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Big Bear Claim

Occurrence in Fremont county in Colorado, United States with commodity Uranium
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Warning: This record lacks important information: bibliographic references, which we consider necessary for a comprehensive report.
Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Public Land Survey System information
  6. Commodities
  7. Alteration
  8. Host and associated rocks
  9. Nearby scientific data
  10. Geologic structures
  11. Ore body information
  12. Controls for ore emplacement
  13. Economic information about the deposit and operations
  14. Mining district
  15. Land status
  16. Links to other databases
  17. General comments
  18. Reporter information

Geologic information

Identification information

Deposit ID 10090918
MRDS ID D009355
Record type Site
Current site name Big Bear Claim
Alternate or previous names Big Hole Claim, Cactus Claims

Geographic coordinates

Geographic coordinates: -105.54502, 38.46862 (WGS84)
Elevation 2073
Relative position 4.5 MILES N27E FROM TEXAS CREEK

Site location context

Political divisions (FIPS codes)

Fremont(county)

Colorado(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Echo(quadrangle 1:24,000 scale)

Canon City(quadrangle 1:100,000 scale)

Pueblo(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Arkansas Headwaters(hydrologic unit)

Upper Arkansas(hydrologic accounting unit)

Upper Arkansas(hydrologic subregion)

Arkansas-White-Red(hydrologic region)

Federal lands

Bureau of Land Management(Bureau of Land Management CO)

Bureau of Land Management CO BLM(Type of land area)

BLM(Federal land areas administered by BLM)

Geographic areas

Country State County
United States Colorado Fremont

Public Land Survey System information

Meridian Township Range Section Fraction State
6th Principal 018S 073W 27,21,22,28 Colorado

Comments on the location information

  • ONE MILE NORTH ALONG ROAD FROM ECHO STATION OF THE D & RGW RQILROAD; IN DEVILS HOLE AREA ; INFO FROM LAND.ST :1976

Commodities

Commodity Importance
Uranium Primary

Alteration

  • (Local) Oxidation, Alteration Of Feldspar To Clay

Analytical data

Result RADIOACTIVITY RANGES FROM 20 TO 30 TIMES BACKGROUND

Host and associated rocks

  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Rhyolite
    Rock unit name Wall Mountain Tuff Was Probable Principal Source Of Uranium
    Rock description Wall Mountain Tuff Was Probable Principal Source Of Uranium
    Stratigraphic age (youngest) Eocene
    Stratigraphic age (youngest) Eocene
    Stratigraphic age (youngest) Oligocene
    Stratigraphic age (youngest) Oligocene
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Sandstone
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Arkose
    Rock unit name Echo Park Alluvium
    Rock description Echo Park Alluvium

Nearby scientific data

(1) -105.54502, 38.46862
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Thirtynine Mile Volcanic Field
Type of structure Local
Structure description Echo Park Graben, Paleovalleys, Faults

Ore body information

  • General form TABULAR
  • General form TABULAR

Controls for ore emplacement

  • Deposition Controlled By Ground Water Flow Conditions And Carbonaceous Material With Associated Pyrite. Flow Was Impeded By The Fault On The Southern End Of The Echo Park Graben.

Comments on the geologic information

  • DEPOSITS LOCALIZED AND PRESERVED BY SLUGGISH GROUNDWATER MOVEMENT IN AREA. THOSE CONDITIONS STILL PRESENT AS EVIDENCED BY ARTESIAN PRESSURE IN WELLS AND SPRINGS ISSUING FROM ECHO PARK FORMATION AND BY A PRESENT URANIUM CONTENT OF GROUNDWATER IN AREA AS HIGH AS 900 PPB.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1952

Mining district

District name Echo Park Area; Devils Hole Area

Land status

Ownership category BLM Administrative Area

Comments on the workings information

  • DISCOVERY PITS,

Comments on development

  • EXPLORATORY DRILLING IN 1954

Reference information

General comments

Subject category Comment text
Deposit Discovery Year: EARLY 1950'S

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1982 Collins, Donna B. 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

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