Florence W. Mine

The Florence W. Mine is a gold and silver mine located in Montezuma county, Colorado at an elevation of 10,039 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

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.

Site Name

Primary: Florence W. Mine
Secondary: Patented Claims: Gold Dollar, MS 19232
Secondary: Last Chance, MS 193232
Secondary: Silver Mug, MS 19232
Secondary: Last Dollar, Ms

Commodity

Primary: Gold
Primary: Silver
Secondary: Copper
Secondary: Lead
Tertiary: Antimony

Location

State: Colorado
County: Montezuma
District: California (La Plata) 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.
Administrative Organization: San Juan N. F.

Holdings

Not available

Workings

Type: Underground

Ownership

Owner Name: First National Oil And Minerals Co.
Home Office: Pueblo, Co.
Years: 1958 -

Owner Name: Minerals Consolidate, Inc.
Home Office: Salt Lake City, Ut.
Years: 1958 -

Production

Not available

Deposit

Record Type: Site
Operation Category: Past Producer
Deposit Type: Vein
Operation Type: Unknown
Year First Production: 1914
Year Last Production: 1958
Discovery Year: 1914
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: Navajo Section

Mineral Deposit Model

Model Name: Polymetallic veins

Orebody

Not available

Structure

Type: R
Description: San Juan Uplift, Four Corners Platform

Type: L
Description: La Plata Dome

Alterations

Not available

Rocks

Name: Diorite
Role: Associated
Age Type: Associated Rock
Age Young: Paleocene

Name: Diorite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Paleocene

Name: Diorite
Role: Associated
Age Type: Host Rock
Age Young: Late Jurassic

Analytical Data

Analytical Data: SHIPPING ORE CONTAINED 0.8 TO 1.7 OZ/TON AU AND 1.0 TO 7.5 OZ/TON AG

Materials

Ore: Gold
Ore: Tetrahedrite
Ore: Chalcopyrite
Ore: Bornite
Gangue: Quartz
Gangue: Ankerite
Gangue: Barite

Comments

Comment (Deposit): COUNTRY ROCK CONSISTS OF WEST- TO WSW-DIPPING JURASSIC CLASTICS. VEIN STRIKES EAST-WEST, DIPS 53 TO 64 N, AND FOLLOWS NORMAL FAULT THAT COULD BE A WESTWARD SUBSIDIARY FRACTURE RELATED TO EAST-WEST-TRENDING PARROTT FAULT SYSTEM. VEIN ZONE CONTAINS 2.5 TO 5 FT OF BRECCIATED ROCK AND GOUGE WITH 6 INCHES TO 3 FT OF VEIN MATERIAL FORMED PARTLY BY BRECCIA REPLACEMENT AND PARTLY BY OPEN-SPACE FILLING; CONSISTS OF COARSE INTERGROWTH OF QUARTZ, BARITE, AND ANKERITE, WITH PYRITE AND CU SULFIDES.

Comment (Location): (LAND STATUS AND ADMINISTRATIVE AREA LOCATIONS CALCULATED USING GIS OVERLAY ANALYSIS FOR SAN JUAN N. F.). ON UNNAMED TRIBUTARY NORTH OF EAST MANCOS RIVER ABOUT 0.7 MILE ABOVE GOLD RUN CREEK CONFLUENCE, 3.7 MILES WSW OF LA PLATA TOWNSITE. ; INFO FROM LAND.ST :1974

Comment (Production): PROBABLE COMPLETE PRODUCTION RECORD. CLAIMS SURVEYED IN 1914 (FIRST YEAR OF PRODUCTION) AND NO PRODUCTION WAS REPORTED AFTER 1958.

Comment (Workings): LOWER ADIT DRIVEN N 18 W FOR 230 FT TO VEIN, THENCE WEST FOR 75 FT ALONG VEIN, WITH 100-FT RAISE AT 10 FT ALONG DRIFT. UPPER ADIT APPROX 100 FT ABOVE LOWER ADIT, DRIVEN N 10 W FOR 65 FT TO VEIN, THENCE WEST FOR 150 FT ON VEIN AND EAST FOR 60 VEIN ON VEIN; UNDERHAND STOPE ON EAST DRIFT.

References

Reference (Deposit): ECKEL, E.B., AND OTHERS, 1949, GEOLOGY AND ORE DEPOSITS OF THE LA PLATA DISTRICT, COLORADO: USGS PROF. PAPER 219, P. 69-70, 119-120.

Reference (Deposit): BLM MINERAL SURVEY MS 19232

Reference (Deposit): COLORADO DIV. MINES INF. REPT. AND ANNUAL OPERATOR REPTS.

Reference (Production): ECKEL AND OTHERS, 1949, P. 119 (AS COMPILED FROM USGS AND USBM RECORDS); COLO. DIV. MINES ANN. OPERATOR REPTS. (1957-1958)

Colorado Mining Photos

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