Dome Mining District (Gila City Mining District), Yuma County, Arizona, USAi
| Regional Level Types | |
|---|---|
| Dome Mining District (Gila City Mining District) | Mining District |
| Yuma County | County |
| Arizona | State |
| USA | Country |
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Latitude & Longitude (WGS84):
32° North , 113° West (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~98km
Locality type:
KΓΆppen climate type:
A Au-Ag-marble-Cu mining area located in T8S, R21W, G&SRM, at the North end of the Gila Mountains.
Mineralization is varied: (1) Gold-bearing Quaternary gravels, up to 15 feet thick, in gulches, benches, and terraces over Tertiary sediments on a North-sloping pediment faulted against Mesozoic schist and gneiss of the mountain mass; (2) Zone of variable marble interbedded with schist and quartzite, about 150 feet wide, in metamorphosed Mesozoic sedimentary beds, crossing the North end of the Gila Mountains; and (3) Spotty and weak oxidized copper and gold ores in irregular, lensing quartz veins cutting metamorphosed Mesozoic sediments.
Workings are mostly dry placer operations worked mainly from 1858 to about 1865, and sporadically, on smaller scale, mainly from 1931-1943 and 1946-1950.
Estimated and recorded production would be close to 26,000 ounces Au and about 1,200 ounces Ag. Also shallow prospects.
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Standard Detailed Gallery Strunz Chemical ElementsMineral List
Mineral list contains entries from the region specified including sub-localities8 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:
| β Calcite Formula: CaCO3 Locality: Dome Station area, Dome Mining District (Gila City Mining District), Yuma County, Arizona, USA Description: Occurs as marble. Reference: Anthony, J. W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 153. |
| β Chrysocolla Formula: Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 Description: Occurs in irregular cavities and narrow fractures. Reference: MRDS database Dep. ID file #10027239, MRDS ID #M002579. |
| β 'Clinoptilolite' Formula: M3-6(Si30Al6)O72 · 20H2O Description: Occurs with bentonite & tuff in a late Tertiary lacustrine formation. Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 178; Bramlette, M.N. & E. Posnjak (1933), Zeolitic alteration of pyroclastics, Am.Min.: 18: 167-171; Sheppard, R.A. (1971), Clinoptilolite, of possible economic value in sedimentary deposits of the conterminous United States, USGS Bull. 1332-B: B1-B15. |
| β Gold Formula: Au Localities: Dome Mining District (Gila City Mining District), Yuma County, Arizona, USA Dome placers (Gila City placers; Gila City Mine), Dome Mining District (Gila City Mining District), Yuma County, Arizona, USA McPhaul & Palm holdings, Dome placers (Gila City placers; Gila City Mine), Dome Mining District (Gila City Mining District), Yuma County, Arizona, USA McPhaul prospect (McPhall prospect), Dome Mining District (Gila City Mining District), Yuma County, Arizona, USA Description: Placer gold. Reference: Keith, Stanton B. (1978) State of Arizona Bureau of Geology and Mineral Technology, Geol. Sur. Br. Bull. 192, Index of Mining Properties in Yuma Co., Arizona: 145 (Table 4). |
| β Hematite Formula: Fe2O3 Localities: Description: Occurs as cement in brecciated quartz veins. Reference: Wilson, E.D. (1933), AZ Bur. Mines Bull. 134: 200-201. |
| β 'Limonite' Localities: Description: Occurs as pseudomorphs after pyrite. Reference: Wilson, E.D. (1933), AZ Bur. Mines Bull. 134: 200-201. |
| β Malachite Formula: Cu2(CO3)(OH)2 Reference: MRDS database Dep. ID file #10027239, MRDS ID #M002579. |
| β Muscovite Formula: KAl2(AlSi3O10)(OH)2 Description: Coarse-grained & abundant. Reference: MRDS database Dep. ID file #10027239, MRDS ID #M002579. |
