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Jamestown Mine (Jamestown group), Jamestown, Jamestown District, Mother Lode Belt, Tuolumne Co., California, USAi
Regional Level Types
Jamestown Mine (Jamestown group)Mine
Jamestown- not defined -
Jamestown DistrictMining District
Mother Lode BeltBelt
Tuolumne Co.County
CaliforniaState
USACountry

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Latitude & Longitude (WGS84): 37° 57' North , 120° 25' West
Latitude & Longitude (decimal): 37.95000,-120.41667
GeoHash:G#: 9qdrgue6b
USGS MRDS Record:10072448
Locality type:Mine
Köppen climate type:Csa : Hot-summer Mediterranean climate
Nearest Settlements:
PlacePopulationDistance
Jamestown3,433 (2011)0.6km
Sonora4,818 (2017)4.8km
East Sonora2,266 (2011)5.7km
Tuttletown668 (2011)6.0km
Chinese Camp126 (2011)8.9km


A former underground Au-Ag mine complex located about 1 mile W of Jamestown, Aextending about 5 miles along the NW-SE-trending Mother Lode Belt. Discovered in 1850. Owned by the Sonora Mining Corp., Subsidiary of the Sonora Gold Corp. (70%), Canada (1986) and by the Pathfinder Gold Corp. (30.00%), Nevada (1986). Operations ceased in mid 1994. Reclamation was ongoing and was expected to continue through 1996. MRDS database stated accuracy for this location is 10,000 meters.

Mineralization is quartz vein deposit (Mineral occurrence model: Model code 273; USGS model code 36a; Deposit model name: Low-sulfide Au-quartz vein; Mark3 model number 27), hosted in Late Jurassic schist and serpentinite. Local alteration involves carbonitization. Regional geologic features include the Melones Fault Zone. Local rocks include undivided pre-Cenozoic metavolcanic rocks, unit 2 (undivided) and/or Jurassic marine rocks, unit 1 (Western Sierra Nevada and Western Klamath Mountains).

Workings include underground openings (see files for individual members of the group). Largest gold flotation mill in then USA.

Regions containing this locality

North America PlateTectonic Plate

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

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

39 valid minerals.

Detailed Mineral List:

