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Eclipse Group

Past Producer in Pima county in Arizona, United States with commodities Copper, Silver, Lead, Gold, Molybdenum, Zinc
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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. Production statistics
  18. Links to other databases
  19. Bibliographic references
  20. General comments
  21. Reporter information

Geologic information

Identification information

Deposit ID 10039407
MRDS ID M050040
Record type Site
Current site name Eclipse Group
Alternate or previous names Eclipse, Backbone, Triangle, And Olcott Claims
Related records 10162233

Geographic coordinates

Geographic coordinates: -110.76179, 31.85402 (WGS84)
Elevation 1524
Relative position 28 MILES SE OF TUCSON

Site location context

Political divisions (FIPS codes)

Pima(county)

Arizona(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Helvetia(quadrangle 1:24,000 scale)

Fort Huachuca(quadrangle 1:100,000 scale)

Nogales(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Rillito(hydrologic unit)

Santa Cruz(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 Pima

Public Land Survey System information

Meridian Township Range Section Fraction State
Gila and Salt River 18S 15E 24;25 Arizona

Comments on the location information

  • S CENTRAL SECTION 24, N CENTRAL SECTION 25

Commodities

Commodity Importance
Copper Primary
Silver Secondary
Lead Secondary
Gold Tertiary
Molybdenum Tertiary
Zinc Critical Tertiary

Materials information

Materials Type of material
Chalcopyrite Ore
Galena Ore
Molybdenite Ore
Pyrite Ore
Sphalerite Ore

Alteration

  • (Local) Py-Cp Gossan; Skarn

Host and associated rocks

  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Quartz Latite
    Rock unit name Quartzlatite 56 +-2my Quartz Latite
    Rock description Quartzlatite 56 +-2my Quartz Latite
    Stratigraphic age (youngest) Paleocene
    Stratigraphic age (youngest) Late Permian
    Stratigraphic age (youngest) Paleocene
  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Limestone
    Rock unit name Concha Limestone Cherty Limestone.;Scherrer Form. Quartzitic Sandstone
    Rock description Concha Limestone Cherty Limestone.;Scherrer Form. Quartzitic Sandstone

Nearby scientific data

(1) -110.76179, 31.85402
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Homoclinal ; Reg.Trends: Tilting And Broad Open Folds In S. And Extensive Faulting In N.
Type of structure Local
Structure description Thrust And Normal Faulting - Fracture Zones.

Ore body information

  • General form IRREGULAR
    Thickness 11.28M
    Depth to bottom 45.72M

Controls for ore emplacement

  • Impervious Quartzite Footwall Of Fault-Schrader-1915

Comments on the geologic information

  • GEOL.DESC: AGE OF MINERALIZATION BELIEVED TO BE THAT OF THE QUARTZ LATITE INTRUSIVE OF DREWES - 1971.REG.COM: STRUCTURE IN DISTRICT IS THRUST FAULTING - HIGH ANGLE NORMAL FAULTING AND FOLDING.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No

Mining district

District name Helvetia-Rosemont District

Land status

Ownership category National Forest

Production statistics

  • Year 1900
    Period 1880-1900
    Material ORE CU
    Accuracy Estimate
    Description Cp_Grade: ^10% Cu, Some High Grade Pb-Ag Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Copper Copper 10wt-pct

Comments on the production information

  • PRODUCTION WAS PRIOR TO 1900, YEARS ESTIMATED.

Comments on the workings information

  • SHAFT

Comments on development

  • ANACONDA REPORTS ROSEMONT-HELVETIA INTRUSIVE QUARTZ LATITE AS POTENTIAL PORPH. COPPER DEPOSIT IN 1971.

Reference information

Bibliographic references

  • Deposit

    SCHRADER, F. C. 1915 USGS BULL. 582.

  • Deposit

    ARIZONA BUREAU OF MINES 1971 FIELDNOTES V. 1 NO 2

  • Deposit

    DREWES, H. 1971 USGS MAP I-613 (SAHUARITA QUAD)

  • Deposit

    KEITH,S.B.,1974,INDEX OF MINING PROPERTIES IN PIMA COUNTY,ARIZONA:ARIZONA BUREAU OF MINES BULLETIN 189, P.125.

  • Deposit

    1909 RECON F. C. SCHRADER U.S.G.S. BULL. 582

  • Deposit

    1971 DIREXPL ANACONDA -POSSIBLE NEW PORPH. COPPER DEPOSIT.

  • Deposit

    1971 GEOLMAP H. DREWES U.S.G.S. MAP I-613

General comments

Subject category Comment text
Deposit CUPRIFEROUS QUARTZITE AND FERRUGINOUS CARBONATE, GOSSAN
Deposit THE STRATIGRAPHIC UNITS USED ARE THOSE OF H. DREWES - 1971 USGS MAP I-613. ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1972 Keith, William 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.