Barrett Mine, Hunter Valley Mountain, Hunter Valley Mining District, West Belt, Mariposa County, California, USAi
| Regional Level Types | |
|---|---|
| Barrett Mine | Mine |
| Hunter Valley Mountain | Mountain |
| Hunter Valley Mining District | Mining District |
| West Belt | - not defined - |
| Mariposa County | County |
| California | State |
| USA | Country |
This page is currently not sponsored. Click here to sponsor this page.
Latitude & Longitude (WGS84):
37° 38' 16'' North , 120° 14' 23'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Coulterville | 201 (2011) | 8.9km |
| Bear Valley | 125 (2011) | 13.1km |
| Greeley Hill | 915 (2011) | 15.3km |
| Snelling | 231 (2011) | 21.8km |
| Groveland | 601 (2011) | 22.3km |
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
Local clubs are the best way to get access to collecting localities
| Club | Location | Distance |
|---|---|---|
| Mariposa Gem & Mineral Club | Mariposa, California | 29km |
Other/historical names associated with this locality:
Baretta Mine; Barette Mine; Beaudry Mine; Wildcat claim; Mountaineer claim; New Year claim
A former lode Au-Zn-Cu mine located in secs. 29, 30 & 32, T3S, R16E, MDM, 1.3 km (4,300 feet) WSW of Hunter Valley Mountain (coordinates of record) and E of Webb Station, on private (patented) land. Discovered in 1865. Property consists of 3 patented claims plus a rectangular piece of land known as Berettas enclosure, which includes most of the old Barrett and Beaudry claims. Produced during the period 1931-1932. Operated by Angelo Beaudry and Inez Bouvier. MRDS database stated accuracy for this location is 1,000 meters.
Mineralization is a vein deposit hosted in greenstone. The wall rocks are chiefly meta-augite andesite greenstone, although chert has been described in workings. None was found. The greenstone is part of the Penon Blanco member of the Upper Jurassic Amador Group. Rhythmically banded chert and associated sedimentary rocks of the Hunter Valley chert member of the Amador group is exposed along the road S of the mine. It strikes N40W, 63NE. It is assumed that the greenstone trends in the same direction. Local rocks include Mesozoic volcanic rocks, unit 2 (Western Sierra Foothills and Western Klamath Mountains).
Workings include underground openings with an overall depth of 60.96 meters and comprised of a 200 foot shaft in 1920, plus an adit driven NE to intersect the NW-trending ore zone.
Production data are found in: Bowen, O.E., Jr. & C.H. Gray, Jr. (1957).
Production information: Has produced pocket gold ore and gold ore of milling grade as well as high-grade, oxidized and sulfide Cu ores. $90,000 (period values) in Au realized from this mine up to 1907.
Analytical data results: Au 0.04 ounces/ton; Cu 13.32%, Zn 2.0%, Fe 28.51%, insolubles 22.7%.
Mineralization is a vein deposit hosted in greenstone. The wall rocks are chiefly meta-augite andesite greenstone, although chert has been described in workings. None was found. The greenstone is part of the Penon Blanco member of the Upper Jurassic Amador Group. Rhythmically banded chert and associated sedimentary rocks of the Hunter Valley chert member of the Amador group is exposed along the road S of the mine. It strikes N40W, 63NE. It is assumed that the greenstone trends in the same direction. Local rocks include Mesozoic volcanic rocks, unit 2 (Western Sierra Foothills and Western Klamath Mountains).
Workings include underground openings with an overall depth of 60.96 meters and comprised of a 200 foot shaft in 1920, plus an adit driven NE to intersect the NW-trending ore zone.
Production data are found in: Bowen, O.E., Jr. & C.H. Gray, Jr. (1957).
Production information: Has produced pocket gold ore and gold ore of milling grade as well as high-grade, oxidized and sulfide Cu ores. $90,000 (period values) in Au realized from this mine up to 1907.
Analytical data results: Au 0.04 ounces/ton; Cu 13.32%, Zn 2.0%, Fe 28.51%, insolubles 22.7%.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Chalcopyrite Formula: CuFeS2 |
| ⓘ Malachite Formula: Cu2(CO3)(OH)2 |
| ⓘ Pyrite Formula: FeS2 |
| ⓘ Quartz Formula: SiO2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Malachite | 5.BA.10 | Cu2(CO3)(OH)2 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Malachite | Cu2(CO3)(OH)2 |
| C | Carbon | |
| C | ⓘ Malachite | Cu2(CO3)(OH)2 |
| O | Oxygen | |
| O | ⓘ Malachite | Cu2(CO3)(OH)2 |
| O | ⓘ Quartz | SiO2 |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| S | Sulfur | |
| S | ⓘ Chalcopyrite | CuFeS2 |
| S | ⓘ Pyrite | FeS2 |
| Fe | Iron | |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Fe | ⓘ Pyrite | FeS2 |
| Cu | Copper | |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
| Cu | ⓘ Malachite | Cu2(CO3)(OH)2 |
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Foothills-Wallowa DomainDomain
- Sierra Nevada BatholithVolcanic Arc
USA
- California
- Mother Lode BeltBelt
- Sierra NevadaMountain Range
This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to
visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders
for access and that you are aware of all safety precautions necessary.
References
(n.d.) Minerals Availability System (MAS), U.S. Bureau of Mines.file ID #0060430104
Aubury, Lewis E. (1905) The Copper Resources of California. Bulletin 23. California State Mining Bureau pp.206-215
(1908, September) The Copper Resources of California. Bulletin 50. California State Mining Bureaup.268
