Overview
Stage | Preliminary Economic Assessment |
Mine Type | Open Pit |
Commodities |
|
Mining Method |
|
Mine Life | 13.2 years (as of Jan 1, 2023) |
The PEA results only consider the open heap leach minable resources on the El Tigre property and do not consider the underground potential of the property.
In 2024 Silver Tiger Metals is planning the next steps regarding to the El Tigre Project:
* to complete drill program during the first half of the year; * to deliver a Prefeasibility Study and an updated Mineral Resource Estimate during Q2; * to deliver a Preliminary Economic Assessment for the permitted underground resource during Q3. |
Source:
p. 22
The El Tigre Property consists of 59 Mexican Federal mining concessions: 4 of the concessions are owned by Compañía Minera Talaman S.A. de C.V. (Talaman) and 55 are owned by Pacemaker Silver Mining S.A. de C.V. (Pacemaker).
Pacemaker, a subsidiary of Silver Tiger, indirectly holds 100% interest in the remaining four concessions through its 100% ownership of Talaman, so that all of concessions are currently controlled by Silver Tiger.
Contractors
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Deposit Type
- Vein / narrow vein
- Epithermal
Summary:
Deposit Type
The El Tigre silver and gold deposit is related to a series of high-grade epithermal veins controlled by a north-south trending faults, which cut across the andesite and rhyolite tuffs of the Sierra Madre Volcanic Complex, within a propylitic alteration zone, as much as 150 m in width, in the El Tigre Formation. The veins dip steeply to the west, although steep dip reversals to the east occur locally, and are typically 0.5 m wide, but locally can be up to five metres in width. The veins, structures and mineralized zones outcrop on surface and have been traced for 5.3 km along strike. Historical mining and exploration activities focused on the 1.5 km portion at the southern end of the deposit, principally on the El Tigre, Seitz Kelly and Sooy Veins, whereas the Caleigh, Benjamin, Protectora and Fundadora Veins to the north remain under explored.
There are two types or styles of silver and gold mineralization found in the El Tigre area. The first and best-known are the fissure veins that host silver, lead, zinc, copper, and gold mineralization within a narrow, 5.3 km long, north-trending belt. The second is the undeveloped low grade stockwork halo near the veins. This mineralization is associated with fractured volcanic rocks and occurs as stockwork veinlets containing minor quartz, pyrite, chalcopyrite, sphalerite and galena. These systems usually have basic to neutral pH fluids enriched in potassium and silica. Very little evidence of boiling has ........
Summary:
Micon evaluated the open pit mining for this PEA report, with no underground mining included at this time. The open pit mine is based on the truck and shovel method of operations, utilizing various types of equipment to drill and blast material, load and haul broken feed to a crusher and waste to a dump location. Heap leaching is utilized to process the feed material to extract gold and silver.
Pit Design Parameters
Hexagon’s MinePlan Pit Design Tool was utilized to create phased designs based on the parameters listed below in Table 16.5. The bench height was set at 5 m, double benching to 10 m height between berms of 4.25 m width. The ramp/road width was 10 m with a maximum ramp gradient of 10%. The overall slope angle was 50°, resulting in 70° face slope angles with the other parameters.
Pit Design Results
The pit design follows closely the ultimate pit shell in most areas, with the exception of requirements of additional space for ramps. With significant waste above the deposit on the east side of the pit in the undulating mountain peaks ramps were design on the west walls as much a possible to keep from shallowing the pit slope to the east. The majority of the ROM heap leach feed is on the lower west side of the pit with waste on the east half and up the steep mountain side. The Indicated material (cyan) is generally the centre of the deposit with the inferred material (dark blue) around the edges and in the outlying thinner veins.
........
Source:
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Flow Sheet:
Summary:
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Source:
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Reserves at September 12, 2023:
The resource estimation was reported using the pit constrained AuEq cut-off grade of 0.14 g/t, the out-of-pit AuEq cut-off grade of 1.5 g/t AuEq, and the tailings AuEq cut-off grade of 0.30 g/t.
Category | Tonnage | Commodity | Grade | Contained Metal |
Indicated
|
46,367 kt
|
Gold
|
0.39 g/t
|
575 koz
|
Indicated
|
46,367 kt
|
Silver
|
25 g/t
|
37,212 koz
|
Indicated
|
46,367 kt
|
Gold Equivalent
|
0.77 g/t
|
1,147 koz
|
Indicated
|
46,367 kt
|
Copper
|
0.01 %
|
9.4 M lbs
|
Indicated
|
46,367 kt
|
Lead
|
0.03 %
|
35.5 M lbs
|
Indicated
|
46,367 kt
|
Zinc
|
0.06 %
|
64.3 M lbs
|
Indicated
|
46,367 kt
|
Silver Equivalent
|
57.7 g/t
|
86,014 koz
|
Inferred
|
20,871 kt
|
Gold
|
0.56 g/t
|
373.7 koz
|
Inferred
|
20,871 kt
|
Silver
|
78.4 g/t
|
52,619 koz
|
Inferred
|
20,871 kt
|
Gold Equivalent
|
1.79 g/t
|
1,204 koz
|
Inferred
|
20,871 kt
|
Copper
|
0.04 %
|
18.1 M lbs
|
Inferred
|
20,871 kt
|
Lead
|
0.13 %
|
59.7 M lbs
|
Inferred
|
20,871 kt
|
Zinc
|
0.22 %
|
103.4 M lbs
|
Inferred
|
20,871 kt
|
Silver Equivalent
|
134.5 g/t
|
90,277 koz
|
Required Heavy Mobile Equipment as of October 27, 2023:
HME Type | Size | Leased or Contractor |
Truck (haul)
|
90 t
|
|
Corporate Filings & Presentations:
Document | Year |
...................................
|
2024
|
...................................
|
2023
|
...................................
|
2023
|
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