Little Annie Placers

The Little Annie Placers is a gold mine located in Rio Grande county, Colorado at an elevation of 11,355 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

Name: Little Annie Placers  

State:  Colorado

County:  Rio Grande

Elevation: 11,355 Feet (3,461 Meters)

Commodity: Gold

Lat, Long: 37.43139, -106.60222

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.


Satelite image of the Little Annie Placers

Little Annie Placers MRDS details

Site Name

Primary: Little Annie Placers
Secondary: Peterson and Brandt Placers
Secondary: Claims: Peterson Placer, MS 74
Secondary: Brandt Placer, MS 75


Commodity

Primary: Gold


Location

State: Colorado
County: Rio Grande
District: Summit (Summitville) District


Land Status

Land ownership: Private
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

Not available


Ownership

Not available


Production

Not available


Deposit

Record Type: Site
Operation Category: Past Producer
Deposit Type: Placer
Operation Type: Unknown
Year First Production: 1875
Discovery Year: 1870
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: S


Physiography

General Physiographic Area: Rocky Mountain System
Physiographic Province: Southern Rocky Mountains


Mineral Deposit Model

Not available


Orebody

Not available


Structure

Type: R
Description: San Juan Volcanic Field

Type: L
Description: Platoro Caldera, Summitville Caldera, Summitville Fault, South Mountain Dome


Alterations

Not available


Rocks

Name: Quartz Latite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Miocene

Name: Quartz Latite
Role: Associated
Age Type: Host Rock
Age Young: Holocene

Name: Quartz Latite
Role: Associated
Age Type: Associated Rock
Age Young: Miocene


Analytical Data

Not available


Materials

Ore: Gold


Comments

Comment (Location): ALONG WIGHTMAN FORK ON WEST SIDE OF SUMMITVILLE AT NORTH BASE OF SOUTH MTN. ELEV AND LAT-LONG GIVEN ARE FOR COMMON SECTION CORNER. ; INFO FROM LAND.ST :1975

Comment (Development): NAMES ABOVE WERE DISCOVERERS OF AU IN DISTRICT.

Comment (Deposit): AU IN ALLUVIUM AND COLLUVIUM ALONG WIGHTMAN FORK DERIVED FROM MINERALIZED QUARTZ LATITE IN SOUTH MTN DOME. NO PLACERS OR SIGNIFICANT VALLEY-FILL DEPOSITS IN NARROW CANYON BELOW CROPSY CREEK.


References

Reference (Deposit): PARKER, B.H., JR., 1974, GOLD PLACERS OF COLORADO: COLORADO SCHOOL OF MINES QUART., V. 69, NO. 4, P. 208-210.

Reference (Deposit): PATTON, H.B., 1917, GEOLOGY AND ORE DEPOSITS OF THE PLATORO-SUMMITVILLE MINING DISTRICT, COLORADO: CGS BULL. 13.

Reference (Deposit): STEVEN, T.A., AND RATTE, J.C., 1960, GEOLOGY AND ORE DEPOSITS OF THE SUMMITVILLE DISTRICT, SAN JUAN MOUNTAINS, COLORADO: USGS PROF. PAPER 343.

Reference (Deposit): LIPMAN, P.W., 1974, GEOLOGIC MAP OF THE PLATORO CALDERA AREA, SOUTHEASTERN SAN JUAN MOUNTAINS, SOUTHWESTERN COLORADO: USGS MAP I-828.

Reference (Deposit): BLM MINERAL SURVEYS MS 74, 75


Colorado Mining Photos

Placer mines at Cripple Creek, Colorado ca. 1892

Check out this collection of Colorado's best historic mining photos: Incredible Photos of Colorado Mining Scenes.