Acanthite
Formula: Ag2S
Reference: Gunnar Färber specimens
Altaite
Formula: PbTe
Reference: Dana 7:I:206; Dana 6:1097; Genth F A (1868) Contributions to mineralogy - No. VII, The American Journal of Science and Arts, 95, 305-321; Hanks, Henry Garber (1884), Fourth report of the State Mineralogist: California Mining Bureau. Report 4, 410 pp. (includes catalog of minerals of California pp. 63-410), and miscellaneous observations on mineral products): 68; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 61; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 105.
Ankerite
Formula: Ca(Fe2+,Mg)(CO3)2
Reference: Native gold from the Jamestown Mine, Tuolumne County, California, Mineralogical Record, Jan 1994 by Nelson, Genne Myers, Leicht, Wayne
Calaverite
Formula: AuTe2
Reference: Dana 7:I:206; Dana 6:1097; Hanks, Henry Garber (1884), Fourth report of the State Mineralogist: California Mining Bureau. Report 4, 410 pp. (includes catalog of minerals of California pp. 63-410), and miscellaneous observations on mineral products): 104; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 116.
Calcite
Formula: CaCO3
Reference: Native gold from the Jamestown Mine, Tuolumne County, California, Mineralogical Record, Jan 1994 by Nelson, Genne Myers, Leicht, Wayne
Chalcopyrite
Formula: CuFeS2
Reference: Native gold from the Jamestown Mine, Tuolumne County, California, Mineralogical Record, Jan 1994 by Nelson, Genne Myers, Leicht, Wayne
Chenguodaite
Formula: Ag9Fe3+Te2S4
Reference: Gunnar Färber specimens.
'Chlorite Group'
Description: Occurs in schist.
Reference: USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10077946.
Chromite
Formula: Fe2+Cr3+2O4
Reference: Native gold from the Jamestown Mine, Tuolumne County, California, Mineralogical Record, Jan 1994 by Nelson, Genne Myers, Leicht, Wayne
Chrysotile
Formula: Mg3(Si2O5)(OH)4
Reference: Native gold from the Jamestown Mine, Tuolumne County, California, Mineralogical Record, Jan 1994 by Nelson, Genne Myers, Leicht, Wayne
Cobaltite
Formula: CoAsS
Reference: Native gold from the Jamestown Mine, Tuolumne County, California, Mineralogical Record, Jan 1994 by Nelson, Genne Myers, Leicht, Wayne
Coloradoite
Formula: HgTe
Reference: Native gold from the Jamestown Mine, Tuolumne County, California, Mineralogical Record, Jan 1994 by Nelson, Genne Myers, Leicht, Wayne
Dolomite
Formula: CaMg(CO3)2
Localities:
Fluorapatite
Formula: Ca5(PO4)3F
Reference: Native gold from the Jamestown Mine, Tuolumne County, California, Mineralogical Record, Jan 1994 by Nelson, Genne Myers, Leicht, Wayne
Galena
Formula: PbS
Reference: Native gold from the Jamestown Mine, Tuolumne County, California, Mineralogical Record, Jan 1994 by Nelson, Genne Myers, Leicht, Wayne
Gersdorffite
Formula: NiAsS
Reference: Native gold from the Jamestown Mine, Tuolumne County, California, Mineralogical Record, Jan 1994 by Nelson, Genne Myers, Leicht, Wayne
Gold
Formula: Au
Localities: Reported from at least 9 localities in this region.
Reference: Native gold from the Jamestown Mine, Tuolumne County, California, Mineralogical Record, Jan 1994 by Nelson, Genne Myers, Leicht, Wayne
Graphite
Formula: C
Reference: Native gold from the Jamestown Mine, Tuolumne County, California, Mineralogical Record, Jan 1994 by Nelson, Genne Myers, Leicht, Wayne
Hessite
Formula: Ag2Te
Reference: Native gold from the Jamestown Mine, Tuolumne County, California, Mineralogical Record, Jan 1994 by Nelson, Genne Myers, Leicht, Wayne
Ilmenite
Formula: Fe2+TiO3
Reference: Native gold from the Jamestown Mine, Tuolumne County, California, Mineralogical Record, Jan 1994 by Nelson, Genne Myers, Leicht, Wayne
Imiterite
Formula: Ag2HgS2
Reference: Mineralogical Record (1990): 21: 500.
Magnesite
Formula: MgCO3
Reference: Dana 7:I:206; Dana 6:1097.
Magnetite
Formula: Fe2+Fe3+2O4
Reference: Native gold from the Jamestown Mine, Tuolumne County, California, Mineralogical Record, Jan 1994 by Nelson, Genne Myers, Leicht, Wayne
'Mariposite'
Formula: K(Al,Cr)2(Al,Si)4O10(OH)2
Melonite
Formula: NiTe2
Reference: Native gold from the Jamestown Mine, Tuolumne County, California, Mineralogical Record, Jan 1994 by Nelson, Genne Myers, Leicht, Wayne
Millerite
Formula: NiS
Reference: Native gold from the Jamestown Mine, Tuolumne County, California, Mineralogical Record, Jan 1994 by Nelson, Genne Myers, Leicht, Wayne
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Reference: Native gold from the Jamestown Mine, Tuolumne County, California, Mineralogical Record, Jan 1994 by Nelson, Genne Myers, Leicht, Wayne
Muscovite var: Sericite
Formula: KAl2(AlSi3O10)(OH)2
Description: Occurs in schist.
Reference: USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10077946.
Petzite
Formula: Ag3AuTe2
Reference: Native gold from the Jamestown Mine, Tuolumne County, California, Mineralogical Record, Jan 1994 by Nelson, Genne Myers, Leicht, Wayne
'Phengite'
Formula: KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
Pyrite
Formula: FeS2
Reference: Native gold from the Jamestown Mine, Tuolumne County, California, Mineralogical Record, Jan 1994 by Nelson, Genne Myers, Leicht, Wayne
Quartz
Formula: SiO2
Localities:
Reference: Native gold from the Jamestown Mine, Tuolumne County, California, Mineralogical Record, Jan 1994 by Nelson, Genne Myers, Leicht, Wayne
Rutile
Formula: TiO2
Reference: Native gold from the Jamestown Mine, Tuolumne County, California, Mineralogical Record, Jan 1994 by Nelson, Genne Myers, Leicht, Wayne
Siderite
Formula: FeCO3
Reference: Native gold from the Jamestown Mine, Tuolumne County, California, Mineralogical Record, Jan 1994 by Nelson, Genne Myers, Leicht, Wayne
Siegenite
Formula: CoNi2S4
Reference: Native gold from the Jamestown Mine, Tuolumne County, California, Mineralogical Record, Jan 1994 by Nelson, Genne Myers, Leicht, Wayne
Sphalerite
Formula: ZnS
Reference: Native gold from the Jamestown Mine, Tuolumne County, California, Mineralogical Record, Jan 1994 by Nelson, Genne Myers, Leicht, Wayne
Sylvanite
Formula: (Au,Ag)2Te4
Reference: Silliman, Benjamin, Jr. (1868a), Note on three new localities of tellurium minerals in California and on some mineralogical features of the mother vein: California Academy of Natural Sciences Proceedings: 3: 378; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 357.
Talc
Formula: Mg3Si4O10(OH)2
Reference: Native gold from the Jamestown Mine, Tuolumne County, California, Mineralogical Record, Jan 1994 by Nelson, Genne Myers, Leicht, Wayne
Tellurium
Formula: Te
Reference: Native gold from the Jamestown Mine, Tuolumne County, California, Mineralogical Record, Jan 1994 by Nelson, Genne Myers, Leicht, Wayne
Tennantite
Formula: Cu6[Cu4(Fe,Zn)2]As4S13
Reference: Ransome, Frederick Leslie (1900), Description of the Mother Lode district, California: USGS Geol. Atlas, Mother Lode (No. 63), 11 pp.: 9; Logan, Clarence August (1934), Mother Lode Gold Belt of California: California Division Mines Bulletin 108, 221 pp.: 36, 171-178; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 364; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 35 (map 2-21), 135.
Tetradymite
Formula: Bi2Te2S
Tetrahedrite
Formula: Cu6[Cu4(Fe,Zn)2]Sb4S13
Reference: Native gold from the Jamestown Mine, Tuolumne County, California, Mineralogical Record, Jan 1994 by Nelson, Genne Myers, Leicht, Wayne
Titanite
Formula: CaTi(SiO4)O
Reference: Native gold from the Jamestown Mine, Tuolumne County, California, Mineralogical Record, Jan 1994 by Nelson, Genne Myers, Leicht, Wayne

