Overview
| Stage | Permitting |
| Mine Type | Open Pit |
| Commodities |
|
| Mining Method |
|
| Mine Life | 6 years (as of Jan 1, 2022) |
The mine environmental permitting process has been ongoing and in February 2021, the Ministry of Environment conducted their final site inspection of the Cerro Quema Project. As a result of the positive site inspection review, the Category 3 Environmental & Social Impact Assessment (“ESIA”) technical aspects were approved. |
Source:
p. 27
The Cerro Quema deposit is 100% owned by Orla Mining Ltd. (Orla) through its subsidiary Minera Cerro Quema SA (MCQ).
Contractors
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Deposit Type
- Breccia pipe / Stockwork
- Epithermal
- Porphyry
- Volcanic hosted
Summary:
The observed geological and geochemical characteristics of the La Pava and Quema-Quemita gold deposits at Cerro Quema are consistent with those of volcanic hosted, epithermal, high sulfidation (HS) gold-silver deposits.
The Cerro Quema project is spatially associated with the E-trending regional Rio Joaquin fault system. The fault zone is 30 km long and shows evidence of reverse dip-slip movement. It juxtaposedAzuero Igneous basement rocks against Azuero Arc Group rocks. Mesoscale open folds in the region have SW plunging axes and moderate limb dips, indicative of dextral transpression with dominant reverse dip-slip motion (Isaac Corral 2016). The Cerro Quema mineralized zone lies 1.5 to 3km north of the Rio Joaquin fault. Longo has postulated sinestral movement along the most prominent of the NE striking faults, possibly resulting in dismemberment of an originally continuous mineralized zone with the La Pava zone being the left lateral offset of the Quema-Quemita deposit (Longo 2018).
Distinct styles of mineralization observed today are due primarily to supergene effects on the primary mineralization. The known mineralized zones (Pava, Quema-Quemita, Idaida-Caballito, Pelona) were likely similar to Caballito before oxidation. Three mineralization styles are observed:
1. Epithermal high sulfidation Au mineralization, associated with variably intensely developed advanced argillic alteration of dacitic rocks with local areas of silicification ........
Summary:
The Project includes detailed pit designs and phases for the La Pava and Quema pits.
Mine operations are planned to be typical of similar small scale open pit operations, consisting of conventional drill, blast, load, haul, and stockpile operations. Direct Mining and Mine Maintenance is planned as Owner operated mining operations. The Owner will be responsible for all equipment mob/demob, operating, and labour costs as well as maintenance of the mining equipment. Blasting unit operations will be performed by a specific blasting company contractor. Supervision, geology and mine planning will be done by the Owner.
Both the La Pava and Quema deposit are located on steep terrain which presents opportunities and challenges for roads, phasing, and ultimate pit designs. In both pits initial haulage roads are designed to take advantage of the natural slopes and gain access to the top of deposits. These initial access haulage roads allow the pits to leave limited ramps in the final design high walls.
Quema Pit Design
The Quema ultimate pit is split into 2 phases after the access cut has been established, to begin stripping and ore mining. The access cut was designed to minimize rehandle of fill slopes within the ultimate pit limit. Any near surface ore intersected during pre-production is sent to stockpile.
Phase 1 is split into 2 sub phases for operational considerations to allow the east and central hilltops to be mined at different ........
Source:
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Flow Sheet:
Summary:
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Reserves at November 2, 2021:
Cerro Quema Mineral Reserve: The minimum cut-off grade used for ore/waste determination is NSR>= $6.34/tonne for Oxide and $9.18 for Mixed at the La Pava deposit and $6.50/tonne for Oxide and $8.35/tonne for Mixed at the Quema deposit.
| Category | OreType | Tonnage | Commodity | Grade | Contained Metal |
|
Probable
|
Oxide & Mixed
|
21.7 Mt
|
Gold
|
0.8 g/t
|
562 koz
|
|
Probable
|
Oxide & Mixed
|
21.7 Mt
|
Silver
|
2.18 g/t
|
1,526 koz
|
|
Indicated
|
Sulphide
|
31,952 kt
|
Gold
|
0.31 g/t
|
315 koz
|
|
Indicated
|
Oxide
|
31,791 kt
|
Gold
|
0.65 g/t
|
666 koz
|
|
Indicated
|
Mixed
|
2,479 kt
|
Gold
|
0.52 g/t
|
41 koz
|
|
Indicated
|
Sulphide
|
31,952 kt
|
Silver
|
2.2 g/t
|
2,260 koz
|
|
Indicated
|
Oxide
|
31,791 kt
|
Silver
|
2.01 g/t
|
2,059 koz
|
|
Indicated
|
Mixed
|
2,479 kt
|
Silver
|
2.58 g/t
|
205 koz
|
|
Indicated
|
Sulphide
|
31,952 kt
|
Copper
|
0.83 %
|
585 M lbs
|
|
Indicated
|
Sulphide
|
31,952 kt
|
Copper Equivalent
|
0.96 %
|
676 M lbs
|
|
Inferred
|
Sulphide
|
22,569 kt
|
Gold
|
0.21 g/t
|
155 koz
|
|
Inferred
|
Oxide
|
7,232 kt
|
Gold
|
0.33 g/t
|
77 koz
|
|
Inferred
|
Mixed
|
250 kt
|
Gold
|
0.39 g/t
|
3 koz
|
|
Inferred
|
Sulphide
|
22,569 kt
|
Silver
|
1.18 g/t
|
856 koz
|
|
Inferred
|
Oxide
|
7,232 kt
|
Silver
|
2.43 g/t
|
564 koz
|
|
Inferred
|
Mixed
|
250 kt
|
Silver
|
0.66 g/t
|
5 koz
|
|
Inferred
|
Sulphide
|
22,569 kt
|
Copper
|
0.77 %
|
381 M lbs
|
|
Inferred
|
Sulphide
|
22,569 kt
|
Copper Equivalent
|
0.85 %
|
425 M lbs
|
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