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Salmon Falls Mining District (Flagstaff Hill area), El Dorado Co., California, USAi
Regional Level Types
Salmon Falls Mining District (Flagstaff Hill area)Mining District
El Dorado Co.County
CaliforniaState
USACountry

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Latitude & Longitude (WGS84):
38° North , 120° West (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~58km
Locality type:


A former Cr-Fe mining area located in the vicinity of Salmon Falls (now inundated beneath Folsom Lake (reservoir) and Flagstaff Hill.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List

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

18 valid minerals.

Detailed Mineral List:

β“˜ Antigorite
Formula: Mg3(Si2O5)(OH)4
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
β“˜ Chalcopyrite
Formula: CuFeS2
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
β“˜ 'Chlorite Group'
Localities:
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
β“˜ Chromite
Formula: Fe2+Cr3+2O4
Localities: Reported from at least 17 localities in this region.
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
β“˜ Clinochlore
Formula: Mg5Al(AlSi3O10)(OH)8
Reference: Post, J.L. and Plummer, C.C. (1972) The chlorite series of Flagstaff Hill area, California. Clays and Clay Minerals: 20: 271-283; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 433.
β“˜ Clinochlore var. Chromium-bearing Clinochlore
Formula: Mg5(Al,Cr)2Si3O10(OH)8
Reference: Averill, Charles V. (1942), Chromium: California Division Mines Report 38: 90; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 136; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 434.
β“˜ Clinochlore var. Pennine
Formula: Mg5Al(AlSi3O10)(OH)8
Reference: Post, J.L. and Plummer, C.C. (1972) The chlorite series of Flagstaff Hill area, California. Clays and Clay Minerals: 20: 271-283; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 433.
β“˜ Clinochlore var. Ripidolite
Formula: (Mg,Fe,Al)6(Si,Al)4O10(OH)8
Reference: Post, J.L. and Plummer, C.C. (1972) The chlorite series of Flagstaff Hill area, California. Clays and Clay Minerals: 20: 271-283; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 433; http://cms.lanl.gov/chem.htm.
β“˜ Clinochlore var. Sheridanite
Formula: (Mg,Al,Fe)6(Si,Al)4O10(OH)8
Reference: Post, J.L. and Plummer, C.C. (1972) The chlorite series of Flagstaff Hill area, California. Clays and Clay Minerals: 20: 271-283; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 433.
β“˜ Diopside
Formula: CaMgSi2O6
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
β“˜ Diopside var. Diallage
Formula: CaMgSi2O6
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
β“˜ Enstatite
Formula: Mg2Si2O6
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
β“˜ Epidote
Formula: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
β“˜ 'Fayalite-Forsterite Series'
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
β“˜ Galena
Formula: PbS
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
β“˜ 'Garnierite'
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
β“˜ Magnesiochromite
Formula: MgCr2O4
Localities: Reported from at least 7 localities in this region.
Reference: Bradley, W.W., et al (1918), Manganese and chromium in California: California Mining Bureau. Bulletin 76: 133; Cater, F.W., Jr., G.A. Rynearson & D.H. Dow (1951), Chromite deposits of El Dorado County, California: California Division Mines Bulletin 134, part III, Chapter 4: 108-167; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 155, 156 (map 4-7).
β“˜ Magnesite
Formula: MgCO3
Localities: Reported from at least 6 localities in this region.
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
β“˜ Magnetite
Formula: Fe2+Fe3+2O4
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
β“˜ NΓ©pouite
Formula: (Ni,Mg)3(Si2O5)(OH)4
Description: Occurs in laterite soils.
Reference: Clark, Wm. B. & D.W. Carlson (1956), Mines and mineral resources of El Dorado County, California: California Journal of Mines and Geology: 52(4): 387, 438; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 197; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 422.
β“˜ Opal
Formula: SiO2 · nH2O
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
β“˜ Pyrite
Formula: FeS2
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
β“˜ 'Pyroxene Group'
Formula: ADSi2O6
Reference: USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10163017.
β“˜ Rectorite
Formula: (Na,Ca)Al4((Si,Al)8O20)(OH)4 · 2H2O
Reference: www.agry.purdue.edu/cjohnston/sourceclays/RAr-1.pdf.
β“˜ 'Serpentine Subgroup'
Formula: D3[Si2O5](OH)4
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
β“˜ Sphalerite
Formula: ZnS
Reference: Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 82.
β“˜ Talc
Formula: Mg3Si4O10(OH)2
Localities: Reported from at least 8 localities in this region.
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
β“˜ Uvarovite
Formula: Ca3Cr2(SiO4)3
Reference: Averill, Charles V. (1942), Chromium: California Division Mines Report 38: 90; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 136, 193; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 495.

