Overview
Stage | Production |
Mine Type | Underground |
Commodities |
|
Mining Method |
- Longhole open stoping
- Transverse stoping
- Longitudinal stoping
- Cemented backfill
- Backfill
|
Production Start | ...  |
Mine Life | 7 years (as of Jan 1, 2022) |
The Aranzazu mine is an underground copper mine operation, producing gold and silver as by-products. Aranzazu is one of the most important mineral deposits in the state of Zacatecas, Mexico. |
Source:
p. 21
Company | Interest | Ownership |
Aura Minerals Inc.
|
100 %
|
Indirect
|
Aranzazu Holding S.A. de C.V.
(operator)
|
100 %
|
Direct
|
Aura Minerals holds the Aranzazu Property indirectly through its 100% owned subsidiary Newington Corporation S.L. (Newington) which, in turn, holds 100% of the Aranzazu Property through its Mexican subsidiary Aranzazu Holding S.A. de C.V. (Aranzazu Holding).
Aranzazu Holding S.A. de C.V. (“Aranzazu Holding”), the operating entity for the Aranzazu Mine.
Contractors
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Summary:
The Concepcion Del Oro district represents a porphyry copper deposit that has been eroded down to a relatively deep level, as evidenced by the outcropping skarn alteration. Skarn alteration is barren unless the skarn is overprinted by the later porphyry style alteration marked by propylitic, phyllic and potassic alteration types. Trace metal geochemistry supports the classification of Concepcion del Oro as a porphyry deposit. Strongly anomalous bismuth, tellurium, arsenic and antimony are present and are typical trace metal assemblages associated with porphyry copper deposits. This trace metal assemblage is most anomalous in areas of phyllic and potassic alteration.
The mineralization in Aranzazu has a strike length of 1.5 km, a width of up to 250 m and depth extents up to 600 m. The Aura Minerals’ exploration and definition drilling shows that mineralization is closing off at BW, Mexicana and AA but open at depth in Glory Hole Porfido zone. The deepest drilling conducted to date was carried out by Aura Minerals indicated the presence of strong copper mineralization at an elevation of 1,500 m, or 600 m below surface.
Copper, gold and silver mineralization occurs in a porphyry alteration assemblage related to the intrusion of an igneous rock complex consisting of quartz monzonitic to granodioritic rocks. The igneous rocks have intruded a sequence of Jurassic to Cretaceous limestones and siltstones. The sedimentary rocks have undergone contact metaso ........

Mining Methods
- Longhole open stoping
- Transverse stoping
- Longitudinal stoping
- Cemented backfill
- Backfill
Summary:
The Aranzazu underground mine is accessed by two portals which are near the processing plant. Main ramps, driven at 5.0 m high by 5.0 m wide are used to access the underground workings. For the re-start plan, two new ramps are designed to access the GHFW and GHHW zones. Ramps are designed at the same dimensions, with an average gradient of approximately 14.2%.
Mining will be carried out using the Long Hole Open Stope (LHOS) mining method to extract the ore. Stopes will be extracted in a transverse method (perpendicular to the strike of the orebody) using a primary/secondary stope configuration. In this mining method, haulage galleries are developed parallel to the ore zones on each production level as defined by the sub-level interval. Sub-level intervals are designed between 25 m to 30 m to minimize the amount of waste development on the sub-levels. While the majority of the stopes will be mined transverse, there are some areas that will allow the ore to be extracted in a longitudinal approach. Stopes are to be filled with cemented rockfill for primary and uncemented waste material for secondary stopes.
The sequence for both development and production activities was developed and the appropriate rates and production targets were applied to achieve the required schedule of activities. During the first year, development will focus on the GHFW ramp and level development, as well as establishing access to the existing mining zone. Ore production will begi ........

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Flow Sheet:
Summary:

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Reserves at December 31, 2022:
Mineral Resources stated at a cut-off of US$50/t NSR.
Mineral Reserve: the NSR cut-off US$64/t is based on the total predicted operating cost.
Category | Tonnage | Commodity | Grade | Contained Metal |
Proven & Probable
|
9,572 kt
|
Copper
|
1.23 %
|
259,004 k lbs
|
Proven & Probable
|
9,572 kt
|
Gold
|
0.81 g/t
|
249 koz
|
Proven & Probable
|
9,572 kt
|
Silver
|
17.61 g/t
|
5,419 koz
|
Measured & Indicated
|
15,072 kt
|
Copper
|
1.44 %
|
477,490 k lbs
|
Measured & Indicated
|
15,072 kt
|
Gold
|
0.97 g/t
|
471 koz
|
Measured & Indicated
|
15,072 kt
|
Silver
|
21.43 g/t
|
10,386 koz
|
Inferred
|
4,324 kt
|
Copper
|
1.04 %
|
99,051 k lbs
|
Inferred
|
4,324 kt
|
Gold
|
0.55 g/t
|
76 koz
|
Inferred
|
4,324 kt
|
Silver
|
16.37 g/t
|
2,276 koz
|
Pipelines and Water Supply
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