Overview
Status | Inactive / Suspended |
Mine Type | Open Pit |
Commodities |
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Mining Method |
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Mine Life | 15 years (as of Jan 1, 2012) |
December 05, 2022, the Argonaut entered into the Option Agreement with Heliostar and Compañía Minera Pitalla, which holds the title to the San Antonio Gold Project. Under the terms of the Option Agreement, Heliostar has the Option to earn a 100% interest in and to the San Antonio Gold Project.
Development is currently paused due to a pending environmental permit. Heliostar will earn the option to acquire a 100% interest in the project by obtaining this permit. |
Source:
p. 1
The Argonaut owns 100% of the San Antonio Project as its foreign operations in Mexico.
December 5, 2022 - Heliostar Metals Limited is pleased to announce that it has entered into a binding option agreement (the "Option Agreement") with Argonaut and its wholly owned subsidiary, Compañía Minera Pitalla S.A. de CV ("Compañía Minera Pitalla"), pursuant to which it has been granted an option (the "Option") to acquire a 100% interest in the San Antonio Gold Project. Both projects are located in Mexico.
Contractors
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Deposit Type
- Breccia pipe / Stockwork
- Orogenic
Summary:
The mineralization has been identified over approximately 1.8 km of strike length at the Project and has been subdivided into four fault-bounded zones referred to as Los Planes, Intermediate, Las Colinas, and La Colpa, Los Planes is the best known of the areas and is the most densely drilled. Local normal and listric faulting displaces and truncates the mineralized zones (Herdrick, 2009). Much of the outcrop is covered by pediment that thickens to the east, featuring cobbles and boulders of schist and gneiss.
Los Planes
Mineralization extends along a north-south strike length of approximately 800 m. Drilling has encountered continuous mineralization to depths of 380 m from the surface. Mineralization generally varies between 1 and 20 m in thickness. Mineralization thickness is highly variable due to the stockwork-style of mineralization, and zones can locally coalesce into broader intervals over 100 m in thickness. Mineralization is interpreted to be open along strike to the north and at depth. Mineralization is hosted in diorites and gabbros within a large shear zone that dips between 75º and 45º to the west and horizontally to very shallowly to the east. The shear zone is broken into subunits that are defined by their structure, alteration, and degree of mineralization.
Las Colinas & Intermediate
Las Colinas and Intermediate zones appear to be genetically related, and are separated by postmineral normal faults that effectively truncate minera ........

Summary:
The pits are designated as North or Los Planes, Intermediate and Las Colinas pits; the North Pit was designed with three phases. The resulting pit designs defined 60.2 Mt of Measured and Indicated resource with an average grade of 0.85 g/t Au and 0.5 Mt of Inferred resources averaging 0.84 g/t Au. The average strip ratio is 3.1:1. At a 4 MTPY production rate, it is expected the potential mine life to be in excess of 15 years. The production schedule targeted a consistent total mine tonnage of approximately 18 MTPY.
The final dimensions of the proposed open pits detail the potential size of the operation and are not limited by infrastructure restrictions. Potential restrictions may include additional required permitted space for future heap leach pads and partial relocation of the highway that connects the towns of San Antonio and San Juan de los Planes.
Dimensions of the North Pit are 1200m north-south and 800 m east-west. The Intermediate pit is 400m x 400m and it merges with the North Pit where both pits share the main ramp. The Colinas pit is located to the south of the Intermediate Pit and has a dimension of 650 m in the north-south direction and 400 m in the west-east direction.
Two primary waste dumps are located to store waste from the North, Intermediate and Las Colinas pits. The North waste dump is located 100 m west and north of the North Pit, and will contain the waste rock produced by the North pit and part of the Intermediate pit ........

Source:

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Flow Sheet:
Summary:

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Projected Production:
Commodity | Units | Avg. Annual | LOM |
Gold
|
koz
| 74 | 1,046 |
* According to 2012 study.
Reserves at December 31, 2020:
Cut-off grades are 0.11 g/t Au for oxide and transition and 0.15 g/t Au for sulphide ore.
Category | Tonnage | Commodity | Grade | Contained Metal |
Measured & Indicated
|
65 Mt
|
Gold
|
0.86 g/t
|
1,735 koz
|
Inferred
|
6.2 Mt
|
Gold
|
0.34 g/t
|
67 koz
|
Corporate Filings & Presentations:
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