Mine detail: Black Rock Group

Previously called 'Black WarriorBlack Rock Nos. 13'

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Location

Lat / long:

33.7395, -113.17687

Resource(M)

Primary:	Manganese
Ore:	Manganite, Psilomelane, Pyrolusite
Gangue:	Calcite, Quartz
Orebody form:	WEDGE
Discovery year:	1916

Production

Operation type:	Unknown
Deposit type:	Replacement
Production size:	Small
Development status:	Past Producer

Geology

Host rock:	Basalt, Andesite, Tuffs, Flow Breccia
Host type:	Tuff
Associated type:	Gneiss
Structure:	Little Horn Peak Fault

References

MRDS	M001971
DEP	10027086
Reference	{Deposit:: FARNHAM, L.L, AND STEWART, L.A., 1958, MN DEPOSITS OF WESTERN ARIZONA, U.S.B.M. INFORMATION CIRCULAR 7843.}{Deposit:: ADMR BLACK ROCK FILE}{Deposit:: USBM-FILE DATA-CLUSTER NUMBER 604-BLACK ROCK MINE}{Deposit:: ALLEN, G.B., 1985, ECONOMIC GEOLOGY OF THE BIG HORN MOUNTAINS OF WEST-CENTRAL ARIZONA: ARIZONA BUREAU OF GEOLOGY AND MINERAL TECHNOLOGY OPEN-FILE REPORT 85-17, 140 P.}
Reporter	Harner, Joy L. (Peterson, Jo), Bolm, Karen S.