Black Point Adit Mine, Eagle Peak, Clayton, Contra Costa County, California, USAi
| Regional Level Types | |
|---|---|
| Black Point Adit Mine | Mine |
| Eagle Peak | Peak |
| Clayton | City |
| Contra Costa County | County |
| California | State |
| USA | Country |
This page is currently not sponsored. Click here to sponsor this page.
Latitude & Longitude (WGS84):
37° 54' 33'' North , 121° 57' 30'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| North Gate | 679 (2017) | 3.5km |
| Clayton | 11,867 (2017) | 4.0km |
| Diablo | 1,158 (2011) | 8.3km |
| Waldon | 5,364 (2011) | 8.7km |
| Contra Costa Centre | 5,364 (2017) | 8.9km |
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 |
|---|---|---|
| Contra Costa Mineral & Gem Society | Concord, California | 10km |
| Antioch Lapidary Club | Antioch, California | 17km |
| Northern California Geological Society | Orinda, California | 20km |
| East Bay Mineral and Lapidary Club | Hayward, California | 29km |
| Mineral & Gem Society of Castro Valley | Hayward, California | 29km |
A Cu-Hg occurrence/mine located in the NW¼NE¼ sec. 27, T1N, R1W, MDM, 2.1 km (1.3 miles) WNW of nEagle Peak (coordinates of record), 4.1 km (2.5 miles) SSW of Clayton, and 5.1 km (3.1 miles) W of Mount Diablo (coordinates of record), on state owned land (Mount Diablo State Park). MRDS database stated accuracy for this location is 500 meters.
Mineralization is a vein deposit hosted in diabase. The deposit is in a shear zone and consists of a network of Cu veinlets. Chrysocolla and copper oxides occur in a network of carbonate veins in diabase. A trace of Hg was detected in an ore specimen. Local rocks include Mesozoic volcanic rocks, unit 1 (Coast Ranges).
Workings include underground openings comprised of an adit bearing N80W at over 50 feet long with a winze 30 feet from the portal dipping N.
Production of Cu from the Mount Zion (?) Mine i9n 1912 and 1918 less than 40,000 pounds.
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.
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:
| ⓘ Chrysocolla Formula: Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 9 - Silicates | |||
|---|---|---|---|
| ⓘ | Chrysocolla | 9.ED.20 | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| O | Oxygen | |
| O | ⓘ Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| Al | Aluminium | |
| Al | ⓘ Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| Si | Silicon | |
| Si | ⓘ Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| Cu | Copper | |
| Cu | ⓘ Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
Other Databases
| Link to USGS MRDS: | 10029572 |
|---|
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
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.
