Engesser Mine (Engesser prospect; Johnnie prospect), Engesser Pass, Tank Mountains Mining District, Tank Mountains, Yuma County, Arizona, USAi
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Latitude & Longitude (WGS84):
33° 13' 51'' North , 113° 51' 27'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
Place | Population | Distance |
---|---|---|
Brenda | 676 (2011) | 50.5km |
La Paz Valley | 699 (2011) | 52.5km |
Dateland | 416 (2011) | 56.6km |
Quartzsite | 3,626 (2017) | 59.2km |
Mindat Locality ID:
33822
Long-form identifier:
mindat:1:2:33822:5
GUID (UUID V4):
74324567-b14d-49d5-82cf-21e80e9050a7
A Au prospect located in the NE¼ sec. 25, T2S, R16W (protracted), on land of unknown status.
Mineralization is varied: (1) Scattered, short, lenticular, and narrow, gold-bearing quartz, carbonate, iron oxide and minor, partly oxidized, copper and iron sulfide veins in fissure zones in Mesozoic granitic intrusive and metamorphic schist, with dioritic to rhyolitic dikes. Wall rocks are sericitized, silicified, and carbonatized. Gold concentrated by weathering in near-surface iron oxides and quartz.
Country rock is granite exhibiting coarse, pinkish phenocrysts of orthoclase and dark minerals, largely chlortized. It is cut by dikes of diorite porphyry & rhyolite porphyry & adjacent to veins, is rather intensely altered to sericite and carbonite. The vein strikes N20E & dips 45W.
Workings include an old, irregular shaft about 300 feet deep along the dip of the vein and a few short, irregular drifts.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
ⓘ Calcite Formula: CaCO3 |
ⓘ Chalcopyrite Formula: CuFeS2 |
ⓘ 'Chlorite Group' Description: Occurs in country rock granite. |
ⓘ Gold Formula: Au |
ⓘ Hematite Formula: Fe2O3 Description: Granular. |
ⓘ Jarosite Formula: KFe3+3(SO4)2(OH)6 Colour: Yellowish |
ⓘ 'Limonite' |
ⓘ Magnetite Formula: Fe2+Fe3+2O4 Description: Occurs as a vein mineral. |
ⓘ Magnetite var. Lodestone Formula: Fe2+Fe3+2O4 Description: Occurs as a vein mineral. |
ⓘ Muscovite Formula: KAl2(AlSi3O10)(OH)2 Description: Occurs as an alteration product in vein wall rocks. |
ⓘ Muscovite var. Sericite Formula: KAl2(AlSi3O10)(OH)2 Description: Occurs as an alteration product in vein wall rocks. |
ⓘ Orthoclase Formula: K(AlSi3O8) Colour: Pinkish Description: Occurs as coarse phenocrysts in granite country rock. |
ⓘ Pyrite Formula: FeS2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
Group 1 - Elements | |||
---|---|---|---|
ⓘ | Gold | 1.AA.05 | Au |
Group 2 - Sulphides and Sulfosalts | |||
ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
ⓘ | Pyrite | 2.EB.05a | FeS2 |
Group 4 - Oxides and Hydroxides | |||
ⓘ | Magnetite | 4.BB.05 | Fe2+Fe3+2O4 |
ⓘ | var. Lodestone | 4.BB.05 | Fe2+Fe3+2O4 |
ⓘ | Hematite | 4.CB.05 | Fe2O3 |
Group 5 - Nitrates and Carbonates | |||
ⓘ | Calcite | 5.AB.05 | CaCO3 |
Group 7 - Sulphates, Chromates, Molybdates and Tungstates | |||
ⓘ | Jarosite | 7.BC.10 | KFe3+3(SO4)2(OH)6 |
Group 9 - Silicates | |||
ⓘ | Muscovite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
ⓘ | var. Sericite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
ⓘ | Orthoclase | 9.FA.30 | K(AlSi3O8) |
Unclassified | |||
ⓘ | 'Chlorite Group' | - | |
ⓘ | 'Limonite' | - |
List of minerals for each chemical element
H | Hydrogen | |
---|---|---|
H | ⓘ Jarosite | KFe33+(SO4)2(OH)6 |
H | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
H | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
C | Carbon | |
C | ⓘ Calcite | CaCO3 |
O | Oxygen | |
O | ⓘ Calcite | CaCO3 |
O | ⓘ Hematite | Fe2O3 |
O | ⓘ Jarosite | KFe33+(SO4)2(OH)6 |
O | ⓘ Magnetite | Fe2+Fe23+O4 |
O | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
O | ⓘ Orthoclase | K(AlSi3O8) |
O | ⓘ Magnetite var. Lodestone | Fe2+Fe23+O4 |
O | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
Al | Aluminium | |
Al | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
Al | ⓘ Orthoclase | K(AlSi3O8) |
Al | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
Si | Silicon | |
Si | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
Si | ⓘ Orthoclase | K(AlSi3O8) |
Si | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
S | Sulfur | |
S | ⓘ Chalcopyrite | CuFeS2 |
S | ⓘ Jarosite | KFe33+(SO4)2(OH)6 |
S | ⓘ Pyrite | FeS2 |
K | Potassium | |
K | ⓘ Jarosite | KFe33+(SO4)2(OH)6 |
K | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
K | ⓘ Orthoclase | K(AlSi3O8) |
K | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
Ca | Calcium | |
Ca | ⓘ Calcite | CaCO3 |
Fe | Iron | |
Fe | ⓘ Chalcopyrite | CuFeS2 |
Fe | ⓘ Hematite | Fe2O3 |
Fe | ⓘ Jarosite | KFe33+(SO4)2(OH)6 |
Fe | ⓘ Magnetite | Fe2+Fe23+O4 |
Fe | ⓘ Pyrite | FeS2 |
Fe | ⓘ Magnetite var. Lodestone | Fe2+Fe23+O4 |
Cu | Copper | |
Cu | ⓘ Chalcopyrite | CuFeS2 |
Au | Gold | |
Au | ⓘ Gold | Au |
Other Databases
Link to USGS MRDS: | 10162352 |
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Other Regions, Features and Areas containing this locality
North America
- Sonoran DesertDesert
North America PlateTectonic Plate
- Basin and Range BasinsBasin
- Mojave DomainDomain
USA
- Arizona
- Kofa National Wildlife RefugeWildlife Refuge
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