Marshall Pass Nos. 33 Claim

Prospect in Saguache county in Colorado, United States with commodity Uranium

Sections on this page

Identification information
Geographic coordinates
Site location context
Geographic areas
Public Land Survey System information
Commodities
Materials information
Host and associated rocks
Nearby scientific data
Geologic structures
Economic information about the deposit and operations
Mining district
Land status
Ownership information
Links to other databases
Bibliographic references
General comments
Reporter information

Geologic information

Identification information

Deposit ID	10013131
MRDS ID	D009243
Record type	Site
Current site name	Marshall Pass Nos. 33 Claim
Alternate or previous names	Marshall Pass Nos. 34 Claim, Marshall Pass Nos. 35 Claim, Marshall Pass Nos. 36 Claim, Marshall Pass Nos. 58 Claim, Olympia Extension, Uncompahgre #1

Geographic coordinates

Geographic coordinates:	-106.27171, 38.3975 (WGS84)
Elevation	3231
Relative position	7.9 MILES S 85 E FROM SARGENTS

Site location context

Political divisions (FIPS codes)

Saguache(county)

Colorado(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Pahlone Peak(quadrangle 1:24,000 scale)

Saguache(quadrangle 1:100,000 scale)

Montrose(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Tomichi(hydrologic unit)

Gunnison(hydrologic accounting unit)

Gunnison(hydrologic subregion)

Upper Colorado(hydrologic region)

Federal lands

Grand Mesa, Uncompahgre and Gunnison National Forests(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country	State	County
United States	Colorado	Saguache

Public Land Survey System information

Meridian	Township	Range	Section	Fraction	State
New Mexico	048N	006E	23		Colorado

Comments on the location information

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

Commodities

Commodity	Importance
Uranium	Primary

Materials information

Materials	Type of material
Pitchblende	Ore
Uranophane	Ore

Host and associated rocks

Host or associated

Associated

Rock type

Plutonic Rock > Granitoid > Granite

Rock unit name

Pegmatitic Granite;Pegmatite

Rock description

Pegmatitic Granite;Pegmatite

Stratigraphic age (youngest)	Mesoproterozoic

Host or associated Host

Rock type Metamorphic Rock > Schist

Stratigraphic age (youngest) Paleoproterozoic
Host or associated Host

Rock type Plutonic Rock > Pegmatite

Stratigraphic age (youngest) Mesoproterozoic

Nearby scientific data

(1)	Pre-ash-flow andesitic lavas, breccias, tuffs, and conglomerates	ListMap

Economic information

Geologic structures

Type of structure	Local
Structure name	small faults associated with Chester Fault
Structure description	Chester Fault, Unnamed Normal Fault
Type of structure	Regional
Structure description	Sawatch Range, San Juan Volcanic Field

Economic information about the deposit and operations

Operation type	Surface
Development status	Prospect
Commodity type	Metallic
Deposit size	Small
Significant	No
Discovery year	1955

Mining district

District name	Marshall Pass District

Land status

Ownership category	National Forest

Ownership information

Type Owner

Owner Homestake Mining Co.

First year 1955

Type	Owner
Owner	Homestake Mining Co.
First year	1955

Comments on the workings information

PROSPECT PITS

Reference information

Links to other databases

Agency	Database name	Acronym	Record ID	Notes
USGS	Mineral Resources Data System	MRDS	D009243
U.S. Bureau of Mines	Minerals Availability System	MAS	0081090019

Bibliographic references

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.
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.
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.
Deposit

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

General comments

Subject category	Comment text
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
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

Subject category

Comment text

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

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

Reporter information

Type	Date	Name	Affiliation	Comment
Reporter	01-MAR-1982	Schwochow, Stephen D.	Colorado Geological Survey

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

Operator history (post-MRDS)

MRDS records operators as of each record's last update (≤ 2019). Some of the operators listed here have since changed hands or dissolved:

Homestake Mining Co. — acquired by Subsidiary of Barrick Gold (2001)
Operator of the historic Homestake Mine in South Dakota; acquired by Barrick Gold in 2001.

Curated by qvyshift.com from publicly-reported M&A activity (SEC filings, press releases, USGS Mineral Yearbooks). Not authoritative — verify against primary sources before relying on it. The MSHA panel above is the current authoritative source for actively-permitted mines.

Maps centered on this site

Authoritative Colorado resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.