San Francisco Mine, New Almaden, New Almaden Mining District, Santa Clara County, California, USAi
| Regional Level Types | |
|---|---|
| San Francisco Mine | Mine |
| New Almaden | Town |
| New Almaden Mining District | Mining District |
| Santa Clara County | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
37° 10' 23'' North , 121° 50' 39'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Lexington Hills | 2,421 (2011) | 11.4km |
| Cambrian Park | 3,282 (2018) | 12.0km |
| Seven Trees | 1,788 (2018) | 12.5km |
| Communications Hill | 11,267 (2019) | 12.9km |
| Los Gatos | 30,705 (2017) | 13.0km |
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 |
|---|---|---|
| Santa Clara Valley Gem & Mineral Society | San Jose, California | 19km |
| Santa Cruz Mineral and Gem Society | Santa Cruz, California | 28km |
| Peninsula Gem & Geology Society, Inc. | Los Altos, California | 34km |
| Sequoia Gem and Mineral Society | Redwood City, California | 49km |
A former Hg occurrence/mine located SW of New Almaden, on county owned land (Almaden Quicksilver County Park). Discovered in 1846. MRDS database accuracy for this location is not stated.
Mineralization is hosted in rocks of the Franciscan Complex (Late Cretaceous serpentinite). The ore body is irregular. Controls for ore emplacement included local fracturing and irregularities in a contact. Local alteration includes silica carbonate alteration of serpentine. Local rocks include rocks of the Franciscan melange.
Production data are found in: U.S. Bureau of Mines file data.
Mineralization is hosted in rocks of the Franciscan Complex (Late Cretaceous serpentinite). The ore body is irregular. Controls for ore emplacement included local fracturing and irregularities in a contact. Local alteration includes silica carbonate alteration of serpentine. Local rocks include rocks of the Franciscan melange.
Production data are found in: U.S. Bureau of Mines file data.
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:
| ⓘ Cinnabar Formula: HgS |
| ⓘ 'Serpentine Subgroup' Formula: D3[Si2O5](OH)4 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Cinnabar | 2.CD.15a | HgS |
| Unclassified | |||
| ⓘ | 'Serpentine Subgroup' | - | D3[Si2O5](OH)4 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Serpentine Subgroup | D3[Si2O5](OH)4 |
| O | Oxygen | |
| O | ⓘ Serpentine Subgroup | D3[Si2O5](OH)4 |
| Si | Silicon | |
| Si | ⓘ Serpentine Subgroup | D3[Si2O5](OH)4 |
| S | Sulfur | |
| S | ⓘ Cinnabar | HgS |
| Hg | Mercury | |
| Hg | ⓘ Cinnabar | HgS |
Other Databases
| Link to USGS MRDS: | 10040748 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
- Coast MountainsMountain Range
North America PlateTectonic Plate
- California Coast RangesAccretionary Complex
- Franciscan DomainDomain
USA
- California
- Santa Cruz MountainsMountain Range
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