Lookout No. 22 Mine

Past Producer in Saguache county in Colorado, United States with commodities Uranium, Copper, Zinc, Lead

Sections on this page

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

Geologic information

Identification information

Deposit ID	10013115
MRDS ID	D009219
Record type	Site
Current site name	Lookout No. 22 Mine
Related records	10288803

Geographic coordinates

Point of reference	Pit
Geographic coordinates:	-106.28449, 38.39417 (WGS84)
Elevation	2975
Relative position	7 MILES S 84 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	22	S2 OF SE	Colorado

Comments on the location information

ON WEST SIDE OF HARRY CREEK 2 MILES WNW OF MARSHALL PASS ; INFO FROM LAND.ST :1976

Commodities

Commodity	Importance
Uranium	Primary
Copper	Tertiary
Zinc Critical	Tertiary
Lead	Tertiary

Comments on the commodity information

BASE-METAL ORE MINERALS CONSIDERED AS OCCURRENCES

Materials information

Materials	Type of material
Pitchblende	Ore
Uraninite	Ore
Uranophane	Ore
Boltwoodite	Gangue
Chalcocite	Gangue
Chalcopyrite	Gangue
Covellite	Gangue
Galena	Gangue
Limonite	Gangue
Marcasite	Gangue
Pyrite	Gangue
Sphalerite	Gangue

Alteration

(Local) sericite, bioitie oxidation

Analytical data

Result	ASSAYS OF DIFFERENT TYPES OF ORES, IN % V308: BLACK HIGH-GRADE PITCHBLENDE, 71.96
Result	YELLOW HIGH-GRADE OXIDIZED ORE, 34.54
Result	COARSE YELLOW ORE, 31.72
Result	ORE FINES AND SCRAP, 25.38
Result	ALLUVIUM, 2.31
Result	ALTERED SCHIST, 3.96. BULK ASSAY OF BAGGED ORE YIELDED 48.61% V308, 2.82% FEO-FE203, 1.68% AS203, 0.60% CUO, 0.33% P205, 0.17% SO4, 0.15% CAO, 0.10% MO02, 0.08% F, 0.06% V205, 0.04% CO2. FLUOROMETRIC ANALYSIS OF FIVE SOIL SAMPLES ABOVE AND BELOW SITE YIELDED 0.001 TO 0.02% U. SPECTROGRAPHIC ANALYSIS OF SAME SAMPLES GAVE 3% FE, 1.5% MG, 0.7% CA, 3% NA, 3% K, 0.3% TI, 0.07 TO 0.15% MN, TR TO 0.003% B, 0.07% BA, 0.0003% BE, TR CE, 0.0007 TO 0.0015% CO, 0.003 TO 0.007% CR, 0.0015 TO 0.007% CU, 0.0015 TO 0.003% GA 0.003% TO 0.007% LA, 0.0007 TO 0.0015% MO, 0.0015 TO 0.003% NB, TR ND, 0.0007 TO 0.0015% NI, 0.003 TO 0.015% PB, 0.0015% SC, 0.007 TO 0.015% SR, 0.003 TO 0.015% V, 0.007 TO 0.03% Y, 0.0007 TO 0.003% YB, 0.03% ZR

Host and associated rocks

Host or associated

Associated

Rock type

Plutonic Rock > Pegmatite

Rock unit name

Pegmatite

Rock description

Pegmatite

Stratigraphic age (youngest)	Mesoproterozoic
Stratigraphic age (youngest)	Mesoproterozoic

Host or associated Host

Rock type Metamorphic Rock > Schist

Rock unit name Mica Gneiss And Schist

Rock description Mica Gneiss And Schist

Host or associated	Host
Rock type	Metamorphic Rock > Schist
Rock unit name	Mica Gneiss And Schist
Rock description	Mica Gneiss And Schist

Nearby scientific data

Pit (1)	-106.28449, 38.39417	ListMap

Economic information

Geologic structures

Type of structure	Local
Structure name	Chester Fault
Structure description	Chester Fault
Type of structure	Regional
Structure description	Sawatch Range, San Juan Volcanic Field

Ore body information

Name 1

General form irregular

Depth to top 7.6M
Name 2

General form tabular, lenticular

Name	1
General form	irregular
Depth to top	7.6M

Name	2
General form	tabular, lenticular

Controls for ore emplacement

regolith developed over northeast-trending fault zone

Economic information about the deposit and operations

Operation type	Surface
Development status	Past Producer
Commodity type	Metallic
Deposit size	Small
Significant	No
Discovery year	1956
Discoverer	Al Newman, Monarch Exploration Co.
Year of first production	1956
Year of last production	1960

Mining district

District name	Marshall Pass District

Land status

Ownership category	National Forest

Ownership information

Type Operator

Owner Cotter Corp.

Home office Canon City, Co.

First year 1964
Type Owner

Owner Gibraltar Minerals

Home office Dallas, Tx.

