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Dorleska Mine, Preachers Peak, Klamath Mountains, Trinity Co., California, USAi
Regional Level Types
Dorleska MineMine
Preachers PeakPeak
Klamath MountainsMountain Range
Trinity Co.County
CaliforniaState
USACountry

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Key
Latitude & Longitude (WGS84):
41° 3' 29'' North , 122° 54' 30'' West
Latitude & Longitude (decimal):
Locality type:
Nearest Settlements:
PlacePopulationDistance
Coffee Creek217 (2011)17.1km
Trinity Center267 (2011)19.4km
Weaverville3,600 (2011)36.5km
Junction City680 (2011)38.1km
Lewiston1,193 (2011)39.9km


A former Au-Ag-Pb mine located in the SE¼ sec. 17 & in the NE¼NE¼ sec. 20, T37N, R9W, MDM, 0.7 km (2,100 feet) ESE of Preachers Peak (1.8 miles NW of Union Lake), on Bureau of Land Management land (Trinity Alps Wilderness). Discovered 1897-1898. First production was in 1899. MRDS database stated accuracy for this location is 100 meters.

Mineralization is hosted in lamprophyre, serpentinite, and schist. The ore body strikes N16E and dips 75W. Ore control was a fault zone. This deposit is an extension to the N of the same system of veins and lamprophyre dikes found in the Yellow Rose Mine. Local rocks include schist of various types and ages, unit 7 (Klamath Mountains).

Workings include underground openings. The old workings are caved. Some newer development work was done in the late 1930's with unknown results. There is a 350 foot deep shaft with 3 levels and a 50 foot deep winze, from the lowest of these it is said to extend 150 feet N and S into ore.

Production data are found in: MacDonald (1912).

Production statistics for 1926: $200,000 worth of Au (period values) was produced by 1926. No other production record was found.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


9 valid minerals.

Detailed Mineral List:

Galena
Formula: PbS
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Gold
Formula: Au
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Heazlewoodite
Formula: Ni3S2
Description: Occurs as minute crystals in serpentine.
Reference: Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 64.
Hessite
Formula: Ag2Te
Reference: Hershey, Oscar H. (1899), The upper Coffee Creek mining district, California: Mining & Scientific Press: 79: 689; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 276; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 110.
Nagyágite
Formula: [Pb3(Pb,Sb)3S6](Au,Te)3
Reference: Hershey, Oscar H. (1899), The upper Coffee Creek mining district, California: Mining & Scientific Press: 79: 689; Osborne, H.Z. (1903), The Dorleska gold mine: Mining and Scientific Press: 7: 252; Stines, Norman S. (1907), The geology of the Coffee Creek mining district, California: Mining and Scientific Press: 95: 25-26; Palache, Charles, Harry Berman & Clifford Frondel (1944), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Volume I: 7th edition, revised and enlarged, 834pp.: 169.
Petzite
Formula: Ag3AuTe2
Reference: Osborne, H.Z. (1903), The Dorleska gold mine: Mining and Scientific Press: 7: 252; Stines, Norman S. (1907), The geology of the Coffee Creek mining district, California: Mining and Scientific Press: 95: 25-26; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 286; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 109.
Pyrite
Formula: FeS2
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Quartz
Formula: SiO2
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
'Serpentine Subgroup'
Formula: D3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
Reference: Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 64.
Sylvanite
Formula: (Au,Ag)2Te4
Reference: Stines, Norman S. (1907), The geology of the Coffee Creek mining district, California: Mining and Scientific Press: 95: 25-26; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 357; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 110.

