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Graniteville Mining District (Eureka Mining District), Nevada County, California, USAi
Regional Level Types
Graniteville Mining District (Eureka Mining District)Mining District
Nevada CountyCounty
CaliforniaState
USACountry

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Latitude & Longitude (WGS84):
39° North , 120° West (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~68km
Mindat Locality ID:
267699
Long-form identifier:
mindat:1:2:267699:2
GUID (UUID V4):
0


NOTE: There is no USGS MRDS database file for this district. Clark (1970a) presents a list of mines for this district. Several of these are attributed to the Washington District by the USGS MRDS database. Those localities N of South Yuba River are included in this district, those S of it are included in the Washington District.

Location and History: This district is in east-central Nevada County about 30 miles east of Nevada City. It is also known as the Eureka district. An extensive belt of gold mineralization in this region extends from the vicinity of the town of Graniteville SSE to the Emigrant Gap district, a distance of about 10 miles. The district includes the Gaston mine area, which sometimes has been classified as a separate district. The Alleghany-Washington gold belt lies a few miles to the west, and the American Hill district is to the north. The Graniteville district was first placer-mined during the gold rush, and quartz mining began soon afterward. Considerable mining activity continued from the 1860's until about 1900, and there was much activity again during the 1930's. The Ancho-Erie and a few other mines were worked for a short time after World War II.

Geology: The district is underlain by slate, schist, and phyllite of the Blue Canyon Formation (Carboniferous) in the west and granodiorite in the east. In addition, there are several patches of Tertiary gravel and several glacial moraines.

Ore Deposits: Three main north-striking vein systems
run through the district. One in the western portion of the district is in slate and schist and contains the Culbertson, National, and Ancho-Erie mines. One to the east is in granodiorite and contains the Wisconsin, Baltic, and Iowa mines. The veins in the central system are along the slate-granodiorite contact. Properties in the central system include the Rocky Glen and Gaston mines. The quartz veins are as much as 15 feet thick. The ore contains free gold and varying amounts of auriferous sulfides. The milling ore usually averages ยฝ ounce per ton or less with very little high grade. Some of the ore shoots had stoping lengths of several hundred feet. The veins were mined to depths of as much as 500 feet. The Tertiary gravels at Graniteville and at Shands two miles to the W have yielded some gold.

Mines: Alpha; Ancho-Erie ($1,000,000 +); Anderson; Artie; Azalie; Baltic; Barren; Birchville; Blue Bell; Celina Flat; Cooley; Culbertson; Eagle Bird; Gaston ($2 million [?]); German; Gold Bug; Hotwater; Iowa; IXL; Jim; Keller; Last Chance; Lindsay; Mountain View; National; Rainbow; Rattlesnake; Republic; Rocky Glen ($1,300,000 +); Star; Washington; Wisconsin; Yellow Metal; Yuba ($2 million +).

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List

Mineral list contains entries from the region specified including sub-localities

5 valid minerals.

Detailed Mineral List:

โ“˜ Galena
Formula: PbS
Localities:
โ“˜ Native Gold
Formula: Au
Localities: Reported from at least 31 localities in this region.
โ“˜ Pyrite
Formula: FeS2
Localities:
โ“˜ Pyromorphite
Formula: Pb5(PO4)3Cl
โ“˜ Quartz
Formula: SiO2
Localities: Reported from at least 27 localities in this region.

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
โ“˜Native Gold1.AA.05Au
Group 2 - Sulphides and Sulfosalts
โ“˜Galena2.CD.10PbS
โ“˜Pyrite2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
โ“˜Quartz4.DA.05SiO2
Group 8 - Phosphates, Arsenates and Vanadates
โ“˜Pyromorphite8.BN.05Pb5(PO4)3Cl

List of minerals for each chemical element

OOxygen
Oโ“˜ PyromorphitePb5(PO4)3Cl
Oโ“˜ QuartzSiO2
SiSilicon
Siโ“˜ QuartzSiO2
PPhosphorus
Pโ“˜ PyromorphitePb5(PO4)3Cl
SSulfur
Sโ“˜ GalenaPbS
Sโ“˜ PyriteFeS2
ClChlorine
Clโ“˜ PyromorphitePb5(PO4)3Cl
FeIron
Feโ“˜ PyriteFeS2
AuGold
Auโ“˜ Native GoldAu
PbLead
Pbโ“˜ GalenaPbS
Pbโ“˜ PyromorphitePb5(PO4)3Cl

Localities in this Region

Other Regions, Features and Areas containing this locality

North AmericaContinent
North America PlateTectonic Plate
USA

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