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Gibsonville Mining District, Sierra County, California, USAi
| Regional Level Types | |
|---|---|
| Gibsonville Mining District | Mining District |
| Sierra County | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
39° North , 120° West (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~49km
Type:
Köppen climate type:
Location: This placer-mining district is in northwestern Sierra County and southern Plumas County in the vicinity of the old town of Gibsonville. It is about 6 miles NE of La Porte and 20 miles due N of Downieville. The district includes the Whiskey Diggings, Hepsidam, and Bunker Hill areas.
History: The area was first worked during the gold rush, and considerable drift mining and some hydraulic mining followed in 1875-1895. There has been intermittent prospecting
since.
Geology: The deposits are located on the Tertiary North Fork of the Yuba River, which is also known as the La Porte channel. The channel extends in a southwesly direction through the district. The channel gravels are as much as ,500 feet wide and capped by thick beds of andesite and clay. The gold was found mostly in quartz-rich gravels near bedrock and was mostly coarse-grained. Some ground yielded up to $3
(period values) per cubic yard of gold at the old price. There are a number of drops in the channel, caused possibly by bedrock faulting. The bedrock consists of amphibolite with serpentine, slate, and schist lying to the east. The channel has been drift-mined almost continuously from
Hepsidam southwest through Gibsonville to the Thistle shaft, a distance of about five miles. Although the district is reported to have had only a moderate output, extensive drifting and a number of rich pay streaks indicate that it must have been much more productive than originally believed.
Mines: Bellevue group, Bunker Hill, Empire, Feather Fork (Thistle), Garnet, Gibsonville Water and Mining (hydraulic), Homestake, Taber (Hal Taber), Union-Keystone ($600,000), Washington
(North American Cons.) (hydraulic), Whiskey (hydraulic).
History: The area was first worked during the gold rush, and considerable drift mining and some hydraulic mining followed in 1875-1895. There has been intermittent prospecting
since.
Geology: The deposits are located on the Tertiary North Fork of the Yuba River, which is also known as the La Porte channel. The channel extends in a southwesly direction through the district. The channel gravels are as much as ,500 feet wide and capped by thick beds of andesite and clay. The gold was found mostly in quartz-rich gravels near bedrock and was mostly coarse-grained. Some ground yielded up to $3
(period values) per cubic yard of gold at the old price. There are a number of drops in the channel, caused possibly by bedrock faulting. The bedrock consists of amphibolite with serpentine, slate, and schist lying to the east. The channel has been drift-mined almost continuously from
Hepsidam southwest through Gibsonville to the Thistle shaft, a distance of about five miles. Although the district is reported to have had only a moderate output, extensive drifting and a number of rich pay streaks indicate that it must have been much more productive than originally believed.
Mines: Bellevue group, Bunker Hill, Empire, Feather Fork (Thistle), Garnet, Gibsonville Water and Mining (hydraulic), Homestake, Taber (Hal Taber), Union-Keystone ($600,000), Washington
(North American Cons.) (hydraulic), Whiskey (hydraulic).
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded from this region.Mineral List
Mineral list contains entries from the region specified including sub-localities3 valid minerals.
Detailed Mineral List:
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Gold | 1.AA.05 | Au |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Magnesiochromite | 4.BB.05 | MgCr2O4 |
| ⓘ | Quartz | 4.DA.05 | SiO2 |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Magnesiochromite | MgCr2O4 |
| O | ⓘ Quartz | SiO2 |
| Mg | Magnesium | |
| Mg | ⓘ Magnesiochromite | MgCr2O4 |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| Cr | Chromium | |
| Cr | ⓘ Magnesiochromite | MgCr2O4 |
| Au | Gold | |
| Au | ⓘ Native Gold | Au |
Localities in this Region
- California
- Sierra County
- Gibsonville Mining District
- Gibsonville
- Bottle Flat Mine (Unidentified working)
- Bunker Hill Mine
- Feather Fork occurrence
- Garnet placer prospect
- Gibsonville Consolidated Mine
- Gibsonville Consolidated Placer [1]
- Gibsonville Mine (Watson Mine; Nevada Mine)
- Gibsonville Mining Company placer (Gibsonville Mng Co)
- Gibsonville property (Six 6 claims)
- Manchester Mine (Boston Mine)
- Margaret Placer Mine
- Gibsonville
- Gibsonville Mining District
- Sierra County
- California
- Sierra County
- Gibsonville Mining District
- Gibsonville
- Marguerite prospect
- Michigan placer prospect
- Niagara Mine
- North American Consolidated placer prospect (North American Consolidated Mining Company; North American Consolidated Mng Co.)
- Pilot Peak placer prospect
- Slate Creek placers
- Taber Mine
- Unidentified Au mine [11]
- Unidentified Au mine [44]
- Unidentified Au mine [48]
- Union Keystone Mine
- Washington placer prospect
- Woodacre Mine
- Gibsonville
- Gibsonville Mining District
- Sierra County
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Shoofly-Olds Ferry 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
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for access and that you are aware of all safety precautions necessary.
References
