San Mateo Mine, New Almaden, New Almaden Mining District, Santa Clara County, California, USAi
| Regional Level Types | |
|---|---|
| San Mateo Mine | Mine |
| New Almaden | - not defined - |
| New Almaden Mining District | Mining District |
| Santa Clara County | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
37° 11' 58'' North , 121° 52' 32'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Cambrian Park | 3,282 (2018) | 8.0km |
| Los Gatos | 30,705 (2017) | 9.2km |
| Lexington Hills | 2,421 (2011) | 9.4km |
| Communications Hill | 11,267 (2019) | 10.1km |
| Seven Trees | 1,788 (2018) | 10.1km |
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 | 16km |
| Santa Cruz Mineral and Gem Society | Santa Cruz, California | 29km |
| Peninsula Gem & Geology Society, Inc. | Los Altos, California | 29km |
| Sequoia Gem and Mineral Society | Redwood City, California | 45km |
A former Hg occurrence/mine located in the SW¼SE¼SE¼ sec. 29, T8S, R1E, MDM, about 5.4 km WNW of New Almaden, along the N shore of the northern half of the Guadalupe Reservoir, on county owned land (Almaden Quicksilver County Park). Discovered prior to 1860. Produced during the periods 1860 to 1870, 1899 to 1901, 1915 to 1917, and 1935 to 1940. MRDS database stated accuracy for this location is 100 meters.
Mineralization is hosted in Late Cretaceous siltstone. Controls for ore emplacement included locally extensive shearing and NW-trending faults. Local alteration includes silicification and argillization along faults. Local rocks include Franciscan Complex, unit 1 (Coast Ranges).
Local structures include faults striking N55W.
Workings include unspecified underground openings (the topo map reflects 1 adit symbol at this point).
Production data are found in: Bailey and Everhart (1964).
Production statistics: Year: 1940 (period = to 1940): Hg (estimated): ^1% Hg.
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
3 valid minerals.
Rock Types Recorded
Note: data is currently VERY limited. Please bear with us while we work towards adding this information!
Select Rock List Type
Alphabetical List Tree DiagramGallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Cinnabar | 2.CD.15a | HgS |
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Dolomite | 5.AB.10 | CaMg(CO3)2 |
List of minerals for each chemical element
| C | Carbon | |
|---|---|---|
| C | ⓘ Dolomite | CaMg(CO3)2 |
| O | Oxygen | |
| O | ⓘ Dolomite | CaMg(CO3)2 |
| Mg | Magnesium | |
| Mg | ⓘ Dolomite | CaMg(CO3)2 |
| S | Sulfur | |
| S | ⓘ Cinnabar | HgS |
| S | ⓘ Pyrite | FeS2 |
| Ca | Calcium | |
| Ca | ⓘ Dolomite | CaMg(CO3)2 |
| Fe | Iron | |
| Fe | ⓘ Pyrite | FeS2 |
| Hg | Mercury | |
| Hg | ⓘ Cinnabar | HgS |
Other Databases
| Link to USGS MRDS: | 10040754 |
|---|
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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