King of Arizona Mine, Kofa Mining District, Yuma County, Arizona, USAi
Regional Level Types | |
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King of Arizona Mine | Mine |
Kofa Mining District | Mining District |
Yuma County | County |
Arizona | State |
USA | Country |
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Latitude & Longitude (WGS84):
33° 16' 9'' North , 113° 57' 57'' West
Latitude & Longitude (decimal):
Type:
KΓΆppen climate type:
Nearest Settlements:
Place | Population | Distance |
---|---|---|
La Paz Valley | 699 (2011) | 42.7km |
Brenda | 676 (2011) | 45.7km |
Quartzsite | 3,626 (2017) | 50.2km |
Vicksburg | 597 (2011) | 56.4km |
Dateland | 416 (2011) | 65.8km |
Mindat Locality ID:
13854
Long-form identifier:
mindat:1:2:13854:6
GUID (UUID V4):
56b8ced8-28eb-4900-a9d2-27b01e8ee767
Other/historical names associated with this locality:
King of Arizona property; King of Arizona group of claims; King of Arizona vein; Kofa Mine; Gleason Mine; Homestake claim
A former underground Au-Ag(58:1)-Mn mine located on 4 full claims (Homestake; King of Arizona; Last Hope; Mucho Bueno) in the center of sec. 12, T2S, R17W, south end of the Kofa Mountains, on federal land. This mine is partially on the Homestake claim, which covers the chief workings of the mining operation. Outcrops at an elevation of about 1,700 feet above sea level. Discovered by Charles E. Eichelberger. Owned at times, or in part, by the King of Arizona Mining & Milling Co.; Rob Roy Development Co.; and the Kofa Mining Syndicate. Operated by Barons Gold, Inc., Lethbridge, Alberta, Canada (1986). Started winter 1896 and closed Jan 1899. Reopened August 1899 and ceased operations about July, 1910. Last produced 1939.
Mineralization is fine-grained free gold with silver in a layered quartz gangue in an irregular fissure vein (King of Arizona vein) in a large shear zone cutting Cretaceous or Tertiary rhyolite volcanics and silicified, brecciated andesite. The lode is 670.56 meters long, 3.66 meters wide, with a depth to top of 0 meters, is 228.6 meters thick, and trends between N.60ΒΊW. & West and dips at an angle of 60ΒΊS. The orebody is said to average 12 feet wide. Lode matter is a brecciated, generally brown to maroon andesite porphyry. The andesite is partly silicified, particularly where fissuring is closely spaced. There are many quartz and manganocalcite stringers that traverse the lode in all directions, from knife-blade thick to several feet wide. Vein width increases with depth but with decreasing values.
A strong vein of gold-bearing quartz. The vein width increases with depth but with decreasing values. The footwall of the vein is generally a well-defined slicken-sided plane, but the hanging wall is indefinate. The ore body contained many small fissures and small slip planes, and most of them are parallel to the trend of the ore body, but several lie at angles with the vein, generally coming in from the hanging wall side, and make horses of barren material. About 200 feet east of the shaft strong cross-fissures filled with calcite apparently limit the ore. There are 3 well-marked divisions or layers within the vein. On the hanging wall there is a soft layer from 3 to 3Β½ inches (7.5 to 9 cm) wide averaging $800 Au/T (period values). Next, below this is a middle layer or body of quartz about 20 inches (50 cm) thick averaging about $190-200 Au/T (period values). The remainder of the vein averages $24 Au/T (period values). The vein is crosscut West of the shaft & proved to be 18 inches wide (45 cm) The lode trends between N.60ΒΊW. & West and dips about 60ΒΊS.
