Sugarloaf Prospect

Occurrence in La Paz county in Arizona, United States with commodities Aluminum, Lead, Molybdenum, Bismuth, Tungsten, Tin

Geologic information

Identification information

Deposit ID 10009277
MRDS ID D002156
Record type Site
Current site name Sugarloaf Prospect
Alternate or previous names Sugar Loaf, Sugarloaf Butte Alunite, Sugarloaf Peak
Related records 10137700

Geographic coordinates

Geographic coordinates: -114.31607, 33.63423 (WGS84)
Elevation 427
Relative position 5 MI WSW OF QUARTZITE.
(click for info)

Geographic areas

Country State County
United States Arizona La Paz

Public Land Survey System information

Meridian Township Range Section Fraction State
Gila and Salt River 003N 020W 03,04 NW/4 Arizona

Comments on the location information

  • INFO FROM LAND.ST :1964

Commodities

Commodity Importance
Aluminum Primary
Lead Secondary
Molybdenum Secondary
Bismuth Secondary
Tungsten Secondary
Tin Secondary

Comments on the commodity information

  • PB, MO, BI, W, & SN GEOCHEMICAL ANOMALIES.

Materials information

Materials Type of material
Alunite Ore
Natroalunite Ore
Hematite Gangue
Pyrite Gangue

Alteration

  • (Local) Quartz-Sericite-Pyrite Alteration. Silicification Of Schist

Analytical data

Result X-RAY & CHEM DATA INDICATE VEIN ALUNITE IS SODIC.

Host and associated rocks

  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Dacite
    Rock unit name Dome Rock Formation;
    Rock description Dome Rock Formation;

Nearby scientific data

(1) -114.31607, 33.63423

Ore body information

  • Thickness 60.96M
    Width 304.8M
    Length 1219.2M

Comments on the geologic information

  • QUARTZITE OVERLIES SERICITE SCHIST WHICH OVERLIES DACITE.

Economic information

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1929
Discoverer Arizona Bureau Of Mines
Discovery method Ore-Mineral In Place

Mining district

District name La Cholla District

Land status

Ownership category Federal

Ownership information

  • Type Owner-Operator
    Owner Ropp Brothers (?)

Reserves and resources

  • Type In-situ
    Estimate year 1941
    Total resources 116,000mt ore
    Commodity Subtype Grade units Group Importance Year
    Aluminum Alunite 55 wt-pct Aluminum Major 1941
  • Type In-situ
    Estimate year 1942
    Total resources 4,000mt ore
    Commodity Subtype Grade units Group Importance Year
    Aluminum Alunite 3.5 wt-pct Aluminum Major 1942

Comments on the reserve resource information

  • RESERVES IN VEINS ONLY; HOSTROCK ONLY SLIGHTLY ALUNIZED. NO RESOURCES OTHER THAN VEIN APPARENT. ONLY CONSIDERED TOTAL ROCK WITHIN 20 FT FROM SURFACE. PROBABLY ADDITIONAL ALUNITE AT GREATER DEPTHS BUT NO ESTIMATE MADE. ESTIMATE DOES NOT DISTINGUISH ALUNITE FROM NATROALUNITE BUT ANALYSIS INDICATES NATROALUNITE.

Comments on the workings information

  • PROSPECT PITS & 200 FT TUNNEL

Comments on development

  • SEVERAL ANOMALIES HAVE BEEN DRILLED IN RECENT PAST ; ECON.COM: KNOWN DEPOSIT IS TOO SMALL TO SERVE AS RAW MATERIAL FOR ALUMINUM INDUSTRY. VALUE OF DEPOSIT FOR OTHER USES IS DECREASED BY LOW GRADE AND HIGH NA CONTENT.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS D002156

Bibliographic references

  • Deposit

    HEINEMAN, 1935, SUGARLOAF BUTTE ALUNITE: E & MJ, V. 136, P. 138-139.

  • Deposit

    THOENEN, 1941, USBM RI 3561, P. 10-11.

  • Deposit

    JONES, 1915, USGS BULL 620-C, P. 45-57.

  • Deposit

    ROSS, 1922, USGS PP 129, P. 183-197.

  • Deposit

    CROWL, 1979, MS THESIS, UNIV OF AZ

  • Deposit

    HALL, ROBERT B., UNPUBLISHED DATA.

  • Deposit

    ARIZONA BUREAU OF MINES FILES, 1990.

  • Deposit

    KEITH, S.B., 1969, ALUNITE, IN ABM BULLETIN 180, USGS BULLETIN 871, P. 302-303.

  • Deposit

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

  • Deposit

    SAWYER, M.B., GURMENDI, A.C., DALEY, M.R., AND HOWELL, S.B., 1992, PRINCIPAL DEPOSITS OF STRATEGIC AND CRITICAL MINERALS IN ARIZONA: U.S. BUREAU OF MINES SPECIAL PUBLICATION, 334 P.

  • Other Database

    CIMRI

  • Reserve-Resource

    THOENEN, 1941, P .11; KEITH, 1969.

General comments

Subject category Comment text
Deposit BRANCHING IRREGULAR VEINS. ALUNITE VEINS A FEW INCHES TO 1 FT WIDE CUT DACITE AND ALTERED SCHIST. SOME ARE NEARLY PURE ALUNITE, BUT MANY ARE CONTAMINATED WITH QUARTZ AND A FEW CONTAIN GYPSUM. THE PURER ALUNITE IS WHITE, MASSIVE, FINE-GRAINED AND PORCELAINLIKE. DEPOSIT IS HIGH IN NA - NATROALUNITE. DEPOSIT DIMENSIONS ARE FOR MINERALIZED AREA.
Deposit THIS REPORT REPRESENTS A MERGER OF ORIGINAL RECORD D002156 WITH RECORD M030331 OF JAN WILT IN MOLYBDENUM FILE, CONTACT PERSON T.G. THEODORE, USGS. ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAY-1983 Peterson, Jocelyn A. U.S. Geological Survey
Updater 01-JUL-1990 Bolm, Karen S. U.S. Geological Survey
Updater 01-OCT-1992 Carbonaro, Marguerite M. U.S. Geological Survey