Marshall Pass Nos. 33 Claim

The Marshall Pass Nos. 33 Claim is a uranium mine located in Saguache county, Colorado at an elevation of 10,600 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: Marshall Pass Nos. 33 Claim
Secondary: Marshall Pass Nos. 34 Claim
Secondary: Marshall Pass Nos. 35 Claim
Secondary: Marshall Pass Nos. 36 Claim
Secondary: Marshall Pass Nos. 58 Claim
Secondary: Olympia Extension
Secondary: Uncompahgre #1

Commodity

Primary: Uranium

Location

State: Colorado
County: Saguache
District: Marshall Pass 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

Not available

Ownership

Owner Name: Homestake Mining Co.
Years: 1955 -

Production

Not available

Deposit

Record Type: Site
Operation Category: Prospect
Operation Type: Surface
Discovery Year: 1955
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: Sawatch Range, San Juan Volcanic Field

Type: L
Structure: small faults associated with Chester Fault
Description: Chester Fault, Unnamed Normal Fault

Alterations

Not available

Rocks

Name: Schist
Role: Host
Age Type: Host Rock
Age Young: Paleoproterozoic

Name: Pegmatite
Role: Host
Age Type: Host Rock
Age Young: Mesoproterozoic

Name: Granite
Role: Associated
Age Type: Associated Rock
Age Young: Mesoproterozoic

Analytical Data

Not available

Materials

Ore: Pitchblende
Ore: Uranophane

Comments

Comment (Location): ON HILL BETWEEN MARSHALL CREEK AND HARRY CREEK 1.4 MILES NW OF MARSHALL PASS ; INFO FROM LAND.ST :1976

Comment (Workings): PROSPECT PITS

Comment (Deposit): REMAINDER OF MARSHALL PASS BLOCK OF CLAIMS LIE IN SE SEC. 11, ALL SEC. 14, E2 SEC. 15, E2 SEC. 22, W2 AND NE SEC. 23, NE SEC. 27, T48N, R 6 E ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT

Comment (Deposit): URANIUM MINERALIZATION FOUND IN PRECAMBRIAN SCHIST INTRUDED BY PEGMATITIC GRANITE AND PEGMATITES ALONG LOCAL BEDDING AND FOLIATION TREND OF APPROX. N 35 TO 40 E. PEGMATITE SWARM LIES IN AND NEXT TO BAND OF PEGMATITIC GRANITE THAT FORMS APPARENT SOUTHEAST LIMB OF SOUTHWEST-PLUNGING ANTICLINE TRUNCATED ON NORTHEAST BY UNNAMED NORMAL FAULT. IF THIS SITE IS SIMILAR TO MARSHALL PASS NO. 5 AND LOOKOUT NO. 22, POTENTIAL ORE COULD EXIST IN REGOLITH OR COLLUVIUM OVERLYING BEDROCK

References

Reference (Deposit): WRIGHT, R.J., AND EVERHART, D.L., 1960, URANIUM--MARSHALL PASS DISTRICT, IN DEL RIO, S.M., MINERAL RESOURCES OF COLORADO--FIRST SEQUEL: COLORADO STATE MINERAL RESOURCES BOARD, P. 357-359.

Reference (Deposit): OLSON, J.C., 1977, PRELIMINARY GEOLOGIC MAP OF PART OF THE PAHLONE PEAK QUADRANGLE, GUNNISON, SAGUACHE, AND CHAFFEE COUNTIES, COLORADO: USGS OPEN-FILE REPT. 77-325.

Reference (Deposit): GROSS, E.B., 1965, A UNIQUE OCCURRENCE OF URANIUM MINERALS, MARSHALL PASS, SAGUACHE COUNTY, COLORADO: AM. MINERALOGIST, V. 50, NOS. 7-8, P. 909-923.

Reference (Deposit): RANSPOT, H.W., 1958, GEOLOGY AND URANIUM DEPOSITS OF THE INDIAN CREEK AREA, GUNNISON AND SAGUACHE COUNTIES, COLORADO: UNIV. COLORADO M.S. THESIS

Reference (Deposit): NELSON-MOORE, J.L., COLLINS, D.B., AND HORNBAKER, A.L., 1978, RADIOACTIVE MINERAL OCCURRENCES OF COLORADO AND BIBLIOGRAPHY: CGS BULL. 40, P. 392

Colorado Mining Photos

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