Workings are extensive underground with stopes from surface to the 750 foot level serviced by a 750 foot (228 meters) deep inclined shaft. Drifts on the 100 foot level and an adit at the collar level. Drifts West of the shaft are over 2,000 feet long; while on the East they are not longer than 200 feet. This mine was worked from the late 1880's to 1910, and sporadically through 1937. It produced some 739,300 tons of ore averaging about 0.23 oz. Au/T and 0.1 oz. Ag/T, valued at 3,500,000 in Au (period values). Barons constructed an agitation leach facility and began production in late 1986 from tailings.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsMineral List
Mineral list contains entries from the region specified including sub-localities15 valid minerals.
Detailed Mineral List:
β Aurorite Formula: Mn2+Mn4+3O7 · 3H2O |
β Bixbyite-(Mn) Formula: Mn3+2O3 |
β Calcite Formula: CaCO3 |
β Calcite var. Manganese-bearing Calcite Formula: (Ca,Mn)CO3 Colour: Black to brown Description: Highly manganoan. References: |
β Chalcophanite Formula: ZnMn4+3O7 · 3H2O |
β Fluorite Formula: CaF2 References: |
β Gold Formula: Au Localities: Description: As fine-grained free gold. with silver. References: |
β Groutite Formula: Mn3+O(OH) Localities: |
β Manganite Formula: Mn3+O(OH) |
β Nsutite Formula: (Mn4+,Mn2+)(O,OH)2 |
β Opal Formula: SiO2 · nH2O Habit: botryoidal Colour: colorless Fluorescence: green Description: Botryoidal formations partly covered by white calcite and quartz. References: |
β Opal var. Opal-AN Formula: SiO2 · nH2O Habit: botryoidal Colour: colorless Fluorescence: green Description: Botryoidal formations partly covered by white calcite and quartz. References: |
β 'Plagioclase' Formula: (Na,Ca)[(Si,Al)AlSi2]O8 |
β Polybasite Formula: [Ag6Sb2S7][Ag9CuS4] |
β 'Psilomelane' |
β Pyrolusite Formula: Mn4+O2 |
β Quartz Formula: SiO2 Description: Crystals in small veinlets. |
β Todorokite Formula: (Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O Localities: |
β Willemite Formula: Zn2SiO4 References: |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
Group 1 - Elements | |||
---|---|---|---|
β | Gold | 1.AA.05 | Au |
Group 2 - Sulphides and Sulfosalts | |||
β | Polybasite | 2.GB.15 | [Ag6Sb2S7][Ag9CuS4] |
Group 3 - Halides | |||
β | Fluorite | 3.AB.25 | CaF2 |
Group 4 - Oxides and Hydroxides | |||
β | Bixbyite-(Mn) | 4.CB.10 | Mn3+2O3 |
β | Quartz | 4.DA.05 | SiO2 |
β | Opal var. Opal-AN | 4.DA.10 | SiO2 Β· nH2O |
β | 4.DA.10 | SiO2 Β· nH2O | |
β | Pyrolusite | 4.DB.05 | Mn4+O2 |
β | Nsutite | 4.DB.15c | (Mn4+,Mn2+)(O,OH)2 |
β | Todorokite | 4.DK.10 | (Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 Β· 3-4H2O |
β | Groutite | 4.FD.10 | Mn3+O(OH) |
β | Manganite | 4.FD.15 | Mn3+O(OH) |
β | Aurorite | 4.FL.20 | Mn2+Mn4+3O7 Β· 3H2O |
β | Chalcophanite | 4.FL.20 | ZnMn4+3O7 Β· 3H2O |
Group 5 - Nitrates and Carbonates | |||
β | Calcite var. Manganese-bearing Calcite | 5.AB.05 | (Ca,Mn)CO3 |
β | 5.AB.05 | CaCO3 | |
Group 9 - Silicates | |||
β | Willemite | 9.AA.05 | Zn2SiO4 |
Unclassified | |||
β | 'Psilomelane' | - | |
β | 'Plagioclase' | - | (Na,Ca)[(Si,Al)AlSi2]O8 |
List of minerals for each chemical element
H | Hydrogen | |
---|---|---|
H | β Aurorite | Mn2+Mn34+O7 · 3H2O |
