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Socrates Mine, Castle Rock Springs area, West Mayacmas District, Mayacmas Mts (Mayacamas Mts), Sonoma Co., California, USAi
Regional Level Types
Socrates MineMine
Castle Rock Springs areaArea
West Mayacmas DistrictMining District
Mayacmas Mts (Mayacamas Mts)Mountain Range
Sonoma Co.County
CaliforniaState
USACountry

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Latitude & Longitude (WGS84): 38° 45' 47'' North , 122° 45' 29'' West
Latitude & Longitude (decimal): 38.76306,-122.75806
GeoHash:G#: 9qbsw8d71
Locality type:Mine
Köppen climate type:Csb : Warm-summer Mediterranean climate
Nearest Settlements:
PlacePopulationDistance
Cobb1,778 (2011)7.2km
Middletown1,323 (2011)12.5km
Geyserville862 (2011)14.0km
Hidden Valley Lake5,579 (2011)18.0km
Healdsburg11,742 (2017)19.5km


A former Hg mine located in secs. 32 & 33, T11N, R8W, MDM, 3.6 km (2.2 miles) W of Castle Rock Springs and about 8 miles W of Middletown.

This was the third richest mine in the district.

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:

Baryte
Formula: BaSO4
Description: Thick tabular micro-crystals.
Reference: Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 295; Mineralogical Record (1989) 20: 129-142.
Calcite
Formula: CaCO3
Reference: Bradley, W.W. (1918), Quicksilver resources of California, with a section on metallurgy and ore dressing: California Mining Bureau. Bulletin 78, 389 pp.: 191.
'Chlorite Group'
Reference: Bradley, W.W. (1918), Quicksilver resources of California, with a section on metallurgy and ore dressing: California Mining Bureau. Bulletin 78, 389 pp.: 191.
Cinnabar
Formula: HgS
Reference: Mineralogical Record (1989) 20:129-142; Bradley, W.W. (1918), Quicksilver resources of California, with a section on metallurgy and ore dressing: California Mining Bureau. Bulletin 78, 389 pp.: 191.
Dolomite
Formula: CaMg(CO3)2
Reference: Fen Cooper (2002) Mineral News, 18, #10, 1-8.
Edgarbaileyite
Formula: (Hg-Hg)3Si2O7
Reference: Mineral. Record, 21, 215{220.
Eglestonite
Formula: (Hg2+2)3OCl3(OH)
Colour: Greenish yellow
Description: Occurs as minute splotches associated with Mercury.
Reference: Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 197; Cooper, Fen (2002) Mineral News: 18(10): 1-8.
Magnesite
Formula: MgCO3
Reference: Cooper, Fen (2002) Mineral News: 18(10): 1-8.
Marcasite ?
Formula: FeS2
Reference: Bradley, W.W. (1918), Quicksilver resources of California, with a section on metallurgy and ore dressing: California Mining Bureau. Bulletin 78, 389 pp.: 191.
Mercury
Formula: Hg
Description: Principle ore mineral here.
Reference: Aubury, Lewis E. (1903), The quicksilver resources of California: California Mining Bureau Bulletin 27: 115; Bradley, W.W. (1918), Quicksilver resources of California, with a section on metallurgy and ore dressing: California Mining Bureau. Bulletin 78, 389 pp.: 191, 193, 195; Bailey, Edgar H. (1946), Quicksilver deposits of the western Mayacmas district, Sonoma County, California: California Journal of Mines & Geology, California Division Mines (Report 42): 42: 216; Mineralogical Record (1989) 20: 129-142.
Metacinnabar
Formula: HgS
Reference: Mineralogical Record (1989) 20:129-142
Montroydite
Formula: HgO
Description: Occurs as crystals on globules of mercury.
Reference: Bailey, Edgar H. (1946), Quicksilver deposits of the western Mayacmas district, Sonoma County, California: California Journal of Mines & Geology, California Division Mines (Report 42): 42: 216; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 181; Mineralogical Record (1989) 20: 129-142.
Opal
Formula: SiO2 · nH2O
Reference: Bradley, W.W. (1918), Quicksilver resources of California, with a section on metallurgy and ore dressing: California Mining Bureau. Bulletin 78, 389 pp.: 191.
Pyrite
Formula: FeS2
Reference: Bradley, W.W. (1918), Quicksilver resources of California, with a section on metallurgy and ore dressing: California Mining Bureau. Bulletin 78, 389 pp.: 191.
Quartz
Formula: SiO2
Reference: Fen Cooper (2002) Mineral News, 18, #10, 1-8.
Quartz var: Chalcedony
Formula: SiO2
Reference: Fen Cooper (2002) Mineral News, 18, #10, 1-8.; Bradley, W.W. (1918), Quicksilver resources of California, with a section on metallurgy and ore dressing: California Mining Bureau. Bulletin 78, 389 pp.: 191.
'Serpentine Subgroup'
Formula: D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
Reference: Fen Cooper (2002) Mineral News, 18, #10, 1-8.
Tiemannite
Formula: HgSe
Reference: Bradley, W.W. (1918), Quicksilver resources of California, with a section on metallurgy and ore dressing: California Mining Bureau. Bulletin 78, 389 pp.: 191, 195; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 367.

