The Sunset Group is a manganese mine located in Pima county, Arizona at an elevation of 2,051 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: 2,051 Feet (625 Meters)
Commodity: Manganese
Lat, Long: 32.42861, -111.63333
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.
Sunset Group MRDS details
Site Name
Primary: Sunset Group
Secondary: Sunset Claims
Commodity
Primary: Manganese
Secondary: Copper
Location
State: Arizona
County: Pima
District: Silver Bell District
Land Status
Land ownership: BLM Administrative Area
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: Surface/Underground
Ownership
Owner Name: David C. Hartley
Production
Year: 1955
Material type: MN
Description: Ap_Grade: ^28% Mn
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Year First Production: 1955
Discovery Year: 1954
Discovery Method: Unknown
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: LENS
Structure
Not available
Alterations
Alteration Type: L
Alteration Text: Propylitic
Rocks
Name: Diorite
Role: Associated
Age Type: Associated Rock
Age Young: Pliocene
Analytical Data
Not available
Materials
Ore: Pyrite
Ore: Chrysocolla
Comments
Comment (Workings): ORE MINED FROM ADIT AT 25-FOOT LEVEL AND 2 RAISES TO OPEN CUT ON SURFACE; 16-FOOT WINZE SHOWED DECREASING MINERALIZATION.
Comment (Reserve-Resource): A SMALL AMOUNT OF MANGANESE, ASSOCIATED WITH COPPER OXIDE STAINING WAS OBSERVED IN LIMESTONE BEDDING AT THE TOP OF THE SADDLE ABOUT 100 FEET NORTHWEST OF MAIN WORKINGS.
Comment (Production): ORE TRUCKED TO DEMING PURCHASE DEPOT; IDLE IN JUNE 1956
Comment (Deposit): ORE BODY PARALLELS BEDDING IN LIMESTONE AND TERMINATES ON NORTHWEST SIDE OF N40E TRENDING FAULT. OXIDIZED PYRITE AND MN OXIDES ARE THE MAIN SHOWING.
Comment (Deposit): THIS RECORD CONTAINS DATA FROM DUPLICATE RECORD M051114 OF ROGER DOCKTER WHICH HAS BEEN DELETED FROM MAIN MRDS. ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT
References
Reference (Deposit): FARNHAM, STEWART AND DELONG, 1961, USBM IC 7990.
Reference (Deposit): DOCKTER, ROGER, 1976, FIELD EXAM.
Reference (Deposit): 1956 RECON USBM I.C. 7990
Reference (Deposit): FARNHAM, STEWART, AND DE LONG, 1961, MANGANESE DEPOSITS OF EASTERN ARIZONA: USBM INF CIRC 7990
Reference (Production): USBM IC 7990
Reference (Deposit): KEITH, S B., 1974, INDEX OF MINING PROPERTIES IN PIMA COUNTY, ARIZONA: ARIZONA BUREAU OF MINES BULLETIN 189, P. 144.
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.
