Gila Mountains Mica deposit, Fortuna Mine area, Barry M. Goldwater Air Force Range, Fortuna Mining District (La Fortuna Mining District), Yuma County, Arizona, USAi
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Latitude & Longitude (WGS84):
32° 33' 20'' North , 114° 18' 55'' West
Latitude & Longitude (decimal):
Type:
KΓΆppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Fortuna Foothills | 26,265 (2011) | 14.5km |
| Wellton | 2,936 (2017) | 20.5km |
| El Prado Estates | 504 (2017) | 25.6km |
| Buckshot | 153 (2017) | 25.9km |
| Rancho Mesa Verde | 625 (2017) | 32.1km |
Mindat Locality ID:
40705
Long-form identifier:
mindat:1:2:40705:7
GUID (UUID V4):
ab3de58a-4ac5-47cd-98f1-f7324f5e4cb7
A Mica-Kaolin-Gypsum locality in sec. 15, T10S, R20W, in the central portion of the Gila Mountains, 2ΒΌ miles E of the Fortuna Mine, on a military reservation. Claims held by Mr. S.E. Montgomery (1933). Phillips reported the location as sec. 23, T10S, R20W.
Mineralization is within pegmatite dikes that cut schist. Decomposed pegmatite dikes follow a fault zone for 1Β½ miles WSW-ward from the divide 2ΒΌ miles East of the Fortune Mine. Schist near this dike shows intense alteration to coarse-grained sericite and for a distance of up to 150 feet on each side, is marked by brown and yellow limonitic stain.
Thin books of muscovite plates up to 3 inches across. Mica in decomposed portion of vein easily concentrated by washing. The mica is ruled and plicated, probably could only be used for grinding. Flaky muscovite and coarse-grained sericite.
Workings include a few surface cuts and short tunnels in 1929.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| β 'Garnet Group' Formula: X3Z2(SiO4)3 |
| β Gypsum Formula: CaSO4 · 2H2O |
| β Kaolinite Formula: Al2(Si2O5)(OH)4 Description: In decomposed pegmatite dike. |
| β Muscovite Formula: KAl2(AlSi3O10)(OH)2 Description: In a decomposed pegmatite dike. |
| β Muscovite var. Sericite Formula: KAl2(AlSi3O10)(OH)2 Description: Coarse-grained, in altered schist nr pegmatite dike. |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 7 - Sulphates, Chromates, Molybdates and Tungstates | |||
|---|---|---|---|
| β | Gypsum | 7.CD.40 | CaSO4 Β· 2H2O |
| Group 9 - Silicates | |||
| β | Muscovite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
| β | var. Sericite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
| β | Kaolinite | 9.ED.05 | Al2(Si2O5)(OH)4 |
| Unclassified | |||
| β | 'Garnet Group' | - | X3Z2(SiO4)3 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | β Gypsum | CaSO4 · 2H2O |
| H | β Kaolinite | Al2(Si2O5)(OH)4 |
| H | β Muscovite | KAl2(AlSi3O10)(OH)2 |
| H | β Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| O | Oxygen | |
| O | β Gypsum | CaSO4 · 2H2O |
| O | β Kaolinite | Al2(Si2O5)(OH)4 |
| O | β Muscovite | KAl2(AlSi3O10)(OH)2 |
| O | β Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| O | β Garnet Group | X3Z2(SiO4)3 |
| Al | Aluminium | |
| Al | β Kaolinite | Al2(Si2O5)(OH)4 |
| Al | β Muscovite | KAl2(AlSi3O10)(OH)2 |
| Al | β Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| Si | Silicon | |
| Si | β Kaolinite | Al2(Si2O5)(OH)4 |
| Si | β Muscovite | KAl2(AlSi3O10)(OH)2 |
| Si | β Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| Si | β Garnet Group | X3Z2(SiO4)3 |
| S | Sulfur | |
| S | β Gypsum | CaSO4 · 2H2O |
| K | Potassium | |
| K | β Muscovite | KAl2(AlSi3O10)(OH)2 |
| K | β Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| Ca | Calcium | |
| Ca | β Gypsum | CaSO4 · 2H2O |
Other Databases
| Link to USGS MRDS: | 10060247 |
|---|
Other Regions, Features and Areas containing this locality
North America
- Sonoran DesertDesert
North America PlateTectonic Plate
- Basin and Range BasinsBasin
- Mojave DomainDomain
USA
- Arizona
- Yuma County
- Gila Mountains (Western)Mountain Range
- Yuma County
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References
