Oregon Copper Mine, Helvetia-Rosemont Mining District, Pima County, Arizona, USAi
| Regional Level Types | |
|---|---|
| Oregon Copper Mine | Mine |
| Helvetia-Rosemont Mining District | Mining District |
| Pima County | County |
| Arizona | State |
| USA | Country |
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Latitude & Longitude (WGS84):
31° 49' 41'' North , 110° 46' 18'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Corona de Tucson | 5,675 (2011) | 15.2km |
| East Sahuarita | 1,622 (2006) | 19.5km |
| Sonoita | 818 (2015) | 19.8km |
| Green Valley | 21,391 (2011) | 21.2km |
| Sahuarita | 25,707 (2017) | 22.5km |
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 |
|---|---|---|
| Old Pueblo Lapidary Club | Tucson, Arizona | 46km |
| Tucson Gem and Mineral Society | Tucson, Arizona | 46km |
Mindat Locality ID:
36142
Long-form identifier:
mindat:1:2:36142:7
GUID (UUID V4):
55d60324-6351-474e-bfaf-418a476c783f
Other/historical names associated with this locality:
Coconino Mine; Chicago Mine
‡Ref.: Schrader, F.C. (1915) Mineral deposits of the Santa Rita and Patagonia Mountains, Arizona, with contributions by J.M. Hill: U.S. Geological Survey Bulletin 582, 373 p., 3 sheets, scale 1:125,000: 129, 130.
Drewes, H.D. (1971) Geologic map of the Sahuarita quadrangle, southeast of Tucson, Pima County, Arizona: U.S. Geological Survey Miscellaneous Geologic Investigations Map I-613, 1 sheet, scale 1:48,000.
Keith, Stanton B. (1974), Arizona Bureau of Geology & Mineral Technology, Geological Survey Branch Bull. 189, Index of Mining Properties in Pima County, Arizona: 127 (Table 4).
Niemuth, N.J. & K.A. Phillips (1992), Copper Oxide Resources, Arizona Department of Mines & Mineral Resources Open File Report 92-10: 13 (Table 1).
USGS Sahuarita Quadrangle topo map.
Arizona Bureau of Mines field notes (1971), vol. 1, no. 2.
MRDS database Dep. ID file #10039405, MRDS ID #M050036; and, Dep. ID #10162330, MAS ID #0040190346.
A former small surface and underground Cu-Ag-Pb-Zn-Au mine located in North-central sec. 36, T.18S., R.15E. (Sahuarita 15 minute topo map), 28 miles SE of Tucson. Owned at times, or in part, by the Rosemont Copper Co.; the Rosemont Development Co.; and, Chilson.
Mineralization is copper carbonates, oxides, silicates, and sulfides with minor lead and zinc minerals in fault, fracture, and bedding-controlled pyrometasomatic replacement orebodies in crushed and silicated Paleozoic limestone intruded by quartz latite porphyry in thrust-faulted Paleozoic formations. Ore control was permeable fracture zones. Alteration was intense silicification. The malachite and cuprite are probably secondary after chalcopyrite. The host rock unit is the Horquilla Limestone. An associated rock unit is quartz latite 56 ± 2 MY.
Local structures include thrust and normal faulting, fracture zones, homoclinal. Regonal trends include tilting and broad open folds in the south and extensive faulting in the north.
Workings include shafts, tunnels, and open cuts to 30.48 meters deep. Rich surface ores were mined in the 1890's. Sporadic production of some 3,000 tons of ore averaging about 10% Cu and 1 oz. Ag/T, together with the Chicago & Coconino Mines.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.Mineral List
3 valid minerals.
Detailed Mineral List:
| ⓘ Chrysocolla Formula: Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| ⓘ Cuprite Formula: Cu2O |
| ⓘ Malachite Formula: Cu2(CO3)(OH)2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| ⓘ | Cuprite | 4.AA.10 | Cu2O |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Malachite | 5.BA.10 | Cu2(CO3)(OH)2 |
| Group 9 - Silicates | |||
| ⓘ | Chrysocolla | 9.ED.20 | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| H | ⓘ Malachite | Cu2(CO3)(OH)2 |
| C | Carbon | |
| C | ⓘ Malachite | Cu2(CO3)(OH)2 |
| O | Oxygen | |
| O | ⓘ Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| O | ⓘ Cuprite | Cu2O |
| O | ⓘ Malachite | Cu2(CO3)(OH)2 |
| Al | Aluminium | |
| Al | ⓘ Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| Si | Silicon | |
| Si | ⓘ Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| Cu | Copper | |
| Cu | ⓘ Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| Cu | ⓘ Cuprite | Cu2O |
| Cu | ⓘ Malachite | Cu2(CO3)(OH)2 |
Other Databases
| Link to USGS MRDS: | 10039405 |
|---|
Other Regions, Features and Areas containing this locality
Mexico
- Sierra Madre OccidentalMountain Range
North America
- Sonoran DesertDesert
North America PlateTectonic Plate
- Basin and Range BasinsBasin
- Mazatzal DomainDomain
USA
- Arizona
- Santa Rita MountainsMountain Range
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