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Gold1.AA.05Au
Graphite1.CB.05aC
Tellurium1.CC.10Te
Group 2 - Sulphides and Sulfosalts
Acanthite2.BA.35Ag2S
Altaite2.CD.10PbTe
Calaverite2.EA.10AuTe2
Chalcopyrite2.CB.10aCuFeS2
Chenguodaite2.BA.60Ag9Fe3+Te2S4
Cobaltite2.EB.25CoAsS
Coloradoite2.CB.05aHgTe
Galena2.CD.10PbS
Gersdorffite2.EB.25NiAsS
Hessite2.BA.60Ag2Te
Imiterite2.BD.05Ag2HgS2
Melonite2.EA.20NiTe2
Millerite2.CC.20NiS
Petzite2.BA.75Ag3AuTe2
Pyrite2.EB.05aFeS2
Siegenite2.DA.05CoNi2S4
Sphalerite2.CB.05aZnS
Sylvanite2.EA.05(Au,Ag)2Te4
Tennantite2.GB.05Cu6[Cu4(Fe,Zn)2]As4S13
Tetradymite2.DC.05Bi2Te2S
Tetrahedrite2.GB.05Cu6[Cu4(Fe,Zn)2]Sb4S13
Group 4 - Oxides and Hydroxides
Chromite4.BB.05Fe2+Cr3+2O4
Ilmenite4.CB.05Fe2+TiO3
Magnetite4.BB.05Fe2+Fe3+2O4
Quartz4.DA.05SiO2
Rutile4.DB.05TiO2
Group 5 - Nitrates and Carbonates
Ankerite5.AB.10Ca(Fe2+,Mg)(CO3)2
Calcite5.AB.05CaCO3
Dolomite5.AB.10CaMg(CO3)2
Magnesite5.AB.05MgCO3
Siderite5.AB.05FeCO3
Group 8 - Phosphates, Arsenates and Vanadates
Fluorapatite8.BN.05Ca5(PO4)3F
Group 9 - Silicates
Chrysotile9.ED.15Mg3(Si2O5)(OH)4
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
var: Sericite9.EC.15KAl2(AlSi3O10)(OH)2
Talc9.EC.05Mg3Si4O10(OH)2
Titanite9.AG.15CaTi(SiO4)O
Unclassified Minerals, Rocks, etc.
'Chlorite Group'-
'Mariposite'-K(Al,Cr)2(Al,Si)4O10(OH)2
'Phengite'-KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2

