The Black Hawk Group is a manganese mine located in Pima county, Arizona.
About the MRDS Data:
All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.
Mine Info
Satelite View
MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.
Black Hawk Group MRDS details
Site Name
Primary: Black Hawk Group
Secondary: Black Hawk No. 1, 2, and 3
Secondary: Black Eagle Nos. 1 and 2
Secondary: Blue Devil Nos.1 & 2
Commodity
Primary: Manganese
Location
State: Arizona
County: Pima
Land Status
Not available
Holdings
Not available
Workings
Not available
Ownership
Not available
Production
Year: 1955
Material type: MN
Description: Ap_Grade: ^20% Mn
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Year First Production: 1955
Discovery Year: 1940
Discovery Method: Unknown
Years of Production:
Organization:
Significant: N
Deposit Size: S
Physiography
Not available
Mineral Deposit Model
Not available
Orebody
Form: IRREGULAR VEINLETS IN FRACTURE ZONE
Structure
Type: L
Description: Northwest Trending Fracture Zone.
Alterations
Not available
Rocks
Name: Rhyolite
Role: Associated
Age Type: Associated Rock
Age Young: Pliocene
Analytical Data
Not available
Materials
Not available
Comments
Comment (Production): TRUCKED TO DEMING PURCHASING DEPOT EARLY IN 1955
Comment (Deposit): TWO PARALLEL FRACTURE ZONES 300 FT. APART, CONTAINING DISCONTINUOUS, NARROW STRINGERS OF HARD MANGANESE OXIDES IN MOST FRACTURE PLANES, WHICH SHOW GRADUAL REPLACEMENT OUTWARD FROM THE WALLS AND INCOMPLETE REPLACEMENT OF SOFTER WAD MANGANESE IN SHATTERED AREAS BETWEEN FRACTURES.
Comment (Deposit): FRACTURE ZONE PROBABLY EXTENDS TO EAST WHERE IT IS COVERED BY ALLUVIUM; SIMILIARITY OF MINERALS AND THE TREND OF FRACTURES SUGGEST THAT BLACK HAWK AND JEAN E ARE ON SAME FRACTURE ZONE. ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT
Comment (Commodity): PROBABLY ON SAME FRACTURE ZONE AS JEAN E GROUP.
Comment (Workings): AT LEAST 15 PITS AND CUTS; A FEW PITS WERE 10 TO 18 FT. DEEP.
References
Reference (Deposit): FARNHAM, STEWART AND DELONG, 1961, MANGANESE DEPOSITS OF EASTERN ARIZONA; USBM IC 7990
Reference (Deposit): 1956 RECON U.S.B.M. IC 7990
Reference (Other Database): CIMRI
Reference (Production): USBM IC 7990
Reference (Deposit): FARNHAM, STEWART AND DE LONG, 1961, MANGANESE DEPOSITS OF EASTERN ARIZONA: USBM IC 7990.
Reference (Deposit): NOWLAN, G.A., HAXEL, G.B., HANNA, W.F., PITKIN, J.A., DIVELEY-WHITE, D.V., MCDONNELL, J.R., JR., AND LUNDBY, WILLIAM, 1989, MINERAL RESOURCES OF THE BABOQUIVARI PEAK AND COYOTE MOUNTAINS WILDERNESS STUDY AREAS, PIMA COUNTY, ARIZONA: U.S. GEOLOGICAL SURVEY BULLETIN 1702, 30 P.
Reference (Deposit): 1955 DIREXPL DRAKE MINING CO; MINED ORE
Arizona Gold
"Where to Find Gold in Arizona" looks at the density of modern placer mining claims along with historical gold mining locations and mining district descriptions to determine areas of high gold discovery potential in Arizona. Read more: Where to Find Gold in Arizona.
