1. Mineral Resources
  2. Online Spatial Data
  3. Mineral Resource Data System (MRDS)

Alma Mater

Prospect in Dolores county in Colorado, United States with commodity Silver
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Materials information
  7. Nearby scientific data
  8. Ore body information
  9. Economic information about the deposit and operations
  10. Mining district
  11. Mineral rights holdings
  12. Land status
  13. Ownership information
  14. Links to other databases
  15. Bibliographic references
  16. Reporter information

Geologic information

Identification information

Deposit ID 10117668
MAS/MILS ID 0080330028
Record type Site
Current site name Alma Mater
Alternate or previous names San Juan National Forest

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: -108.03625, 37.68111 (WGS84)
Elevation 3018

Site location context

Political divisions (FIPS codes)

Dolores(county)

Colorado(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Rico(quadrangle 1:24,000 scale)

Dove Creek(quadrangle 1:100,000 scale)

Cortez(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Dolores(hydrologic unit)

Upper Colorado-Dolores(hydrologic accounting unit)

Upper Colorado-Dolores(hydrologic subregion)

Upper Colorado(hydrologic region)

Federal lands

San Juan National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States Colorado Dolores

Commodities

Commodity Importance
Silver Primary

Materials information

Materials Type of material
Calcite Unknown
Pyrite Unknown
Sphalerite Unknown

Nearby scientific data

Ore Body (1) -108.03625, 37.68111
ListMap

Economic information

Ore body information

  • Field Value
    Type of Orebody #1 REPLACEMENT
    Type of Orebody #2 SHEAR ZONE
    Type of Orebody #3 FISSURE VEIN
    Primary mode of Origin HYDROTHERMAL
    Date of Last Modification 911230

Economic information about the deposit and operations

Operation type Underground
Development status Prospect
Commodity type Metallic
Significant No

Mining district

District name Pioneer/Rico

Mineral rights holdings

Type of mineral rights Patented
Type of mineral rights Located Claim

Land status

Ownership category Mixed

Ownership information

  • Type Owner
    Owner Rico Development Corp.
    Interest 100
    Home office Colorado
    Year 1989

Comments on the workings information

  • WORKINGS CAVED IN 1989, ABOUT 280,000 CUBIC FEET OF DUMP MATERIAL, SAMPLE #324.

Reference information

Bibliographic references

  • Deposit

    REF: TWENTY SECOND ANNUAL REPORT U.S.G.S. 1901

  • Deposit

    US BUREAU OF MINES OPEN FILE REPORT MLA 2-92.

Reporter information

Type Date Name Affiliation Comment
Reporter 29-MAY-1992 Intermountain Field Operations Center (IFOC) U.S. Bureau of Mines

Beyond USGS

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

External references

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.