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Red Ledge Mine, Washington, Washington District (Omega District), Nevada Co., California, USA

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Latitude & Longitude (WGS84): 39° 20' 39'' North , 120° 48' 4'' West
Latitude & Longitude (decimal): 39.34429,-120.80103
GeoHash:G#: 9qfpg47m5
Locality type:Mine
Köppen climate type:Csb : Warm-summer Mediterranean climate


A former Au-Cr-Fe mine located in sec. 12 & in the NW¼NE¼ sec. 13, T17N, R10E, MDM, about 2 miles SW of Washington, on National Forest land. MRDS database stated accuracy for this location is 10 meters.

Note: not to be confused with Red Ledge mine in Sierra Co.

Gold-bearing quartz lode occurs along a major fault between serpentinized ultramafic rocks and amphibole schist of the Tightner Formation. The 10 to 30 foot lode extends about 8,000 feet. The gold occurs as leaves and plates in quartz, often accompanied by mariposite and ankerite gangue. Local rocks include ultramafic rocks, chiefly Mesozoic, unit 2 (Western Sierra Nevada and Klamath Mountains).

Gold Mine: The gold/quartz veins occur in the sedimentary rocks close to the contact with serpentinite. Mariposite is often in association with the serpentine, and in close proximity to the gold.

Chromite Mine: The Chromite occurs in lenses and pods in the serpentine, close to the contact with the sedimentary rocks. Chromite was produced from the Red Ledge in the 1918-19 time period. The ore grade was 45%.

Alternative Label Names

This is a list of additional names that have been recorded for mineral labels from this locality in the minID database. This may include previous versions of the locality name hierarchy from mindat.org.

Red Ledge Mine, Washington, Nevada Co, California, USA

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


18 valid minerals. 1 (TL) - type locality of valid minerals.

Detailed Mineral List:

Ankerite
Formula: Ca(Fe2+,Mg)(CO3)2
Reference: USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10031922.
Arsenopyrite
Formula: FeAsS
Calcite
Formula: CaCO3
Reference: Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 118, 256.
'Chlorite Group'
Reference: USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10163996.
Chromite
Formula: Fe2+Cr3+2O4
Reference: Trask, John Boardman (1853), Report on the geology of the Sierra Nevada, or California Range: California Legislature, 4th. sess., Ap. To Jour., S. Doc. 59, 30 pp.: 25; MacBoyle, Errol (1919), Mines and mineral resources of Nevada County: California Mining Bureau. Report 16, 270 pp. (published as separate chapter): 63; Melhase, John (1935c), Some garnet localities of California: Mineralogist: 3(11): 23; Hanks, Henry Garber (1884), Fourth report of the State Mineralogist: California Mining Bureau. Report 4, 410 pp.: 137; Palache, Charles, Harry Berman & Clifford Frondel (1944), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Seventh edition, Volume I, John Wiley & Sons, New York: 559-560.
Clinochlore
Formula: Mg5Al(AlSi3O10)(OH)8
Description: Abundant. Associated with calcite crystals.
Reference: MacBoyle, Errol (1919), Mines and mineral resources of Nevada County: California Mining Bureau. Report 16, 270 pp. (published as separate chapter): 77; Melhase, John (1935c), Some garnet localities of California: Mineralogist: 3(11): 23; Rynearson, Garn Arthur (1953), Geological investigations of chromite in California: Chromite deposits in the northern Sierra Nevada, California. California Division of Mines and Geology Bulletin 134, part 3 chapter 5: 239; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 434.
Clinochlore var: Chromian Clinochlore
Formula: Mg5(Al,Cr)2Si3O10(OH)8
Description: Abundant. Associated with calcite crystals.
Reference: MacBoyle, Errol (1919), Mines and mineral resources of Nevada County: California Mining Bureau. Report 16, 270 pp. (published as separate chapter): 77; Melhase, John (1935c), Some garnet localities of California: Mineralogist: 3(11): 23; Rynearson, Garn Arthur (1953), Geological investigations of chromite in California: Chromite deposits in the northern Sierra Nevada, California. California Division of Mines and Geology Bulletin 134, part 3 chapter 5: 239; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 434.
Copper
Formula: Cu
Reference: www.mineralsocal.org
Galena
Formula: PbS
Reference: MacBoyle, Errol (1919), Mines and mineral resources of Nevada County: California Mining Bureau. Report 16, 270 pp. (published as separate chapter): 67; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 350; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 130; www.mineralsocal.org
Gold
Formula: Au
Description: Superb specimens of crystallized gold from a pocket 1½ inches x 1½ inches (3.75 cm x 3.75 cm).
Reference: Rocks & Minerals (1939): 14: 337; Anonymous (1957), World news on mineral occurrences: Rocks & Minerals: 32: 12; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 203.
Knorringite
Formula: Mg3Cr2(SiO4)3
Reference: Handbook of Mineralogy
Magnesiochromite
Formula: MgCr2O4
Reference: www.mineralsocal.org
'Mariposite'
Formula: K(Al,Cr)2(Al,Si)4O10(OH)2
Reference: Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 256.
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Reference: Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 256.
'Phengite'
Formula: KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
Reference: Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 256.
Pyrite
Formula: FeS2
Reference: www.mineralsocal.org
Quartz
Formula: SiO2
Reference: MacBoyle, Errol (1919), Mines and mineral resources of Nevada County: California Mining Bureau. Report 16, 270 pp. (published as separate chapter): 67; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 350; www.mineralsocal.org
Redledgeite (TL)
Formula: Ba(Ti4+6Cr3+2)O16
Colour: Black
Description: Small, brilliant crystals with chromian clinochlore on chromite.
Reference: Gordon, Samuel G. & E.V. Shannon (1928), Chromrutile a new mineral from California: American Mineralogist: 13: 69; Bradley, W.W. (1940), Thirty-sixth report of the State Mineralogist: California Division Mines Report 36: 69; Palache, Charles, Harry Berman & Clifford Frondel (1944), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Seventh edition, Volume I, John Wiley & Sons, New York: 560; Strunz, Hugo (1961), “Chromrutil” von der Red Ledge mine ist kein rutil. Redledgeite: Neues Jahrb. Mineral., Monatsh.: 107; Strunz, Hugo (1963), Redledgeite, eine TiO2-einlagerungestruktur analog kryptomelan: Neues. Jahrb. Min. mh. 5: 116; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 174.
Rutile
Formula: TiO2
Description: Chromian variety.
Reference: Dana 7:I:559.
'Serpentine Subgroup'
Formula: D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
Reference: USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10163996.
Stibnite
Formula: Sb2S3
Reference: MacBoyle, Errol (1919), Mines and mineral resources of Nevada County: California Mining Bureau. Report 16, 270 pp. (published as separate chapter): 67; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 350; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 130; www.mineralsocal.org
Talc
Formula: Mg3Si4O10(OH)2
Reference: USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10163996.
Uvarovite
Formula: Ca3Cr2(SiO4)3
Colour: Green
Description: Occurs as fine crystals coating chromite.
Reference: MacBoyle, Errol (1919), Mines and mineral resources of Nevada County: California Mining Bureau. Report 16, 270 pp. (published as separate chapter): 77; Melhase, John (1935c), Some garnet localities of California: Mineralogist: 3(11): 23; Rynearson, Garn Arthur (1953), Geological investigations of chromite in California: Chromite deposits in the northern Sierra Nevada, California. California Division of Mines and Geology Bulletin 134, part 3 chapter 5: 239; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 497; www.mineralsocal.org