First year 1964

Type	Operator
Owner	Cotter Corp.
Home office	Canon City, Co.
First year	1964

Type	Owner
Owner	Gibraltar Minerals
Home office	Dallas, Tx.
First year	1964

Production statistics

Year

1960

Period

1956-1960

Ore mined

462.57mt

Accuracy

Accurate

Description

Cp_Grade: ^1.17% U308 (Lookout No. 22)

Importance	Item	Commodity	Group	Amount recovered	Grade	Recovery percentage
Major	U3O8	Uranium	Uranium	6.05mt	1wt-pct

Year

1961

Period

1954-1961

Accuracy

Accurate

Description

Cp_Grade: ^0.25% U308 (Lookout Nos. 24, 33)

Importance	Item	Commodity	Group	Amount recovered	Grade	Recovery percentage
Major	U3O8 Ore	Uranium	Uranium		0wt-pct

Comments on the production information

GROSS (1965) REPORTS THAT 10,300 LB OF ORE MINED FROM COLLUVIUM IN 1956, FOLLOWED BY 500 LB ORE FROM SMALL MASS TO NW. THEN 42 TONS SCRAP MATERIAL AND ALLUVIUM WERE SHIPPED AT GRADE OF 4.39% V308. FINALLY 360 TONS BEDROCK ORE SHIPPED AT AVERAGE GRADE 0.55 TO 0.60% U308

Comments on the workings information

ORIGINAL LOOKOUT 22 DEVELOPED BY OPEN PIT IN ALLUVIUM AND UNDERLYING BEDROCK, ON NEARBY LOOKOUT NO. 33, FIVE TUNNELS DRIVEN FROM 20 TO 600 FT IN LENGTH WITH SEVERAL HUNDRED FEET OF DRIFTS AND CROSSCUTS

Comments on development

PRODUCTION ENDED BY 1960 OR 1961 BUT SOME CLAIMS WERE EXPLORED BY TUNNELS AND DIAMOND DRILLING AS LATE AS 1964

Reference information

Links to other databases

Agency	Database name	Acronym	Record ID	Notes
USGS	Mineral Resources Data System	MRDS	D009219
U.S. Bureau of Mines	Minerals Availability System	MAS	0081090016

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. 391
Production

NELSON-MOORE AND OTHERS, 1978

General comments

Subject category	Comment text
Deposit	MOST HIGH-GRADE ORE REPLACED QUARTZ-FELDSPAR-BIOTITE SCHIST IN NE-TRENDING FAULT ZONE NEXT TO PEGMATITE. EARLY ORE SOLUTIONS, AIDED BY HEMATITIC ALTERATION, PRECIPITATED VEIN QUARTZ AND COLLOFORM PITCHBLENDE. AFTER FRACTURING AND BRECCIATION, SOLUTIONS DEPOSITED PITCHBLENDE AS BANDED OVERGROWTHS. TETRAHEDRITE THAT FILLED FRACTURES AND MATRIX ALTERED TO CU SULFIDES. SUPERGENE ALTERATION OF VEIN PITCHBLENDE PRODUCED SUITE OF SECONDARY URANIUM MINERALS DOMINATED BY SCHOEPITE. MINERALIZATION DECREASES WITH DEPTH IN FAULT ZONE. HIGH-GRADE ORE FIRST CAME FROM 6-FT-THICK REGOLITH OR COLLUVIUM OVERLYING BEDROCK.
Deposit	REMAINDER OF LOOKOUT BLOCK OF CLAIMS (15 THRU 34) LIES IN SE SEC. 21, S2 SEC. 22, E2 AND NW SEC. 27, NE SEC. 28, T48N, R6E ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT

Subject category

Comment text

Deposit

MOST HIGH-GRADE ORE REPLACED QUARTZ-FELDSPAR-BIOTITE SCHIST IN NE-TRENDING FAULT ZONE NEXT TO PEGMATITE. EARLY ORE SOLUTIONS, AIDED BY HEMATITIC ALTERATION, PRECIPITATED VEIN QUARTZ AND COLLOFORM PITCHBLENDE. AFTER FRACTURING AND BRECCIATION, SOLUTIONS DEPOSITED PITCHBLENDE AS BANDED OVERGROWTHS. TETRAHEDRITE THAT FILLED FRACTURES AND MATRIX ALTERED TO CU SULFIDES. SUPERGENE ALTERATION OF VEIN PITCHBLENDE PRODUCED SUITE OF SECONDARY URANIUM MINERALS DOMINATED BY SCHOEPITE. MINERALIZATION DECREASES WITH DEPTH IN FAULT ZONE. HIGH-GRADE ORE FIRST CAME FROM 6-FT-THICK REGOLITH OR COLLUVIUM OVERLYING BEDROCK.

Deposit

REMAINDER OF LOOKOUT BLOCK OF CLAIMS (15 THRU 34) LIES IN SE SEC. 21, S2 SEC. 22, E2 AND NW SEC. 27, NE SEC. 28, T48N, R6E ; 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.

Maps centered on this site

Authoritative Colorado resources

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