Eclipse Group

The Eclipse Group is a copper mine located in Pima county, Arizona at an elevation of 5,000 feet.

About the MRDS Data:

All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.

Mine Info

Satelite View

MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.

Site Name

Primary: Eclipse Group
Secondary: Eclipse
Secondary: Backbone
Secondary: Triangle
Secondary: And Olcott Claims

Commodity

Primary: Copper
Secondary: Silver
Secondary: Lead
Tertiary: Gold
Tertiary: Molybdenum
Tertiary: Zinc

Location

State: Arizona
County: Pima
District: Helvetia-Rosemont District

Land Status

Land ownership: National Forest
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land, or if it is in an area that is generally private property. It does not definitively identify property status, nor does it indicate claim status or whether an area is open to prospecting. Always respect private property.

Holdings

Not available

Workings

Not available

Ownership

Not available

Production

Year: 1900
Time Period: 1880-1900
Material type: ORE CU
Description: Cp_Grade: ^10% Cu, Some High Grade Pb-Ag Ore

Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Discovery Method: Unknown
Years of Production:
Organization:
Significant: N
Deposit Size: S

Physiography

General Physiographic Area: Intermontane Plateaus
Physiographic Province: Basin And Range Province
Physiographic Section: Sonoran Desert

Mineral Deposit Model

Not available

Orebody

Form: IRREGULAR

Structure

Type: R
Description: Homoclinal ; Reg.Trends: Tilting And Broad Open Folds In S. And Extensive Faulting In N.

Type: L
Description: Thrust And Normal Faulting - Fracture Zones.

Alterations

Alteration Type: L
Alteration Text: Py-Cp Gossan; Skarn

Rocks

Name: Quartz Latite
Role: Associated
Age Type: Associated Rock
Age Young: Paleocene

Name: Quartz Latite
Role: Associated
Age Type: Host Rock
Age Young: Late Permian

Name: Quartz Latite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Paleocene

Analytical Data

Not available

Materials

Ore: Molybdenite
Ore: Galena
Ore: Sphalerite
Ore: Pyrite
Ore: Chalcopyrite

Comments

Comment (Deposit): THE STRATIGRAPHIC UNITS USED ARE THOSE OF H. DREWES - 1971 USGS MAP I-613. ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT

Comment (Location): S CENTRAL SECTION 24, N CENTRAL SECTION 25

Comment (Production): PRODUCTION WAS PRIOR TO 1900, YEARS ESTIMATED.

Comment (Development): ANACONDA REPORTS ROSEMONT-HELVETIA INTRUSIVE QUARTZ LATITE AS POTENTIAL PORPH. COPPER DEPOSIT IN 1971.

Comment (Deposit): CUPRIFEROUS QUARTZITE AND FERRUGINOUS CARBONATE, GOSSAN

Comment (Workings): SHAFT

Comment (Geology): 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.

References

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

Reference (Deposit): 1909 RECON F. C. SCHRADER U.S.G.S. BULL. 582

Reference (Deposit): 1971 DIREXPL ANACONDA -POSSIBLE NEW PORPH. COPPER DEPOSIT.

Reference (Deposit): 1971 GEOLMAP H. DREWES U.S.G.S. MAP I-613

Reference (Deposit): SCHRADER, F. C. 1915 USGS BULL. 582.

Reference (Deposit): ARIZONA BUREAU OF MINES 1971 FIELDNOTES V. 1 NO 2

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

Arizona Gold

"Where to Find Gold in Arizona" looks at the density of modern placer mining claims along with historical gold mining locations and mining district descriptions to determine areas of high gold discovery potential in Arizona. Read more: Where to Find Gold in Arizona.