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Copper1.AA.05Cu
Gold1.AA.05Au
Group 2 - Sulphides and Sulfosalts
'Arsenopyrite'2.EB.20FeAsS
Galena2.CD.10PbS
Pyrite2.EB.05aFeS2
Stibnite2.DB.05Sb2S3
Group 4 - Oxides and Hydroxides
Chromite4.BB.05Fe2+Cr3+2O4
Magnesiochromite4.BB.05MgCr2O4
Quartz4.DA.05SiO2
Redledgeite (TL)4.DK.05bBa(Ti4+6Cr3+2)O16
Rutile4.DB.05TiO2
Group 5 - Nitrates and Carbonates
'Ankerite'5.AB.10Ca(Fe2+,Mg)(CO3)2
'Calcite'5.AB.05CaCO3
Group 9 - Silicates
Clinochlore9.EC.55Mg5Al(AlSi3O10)(OH)8
var: Chromian Clinochlore9.EC.55Mg5(Al,Cr)2Si3O10(OH)8
Knorringite9.AD.25Mg3Cr2(SiO4)3
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
Talc9.EC.05Mg3Si4O10(OH)2
Uvarovite9.AD.25Ca3Cr2(SiO4)3
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
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
Copper1.1.1.3Cu
Gold1.1.1.1Au
Group 2 - SULFIDES
AmXp, with m:p = 1:1
Galena2.8.1.1PbS
AmBnXp, with (m+n):p = 2:3
Stibnite2.11.2.1Sb2S3
AmBnXp, with (m+n):p = 1:2
Arsenopyrite2.12.4.1FeAsS
Pyrite2.12.1.1FeS2
Group 4 - SIMPLE OXIDES
AX2
Rutile4.4.1.1TiO2
Group 7 - MULTIPLE OXIDES
AB2X4
Chromite7.2.3.3Fe2+Cr3+2O4
Magnesiochromite7.2.3.1MgCr2O4
AB8X16
Redledgeite (TL)7.9.5.2Ba(Ti4+6Cr3+2)O16
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
AB(XO3)2
Ankerite14.2.1.2Ca(Fe2+,Mg)(CO3)2
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in [6] and >[6] coordination
Knorringite51.4.3a.4Mg3Cr2(SiO4)3
Uvarovite51.4.3b.3Ca3Cr2(SiO4)3
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Muscovite71.2.2a.1KAl2(AlSi3O10)(OH)2
Talc71.2.1.3Mg3Si4O10(OH)2
Sheets of 6-membered rings interlayered 1:1, 2:1, and octahedra
Clinochlore71.4.1.4Mg5Al(AlSi3O10)(OH)8
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Rocks, etc.
'Chlorite Group'-
Clinochlore
var: Chromian Clinochlore
-Mg5(Al,Cr)2Si3O10(OH)8
'Mariposite'-K(Al,Cr)2(Al,Si)4O10(OH)2
'Phengite'-KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
'Serpentine Subgroup'-D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn

List of minerals for each chemical element

HHydrogen
H Clinochlore (var: Chromian Clinochlore)Mg5(Al,Cr)2Si3O10(OH)8
H ClinochloreMg5Al(AlSi3O10)(OH)8
H MaripositeK(Al,Cr)2(Al,Si)4O10(OH)2
H MuscoviteKAl2(AlSi3O10)(OH)2
H PhengiteKAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
H Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
H TalcMg3Si4O10(OH)2
CCarbon
C AnkeriteCa(Fe2+,Mg)(CO3)2
C CalciteCaCO3
OOxygen
O AnkeriteCa(Fe2+,Mg)(CO3)2
O CalciteCaCO3
O Clinochlore (var: Chromian Clinochlore)Mg5(Al,Cr)2Si3O10(OH)8
O ChromiteFe2+Cr23+O4
O ClinochloreMg5Al(AlSi3O10)(OH)8
O KnorringiteMg3Cr2(SiO4)3
O MagnesiochromiteMgCr2O4
O MaripositeK(Al,Cr)2(Al,Si)4O10(OH)2
O MuscoviteKAl2(AlSi3O10)(OH)2
O PhengiteKAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
O QuartzSiO2
O RedledgeiteBa(Ti64+Cr23+)O16
O RutileTiO2
O Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
O TalcMg3Si4O10(OH)2
O UvaroviteCa3Cr2(SiO4)3
MgMagnesium
Mg AnkeriteCa(Fe2+,Mg)(CO3)2
Mg Clinochlore (var: Chromian Clinochlore)Mg5(Al,Cr)2Si3O10(OH)8
Mg ClinochloreMg5Al(AlSi3O10)(OH)8
Mg KnorringiteMg3Cr2(SiO4)3
Mg MagnesiochromiteMgCr2O4
Mg PhengiteKAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
Mg Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
Mg TalcMg3Si4O10(OH)2
AlAluminium
Al Clinochlore (var: Chromian Clinochlore)Mg5(Al,Cr)2Si3O10(OH)8
Al ClinochloreMg5Al(AlSi3O10)(OH)8
Al MaripositeK(Al,Cr)2(Al,Si)4O10(OH)2
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al PhengiteKAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
Al Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
SiSilicon
Si Clinochlore (var: Chromian Clinochlore)Mg5(Al,Cr)2Si3O10(OH)8
Si ClinochloreMg5Al(AlSi3O10)(OH)8
Si KnorringiteMg3Cr2(SiO4)3
Si MaripositeK(Al,Cr)2(Al,Si)4O10(OH)2
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si PhengiteKAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
Si QuartzSiO2
Si Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
Si TalcMg3Si4O10(OH)2
Si UvaroviteCa3Cr2(SiO4)3
SSulfur
S ArsenopyriteFeAsS
S GalenaPbS
S PyriteFeS2
S StibniteSb2S3
KPotassium
K MaripositeK(Al,Cr)2(Al,Si)4O10(OH)2
K MuscoviteKAl2(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 UvaroviteCa3Cr2(SiO4)3
TiTitanium
Ti RedledgeiteBa(Ti64+Cr23+)O16
Ti RutileTiO2
CrChromium
Cr Clinochlore (var: Chromian Clinochlore)Mg5(Al,Cr)2Si3O10(OH)8
Cr ChromiteFe2+Cr23+O4
Cr KnorringiteMg3Cr2(SiO4)3
Cr MagnesiochromiteMgCr2O4
Cr MaripositeK(Al,Cr)2(Al,Si)4O10(OH)2
Cr RedledgeiteBa(Ti64+Cr23+)O16
Cr UvaroviteCa3Cr2(SiO4)3
MnManganese
Mn Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
FeIron
Fe AnkeriteCa(Fe2+,Mg)(CO3)2
Fe ArsenopyriteFeAsS
Fe ChromiteFe2+Cr23+O4
Fe PhengiteKAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
Fe PyriteFeS2
Fe Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
NiNickel
Ni Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
CuCopper
Cu CopperCu
ZnZinc
Zn Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
AsArsenic
As ArsenopyriteFeAsS
SbAntimony
Sb StibniteSb2S3
BaBarium
Ba RedledgeiteBa(Ti64+Cr23+)O16
AuGold
Au GoldAu
PbLead
Pb GalenaPbS