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
Semi-metals and non-metals
Graphite1.3.6.2C
Tellurium1.3.4.2Te
Group 2 - SULFIDES
AmBnXp, with (m+n):p = 2:1
Acanthite2.4.1.1Ag2S
Hessite2.4.2.1Ag2Te
Petzite2.4.3.3Ag3AuTe2
AmBnXp, with (m+n):p = 3:2
Imiterite2.5.8.1Ag2HgS2
AmXp, with m:p = 1:1
Altaite2.8.1.3PbTe
Coloradoite2.8.2.5HgTe
Galena2.8.1.1PbS
Millerite2.8.16.1NiS
Sphalerite2.8.2.1ZnS
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 3:4
Siegenite2.10.1.6CoNi2S4
AmBnXp, with (m+n):p = 2:3
Tetradymite2.11.7.1Bi2Te2S
AmBnXp, with (m+n):p = 1:2
Calaverite2.12.13.2AuTe2
Cobaltite2.12.3.1CoAsS
Gersdorffite2.12.3.2NiAsS
Melonite2.12.14.1NiTe2
Pyrite2.12.1.1FeS2
Sylvanite2.12.13.3(Au,Ag)2Te4
Miscellaneous
Chenguodaite2.16.28. Ag9Fe3+Te2S4
Group 3 - SULFOSALTS
3 <ø < 4
Tennantite3.3.6.2Cu6[Cu4(Fe,Zn)2]As4S13
Tetrahedrite3.3.6.1Cu6[Cu4(Fe,Zn)2]Sb4S13
Group 4 - SIMPLE OXIDES
A2X3
Ilmenite4.3.5.1Fe2+TiO3
AX2
Rutile4.4.1.1TiO2
Group 7 - MULTIPLE OXIDES
AB2X4
Chromite7.2.3.3Fe2+Cr3+2O4
Magnetite7.2.2.3Fe2+Fe3+2O4
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Magnesite14.1.1.2MgCO3
Siderite14.1.1.3FeCO3
AB(XO3)2
Ankerite14.2.1.2Ca(Fe2+,Mg)(CO3)2
Dolomite14.2.1.1CaMg(CO3)2
Group 41 - ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
A5(XO4)3Zq
Fluorapatite41.8.1.1Ca5(PO4)3F
Group 52 - NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] and/or >[6] coordination
Titanite52.4.3.1CaTi(SiO4)O
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 1:1 layers
Chrysotile71.1.5.1Mg3(Si2O5)(OH)4
Sheets of 6-membered rings with 2:1 layers
Muscovite71.2.2a.1KAl2(AlSi3O10)(OH)2
Talc71.2.1.3Mg3Si4O10(OH)2
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Mixtures, etc.
'Chlorite Group'-
'Mariposite'-K(Al,Cr)2(Al,Si)4O10(OH)2
Muscovite
var: Sericite
-KAl2(AlSi3O10)(OH)2
'Phengite'-KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2

