated
|
Supergene sulphide
|
87 Mt
|
Copper
|
0.61 %
|
Indicated
|
Transitional sulphide
|
105 Mt
|
Copper
|
0.42 %
|
Inferred
|
Oxide
|
6 Mt
|
Copper
|
0.59 %
|
Inferred
|
Supergene sulphide
|
20 Mt
|
Copper
|
0.66 %
|
Inferred
|
Transitional sulphide
|
26 Mt
|
Copper
|
0.43 %
|
Inferred
|
Hypogene sulphide
|
1,610 Mt
|
Copper
|
0.37 %
|
Total Resource
|
Oxide
|
187 Mt
|
Copper
|
0.63 %
|
Total Resource
|
Supergene sulphide
|
155 Mt
|
Copper
|
0.61 %
|
Total Resource
|
Transitional sulphide
|
212 Mt
|
Copper
|
0.43 %
|
Total Resource
|
Hypogene sulphide
|
1,610 Mt
|
Copper
|
0.37 %
|
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