West Point Mining District, East Belt, Amador County, California, USAi
Regional Level Types | |
---|---|
West Point Mining District | Mining District |
East Belt | - not defined - |
Amador County | County |
California | State |
USA | Country |
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Latitude & Longitude (WGS84):
38° North , 120° West (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~58km
Type:
KΓΆppen climate type:
Mindat Locality ID:
211251
Long-form identifier:
mindat:1:2:211251:3
GUID (UUID V4):
c458a659-6d5a-4003-9be3-c8dc96f6b932
Location: This extensive Sierra Nevada East Belt district is in eastern Amador and Calaveras Counties in the general area of the town of West Point. It includes the Skull Flat, Glencoe, Bummerville, Pioneer Station, and Buckhorn areas.
History: The town was first known as Indian Gulch but was renamed West Point after a geographic
feature discovered by Kit Carson while he was enroute to Sutter's Fort in 1844. The streams and surface ores were mined extensively during the 1850s, when large amounts of gold were recovered. During the 1860s and 1870s many lode mines and 10 or more custom mills were active, but there was much difficulty with sulfides. Some activity was noted from the 1880s until 1914 and again during the 1920s and 1930s. Several mines have been intermittently worked since World War II, the chief operations having been at the Belden, Blackstone, and Centennial mines. This is one of the more productive districts of the east gold belt, and an extremely large number of mines exist.
Geology: The gold deposits are associated with a west-elongated body of granodiorite five miles wide and 15 miles long that has intruded graphitic slates, quartzites, and schists of the Calaveras Formation (Carboniferous to Permian).
Ore Deposits: Numerous north-trending and west-dipping (a few dip east) quartz veins arc found in the granodiorite, or in the adjacent metamorphic rocks. The veins usually are from one to five feet thick, have persistent strikes, and belong to one of three main vein systems that have not been mapped. Narrow diorite, quartz-diorite, and apiilite dikes commonly are associated with the veins. The ore bodies contain free gold and abundant sulfides, especially galena, which is nearly always associated with high-grade ore. The ore shoots usually have horizontal stoping lengths of 150 feet or less, but several were 300 to 400 feet long. Milling-grade ore commonly averages one ounce or more in gold per ton, and much high-grade ore has been recovered. Few of the mines have been developed to depths of more than a few hundred feet. It has been estimated that there are more than 500 mine shafts in the district.
Mines: Amador County: Amador-Columbus; Belden ($400,000+); Black Prince ($100,000+); Defender ($100,000+); Elkhorn; Hageman; Jumbo; Lone Willow ($100,000+); Newman ($160,000+); Pine Grove; Pioneer-Lucky Strike ($300,000+); and the T.N.T.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded from this region.Mineral List
Mineral list contains entries from the region specified including sub-localities12 valid minerals.
Detailed Mineral List:
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 | Bornite | 2.BA.15 | Cu5FeS4 |
β | Sphalerite | 2.CB.05a | ZnS |
β | Chalcopyrite | 2.CB.10a | CuFeS2 |
β | Pyrrhotite | 2.CC.10 | Fe1-xS |
β | Galena | 2.CD.10 | PbS |
