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Unnamed Mn-Asbestos-Zeolite occurrence (1), Shadow Lake, Minarets Mining District (Mountain Mining District; Raymond Mining District; Minaret Mining District), Ritter Range, Madera County, California, USAi
Regional Level Types
Unnamed Mn-Asbestos-Zeolite occurrence (1)Occurrence
Shadow LakeLake
Minarets Mining District (Mountain Mining District; Raymond Mining District; Minaret Mining District)Mining District
Ritter RangeMountain Range
Madera CountyCounty
CaliforniaState
USACountry

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Latitude & Longitude (WGS84):
37° 42' 9'' North , 119° 7' 47'' West
Latitude & Longitude (decimal):
37.70250,-119.12972
GeoHash:
G#: 9qeq3ps2u
GRN:
N26W67
Type:
Occurrence
Köppen climate type:
Csb : Warm-summer Mediterranean climate
Nearest Settlements:
PlacePopulationDistance
June Lake629 (2011)9.8km
Mammoth Lakes7,946 (2018)15.1km
Lee Vining222 (2011)28.3km
Mono City172 (2011)37.6km
Yosemite Valley1,035 (2011)39.6km
Mindat Locality ID:
218946
Long-form identifier:
mindat:1:2:218946:1
GUID (UUID V4):
0


An occurrence located in the SE¼SE¼SW¼ sec. 8, T3S, R26E, MDM, about 0.1 miles (100 yards - 95 meters) NE of Shadow Lake.

NOTE: Coordinates provided are approximate to the center of sec. 8.

Mineralization is hosted in metavolcanic rocks and sericite schist.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


5 valid minerals.

Detailed Mineral List:

ⓘ 'Amphibole Asbestos'
Colour: White
Description: Fibrous in piemontite-schist.
ⓘ Calcite
Formula: CaCO3
ⓘ 'Garnet Group'
Formula: X3Z2(SiO4)3
Colour: Orange
Description: Small crystals in cavities. Suspected to be spessartine.
ⓘ 'Heulandite Subgroup'
Formula: (Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
Habit: Platy
Colour: Colorless
Description: Occurs as plates up to 2 mm diameter.
ⓘ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
ⓘ Muscovite var. Sericite
Formula: KAl2(AlSi3O10)(OH)2
ⓘ Piemontite
Formula: (CaCa)(AlAlMn3+)O[Si2O7][SiO4](OH)
Description: Occurs as minute needles in a sericite schist, about 100 yards (95 meters) downstream from the outlet of Shadow Lake.
ⓘ Quartz
Formula: SiO2
ⓘ Spessartine
Formula: Mn2+3Al2(SiO4)3
Description: (Deduced from colour and paragenesis, as described in the Short (1933) paper. Uwe Kolitsch, Sept. 2024)
ⓘ 'Stilbite Subgroup'
Formula: M6-7[Al8-9Si27-28O72] · nH2O
Colour: Straw-yellow
Description: Occurs as radiating aggregates to 6 mm long in piemontite-bearing metavolcanic rock.

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
ⓘQuartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
ⓘCalcite5.AB.05CaCO3
Group 9 - Silicates
ⓘSpessartine9.AD.25Mn2+3Al2(SiO4)3
ⓘPiemontite9.BG.05a(CaCa)(AlAlMn3+)O[Si2O7][SiO4](OH)
ⓘMuscovite9.EC.15KAl2(AlSi3O10)(OH)2
ⓘvar. Sericite9.EC.15KAl2(AlSi3O10)(OH)2
Unclassified
ⓘ'Heulandite Subgroup'-(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
ⓘ'Stilbite Subgroup'-M6-7[Al8-9Si27-28O72] · nH2O
ⓘ'Garnet Group'-X3Z2(SiO4)3
ⓘ'Amphibole Asbestos'-

List of minerals for each chemical element

HHydrogen
Hⓘ Heulandite Subgroup(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
Hⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Hⓘ Piemontite(CaCa)(AlAlMn3+)O[Si2O7][SiO4](OH)
Hⓘ Stilbite SubgroupM6-7[Al8-9Si27-28O72] · nH2O
Hⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
CCarbon
Cⓘ CalciteCaCO3
OOxygen
Oⓘ CalciteCaCO3
Oⓘ Heulandite Subgroup(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
Oⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Oⓘ Piemontite(CaCa)(AlAlMn3+)O[Si2O7][SiO4](OH)
Oⓘ QuartzSiO2
Oⓘ SpessartineMn32+Al2(SiO4)3
Oⓘ Stilbite SubgroupM6-7[Al8-9Si27-28O72] · nH2O
Oⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
Oⓘ Garnet GroupX3Z2(SiO4)3
NaSodium
Naⓘ Heulandite Subgroup(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
AlAluminium
Alⓘ Heulandite Subgroup(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
Alⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Alⓘ Piemontite(CaCa)(AlAlMn3+)O[Si2O7][SiO4](OH)
Alⓘ SpessartineMn32+Al2(SiO4)3
Alⓘ Stilbite SubgroupM6-7[Al8-9Si27-28O72] · nH2O
Alⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
SiSilicon
Siⓘ Heulandite Subgroup(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
Siⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Siⓘ Piemontite(CaCa)(AlAlMn3+)O[Si2O7][SiO4](OH)
Siⓘ QuartzSiO2
Siⓘ SpessartineMn32+Al2(SiO4)3
Siⓘ Stilbite SubgroupM6-7[Al8-9Si27-28O72] · nH2O
Siⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
Siⓘ Garnet GroupX3Z2(SiO4)3
KPotassium
Kⓘ Heulandite Subgroup(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
Kⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Kⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
CaCalcium
Caⓘ CalciteCaCO3
Caⓘ Heulandite Subgroup(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
Caⓘ Piemontite(CaCa)(AlAlMn3+)O[Si2O7][SiO4](OH)
MnManganese
Mnⓘ Piemontite(CaCa)(AlAlMn3+)O[Si2O7][SiO4](OH)
Mnⓘ SpessartineMn32+Al2(SiO4)3

Other Regions, Features and Areas containing this locality

North AmericaContinent
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

Mayo, Evans B. (1932) Two new occurrences of piedmontite in California. American Mineralogist, 17 (6) 238-247 p.240
Mayo, Evans Blakemore (1933), Discovery of Piedmontite in the Sierra Nevada: California Division Mines Report 29: 239-243
Short, Allan M. (1933) A chemical and optical study of piedmontite from Shadow Lake, Madera Co., California. American Mineralogist, 18 (11) 493-500
Alfors, John T. (1964), Piemontite from Shadow Lake: California Division Mines & Geology Mineral Information Service: 17: 210
Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 67, 194, 219, 288, 352.
Pemberton, H. Earl (1983) Minerals of California. Van Nostrand Reinhold Company Inc.
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