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Mercury1.AD.05Hg
Group 2 - Sulphides and Sulfosalts
Cinnabar2.CD.15aHgS
Marcasite ?2.EB.10aFeS2
Metacinnabar2.CB.05aHgS
Pyrite2.EB.05aFeS2
Tiemannite2.CB.05aHgSe
Group 3 - Halides
Eglestonite3.DD.05(Hg2+2)3OCl3(OH)
Group 4 - Oxides and Hydroxides
Montroydite4.AC.15HgO
Opal4.DA.10SiO2 · nH2O
Quartz4.DA.05SiO2
var: Chalcedony4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Dolomite5.AB.10CaMg(CO3)2
Magnesite5.AB.05MgCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Baryte7.AD.35BaSO4
Group 9 - Silicates
Edgarbaileyite9.BC.25(Hg-Hg)3Si2O7
Unclassified Minerals, Rocks, etc.
'Chlorite Group'-
'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
Mercury1.1.7.1Hg
Group 2 - SULFIDES
AmXp, with m:p = 1:1
Cinnabar2.8.14.1HgS
Metacinnabar2.8.2.3HgS
Tiemannite2.8.2.4HgSe
AmBnXp, with (m+n):p = 1:2
Marcasite ?2.12.2.1FeS2
Pyrite2.12.1.1FeS2
Group 4 - SIMPLE OXIDES
AX
Montroydite4.2.6.1HgO
Group 10 - OXYHALIDES AND HYDROXYHALIDES
Am(O,OH)pXq
Eglestonite10.5.4.1(Hg2+2)3OCl3(OH)
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Magnesite14.1.1.2MgCO3
AB(XO3)2
Dolomite14.2.1.1CaMg(CO3)2
Group 28 - ANHYDROUS ACID AND NORMAL SULFATES
AXO4
Baryte28.3.1.1BaSO4
Group 55 - SOROSILICATES Si2O7 Groups,Generally with no Additional Anions
Si2O7 Groups, Generally with No Additional Anions with dimeric cations
Edgarbaileyite55.5.1.1(Hg-Hg)3Si2O7
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Si Tetrahedral Frameworks - SiO2 with H2O and organics
Opal75.2.1.1SiO2 · nH2O
Unclassified Minerals, Mixtures, etc.
'Chlorite Group'-
Quartz
var: Chalcedony
-SiO2
'Serpentine Subgroup'-D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn

