Eldon Mine, Eclipse Mine group, Helvetia, Helvetia-Rosemont Mining District, Pima County, Arizona, USAi
| Regional Level Types | |
|---|---|
| Eldon Mine | Mine |
| Eclipse Mine group | - not defined - |
| Helvetia | Town (Former) |
| Helvetia-Rosemont Mining District | Mining District |
| Pima County | County |
| Arizona | State |
| USA | Country |
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Latitude & Longitude (WGS84):
31° North , 110° West (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~1km
Type:
Köppen climate type:
Other/historical names associated with this locality:
Backbone Mine
‡Ref.: Schrader, F.C. & J.M. Hill (1915), Mineral deposits of the Santa Rita and Patagonia Mountains, Arizona, USGS Bull. 582: 92, 118.
Keith, Stanton B. (1974), Arizona Bureau of Geology & Mineral Technology, Geological Survey Branch Bull. 189, Index of Mining Properties in Pima County, Arizona: 125 (Table 4).
Arizona Bureau of Mines file data.
A Cu-Pb-Ag-Au mine located on the unpatented backbone claim, in South-central sec. 24 & North-central sec. 25, T.18S., R.15E. Owned by Steinfeld & Co.
Mineralization is irregular ferruginous gossan zone with copper and lead carbonates underlain locally by disseminated and massive chalcocite and argentiferous galena in pyrometasomatic replacement deposits along the faulted contact of Paleozoic quartzite and silicated limestone in thrust-faulted block segments.
The ore bed was 5 feet wide. Another, low-grade lode was about 100 feet wide.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Chalcocite Formula: Cu2S |
| ⓘ Galena Formula: PbS |
| ⓘ Galena var. Silver-bearing Galena Formula: PbS with Ag |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Chalcocite | 2.BA.05 | Cu2S |
| ⓘ | Galena | 2.CD.10 | PbS |
| ⓘ | var. Silver-bearing Galena | 2.CD.10 | PbS with Ag |
List of minerals for each chemical element
| S | Sulfur | |
|---|---|---|
| S | ⓘ Chalcocite | Cu2S |
| S | ⓘ Galena | PbS |
| S | ⓘ Galena var. Silver-bearing Galena | PbS with Ag |
| Cu | Copper | |
| Cu | ⓘ Chalcocite | Cu2S |
| Ag | Silver | |
| Ag | ⓘ Galena var. Silver-bearing Galena | PbS with Ag |
| Pb | Lead | |
| Pb | ⓘ Galena | PbS |
| Pb | ⓘ Galena var. Silver-bearing Galena | PbS with Ag |
Other Regions, Features and Areas containing this locality
Mexico
- Sierra Madre OccidentalMountain Range
North AmericaContinent
- Sonoran DesertDesert
North America PlateTectonic Plate
- Basin and Range BasinsBasin
- Mazatzal DomainDomain
- Southern Basin and RangeWide Rift
USA
- Arizona
- Santa Rita MountainsMountain Range
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