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Gold1.AA.05Au
Group 2 - Sulphides and Sulfosalts
Galena2.CD.10PbS
Heazlewoodite2.BB.05Ni3S2
Hessite2.BA.60Ag2Te
Nagyágite2.HB.20a[Pb3(Pb,Sb)3S6](Au,Te)3
Petzite2.BA.75Ag3AuTe2
Pyrite2.EB.05aFeS2
Sylvanite2.EA.05(Au,Ag)2Te4
Group 4 - Oxides and Hydroxides
Quartz4.DA.05SiO2
Unclassified Minerals, Rocks, etc.
'Serpentine Subgroup'-D3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Metals, other than the Platinum Group
Gold1.1.1.1Au
Group 2 - SULFIDES
AmBnXp, with (m+n):p = 2:1
Hessite2.4.2.1Ag2Te
Petzite2.4.3.3Ag3AuTe2
AmBnXp, with (m+n):p = 3:2
Heazlewoodite2.5.3.1Ni3S2
AmXp, with m:p = 1:1
Galena2.8.1.1PbS
AmBnXp, with (m+n):p = 2:3
Nagyágite2.11.10.1[Pb3(Pb,Sb)3S6](Au,Te)3
AmBnXp, with (m+n):p = 1:2
Pyrite2.12.1.1FeS2
Sylvanite2.12.13.3(Au,Ag)2Te4
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Mixtures, etc.
'Serpentine Subgroup'-D3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn

List of minerals for each chemical element

HHydrogen
H Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
OOxygen
O QuartzSiO2
O Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
MgMagnesium
Mg Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
AlAluminium
Al Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
SiSilicon
Si QuartzSiO2
Si Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
SSulfur
S Nagyágite[Pb3(Pb,Sb)3S6](Au,Te)3
S PyriteFeS2
S GalenaPbS
S HeazlewooditeNi3S2
MnManganese
Mn Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
FeIron
Fe PyriteFeS2
Fe Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
NiNickel
Ni HeazlewooditeNi3S2
Ni Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
ZnZinc
Zn Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
AgSilver
Ag Sylvanite(Au,Ag)2Te4
Ag HessiteAg2Te
Ag PetziteAg3AuTe2
SbAntimony
Sb Nagyágite[Pb3(Pb,Sb)3S6](Au,Te)3
TeTellurium
Te Nagyágite[Pb3(Pb,Sb)3S6](Au,Te)3
Te Sylvanite(Au,Ag)2Te4
Te HessiteAg2Te
Te PetziteAg3AuTe2
AuGold
Au Nagyágite[Pb3(Pb,Sb)3S6](Au,Te)3
Au GoldAu
Au Sylvanite(Au,Ag)2Te4
Au PetziteAg3AuTe2
PbLead
Pb Nagyágite[Pb3(Pb,Sb)3S6](Au,Te)3
Pb GalenaPbS

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Hershey, Oscar H. (1899), The upper Coffee Creek mining district, California: Mining & Scientific Press: 79: 689.
Osborne, H.Z. (1903), The Dorleska gold mine: Mining and Scientific Press: 7: 252.
Stines, Norman S. (1907), The geology of the Coffee Creek mining district, California: Mining and Scientific Press: 95: 25-26.
MacDonald, Donald Francis (1913), Notes on the gold lodes of the Carrville district, Trinity County, California: USGS Bulletin 530D: 34.
Logan, Clarence August (1926), El Dorado, Shasta and Trinity Counties: California Journal of Mines and Geology, California Mining Bureau. (Report 22): 18.
Averill, Charles V. (1941), Mineral resources of Trinity and Humboldt Counties: California Journal of Mines and Geology, California Division Mines (Report 37): 37(1): 33.
Palache, Charles, Harry Berman & Clifford Frondel (1944), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Volume I: Elements, Sulfides, Sulfosalts, Oxides. John Wiley and Sons, Inc., New York. 7th edition, revised and enlarged, 834pp.: 169.
Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 276, 286, 357.
Hotz, Preston Enslow, Thurber, H.K., Marks, L.Y., and Evans, R.K. (1972), Mineral resources of the Salmon-Trinity Alps Primitive Area, California: U.S. Geological Survey Bulletin 1371-B, 267 p.: 128-130.
Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 64, 109, 110.
USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10086643 & 10263136.
U.S. Bureau of Mines, Minerals Availability System (MAS) file ID #0061050775.

Other Databases

USGS MRDS Record:10086643

Other Regions, Features and Areas containing this locality

North America
North America PlateTectonic Plate

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