| β Muscovite var. Sericite Formula: KAl2(AlSi3O10)(OH)2 Description: Coarse-grained & abundant. Reference: MRDS database Dep. ID file #10027239, MRDS ID #M002579. |
| β Quartz Formula: SiO2 Reference: MRDS database Dep. ID file #10027239, MRDS ID #M002579. |
| β Wulfenite Formula: Pb(MoO4) Description: Occurs near the surface & particularly near vein walls. Abundant small crystals with copper minerals or within small cavities & fissures. Reference: MRDS database Dep. ID file #10027239, MRDS ID #M002579. |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| β | Gold | 1.AA.05 | Au |
| Group 4 - Oxides and Hydroxides | |||
| β | Hematite | 4.CB.05 | Fe2O3 |
| β | Quartz | 4.DA.05 | SiO2 |
| Group 5 - Nitrates and Carbonates | |||
| β | Calcite | 5.AB.05 | CaCO3 |
| β | Malachite | 5.BA.10 | Cu2(CO3)(OH)2 |
| Group 7 - Sulphates, Chromates, Molybdates and Tungstates | |||
| β | Wulfenite | 7.GA.05 | Pb(MoO4) |
| Group 9 - Silicates | |||
| β | Chrysocolla | 9.ED.20 | Cu2-xAlx(H2-xSi2O5)(OH)4 Β· nH2O, x < 1 |
| β | Muscovite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
| β | var. Sericite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
| Unclassified Minerals, Rocks, etc. | |||
| β | 'Clinoptilolite' | - | M3-6(Si30Al6)O72 Β· 20H2O |
| β | 'Limonite' | - | |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | β Clinoptilolite | M3-6(Si30Al6)O72 · 20H2O |
| H | β Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| H | β Malachite | Cu2(CO3)(OH)2 |
| H | β Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| H | β Muscovite | KAl2(AlSi3O10)(OH)2 |
| C | Carbon | |
| C | β Calcite | CaCO3 |
| C | β Malachite | Cu2(CO3)(OH)2 |
| O | Oxygen | |
| O | β Clinoptilolite | M3-6(Si30Al6)O72 · 20H2O |
| O | β Calcite | CaCO3 |
| O | β Hematite | Fe2O3 |
| O | β Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| O | β Malachite | Cu2(CO3)(OH)2 |
| O | β Wulfenite | Pb(MoO4) |
| O | β Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| O | β Quartz | SiO2 |
| O | β Muscovite | KAl2(AlSi3O10)(OH)2 |
| Al | Aluminium | |
| Al | β Clinoptilolite | M3-6(Si30Al6)O72 · 20H2O |
| Al | β Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| Al | β Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| Al | β Muscovite | KAl2(AlSi3O10)(OH)2 |
| Si | Silicon | |
| Si | β Clinoptilolite | M3-6(Si30Al6)O72 · 20H2O |
| Si | β Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| Si | β Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| Si | β Quartz | SiO2 |
| Si | β Muscovite | KAl2(AlSi3O10)(OH)2 |
| K | Potassium | |
| K | β Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| K | β Muscovite | KAl2(AlSi3O10)(OH)2 |
| Ca | Calcium | |
| Ca | β Calcite | CaCO3 |
| Fe | Iron | |
| Fe | β Hematite | Fe2O3 |
| Cu | Copper | |
| Cu | β Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| Cu | β Malachite | Cu2(CO3)(OH)2 |
| Mo | Molybdenum | |
| Mo | β Wulfenite | Pb(MoO4) |
| Au | Gold | |
| Au | β Gold | Au |
| Pb | Lead | |
| Pb | β Wulfenite | Pb(MoO4) |
References
Sort by
Year (asc) Year (desc) Author (A-Z) Author (Z-A)Wilson, E.D. (1933) Geology and Mineral Deposits of Southern Yuma County, Arizona. Arizona Bureau of Mines Bulletin 134: 181-189, 200-201, 202-207, 208-210.
Wilson, E.D. (1961) Gold Placers and Placering in Arizona. Arizona Bureau of Mines Bull. 168 (revised 1978): 18-21.
Johnson, M.G. (1972), Placer gold deposits of Arizona, USGS Bull. 1355, 103p.: 67-69.
Keith, Stanton B. (1978) State of Arizona Bureau of Geology and Mineral Technology, Geological Survey Branch Bull. 192, Index of Mining Properties in Yuma County, Arizona: 145 (Table 4).
Arizona Bureau of Mines file data.
Localities in this Region
- Arizona
- Yuma County
- Dome Mining District (Gila City Mining District)
- Yuma County
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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