Bernal Mine, New Almaden, New Almaden Mining District, Santa Clara County, California, USAi
| Regional Level Types | |
|---|---|
| Bernal 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° 13' 11'' North , 121° 47' 31'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Seven Trees | 1,788 (2018) | 8.4km |
| Communications Hill | 11,267 (2019) | 9.5km |
| Cambrian Park | 3,282 (2018) | 12.9km |
| Buena Vista | 1,704 (2018) | 15.7km |
| Morgan Hill | 42,948 (2017) | 15.7km |
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 |
| Peninsula Gem & Geology Society, Inc. | Los Altos, California | 34km |
| Santa Cruz Mineral and Gem Society | Santa Cruz, California | 35km |
| Sequoia Gem and Mineral Society | Redwood City, California | 49km |
Mindat Locality ID:
92207
Long-form identifier:
mindat:1:2:92207:9
GUID (UUID V4):
e2ca99d9-2b43-42d8-94ea-0ab7a4cba7b1
A former Hg occurrence/mine located in the center SE¼ sec. 19, T8S, R2E, MDM, about 5.0 km NNE of New Almaden and 5.5 km (3.4 miles) SSE of Edenvale neighborhood proper, along the northern slope of the Santa Teresa Hills, on former private land, now on county owned park land (Santa Teresa County Park). Discovered prior to 1918. Owned by Pedro A. Bernal. MRDS database stated accuracy for this location is 100 meters. Inactive since 1918.
Mineralization is hosted in Late Cretaceous serpentinite. The ore body is irregular. Controls for ore emplacement included local fracturing. Local alteration includes silica carbonate alteration of serpentine. Local rocks include rocks of the Franciscan Complex, unit 1 (Coast Ranges).
Local geologic structures include local fracturing; and a clay-serpentine contact.
Workings include unspecified underground openings with a length of 60.96 meters (the topo map reflects 1 adit symbol and 1 shaft symbol labeled as this mine at this point).
Production information: Ore ran 3 pounds Hg per ton.
No visible reserves.
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 DiagramDetailed Mineral List:
| ⓘ Cinnabar Formula: HgS |
| ⓘ Dolomite Formula: CaMg(CO3)2 |
| ⓘ Quartz Formula: SiO2 |
| ⓘ '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 |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Dolomite | 5.AB.10 | CaMg(CO3)2 |
| Unclassified | |||
| ⓘ | 'Serpentine Subgroup' | - | D3[Si2O5](OH)4 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Serpentine Subgroup | D3[Si2O5](OH)4 |
| C | Carbon | |
| C | ⓘ Dolomite | CaMg(CO3)2 |
| O | Oxygen | |
| O | ⓘ Dolomite | CaMg(CO3)2 |
| O | ⓘ Quartz | SiO2 |
| O | ⓘ Serpentine Subgroup | D3[Si2O5](OH)4 |
| Mg | Magnesium | |
| Mg | ⓘ Dolomite | CaMg(CO3)2 |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| Si | ⓘ Serpentine Subgroup | D3[Si2O5](OH)4 |
| S | Sulfur | |
| S | ⓘ Cinnabar | HgS |
| Ca | Calcium | |
| Ca | ⓘ Dolomite | CaMg(CO3)2 |
| Hg | Mercury | |
| Hg | ⓘ Cinnabar | HgS |
Other Databases
| Link to USGS MRDS: | 10040736 |
|---|
Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Franciscan DomainDomain
USA
- California
- Santa Cruz MountainsMountain Range
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References