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Trask, John Boardman (1853), Report on the geology of the Sierra Nevada, or California Range: California Legislature, 4th. sess., Ap. To Jour., S. Doc. 59, 30 pp.: 25.
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): 137.
Bradley, W.W., Huguenin, Emile, Logan, C.A., Tucker, W.B., and Waring, C.A. (1918), Manganese and chromium in California: California Mining Bureau. Bulletin 76, 248 pp.: 158.
Logan, Clarence August (1918), Unpublished Field Report, Nevada County No. 203, Red Ledge.
MacBoyle, Errol (1919), Mines and mineral resources of Nevada County: California Mining Bureau. Report 16, 270 pp. (published as separate chapter): 63, 67, 77.
Gordon, Samuel G. & E.V. Shannon (1928), Chromrutile a new mineral from California: American Mineralogist: 13: 69.
Melhase, John (1935c), Some garnet localities of California: Mineralogist: 3(11): 23.
Rocks & Minerals (1939): 14: 337.
Bradley, W.W. (1940), Thirty-sixth report of the State Mineralogist: California Division Mines Report 36: 69.
Palache, Charles, Harry Berman & Clifford Frondel (1944), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Seventh edition, Volume I, John Wiley & Sons, New York: 559-560.
Rynearson, Garn Arthur (1953), Geological investigations of chromite in California: Chromite deposits in the northern Sierra Nevada, California. California Division of Mines and Geology Bulletin 134, part 3 chapter 5: 239.
Anonymous (1957), World news on mineral occurrences: Rocks & Minerals: 32: 12.
Strunz, Hugo (1961), “Chromrutil” von der Red Ledge mine ist kein rutil. Redledgeite: Neues Jahrb. Mineral., Monatsh.: 107-111.
Strunz, Hugo (1963), Redledgeite, eine TiO2-einlagerungestruktur analog kryptomelan: Neues. Jahrb. Min. mh. 5: 116-119.
McCulloch, W.C., Oesterling, W.A., Spurck, W.H., & Tischler, M.S. (1964), Minerals for Industry, Northern California, Southern Pacific Company: Vol. II: 31.
Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 118, 136, 137, 141, 143, 194, 203, 256, 319, 350.
Bancroft, Peter (1973) The World's Finest Minerals and Crystals. Viking Press: 154.
Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 130, 174, 434, 497.
Bancroft, Peter (1984) Gem and Crystal Treasures. Western Enterprises, Mineralogical Record: 15: 89.
USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10031922 & 10163996.
U.S. Bureau of Mines, Minerals Availability System (MAS) file #0060570726.


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