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McLaughlin Mine (Manhattan Mine), Knoxville, Knoxville Mining District, Napa County, California, USAi
Regional Level Types
McLaughlin Mine (Manhattan Mine)Mine
Knoxville- not defined -
Knoxville Mining DistrictMining District
Napa CountyCounty
CaliforniaState
USACountry

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Latitude & Longitude (WGS84):
38° 50' 17'' North , 122° 21' 50'' West
Latitude & Longitude (decimal):
38.83806,-122.36389
GeoHash:
G#: 9qbuzw324
GRN:
N26W69
Type:
Mine
KΓΆppen climate type:
Csb : Warm-summer Mediterranean climate
Nearest Settlements:
PlacePopulationDistance
Guinda254 (2011)14.8km
Hidden Valley Lake5,579 (2011)17.2km
Lower Lake1,294 (2011)22.8km
Middletown1,323 (2011)23.7km
Clearlake15,182 (2017)26.3km
Mindat Locality ID:
15218
Long-form identifier:
mindat:1:2:15218:4
GUID (UUID V4):
d1a0b91a-caf4-4d11-a5b7-d2438e919e7b


A former open-cast Au-Ag-Pb-Hg-Sb occurrence/mine located in sec. 6, T11N, R4W, and in sec. 1, T11N, R5W, MDM, 2.4 km (7,900 feet) WNW of the Knoxville Mine. Discovered 1865. Worked 1863 - 1877, 1892 - 1905, 1916, 1927, 1932 - 1933, and 1936 - 1945. Some operations extended into Yolo and Lake counties.

The McLaughlin deposit is a large hot spring-type gold deposit located in the northern Coast Ranges of California at the faulted lithologic contact between the Coast Range ophiolite and the Great Valley sequence. The McLaughlin deposit is centered around the sheeted vein complex, a large multistage vein swarm, localized in a dilation zone formed by rheologic contrasts in the footwall polymictic melange. The surface expression of the sheeted vein complex is a subaerial sinter terrace, which merges into the sheeted vein complex. Metal zoning in the sheeted vein complex is highly telescoped. The sinter is enriched in mercury, whereas gold and silver are restricted to the upper 350 m. with the proportion of gold to silver decreasing with depth. Gold is typically present as electrum and is associated with silver and base metal-bearing sulfosalts. Below 350 m mineralization is dominated by small quartz veins with base metal sulfides.

Mineralization is a hydrothermal vein deposit. Host rock is aphanitic volcanic rock (tuff). The ore zone is irregular at 1609.3 meters (1 mile) long and 30.48 meters (several hundred yards ?) wide. The ore occurs as irregular veins of cinnabar filling joint cracks in Tertiary olivine basalt and is disseminated in the rocks adjoining the veins. Alteration is local: silicification of fault zones and tuff; bleaching and kaolinization of basalt. Volcanics are overlain by hot springs deposits.

Production: Ore ran more than 32-50 pounds/ton hand cobbed. Assay given as 18,520 grams/metric ton.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.


Mineral List


26 valid minerals.

Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

β“˜ Alunogen
Formula: Al2(SO4)3 · 17H2O
Colour: Yellow-white
Description: Occurs as micro-crystals on melanterite.
β“˜ Ammonioalunite
Formula: (NH4)Al3(SO4)2(OH)6
β“˜ Aragonite
Formula: CaCO3
β“˜ Arsenopyrite
Formula: FeAsS
β“˜ Baryte
Formula: BaSO4
β“˜ Buddingtonite
Formula: (NH4)(AlSi3O8)
β“˜ Calcite
Formula: CaCO3
β“˜ Cinnabar
Formula: HgS
β“˜ Gold
Formula: Au
Description: Dendritic.
β“˜ Gold var. Electrum
Formula: (Au,Ag)
β“˜ Jamesonite
Formula: Pb4FeSb6S14
Description: Occurs as delicate capillary crystals "feather ore" associated with cinnabar.
β“˜ Kaolinite
Formula: Al2(Si2O5)(OH)4
Description: Alteration product of basalt.
β“˜ 'K Feldspar'
β“˜ 'K Feldspar var. Adularia'
Formula: KAlSi3O8
β“˜ Marcasite
Formula: FeS2
β“˜ Melanterite
Formula: Fe2+(H2O)6SO4 · H2O
β“˜ Mercury
Formula: Hg
β“˜ Metacinnabar
Formula: HgS
β“˜ Miargyrite
Formula: AgSbS2
β“˜ Montmorillonite
Formula: (Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
β“˜ Montroydite
Formula: HgO
β“˜ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
β“˜ Muscovite var. Sericite
Formula: KAl2(AlSi3O10)(OH)2
β“˜ Opal
Formula: SiO2 · nH2O
Description: Brightly-colored, hydrocarbon-rich material.
β“˜ Opal var. Lemon Opal
Formula: SiO2 · nH2O
β“˜ Opal var. Precious Opal
Formula: SiO2 · nH2O
β“˜ Pyrargyrite
Formula: Ag3SbS3
β“˜ Pyrite
Formula: FeS2
References:
Dana 6: 1095-1096.
β“˜ Pyrolusite
Formula: Mn4+O2
Description: Occurs as radiating concentric masses with cinnabar.
β“˜ Quartz
Formula: SiO2
β“˜ Quartz var. Chalcedony
Formula: SiO2
Description: Occurs as "frothy" veins with associated mineral crystals.
β“˜ Quartz var. Myrickite
Formula: SiO2
β“˜ Senarmontite
Formula: Sb2O3
Habit: Octahedral
Description: Occurs as micro-octahedra in vugs and fissures of chert.
β“˜ Stibnite
Formula: Sb2S3
Description: Occurs as fibrous bands with cinnabar.

Gallery:

BaSO4β“˜ Baryte
SiO2 · nH2Oβ“˜ Opal
SiO2 · nH2Oβ“˜ Opal var. Lemon Opal
Sb2S3β“˜ Stibnite

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
β“˜Gold
var. Electrum		1.AA.05(Au,Ag)
β“˜1.AA.05Au
β“˜Mercury1.AD.05Hg
Group 2 - Sulphides and Sulfosalts
β“˜Metacinnabar2.CB.05aHgS
β“˜Cinnabar2.CD.15aHgS
β“˜Stibnite2.DB.05Sb2S3
β“˜Pyrite2.EB.05aFeS2
β“˜Marcasite2.EB.10aFeS2
β“˜Arsenopyrite2.EB.20FeAsS
β“˜Pyrargyrite2.GA.05Ag3SbS3
β“˜Miargyrite2.HA.10AgSbS2
β“˜Jamesonite2.HB.15Pb4FeSb6S14
Group 4 - Oxides and Hydroxides
β“˜Montroydite4.AC.15HgO
β“˜Senarmontite4.CB.50Sb2O3
β“˜Quartz4.DA.05SiO2
β“˜var. Myrickite4.DA.05SiO2
β“˜var. Chalcedony4.DA.05SiO2
β“˜Opal
var. Lemon Opal		4.DA.10SiO2 Β· nH2O
β“˜var. Precious Opal4.DA.10SiO2 Β· nH2O
β“˜4.DA.10SiO2 Β· nH2O
β“˜Pyrolusite4.DB.05Mn4+O2
Group 5 - Nitrates and Carbonates
β“˜Calcite5.AB.05CaCO3
β“˜Aragonite5.AB.15CaCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
β“˜Baryte7.AD.35BaSO4
β“˜Ammonioalunite7.BC.10(NH4)Al3(SO4)2(OH)6
β“˜Melanterite7.CB.35Fe2+(H2O)6SO4 Β· H2O
β“˜Alunogen7.CB.45Al2(SO4)3 Β· 17H2O
Group 9 - Silicates
β“˜Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
β“˜var. Sericite9.EC.15KAl2(AlSi3O10)(OH)2
β“˜Montmorillonite9.EC.40(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 Β· nH2O
β“˜Kaolinite9.ED.05Al2(Si2O5)(OH)4
β“˜Buddingtonite9.FA.30(NH4)(AlSi3O8)
Unclassified
β“˜'K Feldspar'-
β“˜'var. Adularia'-KAlSi3O8

