The Dewey Group is a gold and silver mine located in Grand county, Utah at an elevation of 11,401 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: 11,401 Feet (3,475 Meters)
Commodity: Gold, Silver
Lat, Long: 38.53417, -109.26250
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.
Dewey Group MRDS details
Site Name
Primary: Dewey Group
Commodity
Primary: Gold
Primary: Silver
Secondary: Copper
Tertiary: Fluorine-Fluorite
Location
State: Utah
County: Grand
District: La Sal Mtn.
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: Unknown
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Discovery Year: 1898
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: S
Physiography
General Physiographic Area: Intermontane Plateaus
Physiographic Province: Colorado Plateaus
Physiographic Section: Canyon Lands
Physiographic Detail: La Sal Mountains
Mineral Deposit Model
Not available
Orebody
Form: TABULAR
Structure
Not available
Alterations
Not available
Rocks
Name: Syenite
Role: Host
Age Type: Host Rock
Age Young: Pliocene
Name: Syenite
Role: Host
Age Type: Host Rock Unit
Age Young: Pliocene
Analytical Data
Not available
Materials
Ore: Chrysocolla
Ore: Malachite
Ore: Fluorite
Ore: Chalcopyrite
Gangue: Hedenbergite
Gangue: Quartz
Gangue: Hematite
Gangue: Pyrite
Gangue: Chalcedony
Gangue: Calcite
Comments
Comment (Location): SECTION SUBDIVISION: NE 1/4 NW 1/4 OF SEC. 25
Comment (Workings): THREE ADITS, THE MAIN ADIT IS PARTLY CAVED AND INACCESSIBLE. THE OTHER TWO ARE CAVED AT PORTAL
References
Reference (Reserve-Resource): MC CARTHY, B.M., 1977
Reference (Deposit): 1976 RECON UTAH GEOL. & MIN SURVEY - BULLETIN 11
Reference (Deposit): HUNT, C.B., 1958 , STRUCTURE AND IGNEOUS ROCKS OF THE LA SAL MTNS., UT.: USGS PROF PAPER 294-I
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