Summary

Mine Type	Stockpile
Status	Active
Commodities	Gold
Mining Method	Truck & Shovel / Loader
Production Start	...
Snapshot	The Bonanza Mine includes the Harquahala and Golden Eagle mines. The Bonanza Mine commenced production on June 3, 2021. Since 2022, the site has scaled up leach pad preparation and adjusted processing routines, but no major new production updates have been reported publicly since then. Despite being listed as “Abandoned” by the Mine Safety and Health Administration (MSHA), current regulatory references confirm the mine now operates under active status. Production figures for Bonanza Mine are not publicly available. The mine is operated by RMC Mining Development, LLC, a privately held company.

Deposit type

• Tailings
• Vein / narrow vein

Summary:

The mineralization in the Harquahala district is varied and complex.

Gold, silver, copper, lead, and zinc occur in pockety deposits, large and small, usually associated with iron oxides and gypsum where oxidized, and with auriferous pyrite in depth. Often the deposits occur in brecciated, lenticular quartz and jasper veins along shear zones and faults. The host rocks may be any of the Precambrian, Paleozoic, or Mesozoic rocks. Closely associated are diabase and aplite or quartz dikes and the source of the mineralization is believed to be the granitic intrusive. Spotty tungsten mineralization is associated with some discontinuous quartz veins and lenses in gneiss and limestone in scattered localities. Seams and irregular replacement bodies of mixed manganese and iron oxides occur locally in the metamorphosed sediments.

The most prominent ore deposits, at the Bonanaza (Harquahala) and Gold Eagle mines, occur in strongly deformed and faulted metamorphosed Paleozoic sediments intruded by an elongated body of quartz monzonite. The rich, high-grade, but pockety shoots of gold ore in the oxidized zone give way to auriferous pyrite with some base metal sulfides in fracture zones in depth. The weathering and erosion of these deposits created gold placers in the gulches of the Little Harquahala Mountains close to the deposits. Titaniferous magnetite sands have been explored on the western peneplain of the Little Harquahala Mountains (T.4 N., R. 14 W.) but have not been exploited (Harrer, 1964), and marble and quartzite have been quarried intermittently for many years from the Paleozoic metamorphosed beds in the Harquahala Mountains.

Mining Methods

- subscription is required.

Comminution

Crushers and Mills

Processing

- subscription is required.

Commodity Production

Commodity	Units	2021
Gold	oz	....