Summary

Mine Type	Stockpile
Status	Closing / Closed
Commodities	Gold Silver
Mining Method	Truck & Shovel / Loader
Production Start	...
Snapshot	Mining activities at Rodeo’s pit concluded during the second quarter of 2023. Processing of mined material ended in Q3 2023. Golden Minerals do not believe this property has material residual economic value, other than as an exploration property. All operating activity at Rodeo and Plant II concluded by September 30, 2023.

Deposit type

• Epithermal
• Vein / narrow vein

Summary:

The Rodeo property hosts gold- and silver-bearing mineralization commonly associated with a low-sulfidation (adularia-sericite) epithermal mineralizing system. Epithermal systems are defined to occur from depths of less than 2 km to superficial hot spring settings. Mineral deposition occurs as hydrothermal fluids undergo cooling and degassing and are commonly zoned vertically over 250 to 350 m from a base metal-poor, gold- and silver-rich top to a relatively silver-rich base metal zone and an underlying base metal-rich zone grading at depth into a sparse base metal, pyritic zone.

The immediate Rodeo deposit area is approximately 300 m along strike and 200 m wide and extends to a depth of 200 m below surface. The deposit strikes at 330° and dips to the ENE with various vein phases dipping from sub-vertical to 30°. The deposit is entirely hosted within Tertiary Rodeo volcanics that are strongly silicified and brecciated. The deposit is bounded to the east by the Rodeo Fault, however drilling to date has not demonstrated that the deposit reaches or is truncated by the fault. Along strike to the north and south, the mineralization is offset slightly by near vertical faulting; mineralization does not terminate at these faults, but the intensity of the trend is either diminished or high-grade mineralization has yet to be located.

Mineralization at the deposit is epithermal low-sulfidation (quartz-adularia) type. Although very little mineralization is hosted in or centered on the Rodeo Fault itself, it is possible that the fault played a role as a pathway at depth for the Rodeo deposit. Quartz veins 15 m or greater in width have been located throughout the property. The high-grade Au mineralization appears limited to a distinctive veining event. Evidence of ancillary veining events pre- and post-dating the high-grade event carry low-grade to anomalous level of Au mineralization.

The gold event is associated with a restricted vein stage characterized by small smoky quartz veinlets cut by banded blue opaline quartz and later brecciated and cemented by glassy smoky quartz hosting very fine disseminated pyrite. In the main zone, the veinlets generally trend NNW and dip steeply to the east or west, but the core angle in some drill holes suggests these veins may also have developed along ENE to EW structures. The envelope of the high-grade event appears to be restricted to a preferential volcanic layer or elevation (or both). Movement on the Rodeo Fault is likely responsible for the current orientation of the envelope.

Mining Methods

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Comminution

Crushers and Mills

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Processing

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Commodity Production

Commodity	Product	Units	2023	2022	2021	LOM (Projected)
Gold	Metal in doré	oz	....	....	....	33,879
Silver	Metal in doré	oz	....	....	....	89,769
Gold Equivalent	Metal in doré	oz	....	....	....

Operational metrics

Metrics	2023	2022	2021
Daily processing rate	....	....	....
Total tonnes mined	....	....	....
Tonnes processed	....	....	....
Hourly processing rate	....	....	....

Personnel

Job Title	Name	Profile	Ref. Date
.......................	.......................		Apr 9, 2024

Total Workforce	Year
......	2022
......	2021