Overview
Status | Care and Maintenance |
Mine Type | Underground |
Commodities |
|
Mining Method |
- Bench & Fill
- Overhand Cut & Fill
|
The Mallay mine and processing plan are currently in care and maintenance mode. Premier Silver intends to conduct a thorough review of the resource base and existing mine development with a plan to bring the historical resources and reserves into current estimate status under National Instrument 43-101 and create a new mine plan that will incorporate bulk tonnage underground mining methods. This will, in turn, lead to lower mining costs and potentially greater output. |
Source:
Company | Interest | Ownership |
Premier Silver Corp.
|
100 %
|
Indirect
|
The 10,562.4-hectare Tres Cerros Au-Ag Project, Mallay Mine and processing plant are 100% owned by Premier Silver Corp.
StraightUp Resources Inc. is pleased to announce that it has entered into a right of exclusivity agreement with Premier Silver Corp.
The ROE with Premier provides that the Company and Premier will exclusively negotiate an agreement for a period of 60 days, whereby StraightUp will acquire all of the outstanding shares of Premier from the current shareholders.
Contractors
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Deposit Type
- Epithermal
- Replacement
- Vein / narrow vein
- Mesothermal
Summary:
Mallay is considered an epithermal deposit of silver, lead, zinc and limited gold values.
Mallay is a fracture-filling and replacement-type mesothermal deposit, with Ag-Pb-Zn mineralization. Many of the mineralized structures are located in quartz arenites from Farrat Formation, while another part is emplaced in Jumasha limestones. The main structure is Isguiz, emplaced in the north flank of the anticlinal of the same name. From here, a series of tensional veins run E-W. In Jumasha limestone, further north, is the Pierina veins system, with similar mineralization, but with the occurrence of gold.
The exploitation of ore is primarily focused on the following main ore structures: Isguiz body-vein (silver, lead, zinc), Pierina vein (gold), MarĂa vein (silver) and Fortuna (skarn type lead, zinc and silver).
Mining Methods
- Bench & Fill
- Overhand Cut & Fill
Summary:
The exploitation of ore is primarily focused on the area known as Isguiz. The mining method used is mainly overhand cut and fill, as well as bench and fill in some parts of the deposit. The production is recirculated to the pits and the excess material is transported to the surface. The mining is performed at five operating levels, with the lowest level in development currently being 4090. Access to the veins is gained by rail, via cross-cut shafts from the surface. The main cross-cut shaft for extraction is located at level 4150, where the ore is transported by electric locomotives and mining cars to the surface and discharged into a hopper, for transport to the concentration plant via 30-ton trucks. The mine water is drained at level 4150 to settling and treatment ponds, from where it is sent to the concentrating plant and mine.
Source:
Summary:
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Production:
All production numbers are expressed as metal in concentrate.
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Operational Metrics:
Metrics | 2018 | 2017 | 2016 | 2015 |
Ore tonnes mined
| 92,450 t | 170,519 t | 204,035 t | 158,124 t |
Reserves at December 31, 2018:
Category | Tonnage | Commodity | Grade | Contained Metal |
Proven & Probable
|
134 kt
|
Silver
|
6.56 oz/t
|
878 koz
|
Proven & Probable
|
134 kt
|
Lead
|
3.67 %
|
5 kt
|
Proven & Probable
|
134 kt
|
Zinc
|
6.74 %
|
9 kt
|
Proven & Probable
|
134 kt
|
Gold
|
0.007 oz/t
|
1 koz
|
Measured & Indicated
|
7 kt
|
Silver
|
7.37 oz/t
|
50 koz
|
Measured & Indicated
|
7 kt
|
Lead
|
2.23 %
|
0.2 kt
|
Measured & Indicated
|
7 kt
|
Zinc
|
3.42 %
|
0.2 kt
|
Measured & Indicated
|
7 kt
|
Gold
|
0.007 oz/t
|
|
Commodity Production Costs:
| Commodity | Units | 2018 | 2017 |
Cash costs (sold)
|
Lead
|
USD
|
1,603 / t
|
1,889 / t
|
Cash costs (sold)
|
Zinc
|
USD
|
2,284 / t
|
2,416 / t
|
Cash costs (sold)
|
Silver
|
USD
|
11.5 / oz
|
13.3 / oz
|
Financials:
| Units | 2018 | 2017 |
Capital expenditures
|
M USD
|
1.8
|
1.8
|
Revenue
|
M USD
|
16.7
|
36.7
|
Operating Income
|
M USD
|
-4.5
|
0
|
Gross profit
|
M USD
|
1.4
|
4.4
|
Pre-tax Income
|
M USD
|
-4.6
|
-0.1
|
After-tax Income
|
M USD
|
-4.6
|
-0.2
|
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Staff:
Employees | Contractors | Total Workforce | Year |
|
|
|
2020
|
|
|
|
2018
|
Corporate Filings & Presentations:
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