The Mansfield Mine Group is a lead, copper, and silver mine located in Santa Cruz county, Arizona at an elevation of 4,800 feet.
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
Elevation: 4,800 Feet (1,463 Meters)
Commodity: Lead, Copper, Silver
Lat, Long: 31.61694, -110.79917
Map: View on Google Maps
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.
Mansfield Mine Group MRDS details
Site Name
Primary: Mansfield Mine Group
Secondary: Sweet
Secondary: Black Cap
Secondary: Ruby
Secondary: Rupert
Secondary: Lee
Secondary: Mansfield No. 1 and 2
Commodity
Primary: Lead
Primary: Copper
Primary: Silver
Secondary: Gold
Secondary: Zinc
Tertiary: Manganese
Location
State: Arizona
County: Santa Cruz
District: Mansfield District
Land Status
Land ownership: National Forest
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land, or if it is in an area that is generally private property. It does not definitively identify property status, nor does it indicate claim status or whether an area is open to prospecting. Always respect private property.
Holdings
Not available
Workings
Type: Underground
Ownership
Owner Name: Bradsher
Years: 1951 -
Production
Not available
Deposit
Record Type: Site
Operation Category: Producer
Operation Type: Unknown
Year First Production: 1881
Year Last Production: 1951
Discovery Year: 1879
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: S
Physiography
General Physiographic Area: Intermontane Plateaus
Physiographic Province: Basin And Range Province
Physiographic Section: Sonoran Desert
Mineral Deposit Model
Not available
Orebody
Form: TABULAR
Form: TABULAR
Structure
Type: R
Description: Quartz Monzonite Is Intruded And Overlain By Rhyolite
Type: L
Description: Dominant Structure In Monzonite Dips 35e; Rhyolite Traversed By A Coarse Sheeting Which Dips 60w
Alterations
Alteration Type: L
Alteration Text: Wall Rocks Are Strongly Altered; Rhyolite Altered To Quartz
Rocks
Name: Rhyolite
Role: Associated
Age Type: Associated Rock
Age Young: Early Cretaceous
Name: Rhyolite
Role: Associated
Age Type: Host Rock
Age Young: Late Cretaceous
Analytical Data
Analytical Data: ORE VALUES AVERAGED 19% PB, 22 OZ./TON AG, 2% CU, 0.1 OZ./TON AU
Materials
Ore: Chalcopyrite
Ore: Tetrahedrite
Ore: Bornite
Ore: Pyrite
Ore: Galena
Ore: Sphalerite
Gangue: Quartz
Gangue: Hornblende
Gangue: Biotite
Comments
Comment (Commodity): CHALCOPYRITE AND PYRITE OCCUR IN FINE-GRAINED, MASSIVE FORM
Comment (Location): IN LOWER MANSFIELD CANYON; AT INTERSECTION OF MANSFIELD CANYON AND TEMPORAL GULCH; UTM AND GEODETIC COORDINATES DESCRIBE CENTRAL POINT IN MINE GROUP ; INFO FROM LAND.ST :(1979)
Comment (Development): OWNERS AND OPERATORS INCLUDED GUNSIGHT MINING CO. (1883-1884), A.B. RICHMOND (1903-1906), F.P. O'NEILL, RUBY COPPER CO., MANSFIELD MINING AND SMELTING CO. (1906-1926), PIERCE (1926), LAYCOCK (1934), SOUTHERN ARIZONA MINING CO. (1926), CONSOLIDATED SOUTHERN ARIZONA MINING CO.; PROPERTY COMPRISED 40 CLAIMS, 25 OF WHICH WERE PATENTED, COVERING MORE THAN 3 MILES OF MANSFIELD CANYON AND TEMPORAL GULCH
Comment (Workings): DEVELOPMENTS INCLUDED 360 FT SHAFT WITH LEVELS AT 150, 250, AND 35O FT. ON SWEET CLAIM; 300 FT. OF DRIFTS FROM LEVELS OF SWEET SHAFT; 140-FT SHAFT AND 200-FT TUNNEL WITH LATERALS ON 3 LEVELS AND STOPES, TOTALLING ABOUT 2000 FT OF WORK ON BLACK CAP CLAIM; NUMEROUS SHAFTS, STOPES, AND TUNNELS ON OTHER CLAIMS
Comment (Geology): RHYOLITE IS TUFFACEOUS AND CONTAINS FRAGMENTS OF A COARSE ALTERED GRANITOID ROCK; GONE GOSLING CLAIM TO NW OF SWEET SHAFT CONTAINS SILICEOUS LEDGE CARRYING GALENA-SILVER ORE, WHICH DIPS STEEPLY TO SOUTH AND OUTCROPS 12 FT ABOVE SURFACE
Comment (Deposit): SWEET MINE DEPOSIT LIES ON SOUTH VEIN OF A LARGE LODE THAT STRIKES N70E AND DIPS 80S; BLACK CAP VEIN DIPS 70 SE AND AVERAGES 10 FT. WIDE; PRINCIPAL ORE VALUE OF BLACK CAP VEIN IS 3 FT. WIDE ORE SHOOT OR PAY STREAK
References
Reference (Deposit): ABGMT-USBM FILE DATA
Reference (Deposit): USBM FILES, MANSFIELD MINE GROUP
Reference (Deposit): ADMR FILE DATA, MANSFIELD MINE
Reference (Deposit): USGS BULL 582, P. 226-229
Reference (Deposit): ARIZ BUR MINES BULL 191, P. 90, 11) USGS MAP I-614
Reference (Deposit): ABGMT FILES, STANTON B. KEITH
Reference (Deposit): ABGMT CLIPPINGS FILE; MANSFIELD MINING AND SMELTING CO., RUPERT GROUP
Reference (Deposit): BLM DISTRICT MINING SHEET 687, 12) USGS PP 748, P. 14-15
Reference (Deposit): TENNEY, JAMES B., 1927-29, HISTORY OF MINING IN ARIZONA; ARIZONA BUREAU OF MINES, P. 317-318
Reference (Deposit): ROHRBACHER, ROBERT G. 1964, GEOLOGY OF THE TEMPORAL GULCH-MANSFIELD CANYON AREA SANTA CRUZ COUNTY ARIZONA; M.S. THESIS UNIVERSITY OF ARIZONA, P. 69
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.