H | β Chalcophanite | ZnMn34+O7 · 3H2O |
H | β Groutite | Mn3+O(OH) |
H | β Opal var. Opal-AN | SiO2 · nH2O |
H | β Manganite | Mn3+O(OH) |
H | β Nsutite | (Mn4+,Mn2+)(O,OH)2 |
H | β Opal | SiO2 · nH2O |
H | β Todorokite | (Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O |
C | Carbon | |
C | β Calcite | CaCO3 |
C | β Calcite var. Manganese-bearing Calcite | (Ca,Mn)CO3 |
O | Oxygen | |
O | β Aurorite | Mn2+Mn34+O7 · 3H2O |
O | β Bixbyite-(Mn) | Mn23+O3 |
O | β Calcite | CaCO3 |
O | β Chalcophanite | ZnMn34+O7 · 3H2O |
O | β Groutite | Mn3+O(OH) |
O | β Opal var. Opal-AN | SiO2 · nH2O |
O | β Manganite | Mn3+O(OH) |
O | β Calcite var. Manganese-bearing Calcite | (Ca,Mn)CO3 |
O | β Nsutite | (Mn4+,Mn2+)(O,OH)2 |
O | β Opal | SiO2 · nH2O |
O | β Pyrolusite | Mn4+O2 |
O | β Quartz | SiO2 |
O | β Todorokite | (Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O |
O | β Willemite | Zn2SiO4 |
O | β Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
F | Fluorine | |
F | β Fluorite | CaF2 |
Na | Sodium | |
Na | β Todorokite | (Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O |
Na | β Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
Mg | Magnesium | |
Mg | β Todorokite | (Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O |
Al | Aluminium | |
Al | β Todorokite | (Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O |
Al | β Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
Si | Silicon | |
Si | β Opal var. Opal-AN | SiO2 · nH2O |
Si | β Opal | SiO2 · nH2O |
Si | β Quartz | SiO2 |
Si | β Willemite | Zn2SiO4 |
Si | β Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
S | Sulfur | |
S | β Polybasite | [Ag6Sb2S7][Ag9CuS4] |
K | Potassium | |
K | β Todorokite | (Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O |
Ca | Calcium | |
Ca | β Calcite | CaCO3 |
Ca | β Fluorite | CaF2 |
Ca | β Calcite var. Manganese-bearing Calcite | (Ca,Mn)CO3 |
Ca | β Todorokite | (Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O |
Ca | β Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
Mn | Manganese | |
Mn | β Aurorite | Mn2+Mn34+O7 · 3H2O |
Mn | β Bixbyite-(Mn) | Mn23+O3 |
Mn | β Chalcophanite | ZnMn34+O7 · 3H2O |
Mn | β Groutite | Mn3+O(OH) |
Mn | β Manganite | Mn3+O(OH) |
Mn | β Calcite var. Manganese-bearing Calcite | (Ca,Mn)CO3 |
Mn | β Nsutite | (Mn4+,Mn2+)(O,OH)2 |
Mn | β Pyrolusite | Mn4+O2 |
Mn | β Todorokite | (Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O |
Cu | Copper | |
Cu | β Polybasite | [Ag6Sb2S7][Ag9CuS4] |
Zn | Zinc | |
Zn | β Chalcophanite | ZnMn34+O7 · 3H2O |
Zn | β Willemite | Zn2SiO4 |
Sr | Strontium | |
Sr | β Todorokite | (Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O |
Ag | Silver | |
Ag | β Polybasite | [Ag6Sb2S7][Ag9CuS4] |
Sb | Antimony | |
Sb | β Polybasite | [Ag6Sb2S7][Ag9CuS4] |
Ba | Barium | |
Ba | β Todorokite | (Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O |
Au | Gold | |
Au | β Gold | Au |
Other Databases
Link to USGS MRDS: | 10027228 |
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Localities in this Region
- Arizona
- Yuma County
- Kofa Mining District
- King of Arizona Mine
- Kofa 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
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