List of minerals for each chemical element

HHydrogen
H ChrysotileMg3(Si2O5)(OH)4
H MuscoviteKAl2(AlSi3O10)(OH)2
H TalcMg3Si4O10(OH)2
H MaripositeK(Al,Cr)2(Al,Si)4O10(OH)2
H Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
H PhengiteKAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
CCarbon
C AnkeriteCa(Fe2+,Mg)(CO3)2
C CalciteCaCO3
C GraphiteC
C SideriteFeCO3
C MagnesiteMgCO3
C DolomiteCaMg(CO3)2
OOxygen
O AnkeriteCa(Fe2+,Mg)(CO3)2
O CalciteCaCO3
O ChrysotileMg3(Si2O5)(OH)4
O ChromiteFe2+Cr23+O4
O FluorapatiteCa5(PO4)3F
O IlmeniteFe2+TiO3
O MagnetiteFe2+Fe23+O4
O MuscoviteKAl2(AlSi3O10)(OH)2
O QuartzSiO2
O RutileTiO2
O SideriteFeCO3
O TalcMg3Si4O10(OH)2
O TitaniteCaTi(SiO4)O
O MagnesiteMgCO3
O MaripositeK(Al,Cr)2(Al,Si)4O10(OH)2
O DolomiteCaMg(CO3)2
O Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
O PhengiteKAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
FFluorine
F FluorapatiteCa5(PO4)3F
MgMagnesium
Mg AnkeriteCa(Fe2+,Mg)(CO3)2
Mg ChrysotileMg3(Si2O5)(OH)4
Mg TalcMg3Si4O10(OH)2
Mg MagnesiteMgCO3
Mg DolomiteCaMg(CO3)2
Mg PhengiteKAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
AlAluminium
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al MaripositeK(Al,Cr)2(Al,Si)4O10(OH)2
Al Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
Al PhengiteKAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
SiSilicon
Si ChrysotileMg3(Si2O5)(OH)4
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si QuartzSiO2
Si TalcMg3Si4O10(OH)2
Si TitaniteCaTi(SiO4)O
Si MaripositeK(Al,Cr)2(Al,Si)4O10(OH)2
Si Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
Si PhengiteKAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
PPhosphorus
P FluorapatiteCa5(PO4)3F
SSulfur
S ChalcopyriteCuFeS2
S CobaltiteCoAsS
S GalenaPbS
S GersdorffiteNiAsS
S ImiteriteAg2HgS2
S MilleriteNiS
S PyriteFeS2
S SiegeniteCoNi2S4
S SphaleriteZnS
S TetrahedriteCu6[Cu4(Fe,Zn)2]Sb4S13
S TetradymiteBi2Te2S
S TennantiteCu6[Cu4(Fe,Zn)2]As4S13
S AcanthiteAg2S
S ChenguodaiteAg9Fe3+Te2S4
KPotassium
K MuscoviteKAl2(AlSi3O10)(OH)2
K MaripositeK(Al,Cr)2(Al,Si)4O10(OH)2
K Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
K PhengiteKAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
CaCalcium
Ca AnkeriteCa(Fe2+,Mg)(CO3)2
Ca CalciteCaCO3
Ca FluorapatiteCa5(PO4)3F
Ca TitaniteCaTi(SiO4)O
Ca DolomiteCaMg(CO3)2
TiTitanium
Ti IlmeniteFe2+TiO3
Ti RutileTiO2
Ti TitaniteCaTi(SiO4)O
CrChromium
Cr ChromiteFe2+Cr23+O4
Cr MaripositeK(Al,Cr)2(Al,Si)4O10(OH)2
FeIron
Fe AnkeriteCa(Fe2+,Mg)(CO3)2
Fe ChalcopyriteCuFeS2
Fe ChromiteFe2+Cr23+O4
Fe IlmeniteFe2+TiO3
Fe MagnetiteFe2+Fe23+O4
Fe PyriteFeS2
Fe SideriteFeCO3
Fe TetrahedriteCu6[Cu4(Fe,Zn)2]Sb4S13
Fe ChenguodaiteAg9Fe3+Te2S4
Fe PhengiteKAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
CoCobalt
Co CobaltiteCoAsS
Co SiegeniteCoNi2S4
NiNickel
Ni GersdorffiteNiAsS
Ni MeloniteNiTe2
Ni MilleriteNiS
Ni SiegeniteCoNi2S4
CuCopper
Cu ChalcopyriteCuFeS2
Cu TetrahedriteCu6[Cu4(Fe,Zn)2]Sb4S13
Cu TennantiteCu6[Cu4(Fe,Zn)2]As4S13
ZnZinc
Zn SphaleriteZnS
Zn TetrahedriteCu6[Cu4(Fe,Zn)2]Sb4S13
AsArsenic
As CobaltiteCoAsS
As GersdorffiteNiAsS
As TennantiteCu6[Cu4(Fe,Zn)2]As4S13
AgSilver
Ag HessiteAg2Te
Ag ImiteriteAg2HgS2
Ag PetziteAg3AuTe2
Ag Sylvanite(Au,Ag)2Te4
Ag AcanthiteAg2S
Ag ChenguodaiteAg9Fe3+Te2S4
SbAntimony
Sb TetrahedriteCu6[Cu4(Fe,Zn)2]Sb4S13
TeTellurium
Te ColoradoiteHgTe
Te HessiteAg2Te
Te MeloniteNiTe2
Te PetziteAg3AuTe2
Te TelluriumTe
Te AltaitePbTe
Te CalaveriteAuTe2
Te TetradymiteBi2Te2S
Te Sylvanite(Au,Ag)2Te4
Te ChenguodaiteAg9Fe3+Te2S4
AuGold
Au GoldAu
Au PetziteAg3AuTe2
Au CalaveriteAuTe2
Au Sylvanite(Au,Ag)2Te4
HgMercury
Hg ColoradoiteHgTe
Hg ImiteriteAg2HgS2
PbLead
Pb GalenaPbS
Pb AltaitePbTe
BiBismuth
Bi TetradymiteBi2Te2S