List of minerals for each chemical element

HHydrogen
Hβ“˜ AlunogenAl2(SO4)3 · 17H2O
Hβ“˜ Ammonioalunite(NH4)Al3(SO4)2(OH)6
Hβ“˜ Buddingtonite(NH4)(AlSi3O8)
Hβ“˜ KaoliniteAl2(Si2O5)(OH)4
Hβ“˜ MelanteriteFe2+(H2O)6SO4 · H2O
Hβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Hβ“˜ Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Hβ“˜ OpalSiO2 · nH2O
Hβ“˜ Opal var. Precious OpalSiO2 · nH2O
Hβ“˜ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
Hβ“˜ Opal var. Lemon OpalSiO2 · nH2O
CCarbon
Cβ“˜ AragoniteCaCO3
Cβ“˜ CalciteCaCO3
NNitrogen
Nβ“˜ Ammonioalunite(NH4)Al3(SO4)2(OH)6
Nβ“˜ Buddingtonite(NH4)(AlSi3O8)
OOxygen
Oβ“˜ K Feldspar var. AdulariaKAlSi3O8
Oβ“˜ AlunogenAl2(SO4)3 · 17H2O
Oβ“˜ Ammonioalunite(NH4)Al3(SO4)2(OH)6
Oβ“˜ AragoniteCaCO3
Oβ“˜ BaryteBaSO4
Oβ“˜ Buddingtonite(NH4)(AlSi3O8)
Oβ“˜ CalciteCaCO3
Oβ“˜ Quartz var. ChalcedonySiO2
Oβ“˜ KaoliniteAl2(Si2O5)(OH)4
Oβ“˜ MelanteriteFe2+(H2O)6SO4 · H2O
Oβ“˜ MontroyditeHgO
Oβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Oβ“˜ Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Oβ“˜ OpalSiO2 · nH2O
Oβ“˜ PyrolusiteMn4+O2
Oβ“˜ QuartzSiO2
Oβ“˜ SenarmontiteSb2O3
Oβ“˜ Opal var. Precious OpalSiO2 · nH2O
Oβ“˜ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
Oβ“˜ Opal var. Lemon OpalSiO2 · nH2O
Oβ“˜ Quartz var. MyrickiteSiO2
NaSodium
Naβ“˜ Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
MgMagnesium
Mgβ“˜ Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
AlAluminium
Alβ“˜ K Feldspar var. AdulariaKAlSi3O8
Alβ“˜ AlunogenAl2(SO4)3 · 17H2O
Alβ“˜ Ammonioalunite(NH4)Al3(SO4)2(OH)6
Alβ“˜ Buddingtonite(NH4)(AlSi3O8)
Alβ“˜ KaoliniteAl2(Si2O5)(OH)4
Alβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Alβ“˜ Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Alβ“˜ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
SiSilicon
Siβ“˜ K Feldspar var. AdulariaKAlSi3O8
Siβ“˜ Buddingtonite(NH4)(AlSi3O8)
Siβ“˜ Quartz var. ChalcedonySiO2
Siβ“˜ KaoliniteAl2(Si2O5)(OH)4
Siβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Siβ“˜ Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Siβ“˜ OpalSiO2 · nH2O
Siβ“˜ QuartzSiO2
Siβ“˜ Opal var. Precious OpalSiO2 · nH2O
Siβ“˜ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
Siβ“˜ Opal var. Lemon OpalSiO2 · nH2O
Siβ“˜ Quartz var. MyrickiteSiO2
SSulfur
Sβ“˜ AlunogenAl2(SO4)3 · 17H2O
Sβ“˜ Ammonioalunite(NH4)Al3(SO4)2(OH)6
Sβ“˜ ArsenopyriteFeAsS
Sβ“˜ BaryteBaSO4
Sβ“˜ CinnabarHgS
Sβ“˜ JamesonitePb4FeSb6S14
Sβ“˜ MarcasiteFeS2
Sβ“˜ MelanteriteFe2+(H2O)6SO4 · H2O
Sβ“˜ MetacinnabarHgS
Sβ“˜ MiargyriteAgSbS2
Sβ“˜ PyrargyriteAg3SbS3
Sβ“˜ PyriteFeS2
Sβ“˜ StibniteSb2S3
KPotassium
Kβ“˜ K Feldspar var. AdulariaKAlSi3O8
Kβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Kβ“˜ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
CaCalcium
Caβ“˜ AragoniteCaCO3
Caβ“˜ CalciteCaCO3
Caβ“˜ Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
MnManganese
Mnβ“˜ PyrolusiteMn4+O2
FeIron
Feβ“˜ ArsenopyriteFeAsS
Feβ“˜ JamesonitePb4FeSb6S14
Feβ“˜ MarcasiteFeS2
Feβ“˜ MelanteriteFe2+(H2O)6SO4 · H2O
Feβ“˜ PyriteFeS2
AsArsenic
Asβ“˜ ArsenopyriteFeAsS
AgSilver
Agβ“˜ Gold var. Electrum(Au,Ag)
Agβ“˜ MiargyriteAgSbS2
Agβ“˜ PyrargyriteAg3SbS3
SbAntimony
Sbβ“˜ JamesonitePb4FeSb6S14
Sbβ“˜ MiargyriteAgSbS2
Sbβ“˜ PyrargyriteAg3SbS3
Sbβ“˜ SenarmontiteSb2O3
Sbβ“˜ StibniteSb2S3
BaBarium
Baβ“˜ BaryteBaSO4
AuGold
Auβ“˜ Gold var. Electrum(Au,Ag)
Auβ“˜ GoldAu
HgMercury
Hgβ“˜ CinnabarHgS
Hgβ“˜ MercuryHg
Hgβ“˜ MetacinnabarHgS
Hgβ“˜ MontroyditeHgO
PbLead
Pbβ“˜ JamesonitePb4FeSb6S14

