Chadwick Mine (Chadwick claims; East Evening Star Mine; West Evening Star Mine; Houston Mine), Cochise County, Arizona, USAi
| Regional Level Types | |
|---|---|
| Chadwick Mine (Chadwick claims; East Evening Star Mine; West Evening Star Mine; Houston Mine) | Mine |
| Cochise County | County |
| Arizona | State |
| USA | Country |
Chadwick Mine (Chadwick claims; East Evening Star Mine; West Evening Star Mine; Houston Mine), Whetstone Mining District, Arizona, USA
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Latitude & Longitude (WGS84):
31° 50' 8'' North , 110° 21' 38'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Whetstone | 2,617 (2011) | 13.6km |
| Whetstone | 2,617 (2017) | 15.1km |
| Pimaco Two | 682 (2011) | 15.4km |
| Saint David | 1,699 (2011) | 15.8km |
| Benson | 4,888 (2017) | 16.0km |
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 | 32km |
A former small surface and underground W mine located in the SE ¼ sec. 26, T18S, R19E, about ¾ mile SW of McGrew Spring or 6 miles W of San Juan, in the eastern foot of the Whetstone Mountains, along the north side of Middle Canyon. Started before 1909 (1905 ?). Owned at times, or in part, by the Euclid Mining Co. (prior to 1909); Conlig Tungsten Co., Standard Tungsten Corp.; The Dewey Chadwick & Associates (1939); and, the Minerals Development Co.
Mineralization is sparse wolframite and scheelite in irregular quartz veins in medium-grained, white, muscovite granite of Precambrian age that forms a ridge and is intruding Precambrian Pinal Schist. A vein of crystalline grayish-white quartz outcrops on the South slope of this ridge for a length of 600 feet (195 meters). It is 6 inches (15 cm) to 2 feet (0.6 meters) wide and strikes N.60ºE. & dips 80ºNW. Adjacent granite shows intense sericitic alteration and contains thin particles of wolframite to ¼ inch long. Sparse, thin veinlets and tiny particles of scheelite are locally present.
Workings include surface and underground comprised of several shallow pits and trenches and short adits.
Some tungsten concentrates were produced in 1943-1944.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Bornite Formula: Cu5FeS4 |
| ⓘ Chalcopyrite ? Formula: CuFeS2 |
| ⓘ Muscovite Formula: KAl2(AlSi3O10)(OH)2 Description: Occurs in altered wall rocks. |
| ⓘ Muscovite var. Sericite Formula: KAl2(AlSi3O10)(OH)2 Description: Occurs in altered wall rocks. |
| ⓘ Pyrite Formula: FeS2 |
| ⓘ Quartz Formula: SiO2 |
| ⓘ Scheelite Formula: Ca(WO4) Description: Fairly abundant disseminated particles. References: |
| ⓘ 'Wolframite Group' Description: Sparse crystals in quartz; generally less than ½ inch diameter. References: |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Bornite | 2.BA.15 | Cu5FeS4 |
| ⓘ | Chalcopyrite ? | 2.CB.10a | CuFeS2 |
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| ⓘ | 'Wolframite Group' | 4.DB.30 va | |
| Group 7 - Sulphates, Chromates, Molybdates and Tungstates | |||
| ⓘ | Scheelite | 7.GA.05 | Ca(WO4) |
| Group 9 - Silicates | |||
| ⓘ | Muscovite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
| ⓘ | var. Sericite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| H | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| O | Oxygen | |
| O | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| O | ⓘ Quartz | SiO2 |
| O | ⓘ Scheelite | Ca(WO4) |
| O | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| Al | Aluminium | |
| Al | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| Al | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| Si | Silicon | |
| Si | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| Si | ⓘ Quartz | SiO2 |
| Si | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| S | Sulfur | |
| S | ⓘ Bornite | Cu5FeS4 |
| S | ⓘ Chalcopyrite | CuFeS2 |
| S | ⓘ Pyrite | FeS2 |
| K | Potassium | |
| K | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| K | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| Ca | Calcium | |
| Ca | ⓘ Scheelite | Ca(WO4) |
| Fe | Iron | |
| Fe | ⓘ Bornite | Cu5FeS4 |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Fe | ⓘ Pyrite | FeS2 |
| Cu | Copper | |
| Cu | ⓘ Bornite | Cu5FeS4 |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
| W | Tungsten | |
| W | ⓘ Scheelite | Ca(WO4) |
Other Databases
| Link to USGS MRDS: | 10027122 |
|---|
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
- Whetstone Mining DistrictMining District
- Whetstone MountainsMountain Range
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