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Mesozoic - Paleozoic
66 - 541 Ma



ID: 2945485
Undivided pre-Cenozoic metavolcanic rocks, unit 2 (undivided)

Age: Phanerozoic (66 - 541 Ma)

Stratigraphic Name: Hodge Volcanic Series; Franklin Canyon Formation; Slate Creek Complex

Description: Undivided pre-Cenozoic metavolcanic rocks. Includes latite, dacite, tuff, and greenstone; commonly schistose.

Comments: Klamath Mountains, Sierra Nevada, Mojave Desert, and other areas. Miscellaneous volcanic and metavolcanic rocks, probably mostly Jurassic in age Original map source: Saucedo, G.J., Bedford, D.R., Raines, G.L., Miller, R.J., and Wentworth, C.M., 2000, GIS Data for the Geologic Map of California, California Department of Conservation, Division of Mines and Geology, CD-ROM 2000-07, scale 1:750,000.

Lithology: Major:{mafic volcanic,greenstone}, Minor:{felsic volcanic}, Incidental:{amphibolite, gabbro}

Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052. [133]

Devonian - Silurian
358.9 - 443.8 Ma



ID: 3185269
Paleozoic sedimentary and volcanic rocks

Age: Paleozoic (358.9 - 443.8 Ma)

Comments: Mccloud Arc

Lithology: Mudstone-carbonate-sandstone-conglomerate

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License

References

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Julihn, C.E. and F.W. Horton (1940), Mines of the Southern Mother Lode Region, Part II - Tuolumne and Mariposa Counties; in: Mineral Industried Survey of the United States, California. U.S. Bureau of Mines, Bulletin 424, 179 pp.
Skillings' Mining Review staff (1984), Sonora Gold Corp.'s Project for October, 1984 - Start up in Mother Lode: 73(20)(May 19th): 2-4.
Allgood, G. M., Lovejoy, M. E., and Allgood, R. W. (1985), Jamestown Gold Mine, Tuolumne County, California, Sonora Mining Corporation, 6 pp.
Argall, George O., Jr. (1987), Sonora Gold Makes Flotation Concentrates at Jamestown, Engineering and Mining Journal (December): 38-39.
Bliss, James D., and Jones, Gail M. (1988), Mineralogic and Grade-Tonnage Information on Low-Sulfide Au-Quartz Veins, USGS Open-File Report 88-229, 99 p.
Mining Magazine (1988) (January): 50 (Jamestown Mine).
Nelson, Genne Myers and Leicht, Wayne (1994), Native gold from the Jamestown Mine, Tuolumne County, California, Mineralogical Record (January).
USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10072448 & 10238351.
U.S. Bureau of Mines, Minerals Availability System (MAS) file ID #0061090892.

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