Endless Chain Mine (Cunningham tunnel), Harshaw Mining District, Patagonia Mountains, Santa Cruz County, Arizona, USAi
| Regional Level Types | |
|---|---|
| Endless Chain Mine (Cunningham tunnel) | Mine |
| Harshaw Mining District | Mining District |
| Patagonia Mountains | Mountain Range |
| Santa Cruz County | County |
| Arizona | State |
| USA | Country |
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Latitude & Longitude (WGS84):
31° 26' 4'' North , 110° 43' 34'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Kino Springs | 136 (2011) | 11.2km |
| Patagonia | 890 (2017) | 12.0km |
| Beyerville | 177 (2011) | 15.3km |
| Francisco Miguel Cárdenas Valdez (Mascareñas) | 541 (2014) | 18.9km |
| Nogales | 20,252 (2017) | 22.3km |
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
Local clubs are the best way to get access to collecting localities
| Club | Location | Distance |
|---|---|---|
| Huachuca Mineral and Gem Club | Sierra Vista, Arizona | 42km |
‡Ref.: Schrader, F.C. & J.M. Hill (1915), Mineral deposits of the Santa Rita and Patagonia Mountains, Arizona, USGS Bull. 582: 307-308.
Simons, F.S. (1974) Geologic map and sections of the Nogales and Lochiel quadrangles, Santa Cruz County, Arizona: U.S. Geological Survey Miscellaneous Investigations Series Map I-762, 9 p., 1 sheet, scale 1:48,000.
Keith, Stanton B. (1975), Arizona Bureau of Mines Bull. 191, Index of Mining Properties in Santa Cruz County Arizona: 79 (Table 4).
U.S. Bureau of Mines Coronado National Forest Study.
U.S. Bureau of Mines files, Endless Chain Mine.
MRDS database Dep. ID file #10048346, MRDS D #M899933; and, Dep. ID #10162245, MAS ID #0040230183.
A former small underground Cu-Ag-Mo-Pb mine located on a group of claims in the NE¼ sec. 17, T.23S., R.16E. (protracted), between Augusta and Morning Glory Mines on the SW side of Harshaw Creek (1/3 mile north of the Morning Glory Mine), in an open gulch, 2.5 miles SW of Harshaw, at an elevation of 5,400 feet, on National Forest land. Owned at times, or in part, by the Endless Chain Mining Co., of Oklahoma.
Mineralization is relatively narrow (0.76 meters wide), roughly banded, mineralized replacement of brecciated, pyritic quartzite by sulfides and sulfosalts in Cretaceous Bisbee sedimentary formations, that dips 70SE.
The orebed seems to be a 2½ foot thick in Paleozoic slaty, dense, light gray, brecciated, pyritic quartzite, dipping 70º SE.
Rhyolite in the area forms dikes and intrusive sheets in limestone. The sedimentary beds strike approximately N-S and dip 65-70W. The limestone in the vicinity is in part silicated, cherty, or flinty, with some interbedded strata of quartz.
Tectonic elements include the UX Ranch Fault Block.
Workings include an inclined shaft and drifts, and a tunnel a little farther downstream (Cunningham tunnel). About 100 tons of copper-silver ore were produced prior to 1900. Production records are not available.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Chalcocite Formula: Cu2S Description: A little occurs here. |
| ⓘ Chalcopyrite Formula: CuFeS2 |
| ⓘ Epidote Formula: (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| ⓘ Pyrite Formula: FeS2 |
| ⓘ 'Tetrahedrite Subgroup' Formula: Cu6(Cu4C2+2)Sb4S12S |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Chalcocite | 2.BA.05 | Cu2S |
| ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| ⓘ | 'Tetrahedrite Subgroup' | 2.GB.05 | Cu6(Cu4C2+2)Sb4S12S |
| Group 9 - Silicates | |||
| ⓘ | Epidote | 9.BG.05a | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| O | Oxygen | |
| O | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Al | Aluminium | |
| Al | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Si | Silicon | |
| Si | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| S | Sulfur | |
| S | ⓘ Chalcopyrite | CuFeS2 |
| S | ⓘ Chalcocite | Cu2S |
| S | ⓘ Pyrite | FeS2 |
| S | ⓘ Tetrahedrite Subgroup | Cu6(Cu4C22+)Sb4S12S |
| Ca | Calcium | |
| Ca | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Fe | Iron | |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Fe | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Fe | ⓘ Pyrite | FeS2 |
| Cu | Copper | |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
| Cu | ⓘ Chalcocite | Cu2S |
| Cu | ⓘ Tetrahedrite Subgroup | Cu6(Cu4C22+)Sb4S12S |
| Sb | Antimony | |
| Sb | ⓘ Tetrahedrite Subgroup | Cu6(Cu4C22+)Sb4S12S |
Other Databases
| Link to USGS MRDS: | 10048346 |
|---|
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
- Mojave DomainDomain
- Southern Basin and RangeWide Rift
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