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
β“˜Chalcopyrite2.CB.10aCuFeS2
β“˜Galena2.CD.10PbS
β“˜Pyrite2.EB.05aFeS2
β“˜Sphalerite2.CB.05aZnS
Group 4 - Oxides and Hydroxides
β“˜Chromite4.BB.05Fe2+Cr3+2O4
β“˜Magnesiochromite4.BB.05MgCr2O4
β“˜Magnetite4.BB.05Fe2+Fe3+2O4
β“˜Opal4.DA.10SiO2 Β· nH2O
Group 5 - Nitrates and Carbonates
β“˜Magnesite5.AB.05MgCO3
Group 9 - Silicates
β“˜Antigorite9.ED.15Mg3(Si2O5)(OH)4
β“˜Clinochlore9.EC.55Mg5Al(AlSi3O10)(OH)8
β“˜var. Chromium-bearing Clinochlore9.EC.55Mg5(Al,Cr)2Si3O10(OH)8
β“˜var. Pennine9.EC.55Mg5Al(AlSi3O10)(OH)8
β“˜var. Ripidolite9.EC.55(Mg,Fe,Al)6(Si,Al)4O10(OH)8
β“˜var. Sheridanite9.EC.55(Mg,Al,Fe)6(Si,Al)4O10(OH)8
β“˜Diopside9.DA.15CaMgSi2O6
β“˜var. Diallage9.DA.15CaMgSi2O6
β“˜Enstatite9.DA.05Mg2Si2O6
β“˜Epidote9.BG.05a{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
β“˜NΓ©pouite9.ED.15(Ni,Mg)3(Si2O5)(OH)4
β“˜Rectorite9.EC.60(Na,Ca)Al4((Si,Al)8O20)(OH)4 Β· 2H2O
β“˜Talc9.EC.05Mg3Si4O10(OH)2
β“˜Uvarovite9.AD.25Ca3Cr2(SiO4)3
Unclassified Minerals, Rocks, etc.
β“˜'Chlorite Group'-
β“˜'Fayalite-Forsterite Series'-
β“˜'Garnierite'-
β“˜'Pyroxene Group'-ADSi2O6
β“˜'Serpentine Subgroup'-D3[Si2O5](OH)4

