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  3. Mineral Resource Data System (MRDS)

Anna Claim

Occurrence in Saguache county in Colorado, United States with commodities Uranium, Manganese
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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. Controls for ore emplacement
  12. Economic information about the deposit and operations
  13. Mining district
  14. Land status
  15. Ownership information
  16. Links to other databases
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10013026
MRDS ID D009088
Record type Site
Current site name Anna Claim

Geographic coordinates

Geographic coordinates: -106.63422, 38.30667 (WGS84)
Elevation 2987
Location accuracy 250(meters)
Relative position 22.5 MILES S44E FROM GUNNISON, Within 0.125-Mile Radius

Site location context

Political divisions (FIPS codes)

Saguache(county)

Colorado(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Razor Creek Dome(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 047N 003E 27 NW Colorado

Comments on the location information

  • ON RIDGE WEST OF WEST GISMO CREEK ; INFO FROM LAND.ST :1976

Commodities

Commodity Importance
Uranium Primary
Manganese Critical Tertiary

Alteration

  • (Local) Abundant Hematite And Limonite, Minor Manganese Staining

Analytical data

Result BACKGROUND RADIATION 0.015 MR/HR, RANGE 0.07 TO 0.4 MR/HR

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Quartz Monzonite
    Stratigraphic age (youngest) Neoproterozoic
    Stratigraphic age (youngest) Neoproterozoic
    Stratigraphic age (youngest) Oligocene
  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Rhyodacite
  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Quartz Latite
  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Latite
    Rock unit name Early Intermediate-Composition Flows And Breccias;Quartz Monzonite Of Cochetopa Cr
    Rock description Early Intermediate-Composition Flows And Breccias;Quartz Monzonite Of Cochetopa Cr
  • Host or associated Host
    Rock type Plutonic Rock > Granitoid > Quartz Monzonite
    Rock unit name Quartz Monzonite Of Cochetopa Creek
    Rock description Quartz Monzonite Of Cochetopa Creek

Economic information

Geologic structures

Type of structure Regional
Structure description San Juan Volcanic Field; Gunnison Uplift
Type of structure Local
Structure description Cochetopa Dome; Los Ochos Fault; Razor Creek Dome

Controls for ore emplacement

  • Silicification, Fracturing, Brecciation Of Sedimentary Rocks Along Los Ochos And Related Faults

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No

Mining district

District name Cochetopa (Cochetopa Creek) District

Land status

Ownership category National Forest

Ownership information

  • Type Owner
    Owner Lewis N. Gould, And Others
    Home office Gunnison, Co.
    First year 1955

Comments on the workings information

  • 10-FT SHAFT; TWO DOZED TRENCHES 60 TO 75 FT LONG AND 2 TO 6 FT DEEP

Comments on development

  • DISTRICT MINED PREVIOUSLY FOR AU AND BASE METALS. GUNNISON MINING CO. DISCOVERED URANIUM IN 1954 ALONG LOS OCHOS FAULT.

Reference information

General comments

Subject category Comment text
Deposit HEAVILY ALTERED SHEAR ZONE TRENDS N 35 E, 65 SE. PROBABLE BRANCH OF MAIN ZONE TRENDS N65E, TO SE.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-82 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

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