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  3. Mineral Resource Data System (MRDS)

Twilight and Grey Claims

Occurrence in Graham county in Arizona, United States with commodities Beryllium, Mica
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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. Host and associated rocks
  9. Nearby scientific data
  10. Economic information about the deposit and operations
  11. Mining district
  12. Links to other databases
  13. Bibliographic references
  14. General comments
  15. Reporter information

Geologic information

Identification information

Deposit ID 10094704
MRDS ID D011800
Record type Site
Current site name Twilight and Grey Claims
Related records 10234439

Geographic coordinates

Geographic coordinates: -109.96455, 32.65567 (WGS84)

Site location context

Political divisions (FIPS codes)

Graham(county)

Arizona(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Webb Peak(quadrangle 1:24,000 scale)

Safford(quadrangle 1:100,000 scale)

Silver City(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Willcox Playa(hydrologic unit)

San Pedro-Willcox(hydrologic accounting unit)

Middle Gila(hydrologic subregion)

Lower Colorado(hydrologic region)

Federal lands

Coronado 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 Arizona Graham

Public Land Survey System information

Meridian Township Range Section Fraction State
Gila and Salt River 009S 023E 10 Arizona

Commodities

Commodity Importance
Beryllium Critical Primary
Mica Tertiary

Comments on the commodity information

  • SAMPLE ASSAYED AT 0.27% BEO

Materials information

Materials Type of material
Beryl Ore
Mica Ore

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Pegmatite
    Stratigraphic age (youngest) Neoproterozoic
    Stratigraphic age (youngest) Neoproterozoic
  • Host or associated Host
    Rock type Metamorphic Rock > Schist
  • Host or associated Host
    Rock type Plutonic Rock > Granitoid > Granite

Nearby scientific data

(1) -109.96455, 32.65567
ListMap

Economic information

Economic information about the deposit and operations

Development status Occurrence
Commodity type Both
Deposit size Small
Significant No

Mining district

District name Pinaleno Mountains Area

Comments on the workings information

  • ADIT AND OPENCUTS

Reference information

Bibliographic references

  • Deposit

    MEEVES, H. C., 1966, U.S. BUREAU OF MINES REPORT OF INVESTIGATIONS RI-6828, P. 15 AND 57.

  • Deposit

    MOORE, R. T., 1969, MINERAL AND WATER RESOURCES OF ARIZONA: U.S. 90TH CONGRESS, 2ND SESSION, SENATE COMMITTEE ON INTERIOR AND INSULAR AFFAIRS, P. 15 AND 57.

  • Deposit

    PHILLIPS, K.A., 1987, ARIZONA INDUSTRIAL MINERALS: ARIZONA DEPARTMENT OF MINES AND MINERAL RESOURCES MINERAL REPORT 4, 185 P.

  • Other Database

    CIMRI

General comments

Subject category Comment text
Deposit MICA AND SCATTERED BERYL IN PEGMATITE IN PRECAMBRIAN SCHIST. TOTAL OF 22 CLAIMS.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-AUG-1984 Seanor, Clint E. (Worl, Ron) U.S. Geological Survey
Updater 01-DEC-1992 Orris, Greta J. 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.