Eclipse Mine group, Helvetia, Helvetia-Rosemont Mining District, Pima County, Arizona, USAi
| Regional Level Types | |
|---|---|
| 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° 51' 15'' North , 110° 45' 41'' West
Latitude & Longitude (decimal):
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Corona de Tucson | 5,675 (2011) | 12.4km |
| East Sahuarita | 1,622 (2006) | 18.6km |
| Sahuarita | 25,707 (2017) | 21.6km |
| Sonoita | 818 (2015) | 21.8km |
| Green Valley | 21,391 (2011) | 21.9km |
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 | 44km |
| Tucson Gem and Mineral Society | Tucson, Arizona | 44km |
A former small underground Cu-Pb-Ag-Au-Mo-Zn mine group of three claims (1 patented, 2 unpatented) located in South-central sec. 24 & North-central sec. 25, T.18S., R.15E, 28 miles SE of Tucson. This group of claims lies on the rugged crest of the range at an elevation of about 5,000 feet, between the helvetia properties on the west and the Rosemont properties on the east. Owned by G.E. Dunbar of Kalamazoo, Michigan (circa 1915); and, 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 a faulted contact. The contact is upfaulted cupriferous Paleozoic quartzite on the west and the overlying silicated limestone on the east, in thrust-faulted block segments. This contact is known as the 'second contact.' The limestone along the contact is well-mineralized for a width of 20 feet or more and contains the metals indicated in the croppings by a ferruginous copper carbonate gossan or iron cap. The impervious quartzite footwall was seemingly an important physical factor in the concentration of the ore. Host rock units are the Concha Limestone (cherty limestone), the Scherrer Formation and quartzitic sandstone. An associated rock unit is quartz latite (56 ± 2MY). Alteration included gossan and skarn. The ore is 45.72 meters depth to bottom and 11.28 meters thick.
Local structures include thrust and normal faulting, fracture zones, homoclinal. Regional trends include tilting and broad open folds in the south and extensive faulting in the north.
Workings included a shaft. Production was prior to 1900, years estimated.
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Standard Detailed Gallery Strunz Chemical ElementsMineral List
Mineral list contains entries from the region specified including sub-localities16 valid minerals.
Rock Types Recorded
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Rock list contains entries from the region specified including sub-localities
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Alphabetical List Tree DiagramDetailed Mineral List:
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Chalcocite | 2.BA.05 | Cu2S |
| ⓘ | Sphalerite | 2.CB.05a | ZnS |
| ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
| ⓘ | Galena | 2.CD.10 | PbS |
| ⓘ | var. Silver-bearing Galena | 2.CD.10 | PbS with Ag |
| ⓘ | Molybdenite | 2.EA.30 | MoS2 |
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Hematite | 4.CB.05 | Fe2O3 |
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Calcite | 5.AB.05 | CaCO3 |
| ⓘ | Azurite | 5.BA.05 | Cu3(CO3)2(OH)2 |
