Spring Hill Mine, Spring Hill vein, Grass Valley, Grass Valley Mining District, Nevada County, California, USAi
| Regional Level Types | |
|---|---|
| Spring Hill Mine | Mine |
| Spring Hill vein | Vein |
| Grass Valley | Valley |
| Grass Valley Mining District | Mining District |
| Nevada County | County |
| California | State |
| USA | Country |
This page is currently not sponsored. Click here to sponsor this page.
Latitude & Longitude (WGS84):
39° 13' 34'' North , 121° 2' 32'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Grass Valley | 12,944 (2017) | 1.8km |
| Nevada City | 3,152 (2017) | 4.5km |
| Rough and Ready | 963 (2011) | 8.1km |
| Alta Sierra | 6,911 (2011) | 9.5km |
| Penn Valley | 1,621 (2011) | 13.2km |
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 | 2km |
| Sutter Buttes Gem & Mineral Society | Marysville, California | 48km |
A former lode Au-Cu-Ag occurrence/mine located in the NE¼ sec. 26 & in sec. 23, T16N, R8E, MDM, about 4 km NE of Grass Valley proper, ESE of the Sierra Nevada Memorial Hospital, on private (patented) land. The property comprises 30 acres. MRDS database stated accuracy for this location is 500 meters.
Mineralization is a vein deposit hosted in diabase, serpentinite, diorite and greenstone. The ore body strikes E and dips S. Local alteration includes greenstones that are highly carbonitized along veins. Local rocks include ultramafic rocks, chiefly Mesozoic, unit 2 (Western Sierra Nevada and Klamath Mountains).
Local geologic structures include faulting (?).
Workings include underground openings with a length of 914.4 meters and an overall depth of 579.12 meters and comprised of a shaft, drifts, crosscuts, raises and approximately 6,000 feet of diamond drilling holes.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ 'Chlorite Group' |
| ⓘ Native Gold Formula: Au |
| ⓘ Quartz Formula: SiO2 |
| ⓘ Talc Formula: Mg3Si4O10(OH)2 |
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 |
| Group 9 - Silicates | |||
| ⓘ | Talc | 9.EC.05 | Mg3Si4O10(OH)2 |
| Unclassified | |||
| ⓘ | 'Chlorite Group' | - | |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Talc | Mg3Si4O10(OH)2 |
| O | Oxygen | |
| O | ⓘ Quartz | SiO2 |
| O | ⓘ Talc | Mg3Si4O10(OH)2 |
| Mg | Magnesium | |
| Mg | ⓘ Talc | Mg3Si4O10(OH)2 |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| Si | ⓘ Talc | Mg3Si4O10(OH)2 |
| Au | Gold | |
| Au | ⓘ Native Gold | Au |
Other Databases
| Link to USGS MRDS: | 10101243 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Foothills-Wallowa 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.
References
(n.d.) Minerals Availability System (MAS), U.S. Bureau of Mines.file #0060570321
Logan, C. A. (1941) Mineral Resources of Nevada County. California Journal of Mines and Geology, 37 (3). 374-468pages 429,. 464
Spring Hill Mine, Spring Hill vein, Grass Valley, Grass Valley Mining District, Nevada County, California, USA