List of minerals for each chemical element

HHydrogen
H Eglestonite(Hg22+)3OCl3(OH)
H Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
H OpalSiO2 · nH2O
CCarbon
C MagnesiteMgCO3
C DolomiteCaMg(CO3)2
C CalciteCaCO3
OOxygen
O Edgarbaileyite(Hg-Hg)3Si2O7
O QuartzSiO2
O MontroyditeHgO
O Eglestonite(Hg22+)3OCl3(OH)
O Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
O MagnesiteMgCO3
O DolomiteCaMg(CO3)2
O Quartz (var: Chalcedony)SiO2
O BaryteBaSO4
O OpalSiO2 · nH2O
O CalciteCaCO3
MgMagnesium
Mg Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
Mg MagnesiteMgCO3
Mg DolomiteCaMg(CO3)2
AlAluminium
Al Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
SiSilicon
Si Edgarbaileyite(Hg-Hg)3Si2O7
Si QuartzSiO2
Si Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
Si Quartz (var: Chalcedony)SiO2
Si OpalSiO2 · nH2O
SSulfur
S CinnabarHgS
S PyriteFeS2
S BaryteBaSO4
S MetacinnabarHgS
S MarcasiteFeS2
ClChlorine
Cl Eglestonite(Hg22+)3OCl3(OH)
CaCalcium
Ca DolomiteCaMg(CO3)2
Ca CalciteCaCO3
MnManganese
Mn Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
FeIron
Fe PyriteFeS2
Fe Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
Fe MarcasiteFeS2
NiNickel
Ni Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
ZnZinc
Zn Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
SeSelenium
Se TiemanniteHgSe
BaBarium
Ba BaryteBaSO4
HgMercury
Hg CinnabarHgS
Hg Edgarbaileyite(Hg-Hg)3Si2O7
Hg MercuryHg
Hg MontroyditeHgO
Hg Eglestonite(Hg22+)3OCl3(OH)
Hg MetacinnabarHgS
Hg TiemanniteHgSe

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

Cretaceous - Jurassic
66 - 201.3 Ma



ID: 3190324
Mesozoic tectonic rocks

Age: Mesozoic (66 - 201.3 Ma)

Stratigraphic Name: Franciscan Complex

Comments: metamorphic protolith: mafic volcanics

Lithology: Shale

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]

Cretaceous - Jurassic
66 - 201.3 Ma



ID: 2791046
Franciscan melange

Age: Mesozoic (66 - 201.3 Ma)

Stratigraphic Name: Franciscan Complex

Description: Melange of fragmented and sheared Franciscan complex rocks.

Comments: Coast Ranges. Includes areas of Franciscan rocks specifically distinguished as melange on the Geologic Map of California. Includes parts of central and eastern Franciscan belts of Blake et al. (1988) 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:{melange}

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]

Late Jurassic - Middle Jurassic
145 - 174.1 Ma



ID: 2597914
Great Valley Complex; Coast Range ophiolite, serpentinite

Age: Jurassic (145 - 174.1 Ma)

Description: Mainly sheared serpentinite, but also includes massive serpentinized harzburgite. In places altered to silica carbonate rock

Reference: Blake, M.C. Jr., R.W. Graymer, R.E. Stamski. Geologic Map and Map Database of Western Sonoma, Northernmost Marin, and Southernmost Mendocino Counties, California. U.S. Geological Survey Miscellaneous Field Studies Map MF-2402. [93]

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)
Becker, George F. (1888b), Geology of the quicksilver deposits of the Pacific slope: USGS Monograph 13, atlas: 377.
Aubury, Lewis E. (1903), The quicksilver resources of California: California Mining Bureau Bulletin 27: 115.
Bradley, W.W. (1918), Quicksilver resources of California, with a section on metallurgy and ore dressing: California Mining Bureau. Bulletin 78, 389 pp.: 193, 195.
Ross, C.P. (1940b) Quicksilver deposits of the Mayacmas and Sulphur Bank districts, California. USGS Bulletin 922-L: 330.
Bailey, Edgar H. (1946), Quicksilver deposits of the western Mayacmas district, Sonoma County, California: California Journal of Mines & Geology, California Division Mines (Report 42): 42: 199-230.
Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 261, 274, 367.
Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 124, 181, 197, 295.
Mineralogical Record (1989) 20: 129-142.
Cooper, Fen (2002) Mineral News: 18(10): 1-8.


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