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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, USA i
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 District Mining District
Darwin Hills Group of Hills
Inyo Co. County
California State
USA Country

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 District	Mining District
Darwin Hills	Group of Hills
Inyo Co.	County
California	State
USA	Country

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Scheelite

Darwin Mines, Darwin, Darwin District, Darwin Hills, Inyo Co., California, USA

Latitude & Longitude (WGS84):

36° 16' 49'' North , 117° 35' 59'' West

Latitude & Longitude (decimal):

36.28028,-117.59972

GeoHash:

G#: 9qkq7uw7z

Locality type:

Group of Mines

Köppen climate type:

BSk : Cold semi-arid (steppe) climate

Nearest Settlements:

Place	Population	Distance
Olancha	192 (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 Plate

Tectonic 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: Cu_2-xAl_x(H_2-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

ⓘ 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
ⓘ	Chalcopyrite	2.CB.10a	CuFeS₂
ⓘ	Franckeite	2.HF.25b	Fe²⁺(Pb,Sn²⁺)₆Sn⁴⁺₂Sb₂S₁₄
ⓘ	Galena	2.CD.10	PbS
ⓘ	Guanajuatite	2.DB.05	Bi₂Se₃
ⓘ	Pyrite	2.EB.05a	FeS₂
ⓘ	Sphalerite	2.CB.05a	ZnS
ⓘ	Tetrahedrite	2.GB.05	Cu₆Cu₄(Fe²⁺,Zn)₂Sb₄S₁₂S
Group 3 - Halides
ⓘ	Fluorite	3.AB.25	CaF₂
Group 4 - Oxides and Hydroxides
ⓘ	Quartz	4.DA.05	SiO₂
ⓘ	var: Jasper	4.DA.05	SiO₂
Group 5 - Nitrates and Carbonates
ⓘ	Calcite	5.AB.05	CaCO₃
ⓘ	Cerussite	5.AB.15	PbCO₃
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
ⓘ	Gypsum	7.CD.40	CaSO₄ · 2H₂O
ⓘ	Jarosite	7.BC.10	KFe³⁺ ₃(SO₄)₂(OH)₆
Group 9 - Silicates
ⓘ	Andradite	9.AD.25	Ca₃Fe³⁺₂(SiO₄)₃
ⓘ	Chrysocolla	9.ED.20	Cu_2-xAl_x(H_2-xSi₂O₅)(OH)₄ · nH₂O
Unclassified Minerals, Rocks, etc.
ⓘ	'Clays'	-

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
A_mX_p, with m:p = 1:1
ⓘ	Galena	2.8.1.1	PbS
ⓘ	Sphalerite	2.8.2.1	ZnS
A_mB_nX_p, with (m+n):p = 1:1
ⓘ	Chalcopyrite	2.9.1.1	CuFeS₂
A_mB_nX_p, with (m+n):p = 2:3
ⓘ	Guanajuatite	2.11.2.4	Bi₂Se₃
A_mB_nX_p, with (m+n):p = 1:2
ⓘ	Pyrite	2.12.1.1	FeS₂
Group 3 - SULFOSALTS
ø > 4
ⓘ	Franckeite	3.1.4.2	Fe²⁺(Pb,Sn²⁺)₆Sn⁴⁺₂Sb₂S₁₄
3 <ø < 4
ⓘ	Tetrahedrite	3.3.6.1	Cu₆Cu₄(Fe²⁺,Zn)₂Sb₄S₁₂S
Group 9 - NORMAL HALIDES
AX₂
ⓘ	Fluorite	9.2.1.1	CaF₂
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO₃)
ⓘ	Calcite	14.1.1.1	CaCO₃
ⓘ	Cerussite	14.1.3.4	PbCO₃
Group 29 - HYDRATED ACID AND NORMAL SULFATES
AXO₄·xH₂O
ⓘ	Gypsum	29.6.3.1	CaSO₄ · 2H₂O
Group 30 - ANHYDROUS SULFATES CONTAINING HYDROXYL OR HALOGEN
(AB)₂(XO₄)Z_q
ⓘ	Jarosite	30.2.5.1	KFe³⁺ ₃(SO₄)₂(OH)₆
Group 51 - NESOSILICATES Insular SiO₄ Groups Only
Insular SiO₄ Groups Only with cations in [6] and >[6] coordination
ⓘ	Andradite	51.4.3b.1	Ca₃Fe³⁺₂(SiO₄)₃
Group 74 - PHYLLOSILICATES Modulated Layers
Modulated Layers with joined strips
ⓘ	Chrysocolla	74.3.2.1	Cu_2-xAl_x(H_2-xSi₂O₅)(OH)₄ · nH₂O
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO₂ with [4] coordinated Si
ⓘ	Quartz	75.1.3.1	SiO₂
Unclassified Minerals, Mixtures, etc.
ⓘ	'Clays'	-
ⓘ	Quartz var: Jasper	-	SiO₂

