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Darwin Mines (Darwin group; Defiance; Driver; Independence; Lane; Liberty; Lucky Jim; Southwest and Thompson; Bernon; Rip Van Winkle; Mexicanus Colorado Inc.), Darwin, Darwin District, Darwin Hills, Inyo Co., California, USAi
Regional Level Types
Darwin Mines (Darwin group; Defiance; Driver; Independence; Lane; Liberty; Lucky Jim; Southwest and Thompson; Bernon; Rip Van Winkle; Mexicanus Colorado Inc.)Group of Mines
Darwin- not defined -
Darwin DistrictMining District
Darwin HillsGroup of Hills
Inyo Co.County
CaliforniaState
USACountry

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Key
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Latitude & Longitude (WGS84):
36° 16' 49'' North , 117° 35' 59'' West
Latitude & Longitude (decimal):
Locality type:
Group of Mines
Nearest Settlements:
PlacePopulationDistance
Olancha192 (2015)36.6km


A group of former Pb-Zn-Ag-W-Cu-Au mines.

NOTE: This group of mines was leased by the firm Mexicanus Colorado Inc. during the early 1970's. The name is mis-spelled in the MRDS database and appears as "Mexicanus Colovgdo Inc A" under MRDS file #10188132, referencing the USGS Minerals Yearbook 1972: 26, 30.

The Company „Project Darwin LLC“ acquired the Darwin Mines and 58 patented mining claims in 1996. They have prepared a good description of these mines and their history and put it on a webpage (see under Links).

Mineralization is a polymetallic replacement deposit (Deposit Model: 72: Polymetallic replacement) hosted in rocks of the Portachuelo Formation (limestone, granodiorite).

Local structures include a thrust fault, igneous intrusions, faults, and folds.

Regions containing this locality

North America PlateTectonic Plate

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


15 valid minerals.

Detailed Mineral List:

Andradite
Formula: Ca3Fe3+2(SiO4)3
Reference: Knopf, Adolf (1914a), The Darwin silver-lead mining district, California: USGS Bulletin 580: 1-18
Calcite
Formula: CaCO3
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; WARING, C. A., 1915 , INYO COUNTY; 15TH REPT. STATE MINERALOGIST; CALIF. MIN. BUR., P. 95
Cerussite
Formula: PbCO3
Reference: WARING, C. A., 1915 , INYO COUNTY; 15TH REPT. STATE MINERALOGIST; CALIF. MIN. BUR., P. 95
Chalcopyrite
Formula: CuFeS2
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Chrysocolla
Formula: Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Reference: WARING, C. A., 1915 , INYO COUNTY; 15TH REPT. STATE MINERALOGIST; CALIF. MIN. BUR., P. 95
'Clays'
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Fluorite
Formula: CaF2
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; WARING, C. A., 1915 , INYO COUNTY; 15TH REPT. STATE MINERALOGIST; CALIF. MIN. BUR., P. 95
Franckeite
Formula: Fe2+(Pb,Sn2+)6Sn4+2Sb2S14
Reference: Handbook of Mineralogy
Galena
Formula: PbS
Reference: WARING, C. A., 1915 , INYO COUNTY; 15TH REPT. STATE MINERALOGIST; CALIF. MIN. BUR., P. 95
Guanajuatite
Formula: Bi2Se3
Reference: Handbook of Mineralogy
Gypsum
Formula: CaSO4 · 2H2O
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Jarosite
Formula: KFe3+ 3(SO4)2(OH)6
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
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.
Quartz var: Jasper
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Sphalerite
Formula: ZnS
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Tetrahedrite
Formula: Cu6Cu4(Fe2+,Zn)2Sb4S12S
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Chalcopyrite2.CB.10aCuFeS2
Franckeite2.HF.25bFe2+(Pb,Sn2+)6Sn4+2Sb2S14
Galena2.CD.10PbS
Guanajuatite2.DB.05Bi2Se3
Pyrite2.EB.05aFeS2
Sphalerite2.CB.05aZnS
Tetrahedrite2.GB.05Cu6Cu4(Fe2+,Zn)2Sb4S12S
Group 3 - Halides
Fluorite3.AB.25CaF2
Group 4 - Oxides and Hydroxides
Quartz4.DA.05SiO2
var: Jasper4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Cerussite5.AB.15PbCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Gypsum7.CD.40CaSO4 · 2H2O
Jarosite7.BC.10KFe3+ 3(SO4)2(OH)6
Group 9 - Silicates
Andradite9.AD.25Ca3Fe3+2(SiO4)3
Chrysocolla9.ED.20Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Unclassified Minerals, Rocks, etc.
'Clays'-

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmXp, with m:p = 1:1
Galena2.8.1.1PbS
Sphalerite2.8.2.1ZnS
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 2:3
Guanajuatite2.11.2.4Bi2Se3
AmBnXp, with (m+n):p = 1:2
Pyrite2.12.1.1FeS2
Group 3 - SULFOSALTS
ø > 4
Franckeite3.1.4.2Fe2+(Pb,Sn2+)6Sn4+2Sb2S14
3 <ø < 4
Tetrahedrite3.3.6.1Cu6Cu4(Fe2+,Zn)2Sb4S12S
Group 9 - NORMAL HALIDES
AX2
Fluorite9.2.1.1CaF2
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Cerussite14.1.3.4PbCO3
Group 29 - HYDRATED ACID AND NORMAL SULFATES
AXO4·xH2O
Gypsum29.6.3.1CaSO4 · 2H2O
Group 30 - ANHYDROUS SULFATES CONTAINING HYDROXYL OR HALOGEN
(AB)2(XO4)Zq
Jarosite30.2.5.1KFe3+ 3(SO4)2(OH)6
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in [6] and >[6] coordination
Andradite51.4.3b.1Ca3Fe3+2(SiO4)3
Group 74 - PHYLLOSILICATES Modulated Layers
Modulated Layers with joined strips
Chrysocolla74.3.2.1Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Mixtures, etc.
'Clays'-
Quartz
var: Jasper
-SiO2

