Overview
Stage | Production |
Mine Type | Underground |
Commodities |
|
Mining Method |
- Mechanized Cut & Fill
- Cut & Fill
- Longhole stoping
- Resue mining
- Unconsolidated hydraulic fill
|
Production Start | ... |
Mine Life | 2028 |
The Valenciana Mines Complex (VMC) includes the Guanajuato mine, the San Ignacio mine and the Cata mill facility and was acquired by Guanajuato Silver on August 4,2022.
VMC and Cata were put on care and maintenance by previously owner in November 2021 due to a lack of tailings capacity. Guanajuato Silver has reviewed and evaluated the original permit submissions and, if economic, will be preparing a new submission to implement dry stacking at VMC for the expansion of the tailings capacity.
VMC recommenced production in August 2022, Recommissioning of the Cata plant began in December 2022 with processing at the plant commencing in January 2023. |
Latest News | Guanajuato Silver Increases Size of Gold Loan Credit Facility to US$13.3M February 29, 2024 |
Source:
p. 11,12
On August 4, 2022, Guanajuato Silver acquired 100% of Great Panther Mining’s Ltd.’s Mexican subsidiary, Minera Mexicana Rosario S.A. de C.V. which holds the Valenciana Mine Complex. Minera Mexicana El Rosario, SA de C.V. operates the Valenciana Mine Complex.
Contractors
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Deposit Type
- Epithermal
- Vein / narrow vein
- Breccia pipe / Stockwork
Summary:
The primary deposit type of interest at the VMC Property is low sulphidation epithermal
silver-gold mineralization.
Guanajuato
The Veta Madre quartz-adularia vein/breccia system is closely associated with the Veta Madre fault and an associated diorite dyke (thickness varying from discontinuous lenses at Guanajuatito to a 50-100 m thick body in the Cata, Los Pozos and Santa Margarita areas), oriented 325-degrees with a 45-degree southwest dip. The Veta Madre forms along the dyke contacts, and in the footwall Esperanza Formation.
The mineralizing event is thought to have taken place during the early Oligocene, a period of intense felsic volcanic activity in the area and comprised three stages. The three stages are summarized as follows: i) the first stage of mineralization consists of trace silver and gold with accessory quartz and adularia; ii) the second stage comprises an early silverrich phase associated with adularia, as well as a later low-silver variant, which is typified by calcite and quartz; iii) the final “post-mineralization” stage is precious metal poor, with accessory calcite, dolomite, and fluorite. Zone thickness ranges from centimeter-scale to tens of meters.
The vertical extent of the deposits at Guanajuato spans over 600 m. Mineralization occurring above the 2,100 m elevation was termed “upper ore”, between 2,100 m and 1,700 m “lower ore”, and below the 1,700 m elevation “deep ore” (Randall et al., 1994). Fluid in ........
Mining Methods
- Mechanized Cut & Fill
- Cut & Fill
- Longhole stoping
- Resue mining
- Unconsolidated hydraulic fill
Summary:
Valenciana Mine Complex (VMC, formerly known as the Guanajuato Mine Complex or GMC) comprises the Guanajuato and San Ignacio operations. Typically, all zones at the VMC are extracted by the Cut & Fill mining method.
Continuing operations at VMC will be achieved through the backfilling of tailings underground using a hydraulic fill system that will make use of select voids and open stopes that have been created at VMC over the past 450 years of underground mining.
The Guanajuato Silver will benefit from increased operational efficiency through the use of the newly refurbished StopeMate as the Guanajuato Silver can now employ longhole stoping as a mining method where appropriate.
Longhole stoping is used to extract mineralized material from an underground mine by drilling a pattern of closely spaced, parallel holes into the mineralized material and then blasting the mineralized material between the holes. The StopeMate drill is designed to drill these closely spaced, parallel holes quickly and efficiently from a single position. This ensures that the holes are drilled straight and parallel, which is important for extracting mineralized material more effectively, with less dilution and lower costs. The long hole drill is commonly used for underground bulk mining which will be applied in stopes over 1.5 meters in width, this will allow the Guanajuato Silver to increase production in approximately 25% of the production areas of the mine.
Source:
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Flow Sheet:
Summary:
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Source:
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Production:
GSilver began consolidating the operating results, cash flows and net assets of Minera Mexicana El Rosario S.A. De C.V from August 4, 2022, onwards. Production from August 4, 2022, to December 31, 2022 is as follows: Silver is 4,653oz; Gold is 110oz; Silver Equivalent is 13,104oz.
Commodity | Units | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 |
Silver
|
oz
| ...... | ...... * | ...... | ...... | ...... | 1,096,757 | 1,386,964 |
Gold
|
oz
| ...... | ...... * | ...... | ...... | ...... | ...... | ...... |
Silver Equivalent
|
oz
| | | ...... | ...... | ...... | ...... | ...... |
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Operational Metrics:
Metrics | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 |
Ore tonnes mined
| ...... | | ...... | ...... | 185,587 t | 301,014 t |
Tonnes milled
| ...... | | ...... | ...... | 187,610 t | 300,624 t |
Daily milling capacity
| ...... | ...... | ...... | ...... | | |
Daily milling rate
| ...... | ...... | ...... | ...... | | |
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Reserves at July 31, 2021:
Guanajuato mine: Cut-offs are based on the marginal operating costs per mining area being US$135.70/tonne for Cata, US$135.70/tonne for Santa Margarita, US$96.50/tonne for Los Pozos, US$124.90/tonne for Guanajuatito, US$148.50/tonne for Promontorio, and US$113.10/tonne for Valenciana.
San Ignacio mine: Cut-offs are based on the marginal operating costs per mining area being US$127.40/tonne for San Ignacio.
Category | Tonnage | Commodity | Grade | Contained Metal |
Measured & Indicated
|
519,493 t
|
Silver
|
196 g/t
|
3,269,927 oz
|
Measured & Indicated
|
519,493 t
|
Gold
|
2.3 g/t
|
38,386 oz
|
Measured & Indicated
|
519,493 t
|
Silver Equivalent
|
391 g/t
|
6,537,755 oz
|
Measured & Indicated
|
519,493 t
|
Gold Equivalent
|
4.61 g/t
|
76,915 oz
|
Inferred
|
665,977 t
|
Silver
|
194 g/t
|
4,149,076 oz
|
Inferred
|
665,977 t
|
Gold
|
2.42 g/t
|
51,876 oz
|
Inferred
|
665,977 t
|
Silver Equivalent
|
400 g/t
|
8,558,540 oz
|
Inferred
|
665,977 t
|
Gold Equivalent
|
4.7 g/t
|
100,689 oz
|
Heavy Mobile Equipment as of December 31, 2022:
HME Type | Quantity |
Drill (long hole)
|
.......................
|
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Corporate Filings & Presentations:
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News:
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