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Hansen Ore Body

Prospect in Fremont county in Colorado, United States with commodity Uranium
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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. Materials information
  8. Alteration
  9. Mineral occurrence model information
  10. Host and associated rocks
  11. Nearby scientific data
  12. Geologic structures
  13. Ore body information
  14. Controls for ore emplacement
  15. Economic information about the deposit and operations
  16. Mining district
  17. Land status
  18. Ownership information
  19. Reserves and resources
  20. Links to other databases
  21. Bibliographic references
  22. General comments
  23. Reporter information

Geologic information

Identification information

Deposit ID 10013176
MRDS ID D009322
Record type Site
Current site name Hansen Ore Body

Geographic coordinates

Geographic coordinates: -105.55336, 38.55001 (WGS84)
Elevation 2499
Relative position 10.4 7ILES N65W OF PARKDALE

Site location context

Political divisions (FIPS codes)

Fremont(county)

Colorado(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Hall Gulch(quadrangle 1:24,000 scale)

Pikes Peak(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)

Geographic areas

Country State County
United States Colorado Fremont

Public Land Survey System information

Meridian Township Range Section Fraction State
6th Principal 017S 073W 21;22;27;28 E2 (21); SW (22); NW (27); NE OF NE (28) Colorado

Comments on the location information

  • THE DEPOSIT LIES IN THE VALLEY OF MIDDLE TALLAHASSEE CREEK; THE LOCATION GIVEN HERE IS FOR THE CENTER OF THE DEPOSIT ; INFO FROM LAND.ST :(1982)

Commodities

Commodity Importance
Uranium Primary

Materials information

Materials Type of material
Coffinite Ore
Uraninite Ore
Hematite Gangue
Limonite Gangue

Alteration

  • (Local) Oxidation; Alteration Of Feldspar To Clay

Mineral occurrence model information

Model code 204
USGS model code 30c
Deposit model name Sandstone U

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 Uranium Source
    Rock description Wall Mountain Tuff Was Probable Principal Uranium Source
    Stratigraphic age (youngest) Early Permian
    Stratigraphic age (youngest) Early Permian
    Stratigraphic age (youngest) Oligocene
    Stratigraphic age (youngest) Oligocene
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Mudstone
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Sandstone
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Conglomerate
    Rock unit name Echo Park Alluvium, Fluvial Facies, Lower Part
    Rock description Echo Park Alluvium, Fluvial Facies, Lower Part

Nearby scientific data

(1) -105.55336, 38.55001
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Thirtynine Mile Volcanic Field, Currant Creek Basin
Type of structure Local
Structure description Echo Park Graben, Paleovalley; Deposit Is On Outside Of Paleovalley Meander. The Orebody Is Bounded By Two Burled, High Angle, Normal Faults; One On The Southeast And Another Which May Parallel The Western Edge Of The Orebody.

Ore body information

  • General form TABULAR, PODS
    Thickness 137.16M
    Depth to top 121.92M
    Depth to bottom 259.08M

Controls for ore emplacement

  • Deposition Controlled By Ground Water Flow Conditions And Carbonaceous Materials 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 Prospect
Commodity type Metallic
Deposit size Large
Significant No
Discovery year 1979

Mining district

District name Tallahassee Creek

Land status

Ownership category Private

Ownership information

  • Type Owner-Operator
    Owner Cyprus Mines Corp., Wyoming Minerals
    Home office Denver, Co.
    First year 1982

Reserves and resources

  • Type In-situ
    Name uranium ore
    Estimate year 1980
    Total resources 12000000kg commodity
    Commodity Subtype Grade units Group Importance Year
    Uranium U3O8 0.08 wt-pct Uranium Major 1980

Comments on the reserve resource information

  • Deposit was drilled by Cyprus Mines Corp. in late 1970s and early 1980s. Information from Dickinson (1981). The Hansen orebody is the largest know deposit in the district.

Comments on the workings information

  • DRILLING, PRELIMINARY SURFACE PREPARATIONS FOR AN OPEN-PIT MINE

Comments on development

  • DISCOVERED BY DRILLING BY RAMPART EXPLORATION CO. UNDER CONTRACT TO CYPRUS

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit THE DEPOSIT IS SIMILAR TO ROLL-FRONT DEPOSITS IN THE TERTIARY BASINS OF WYOMING BUT WITHOUT THE DISTINCT CRESCENT SHAPE OF THOSE DEPOSITS

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUL-1982 Collins, Donna B. Colorado Geological Survey
Updater 09-JUN-2004 Keller, John W. 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.