| ⓘ | Malachite | 5.BA.10 | Cu2(CO3)(OH)2 |
| ⓘ | Rosasite | 5.BA.10 | (Cu,Zn)2(CO3)(OH)2 |
| Group 7 - Sulphates, Chromates, Molybdates and Tungstates | |||
| ⓘ | Jarosite | 7.BC.10 | KFe3+3(SO4)2(OH)6 |
| Group 8 - Phosphates, Arsenates and Vanadates | |||
| ⓘ | Libethenite | 8.BB.30 | Cu2(PO4)(OH) |
| Group 9 - Silicates | |||
| ⓘ | Kaolinite | 9.ED.05 | Al2(Si2O5)(OH)4 |
| ⓘ | Chrysocolla | 9.ED.20 | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| Unclassified | |||
| ⓘ | 'Limonite' | - | |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Azurite | Cu3(CO3)2(OH)2 |
| H | ⓘ Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| H | ⓘ Jarosite | KFe33+(SO4)2(OH)6 |
| H | ⓘ Kaolinite | Al2(Si2O5)(OH)4 |
| H | ⓘ Libethenite | Cu2(PO4)(OH) |
| H | ⓘ Malachite | Cu2(CO3)(OH)2 |
| H | ⓘ Rosasite | (Cu,Zn)2(CO3)(OH)2 |
| C | Carbon | |
| C | ⓘ Azurite | Cu3(CO3)2(OH)2 |
| C | ⓘ Calcite | CaCO3 |
| C | ⓘ Malachite | Cu2(CO3)(OH)2 |
| C | ⓘ Rosasite | (Cu,Zn)2(CO3)(OH)2 |
| O | Oxygen | |
| O | ⓘ Azurite | Cu3(CO3)2(OH)2 |
| O | ⓘ Calcite | CaCO3 |
| O | ⓘ Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| O | ⓘ Hematite | Fe2O3 |
| O | ⓘ Jarosite | KFe33+(SO4)2(OH)6 |
| O | ⓘ Kaolinite | Al2(Si2O5)(OH)4 |
| O | ⓘ Libethenite | Cu2(PO4)(OH) |
| O | ⓘ Malachite | Cu2(CO3)(OH)2 |
| O | ⓘ Quartz | SiO2 |
| O | ⓘ Rosasite | (Cu,Zn)2(CO3)(OH)2 |
| Al | Aluminium | |
| Al | ⓘ Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| Al | ⓘ Kaolinite | Al2(Si2O5)(OH)4 |
| Si | Silicon | |
| Si | ⓘ Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| Si | ⓘ Kaolinite | Al2(Si2O5)(OH)4 |
| Si | ⓘ Quartz | SiO2 |
| P | Phosphorus | |
| P | ⓘ Libethenite | Cu2(PO4)(OH) |
| S | Sulfur | |
| S | ⓘ Chalcopyrite | CuFeS2 |
| S | ⓘ Chalcocite | Cu2S |
| S | ⓘ Galena | PbS |
| S | ⓘ Jarosite | KFe33+(SO4)2(OH)6 |
| S | ⓘ Molybdenite | MoS2 |
| S | ⓘ Pyrite | FeS2 |
| S | ⓘ Sphalerite | ZnS |
| S | ⓘ Galena var. Silver-bearing Galena | PbS with Ag |
| K | Potassium | |
| K | ⓘ Jarosite | KFe33+(SO4)2(OH)6 |
| Ca | Calcium | |
| Ca | ⓘ Calcite | CaCO3 |
| Fe | Iron | |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Fe | ⓘ Hematite | Fe2O3 |
| Fe | ⓘ Jarosite | KFe33+(SO4)2(OH)6 |
| Fe | ⓘ Pyrite | FeS2 |
| Cu | Copper | |
| Cu | ⓘ Azurite | Cu3(CO3)2(OH)2 |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
| Cu | ⓘ Chalcocite | Cu2S |
| Cu | ⓘ Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| Cu | ⓘ Libethenite | Cu2(PO4)(OH) |
| Cu | ⓘ Malachite | Cu2(CO3)(OH)2 |
| Cu | ⓘ Rosasite | (Cu,Zn)2(CO3)(OH)2 |
| Zn | Zinc | |
| Zn | ⓘ Rosasite | (Cu,Zn)2(CO3)(OH)2 |
| Zn | ⓘ Sphalerite | ZnS |
| Mo | Molybdenum | |
| Mo | ⓘ Molybdenite | MoS2 |
| 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 Databases
| Link to USGS MRDS: | 10039407 |
|---|
Localities in this Region
- Arizona
- Pima County
- Helvetia-Rosemont Mining District
- Helvetia
- Eclipse Mine group
- Helvetia
- Helvetia-Rosemont Mining District
- Pima County
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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References
Eclipse Mine group, Helvetia, Helvetia-Rosemont Mining District, Pima County, Arizona, USA