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Winship properties [2], Cedar Mountain, Cedar Mountain Mining District, Alameda Co., California, USAi
Regional Level Types
Winship properties [2]- not defined -
Cedar MountainMountain
Cedar Mountain Mining DistrictMining District
Alameda Co.County
CaliforniaState
USACountry

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Key
Latitude & Longitude (WGS84):
37° 33' 11'' North , 121° 35' 48'' West
Latitude & Longitude (decimal):
Nearest Settlements:
PlacePopulationDistance
Livermore88,126 (2017)20.8km
Tracy87,075 (2017)25.6km
Mountain House9,675 (2011)26.0km
Sunol913 (2011)26.1km
East Foothills8,269 (2011)27.3km


A magnesite occurrence located in the center S½ sec. 25, in the SE¼ sec. 34 and in the S½ sec. 35, T4S, R3E, MDM, 1.1 km (0.7 mile; 3,500 feet) SE of Cedar Mountain (coordinates of record), along the E slope of Cedar Mountain Ridge, on private land. Owned by the K. D. Winship estate. MRDS database stated accuracy for this location is 1,000 meters.

The property in sec. 25 was worked by lessees in 1917, who prospected and performed some development work. Some of the larger patches in sec. 34 were worked at the Magnesia Mine. Transportation would be difficult to these areas since they lie in a rather deep canyon, a branch of the Arroyo del Valle. BIM stated that there were no minerals in S½ sec. 34.

Local rocks include rocks of the Franciscan melange.

Workings include some prospecting and development work.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.


Mineral List


1 valid mineral.

Detailed Mineral List:

Magnesite
Formula: MgCO3
Reference: Bradley, W.W. (1925), Magnesite in California: California Mining Bureau. Bulletin 79: 42-43. Davis, Fenelon Francis (1950), Mines and mineral resources of Alameda County, California: California Journal of Mines and Geology: 46(2): 343, Pl. 58; U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.

List of minerals arranged by Strunz 10th Edition classification

Group 5 - Nitrates and Carbonates
Magnesite5.AB.05MgCO3

List of minerals arranged by Dana 8th Edition classification

Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Magnesite14.1.1.2MgCO3

List of minerals for each chemical element

CCarbon
C MagnesiteMgCO3
OOxygen
O MagnesiteMgCO3
MgMagnesium
Mg MagnesiteMgCO3

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Harder, Edmund Cecil (1910), Some chromite deposits in western and central California: USGS Bulletin 430: 173.
Bradley, W.W. (1925), Magnesite in California: California Mining Bureau. Bulletin 79: 42-43.
Huey, Arthur Sidney (1948), Geology of the Tesla quadrangle, California California Division Mines Bulletin 140, 75 pp.: Pl. 1 (geology).
Davis, Fenelon Francis (1950), Mines and mineral resources of Alameda County, California: California Journal of Mines and Geology: 46(2): 343, Pl. 58.
USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10027984 & 10283960.
U.S. Bureau of Mines Minerals Availability System/Mineral Industry Location System (MAS/MILS): file #0060010041.

USGS MRDS Record:10027984

Other Regions, Features and Areas containg this locality

North America
North America PlateTectonic Plate
USA

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.
 
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