Newman Mine, Mendenhall Springs, Livermore Mining District (Tesla District), Alameda County, California, USAi
| Regional Level Types | |
|---|---|
| Newman Mine | Mine |
| Mendenhall Springs | Group of Springs |
| Livermore Mining District (Tesla District) | Mining District |
| Alameda County | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
37° 36' 33'' North , 121° 35' 41'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Livermore | 88,126 (2017) | 17.2km |
| Mountain House | 9,675 (2011) | 19.9km |
| Tracy | 87,075 (2017) | 20.8km |
| Pleasanton | 79,510 (2017) | 25.3km |
| Sunol | 913 (2011) | 25.9km |
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 |
|---|---|---|
| Livermore Valley Lithophiles | Livermore, California | 17km |
| Santa Clara Valley Gem & Mineral Society | San Jose, California | 40km |
| Mineral & Gem Society of Castro Valley | Hayward, California | 43km |
| East Bay Mineral and Lapidary Club | Hayward, California | 44km |
| Stockton Lapidary & Mineral Club | Stockton, California | 47km |
A former Cr-Fe occurrence/mine located in the center S½ sec. 1, T4S, R3E, MDM, 5.0 km (3.1 mkiles) ENE of Mendenhall Springs and 12 miles East of Livermore, along the E canyon wall of Corral Hollow Creek. Owned by Mr Taylor, California (1974) and by F. Woodsworth (100%), Redwood City, California (1976). MRDS database stated accuracy for this location is 10 meters.
The ore body strikes N00W and dips 30N. Ore body No. 1 is tabular, disseminated while ore body No. 2 is irregular in a shear zone. A thin, discontinuous seam of ore is in place.The primary mode of origin was magmatic differentiation and the secondary mode of origin was other. Primary ore control was lithology and the secondary control was fracturing. Wallrock alteration is intense (carbonitization). Local rocks include rocks of the Franciscan melange.
The last operator claimed 55% Cr2O3 with a Cr:Fe ratio of 3.5:1.0 was typical.
Analysis by the Division of Mines and Geology in 1976 gave the following percentages: Massive 2: Cr2O3 = 49.33% FeO = 09.35%, total Fe = 12.87%, Al203 = 06.22%, MgO = ?, Cr:Fe = 3.38:1. Disseminated ore: SiO2 = 3.30%, Cr2O3 = 54.81%, FeO = 13.74%, Fe = 16.08%, Al2O3 = 8.29%, MgO = 12.27%, Cr:Fe = 3.0:1.
No reserve estimate was possible. Last operator claimed that good reserves were left.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.Mineral List
1 valid mineral.
Detailed Mineral List:
| ⓘ Quartz Formula: SiO2 References: |
| ⓘ Quartz var. Citrine Formula: SiO2 References: |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| ⓘ | Quartz var. Citrine | 4.DA.05 | SiO2 |
| ⓘ | 4.DA.05 | SiO2 | |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Quartz var. Citrine | SiO2 |
| O | ⓘ Quartz | SiO2 |
| Si | Silicon | |
| Si | ⓘ Quartz var. Citrine | SiO2 |
| Si | ⓘ Quartz | SiO2 |
Other Databases
| Link to USGS MRDS: | 10138157 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
- Coast MountainsMountain Range
North America PlateTectonic Plate
- California Coast RangesAccretionary Complex
- Franciscan DomainDomain
- Sonoma-Livermore BasinBasin
USA
- California
- Diablo RangeMountain Range
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