List of minerals for each chemical element

HHydrogen
H JarositeKFe3+ 3(SO4)2(OH)6
H GypsumCaSO4 · 2H2O
H ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
CCarbon
C CalciteCaCO3
C CerussitePbCO3
OOxygen
O QuartzSiO2
O CalciteCaCO3
O JarositeKFe3+ 3(SO4)2(OH)6
O GypsumCaSO4 · 2H2O
O ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
O CerussitePbCO3
O AndraditeCa3Fe23+(SiO4)3
FFluorine
F FluoriteCaF2
AlAluminium
Al ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
SiSilicon
Si QuartzSiO2
Si ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Si AndraditeCa3Fe23+(SiO4)3
SSulfur
S SphaleriteZnS
S PyriteFeS2
S TetrahedriteCu6Cu4(Fe2+,Zn)2Sb4S12S
S ChalcopyriteCuFeS2
S JarositeKFe3+ 3(SO4)2(OH)6
S GypsumCaSO4 · 2H2O
S FranckeiteFe2+(Pb,Sn2+)6Sn24+Sb2S14
S GalenaPbS
KPotassium
K JarositeKFe3+ 3(SO4)2(OH)6
CaCalcium
Ca FluoriteCaF2
Ca CalciteCaCO3
Ca GypsumCaSO4 · 2H2O
Ca AndraditeCa3Fe23+(SiO4)3
FeIron
Fe PyriteFeS2
Fe TetrahedriteCu6Cu4(Fe2+,Zn)2Sb4S12S
Fe ChalcopyriteCuFeS2
Fe JarositeKFe3+ 3(SO4)2(OH)6
Fe FranckeiteFe2+(Pb,Sn2+)6Sn24+Sb2S14
Fe AndraditeCa3Fe23+(SiO4)3
CuCopper
Cu TetrahedriteCu6Cu4(Fe2+,Zn)2Sb4S12S
Cu ChalcopyriteCuFeS2
Cu ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
ZnZinc
Zn SphaleriteZnS
Zn TetrahedriteCu6Cu4(Fe2+,Zn)2Sb4S12S
SeSelenium
Se GuanajuatiteBi2Se3
SnTin
Sn FranckeiteFe2+(Pb,Sn2+)6Sn24+Sb2S14
SbAntimony
Sb TetrahedriteCu6Cu4(Fe2+,Zn)2Sb4S12S
Sb FranckeiteFe2+(Pb,Sn2+)6Sn24+Sb2S14
PbLead
Pb FranckeiteFe2+(Pb,Sn2+)6Sn24+Sb2S14
Pb CerussitePbCO3
Pb GalenaPbS
BiBismuth
Bi GuanajuatiteBi2Se3

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

Holocene - Pliocene
0 - 5.333 Ma



ID: 2751347
Quaternary alluvium and marine deposits

Age: Cenozoic (0 - 5.333 Ma)

Stratigraphic Name: Temescal Formation; Modesto Formation; Victor Formation; Alameda Formation; Aromas Red Sands; Bautista Beds; Brawley Formation; Borrego Formation; Burnt Canyon Breccia; Cabezon Fanglomerate; Campus Formation; Casitas Formation; Chemehuevi Formation; Corcoran Clay; Cushenbury Springs Formation; Dos Picachos Gravels; Dripping Springs Formation; Frazier Mountain Formation; Friant Formation; Harold Formation; Heights Fanglomerate; Hookton Formation; Huichica Formation; La Habra Formation; Manix Lake Beds; Mohawk Lake Beds; Montezuma Formation; Nadeau Gravel; Ocotillo Conglomerate; Orcutt Formation; Pacoima Formation; Pauba Formation; Peckham Formation; Pinto Formation; Resting Springs Formation; Riverbank Formation; Rohnerville Formation; San Dimas Formation; Shoemaker Gravel; Temecula Arkose; Battery Formation; Bay Point Formation; Colma Formation; Lindavista Formation; Lomita Marl; Merritt Sand; Millerton Formation; Palos Verdes Sand; San Pedro Formation; Sweitzer Formation; Timms Point Silt

Description: Alluvium, lake, playa, and terrace deposits; unconsolidated and semi-consolidated. Mostly nonmarine, but includes marine deposits near the coast.

Comments: 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:{coarse alluvium}, Minor:{fine alluvium}

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]

Quaternary - Miocene
0 - 23.03 Ma



ID: 3185380
Cenozoic sedimentary rocks

Age: Cenozoic (0 - 23.03 Ma)

Lithology: Sedimentary rocks

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

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Butner, D.W. (1949), Investigation of tungsten occurrences in Darwin district, Inyo County, California: US Bureau Mines Report of Investigation 4475: 5.
Norman, L.A. & Richard M. Stewart (1951), Mines and mineral resources of Inyo County, California: California Journal of Mines and Geology: 47(1): 59-68.
Goodwin, Joseph Grant (1957) Lead and zinc in California. California Journal of Mines and Geology, Division of Mines: 53(3&4): 466.
Hall, Wayne Everett & E.M. Mackevett (1958), Economic geology of the Darwin quadrangle, Inyo County, California: Calif Division of Mines Special Report 51, 77 pp.: 25-30, 37-40.
U.S. Bureau of Mines Minerals Yearbook (1972): 26, 30.
USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10188132.
Mineral Availability System (MAS) file #0060270687 (Darwin District Tungsten).

USGS MRDS Record:10188132

External Links

http://www.projectdarwin.net/ (Status and History of Darwin Mines)


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