List of minerals for each chemical element

HHydrogen
Hβ“˜ Clinochlore var. Ripidolite(Mg,Fe,Al)6(Si,Al)4O10(OH)8
Hβ“˜ TalcMg3Si4O10(OH)2
Hβ“˜ Serpentine SubgroupD3[Si2O5](OH)4
Hβ“˜ OpalSiO2 · nH2O
Hβ“˜ Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Hβ“˜ AntigoriteMg3(Si2O5)(OH)4
Hβ“˜ Rectorite(Na,Ca)Al4((Si,Al)8O20)(OH)4 · 2H2O
Hβ“˜ NΓ©pouite(Ni,Mg)3(Si2O5)(OH)4
Hβ“˜ Clinochlore var. Chromium-bearing ClinochloreMg5(Al,Cr)2Si3O10(OH)8
Hβ“˜ Clinochlore var. Sheridanite(Mg,Al,Fe)6(Si,Al)4O10(OH)8
Hβ“˜ ClinochloreMg5Al(AlSi3O10)(OH)8
Hβ“˜ Clinochlore var. PennineMg5Al(AlSi3O10)(OH)8
CCarbon
Cβ“˜ MagnesiteMgCO3
OOxygen
Oβ“˜ Clinochlore var. Ripidolite(Mg,Fe,Al)6(Si,Al)4O10(OH)8
Oβ“˜ ChromiteFe2+Cr23+O4
Oβ“˜ TalcMg3Si4O10(OH)2
Oβ“˜ MagnesiteMgCO3
Oβ“˜ Serpentine SubgroupD3[Si2O5](OH)4
Oβ“˜ Diopside var. DiallageCaMgSi2O6
Oβ“˜ EnstatiteMg2Si2O6
Oβ“˜ OpalSiO2 · nH2O
Oβ“˜ Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Oβ“˜ AntigoriteMg3(Si2O5)(OH)4
Oβ“˜ MagnetiteFe2+Fe23+O4
Oβ“˜ Rectorite(Na,Ca)Al4((Si,Al)8O20)(OH)4 · 2H2O
Oβ“˜ MagnesiochromiteMgCr2O4
Oβ“˜ NΓ©pouite(Ni,Mg)3(Si2O5)(OH)4
Oβ“˜ UvaroviteCa3Cr2(SiO4)3
Oβ“˜ Clinochlore var. Chromium-bearing ClinochloreMg5(Al,Cr)2Si3O10(OH)8
Oβ“˜ Clinochlore var. Sheridanite(Mg,Al,Fe)6(Si,Al)4O10(OH)8
Oβ“˜ ClinochloreMg5Al(AlSi3O10)(OH)8
Oβ“˜ Clinochlore var. PennineMg5Al(AlSi3O10)(OH)8
Oβ“˜ Pyroxene GroupADSi2O6
Oβ“˜ DiopsideCaMgSi2O6
NaSodium
Naβ“˜ Rectorite(Na,Ca)Al4((Si,Al)8O20)(OH)4 · 2H2O
MgMagnesium
Mgβ“˜ Clinochlore var. Ripidolite(Mg,Fe,Al)6(Si,Al)4O10(OH)8
Mgβ“˜ TalcMg3Si4O10(OH)2
Mgβ“˜ MagnesiteMgCO3
Mgβ“˜ Diopside var. DiallageCaMgSi2O6
Mgβ“˜ EnstatiteMg2Si2O6
Mgβ“˜ AntigoriteMg3(Si2O5)(OH)4
Mgβ“˜ MagnesiochromiteMgCr2O4
Mgβ“˜ NΓ©pouite(Ni,Mg)3(Si2O5)(OH)4
Mgβ“˜ Clinochlore var. Chromium-bearing ClinochloreMg5(Al,Cr)2Si3O10(OH)8
Mgβ“˜ Clinochlore var. Sheridanite(Mg,Al,Fe)6(Si,Al)4O10(OH)8
Mgβ“˜ ClinochloreMg5Al(AlSi3O10)(OH)8
Mgβ“˜ Clinochlore var. PennineMg5Al(AlSi3O10)(OH)8
Mgβ“˜ DiopsideCaMgSi2O6
AlAluminium
Alβ“˜ Clinochlore var. Ripidolite(Mg,Fe,Al)6(Si,Al)4O10(OH)8
Alβ“˜ Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Alβ“˜ Rectorite(Na,Ca)Al4((Si,Al)8O20)(OH)4 · 2H2O
Alβ“˜ Clinochlore var. Chromium-bearing ClinochloreMg5(Al,Cr)2Si3O10(OH)8
Alβ“˜ Clinochlore var. Sheridanite(Mg,Al,Fe)6(Si,Al)4O10(OH)8
Alβ“˜ ClinochloreMg5Al(AlSi3O10)(OH)8
Alβ“˜ Clinochlore var. PennineMg5Al(AlSi3O10)(OH)8
SiSilicon
Siβ“˜ Clinochlore var. Ripidolite(Mg,Fe,Al)6(Si,Al)4O10(OH)8
Siβ“˜ TalcMg3Si4O10(OH)2
Siβ“˜ Serpentine SubgroupD3[Si2O5](OH)4
Siβ“˜ Diopside var. DiallageCaMgSi2O6
Siβ“˜ EnstatiteMg2Si2O6
Siβ“˜ OpalSiO2 · nH2O
Siβ“˜ Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Siβ“˜ AntigoriteMg3(Si2O5)(OH)4
Siβ“˜ Rectorite(Na,Ca)Al4((Si,Al)8O20)(OH)4 · 2H2O
Siβ“˜ NΓ©pouite(Ni,Mg)3(Si2O5)(OH)4
Siβ“˜ UvaroviteCa3Cr2(SiO4)3
Siβ“˜ Clinochlore var. Chromium-bearing ClinochloreMg5(Al,Cr)2Si3O10(OH)8
Siβ“˜ Clinochlore var. Sheridanite(Mg,Al,Fe)6(Si,Al)4O10(OH)8
Siβ“˜ ClinochloreMg5Al(AlSi3O10)(OH)8
Siβ“˜ Clinochlore var. PennineMg5Al(AlSi3O10)(OH)8
Siβ“˜ Pyroxene GroupADSi2O6
Siβ“˜ DiopsideCaMgSi2O6
SSulfur
Sβ“˜ PyriteFeS2
Sβ“˜ GalenaPbS
Sβ“˜ SphaleriteZnS
Sβ“˜ ChalcopyriteCuFeS2
CaCalcium
Caβ“˜ Diopside var. DiallageCaMgSi2O6
Caβ“˜ Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Caβ“˜ Rectorite(Na,Ca)Al4((Si,Al)8O20)(OH)4 · 2H2O
Caβ“˜ UvaroviteCa3Cr2(SiO4)3
Caβ“˜ DiopsideCaMgSi2O6
CrChromium
Crβ“˜ ChromiteFe2+Cr23+O4
Crβ“˜ MagnesiochromiteMgCr2O4
Crβ“˜ UvaroviteCa3Cr2(SiO4)3
Crβ“˜ Clinochlore var. Chromium-bearing ClinochloreMg5(Al,Cr)2Si3O10(OH)8
FeIron
Feβ“˜ Clinochlore var. Ripidolite(Mg,Fe,Al)6(Si,Al)4O10(OH)8
Feβ“˜ PyriteFeS2
Feβ“˜ ChalcopyriteCuFeS2
Feβ“˜ ChromiteFe2+Cr23+O4
Feβ“˜ Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Feβ“˜ MagnetiteFe2+Fe23+O4
Feβ“˜ Clinochlore var. Sheridanite(Mg,Al,Fe)6(Si,Al)4O10(OH)8
NiNickel
Niβ“˜ NΓ©pouite(Ni,Mg)3(Si2O5)(OH)4
CuCopper
Cuβ“˜ ChalcopyriteCuFeS2
ZnZinc
Znβ“˜ SphaleriteZnS
PbLead
Pbβ“˜ GalenaPbS

References

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USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10043678 (Flagstaff Hill area) &

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