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Winchester Mine, Green Mountain, Big Dry Creek Mining District, Fresno County, California, USAi
Regional Level Types
Winchester MineMine
Green MountainMountain
Big Dry Creek Mining DistrictMining District
Fresno CountyCounty
CaliforniaState
USACountry

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Latitude & Longitude (WGS84):
36° 57' 45'' North , 119° 24' 59'' West
Latitude & Longitude (decimal):
36.96250,-119.41639
GeoHash:
G#: 9qe468gdh
GRN:
N25W69
Type:
Mine
KΓΆppen climate type:
Csa : Hot-summer Mediterranean climate
Nearest Settlements:
PlacePopulationDistance
Auberry2,369 (2011)14.5km
Shaver Lake634 (2011)18.0km
Friant509 (2011)26.4km
Centerville392 (2011)26.4km
Minkler1,003 (2011)26.8km
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
ClubLocationDistance
Fresno Gem & Mineral SocietyFresno, California40km
Mindat Locality ID:
76608
Long-form identifier:
mindat:1:2:76608:4
GUID (UUID V4):
6c10fc7a-7ae4-4a5a-9f10-5b1436c70ce5


A former Cr mine located in sec. 24, T11S, R23E, MDM, 1.3 km (0.8 mile) SW of Green Mountain (coordinates of record, and 2.6 km (1.6 miles) E of Humphreys Station. MRDS database stated accuracy for this location is 100 meters.

Local rocks include ultramafic rocks, chiefly Mesozoic, unit 2 (Western Sierra Nevada and Klamath Mountains).

Workings include unspecified underground openings.

The chromite deposits of Watts Valley occur on the eastern limb of a synclinal, NE-plunging, ultramafic sill. The eastern limb, known as Hog Mountain, is a little over 1 mile wide, while the western limb, which forms Red Mountain, averages 3 miles wide. The 2 limbs join to the NW and together form a discontinuous, triangular exposure of peridotite 10 miles long and 8 miles wide across the base.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


7 valid minerals.

Detailed Mineral List:

β“˜ Albite
Formula: Na(AlSi3O8)
References:
Am Min 35:173-184
β“˜ Albite var. Andesine
Formula: (Na,Ca)[Al(Si,Al)Si2O8]
References:
Am Min 35:173-184
β“˜ Albite var. Oligoclase
Formula: (Na,Ca)[Al(Si,Al)Si2O8]
References:
Am Min 35:173-184
β“˜ Andalusite
Formula: Al2(SiO4)O
References:
Am Min 21:68-69
β“˜ 'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
β“˜ Cordierite
Formula: (Mg,Fe)2Al3(AlSi5O18)
β“˜ Orthoclase
Formula: K(AlSi3O8)
β“˜ 'Plagioclase'
Formula: (Na,Ca)[(Si,Al)AlSi2]O8
References:
Am Min 21:68-69
β“˜ Quartz
Formula: SiO2
β“˜ Schorl
Formula: NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)
References:
Am Min 35:173-184
β“˜ Sillimanite
Formula: Al2(SiO4)O
β“˜ 'Tourmaline'
Formula: AD3G6 (T6O18)(BO3)3X3Z
References:
Am Min 21:68-69

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
β“˜Quartz4.DA.05SiO2
Group 9 - Silicates
β“˜Sillimanite9.AF.05Al2(SiO4)O
β“˜Andalusite9.AF.10Al2(SiO4)O
β“˜Cordierite9.CJ.10(Mg,Fe)2Al3(AlSi5O18)
β“˜Schorl9.CK.05NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)
β“˜Orthoclase9.FA.30K(AlSi3O8)
β“˜Albite9.FA.35Na(AlSi3O8)
β“˜var. Andesine9.FA.35(Na,Ca)[Al(Si,Al)Si2O8]
β“˜var. Oligoclase9.FA.35(Na,Ca)[Al(Si,Al)Si2O8]
Unclassified
β“˜'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
β“˜'Tourmaline'-AD3G6 (T6O18)(BO3)3X3Z
β“˜'Plagioclase'-(Na,Ca)[(Si,Al)AlSi2]O8

List of minerals for each chemical element

HHydrogen
Hβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Hβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
BBoron
Bβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Bβ“˜ TourmalineAD3G6 (T6O18)(BO3)3X3Z
OOxygen
Oβ“˜ AlbiteNa(AlSi3O8)
Oβ“˜ AndalusiteAl2(SiO4)O
Oβ“˜ Albite var. Andesine(Na,Ca)[Al(Si,Al)Si2O8]
Oβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Oβ“˜ Cordierite(Mg,Fe)2Al3(AlSi5O18)
Oβ“˜ Albite var. Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
Oβ“˜ OrthoclaseK(AlSi3O8)
Oβ“˜ QuartzSiO2
Oβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Oβ“˜ SillimaniteAl2(SiO4)O
Oβ“˜ TourmalineAD3G6 (T6O18)(BO3)3X3Z
Oβ“˜ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
FFluorine
Fβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
NaSodium
Naβ“˜ AlbiteNa(AlSi3O8)
Naβ“˜ Albite var. Andesine(Na,Ca)[Al(Si,Al)Si2O8]
Naβ“˜ Albite var. Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
Naβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Naβ“˜ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
MgMagnesium
Mgβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Mgβ“˜ Cordierite(Mg,Fe)2Al3(AlSi5O18)
AlAluminium
Alβ“˜ AlbiteNa(AlSi3O8)
Alβ“˜ AndalusiteAl2(SiO4)O
Alβ“˜ Albite var. Andesine(Na,Ca)[Al(Si,Al)Si2O8]
Alβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Alβ“˜ Cordierite(Mg,Fe)2Al3(AlSi5O18)
Alβ“˜ Albite var. Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
Alβ“˜ OrthoclaseK(AlSi3O8)
Alβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Alβ“˜ SillimaniteAl2(SiO4)O
Alβ“˜ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
SiSilicon
Siβ“˜ AlbiteNa(AlSi3O8)
Siβ“˜ AndalusiteAl2(SiO4)O
Siβ“˜ Albite var. Andesine(Na,Ca)[Al(Si,Al)Si2O8]
Siβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Siβ“˜ Cordierite(Mg,Fe)2Al3(AlSi5O18)
Siβ“˜ Albite var. Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
Siβ“˜ OrthoclaseK(AlSi3O8)
Siβ“˜ QuartzSiO2
Siβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Siβ“˜ SillimaniteAl2(SiO4)O
Siβ“˜ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
KPotassium
Kβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Kβ“˜ OrthoclaseK(AlSi3O8)
CaCalcium
Caβ“˜ Albite var. Andesine(Na,Ca)[Al(Si,Al)Si2O8]
Caβ“˜ Albite var. Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
Caβ“˜ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
TiTitanium
Tiβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
FeIron
Feβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Feβ“˜ Cordierite(Mg,Fe)2Al3(AlSi5O18)
Feβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)

Other Databases

Link to USGS MRDS:10076536

Other Regions, Features and Areas containing this locality

North America PlateTectonic Plate
USA

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

(n.d.) Minerals Availability System (MAS), U.S. Bureau of Mines.file ID #0060190143
American Mineralogist (1936): 21: 68-69.
Rynearson, Garn Arthur (1948), Chromite deposits of Tulare and eastern Fresno Counties, California: California Division Mines Bulletin 134 part 3, chapter 3: 102, Pl. 6.
American Mineralogist (1950) 35: 173-184.
(2005) Mineral Resources Data System (MRDS), US Geological Survey.
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