β | Pyrite | 2.EB.05a | FeS2 |
β | Marcasite | 2.EB.10a | FeS2 |
β | Arsenopyrite | 2.EB.20 | FeAsS |
Group 4 - Oxides and Hydroxides | |||
β | Quartz | 4.DA.05 | SiO2 |
Group 5 - Nitrates and Carbonates | |||
β | Malachite | 5.BA.10 | Cu2(CO3)(OH)2 |
Group 9 - Silicates | |||
β | Rhodonite | 9.DK.05 | CaMn3Mn[Si5O15] |
Unclassified | |||
β | 'Psilomelane' | - |
List of minerals for each chemical element
H | Hydrogen | |
---|---|---|
H | β Malachite | Cu2(CO3)(OH)2 |
C | Carbon | |
C | β Malachite | Cu2(CO3)(OH)2 |
O | Oxygen | |
O | β Malachite | Cu2(CO3)(OH)2 |
O | β Quartz | SiO2 |
O | β Rhodonite | CaMn3Mn[Si5O15] |
Si | Silicon | |
Si | β Quartz | SiO2 |
Si | β Rhodonite | CaMn3Mn[Si5O15] |
S | Sulfur | |
S | β Arsenopyrite | FeAsS |
S | β Bornite | Cu5FeS4 |
S | β Chalcopyrite | CuFeS2 |
S | β Galena | PbS |
S | β Marcasite | FeS2 |
S | β Pyrite | FeS2 |
S | β Pyrrhotite | Fe1-xS |
S | β Sphalerite | ZnS |
Ca | Calcium | |
Ca | β Rhodonite | CaMn3Mn[Si5O15] |
Mn | Manganese | |
Mn | β Rhodonite | CaMn3Mn[Si5O15] |
Fe | Iron | |
Fe | β Arsenopyrite | FeAsS |
Fe | β Bornite | Cu5FeS4 |
Fe | β Chalcopyrite | CuFeS2 |
Fe | β Marcasite | FeS2 |
Fe | β Pyrite | FeS2 |
Fe | β Pyrrhotite | Fe1-xS |
Cu | Copper | |
Cu | β Bornite | Cu5FeS4 |
Cu | β Chalcopyrite | CuFeS2 |
Cu | β Malachite | Cu2(CO3)(OH)2 |
Zn | Zinc | |
Zn | β Sphalerite | ZnS |
As | Arsenic | |
As | β Arsenopyrite | FeAsS |
Au | Gold | |
Au | β Gold | Au |
Pb | Lead | |
Pb | β Galena | PbS |
Localities in this Region
- California
- Amador County
- East Belt
- West Point Mining District
- Amador-Columbus Mine
- Barton
- Ajax Mine
- Belden Mine
- Black Prince Mine [1] (Coeur Leonis Mine; Coeur Leenie Mine; Coeur Leonie claim; Coeur Leonie Fraction claim; Aurora claim)
- Echo Restoration and other claims (Echo Restoration claim; Economy Restoration claim; Restoration Nos. 1-4 claims)
- Enoch prospect
- Jumbo Mine
- Levaggi Mine
- Modoc prospect (Modol)
- Penavita Mine
- Pine Grove Mine
- TNT Mine
- Unnamed Au mine [38]
- Mount Crossman
- Pioneer
- West Point Mining District
- East Belt
- Amador County
- California
- Amador County
- East Belt
- West Point Mining District
- Pioneer
- Honula occurrence (Honolulu Laby)
- Jack occurrence
- Jill occurrence
- Katherine and Adeline prospect
- Kimball group (Lucky Strike claim [or Pioneer Luck Strike claim])
- Lone Willow Mine (Lone Willow group; Old Lone Willow; California; Mungo Park)
- Lucky Girl occurrence
- Mexican Mine (Reed Flat)
- Midway and Esmeralda prospect
- Mungo Park claim
- Newman Mine
- Nottus Mine
- Oro Grande occurrence
- Pick and Drill occurrence
- Pine View No. 1 lode claim
- Pioneer Lucky Strike Mine (Madrona Mine; Pioneer-Lucky Star Mine; Harding Mine; Madrona group; Moar Brothers; Lucky Strike Mine)
- Red Tape Mine
- Ruhser and Hubberty deposit
- Somerset occurrence
- Tierakoff Mine (Tierakoff and Crown Point; Badger claim; Golden Eagle claim; Lucky Girl claim)
- Tom and Dick occurrence
- Trench occurrence (Trencher)
- Trojan and North Trojan claims (Trojan and N. Trojan; Trojan & N. Trojan)
- Unknown Au occurrence [30]
- Unnamed Au placer gravel deposit [18]
- Unspecified Mn occurrence [1]
- Velvet Mine
- West Somerset occurrence
- Pioneer
- West Point Mining District
- East Belt
- Amador County
Other Regions, Features and Areas containing this locality
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