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Unnamed Prospect 20-4

Occurrence in Pima county in Arizona, United States with commodity Copper
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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. Ore body information
  12. Economic information about the deposit and operations
  13. Mining district
  14. Links to other databases
  15. Bibliographic references
  16. General comments
  17. Reporter information

Geologic information

Identification information

Deposit ID 10039729
MRDS ID M050733
Record type Site
Current site name Unnamed Prospect 20-4

Geographic coordinates

Geographic coordinates: -111.05152, 32.20928 (WGS84)

Site location context

Political divisions (FIPS codes)

Pima(county)

Arizona(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Cat Mountain(quadrangle 1:24,000 scale)

Silver Bell Mountains(quadrangle 1:100,000 scale)

Tucson(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Santa Cruz(hydrologic unit)

Santa Cruz(hydrologic accounting unit)

Middle Gila(hydrologic subregion)

Lower Colorado(hydrologic region)

Geographic areas

Country State County
United States Arizona Pima

Public Land Survey System information

Meridian Township Range Section Fraction State
Gila and Salt River 14S 13E 18 Arizona

Commodities

Commodity Importance
Copper Tertiary

Alteration

  • (Local) Oxidized Pyrite, Limonite Stain.

Host and associated rocks

  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Rhyolite
    Stratigraphic age (youngest) Late Cretaceous

Economic information

Geologic structures

Type of structure Local
Structure description See General

Ore body information

  • Strike N48E
    Dip 66W

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No

Mining district

District name Amole District

Comments on the workings information

  • SHAFT

Reference information

Bibliographic references

  • Deposit

    ASHLEY, R. P., 1974 , FIELD EXAM

General comments

Subject category Comment text
Deposit STONY CRYSTALLIZED RHYOLITE TUFF, POSSIBLY SOMEWAHT SILICIFIED, HAS MINOR PARTLY OXIDIZED PYRITE AND MINOR TO MODERATELY ABUNDANT YELLOW BROWN LIMONITE STAIN. SOME CU-SILICATE ON FRACTURES. STRUCTURE NOTED IS ONE FRACTURE VISIBLE IN SHAFT: MAY OR MAY NOT BE PART OF MAIN FAULT ZONE HERE SEPARATING CAT MTN RHYOLITE AND SHORT'S RANCH ANDESITE (CAT MTN RHYOLITE ONLY ON DUMP). ; INFO.SRC : 3 FIELD OBSERV

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1974 Ashley, Roger P. U.S. Geological Survey
Updater 01-FEB-1980 Johnson, Kris H. (Creasey, S.C.) U.S. Geological Survey

Beyond USGS

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

Maps centered on this site

Authoritative Arizona resources

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