List of minerals for each chemical element

H	Hydrogen
H	ⓘ Jarosite	KFe³⁺ ₃(SO₄)₂(OH)₆
H	ⓘ Gypsum	CaSO₄ · 2H₂O
H	ⓘ Chrysocolla	Cu_2-xAl_x(H_2-xSi₂O₅)(OH)₄ · nH₂O
C	Carbon
C	ⓘ Calcite	CaCO₃
C	ⓘ Cerussite	PbCO₃
O	Oxygen
O	ⓘ Quartz	SiO₂
O	ⓘ Calcite	CaCO₃
O	ⓘ Jarosite	KFe³⁺ ₃(SO₄)₂(OH)₆
O	ⓘ Gypsum	CaSO₄ · 2H₂O
O	ⓘ Chrysocolla	Cu_2-xAl_x(H_2-xSi₂O₅)(OH)₄ · nH₂O
O	ⓘ Cerussite	PbCO₃
O	ⓘ Andradite	Ca₃Fe₂³⁺(SiO₄)₃
F	Fluorine
F	ⓘ Fluorite	CaF₂
Al	Aluminium
Al	ⓘ Chrysocolla	Cu_2-xAl_x(H_2-xSi₂O₅)(OH)₄ · nH₂O
Si	Silicon
Si	ⓘ Quartz	SiO₂
Si	ⓘ Chrysocolla	Cu_2-xAl_x(H_2-xSi₂O₅)(OH)₄ · nH₂O
Si	ⓘ Andradite	Ca₃Fe₂³⁺(SiO₄)₃
S	Sulfur
S	ⓘ Sphalerite	ZnS
S	ⓘ Pyrite	FeS₂
S	ⓘ Tetrahedrite	Cu₆Cu₄(Fe²⁺,Zn)₂Sb₄S₁₂S
S	ⓘ Chalcopyrite	CuFeS₂
S	ⓘ Jarosite	KFe³⁺ ₃(SO₄)₂(OH)₆
S	ⓘ Gypsum	CaSO₄ · 2H₂O
S	ⓘ Franckeite	Fe²⁺(Pb,Sn²⁺)₆Sn₂⁴⁺Sb₂S₁₄
S	ⓘ Galena	PbS
K	Potassium
K	ⓘ Jarosite	KFe³⁺ ₃(SO₄)₂(OH)₆
Ca	Calcium
Ca	ⓘ Fluorite	CaF₂
Ca	ⓘ Calcite	CaCO₃
Ca	ⓘ Gypsum	CaSO₄ · 2H₂O
Ca	ⓘ Andradite	Ca₃Fe₂³⁺(SiO₄)₃
Fe	Iron
Fe	ⓘ Pyrite	FeS₂
Fe	ⓘ Tetrahedrite	Cu₆Cu₄(Fe²⁺,Zn)₂Sb₄S₁₂S
Fe	ⓘ Chalcopyrite	CuFeS₂
Fe	ⓘ Jarosite	KFe³⁺ ₃(SO₄)₂(OH)₆
Fe	ⓘ Franckeite	Fe²⁺(Pb,Sn²⁺)₆Sn₂⁴⁺Sb₂S₁₄
Fe	ⓘ Andradite	Ca₃Fe₂³⁺(SiO₄)₃
Cu	Copper
Cu	ⓘ Tetrahedrite	Cu₆Cu₄(Fe²⁺,Zn)₂Sb₄S₁₂S
Cu	ⓘ Chalcopyrite	CuFeS₂
Cu	ⓘ Chrysocolla	Cu_2-xAl_x(H_2-xSi₂O₅)(OH)₄ · nH₂O
Zn	Zinc
Zn	ⓘ Sphalerite	ZnS
Zn	ⓘ Tetrahedrite	Cu₆Cu₄(Fe²⁺,Zn)₂Sb₄S₁₂S
Se	Selenium
Se	ⓘ Guanajuatite	Bi₂Se₃
Sn	Tin
Sn	ⓘ Franckeite	Fe²⁺(Pb,Sn²⁺)₆Sn₂⁴⁺Sb₂S₁₄
Sb	Antimony
Sb	ⓘ Tetrahedrite	Cu₆Cu₄(Fe²⁺,Zn)₂Sb₄S₁₂S
Sb	ⓘ Franckeite	Fe²⁺(Pb,Sn²⁺)₆Sn₂⁴⁺Sb₂S₁₄
Pb	Lead
Pb	ⓘ Franckeite	Fe²⁺(Pb,Sn²⁺)₆Sn₂⁴⁺Sb₂S₁₄
Pb	ⓘ Cerussite	PbCO₃
Pb	ⓘ Galena	PbS
Bi	Bismuth
Bi	ⓘ Guanajuatite	Bi₂Se₃

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)

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 visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

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