Other Databases

Link to USGS MRDS:10040777

Other Regions, Features and Areas containing this locality

North America
North America PlateTectonic Plate

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.

References

Journal of Volcanology & Geothermal Resources (xxxx): 56: 401-414.
USGS MRDS ID #M055647.
(n.d.)
Dana, Edward Salisbury (1892) A System of Mineralogy (6th ed.)pp.1095-1096
Bradley, W.W. (1918) Quicksilver resources of California, with a section on metallurgy and ore dressing: California Mining Bureau Bulletin 78: 86.
Rocks & Minerals (1947): 22: 615.
Bailey, Edgar H. (1959) Froth veins, formed by immiscible hydrothermal fluids, in mercury deposits, California. Geological Society of America Bulletin 70: 661-664.
Davis, F.F., Bailey, E.H. (1966) Mercury. California Division Mines and Geology Bulletin 191.
Murdoch, Joseph, Webb, Robert W. (1966) Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 232, 304, 350.
Pemberton, H. Earl (1983) Minerals of California. Van Nostrand Reinhold Company Inc.
Sherlock, R. L., Lehrman, N. J. (1995) Occurrences of dendritic gold at the McLaughlin Mine. Mineralium Deposita: 30 (3-4): 323-327.
Sherlock, Ross L., Tosdal, Richard M., Lehrman, Norman J., Graney, Joseph R., Losh, Steven E., Jowett, Craig, Kesler, Stephen E. (1995) Origin of the McLaughlin Mine sheeted vein complex; metal zoning, fluid inclusion, and isotopic evidence. Economic Geology, 90(8), 2156-2181.
USGS MRDS database (2005), loc. file ID #10040777.
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