Arcade Mine, Plumbago, Alleghany Mining District (Forest Mining District), Sierra County, California, USAi
| Regional Level Types | |
|---|---|
| Arcade Mine | Mine |
| Plumbago | - not defined - |
| Alleghany Mining District (Forest Mining District) | Mining District |
| Sierra County | County |
| California | State |
| USA | Country |
This page is currently not sponsored. Click here to sponsor this page.
Latitude & Longitude (WGS84):
39° 27' 30'' North , 120° 49' 27'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Washington | 185 (2011) | 11.2km |
| Downieville | 282 (2011) | 11.2km |
| Pike | 134 (2011) | 15.1km |
| Camptonville | 158 (2011) | 19.3km |
| Sierra City | 221 (2011) | 20.2km |
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 |
|---|---|---|
| Nevada County Gem & Mineral Society | Grass Valley, California | 33km |
A former lode Au occurrence/mine located in the SE¼SW¼ (estimated) sec. 2, T18N, R10E, MDM, 0.9 km (0.5 mile) NW of Plumbago and 0.9 km (0.6 mile) ESE of Chips Flat (1 mile SE of Alleghany), on National Forest land. MRDS database stated accuracy for this location is 100 meters.
Mineralization is a vein deposit hosted in slate, schist, gabbro and diorite. The ore body strikes N30W and dips 50NE. The country rock in the upper adit is dark slate and schist. Only one distinct vein is present, although a little quartz occurs in an E-dipping slip that may be the vein of the lower adit. Wallrocks of the lower adit are amphibolite schist and slaty phases, also cut by gabbro and diorite dikes with some greenstone tuffaceous schist and sheared black schist. Two veins and a third which may unite with one. Steeply-dipping gouge is present. Evidence of post-mineralization fault movement observed, especially in the lower adit. The E vein is displaced by a fault at small angle to the vein. Local rocks include undivided pre-Cenozoic metavolcanic rocks, unit 2 (undivided) and/or Mesozoic gabbroic rocks, unit 2 (undivided).
Workings include surface and underground openings comprised of 2 adits, the first is 1,200 feet N of the Irelan Mine and the second is below.
Production data are found in: Ferguson, Henry G. & R.W. Gannett (1932).
Produced not more than a few hundred dollars worth (of Au - period values). No other production record was found.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ 'Amphibole Supergroup' Formula: AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 Description: Occurs as amphibole schist. |
| ⓘ Native Gold Formula: Au |
| ⓘ Quartz Formula: SiO2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Gold | 1.AA.05 | Au |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| Unclassified | |||
| ⓘ | 'Amphibole Supergroup' | - | AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Amphibole Supergroup | AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
| O | Oxygen | |
| O | ⓘ Amphibole Supergroup | AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
| O | ⓘ Quartz | SiO2 |
| F | Fluorine | |
| F | ⓘ Amphibole Supergroup | AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
| Al | Aluminium | |
| Al | ⓘ Amphibole Supergroup | AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
| Si | Silicon | |
| Si | ⓘ Amphibole Supergroup | AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
| Si | ⓘ Quartz | SiO2 |
| Cl | Chlorine | |
| Cl | ⓘ Amphibole Supergroup | AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
| Ti | Titanium | |
| Ti | ⓘ Amphibole Supergroup | AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
| Au | Gold | |
| Au | ⓘ Native Gold | Au |
Other Databases
| Link to USGS MRDS: | 10086508 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Calaveras-Baker DomainDomain
- Sierra Nevada BatholithVolcanic Arc
USA
- Sierra NevadaMountain 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.
