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  3. Mineral Resource Data System (MRDS)

Unnamed Prospect 118-24

Occurrence in Pima county in Arizona, United States with commodities Copper, Iron
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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. Host and associated rocks
  10. Nearby scientific data
  11. Geologic structures
  12. Ore body information
  13. Controls for ore emplacement
  14. Economic information about the deposit and operations
  15. Mining district
  16. Land status
  17. Workings at the site
  18. Links to other databases
  19. Bibliographic references
  20. General comments
  21. Reporter information

Geologic information

Identification information

Deposit ID 10039824
MRDS ID M050904
Record type Site
Current site name Unnamed Prospect 118-24

Geographic coordinates

Geographic coordinates: -111.15513, 32.26983 (WGS84)

Site location context

Political divisions (FIPS codes)

Pima(county)

Arizona(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Avra(quadrangle 1:24,000 scale)

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

Tucson(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Brawley Wash(hydrologic unit)

Santa Cruz(hydrologic accounting unit)

Middle Gila(hydrologic subregion)

Lower Colorado(hydrologic region)

Federal lands

NPS(Federal land areas administered by NPS)

Geographic areas

Country State County
United States Arizona Pima

Public Land Survey System information

Meridian Township Range Section Fraction State
Gila and Salt River 13S 12E 30 Arizona

Commodities

Commodity Importance
Copper Tertiary
Iron Tertiary

Materials information

Materials Type of material
Magnetite Ore
Limonite Gangue

Alteration

  • (Local) Pyrite Gossan

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Quartz Monzonite
    Stratigraphic age (youngest) Late Cretaceous
    Stratigraphic age (youngest) Late Cretaceous
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Arkose

Economic information

Geologic structures

Type of structure Local
Structure description Shear Zone

Ore body information

  • General form TABULAR
    Strike N78E
    Dip 67S
    Width 1M

Controls for ore emplacement

  • Hanging Wall Of Shear Zone

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No

Mining district

District name Amole District

Land status

Ownership category National Park

Workings at the site

  • Type of workings Surface/Underground
    Overall length 13.72M

Comments on the workings information

  • ADIT, 2 PITS

Reference information

Bibliographic references

  • Deposit

    ASHLEY, R. P., 1974 , FIELD EXAM

General comments

Subject category Comment text
Deposit HEAVY LIMONITE IN 50CM WIDE ZONE ON HANGING WALL SIDE OF SHEAR ZONE. IMMEDIATELY TO NE, ABOUT 7M UPSLOPE, IS MASSIVE MAGNETITE -HEMATITE POD, PROSPECTED BY THE 2 PITS, 10-15M LONG. MINOR CU SILICATES ON FRACS. ABOUT 2M IN HANGING WALL OF SHEAR ZONE ARE APOPHYSCS INTO HORNFELS, WHICH LOOK LIKE K FELDSPAR WITH ABOUT 20% ACTINOLITE, AND INCLUDE A 60X15CM POD OF MASSIVE ACTINOLITE. ; 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.