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April Fool claims (April Fool claim; Keegan; Manganese No. 1 and No. 4 claims), Owlshead Mountains, Inyo Co., California, USAi
Regional Level Types
April Fool claims (April Fool claim; Keegan; Manganese No. 1 and No. 4 claims)Group of Claims
Owlshead MountainsMountain Range
Inyo Co.County
CaliforniaState
USACountry

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Key
Latitude & Longitude (WGS84):
35° 52' 50'' North , 116° 46' 4'' West
Latitude & Longitude (decimal):
Locality type:
Group of Claims
Köppen climate type:


A Mn occurrence/group of claims located in sec. 33, T21N, R2E, SBM, 6.0 km (3.7 miles) WSW of Shore Line Butte (Death Valley), on the western margin of Death Valley in the "Owlshead Mountains," (32 miles by road W of Zobriskie, a station on the Tonopah and Tidewater Railway; 1 mile N of the low mountains immediately N of Owl Lake), on National Park Service wilderness land (Death Valley National Park/Death Valley Wilderness). MRDS database stated accuracy for this location is 1,000 meters.

Mineralization is hosted in conglomerate. The ore is low in specific gravity and is a porous, tuffaceous bog Mn ore with a maximum thickness of 18 inches (45 cm) at the April Fool claim. Thin layers of pink, clayey material gives the ore a decided bonded appearance. A sample analysis of the ore was 32.2% Mn and 30.2% insoluble. The Manganese No. 1 claim is ¼ mile SE of the April Fool, and what is thought to be the same Mn-bearing bed is exposed in the bed of a dry wash, with a maximum thickness of 30 inches. Ore analysis was 20.6% Mn and 42.2% insoluble. At the Manganese No. 4 claim, ¼ mile NE of the Manganese No. 1, a well-defined vein of hard, black metallic oxide and scattered boulders of waste rock, cut the conglomerate with a strike of N60W and dipping steeply to the N. The maximum thickness of the vein is 6 feet (2 meters), and is exposed for 25 feet along the strike. Local rocks include Tertiary volcanic flow rocks, unit 16 (Northern Mojave Desert).

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


10 valid minerals.

Detailed Mineral List:

Anglesite
Formula: PbSO4
Reference: California Division of Mines and geology SR125 "Mines and Mineral Resources of Death Valley National Monument, California"
Cerussite
Formula: PbCO3
Reference: California Division of Mines and geology SR125 "Mines and Mineral Resources of Death Valley National Monument, California"
Chalcanthite
Formula: CuSO4 · 5H2O
Reference: California Division of Mines and geology SR125 "Mines and Mineral Resources of Death Valley National Monument, California"
Chrysocolla
Formula: Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Reference: California Division of Mines and geology SR125 "Mines and Mineral Resources of Death Valley National Monument, California"
Coronadite
Formula: Pb(Mn4+6Mn3+2)O16
Reference: California Division of Mines and geology SR125 "Mines and Mineral Resources of Death Valley National Monument, California"
Descloizite
Formula: PbZn(VO4)(OH)
Reference: California Division of Mines and Geology SR125 "Mines and Mineral Resources of Death Valley National Monument, California"
Galena
Formula: PbS
Reference: California Division of Mines and geology SR125 "Mines and Mineral Resources of Death Valley National Monument, California"
Linarite
Formula: PbCu(SO4)(OH)2
Reference: California Division of Mines and geology SR125 "Mines and Mineral Resources of Death Valley National Monument, California"
Vanadinite
Formula: Pb5(VO4)3Cl
Reference: California Division of Mines and geology SR125 "Mines and Mineral Resources of Death Valley National Monument, California"
Wulfenite
Formula: Pb(MoO4)
Reference: California Division of Mines and geology SR125 "Mines and Mineral Resources of Death Valley National Monument, California"

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Galena2.CD.10PbS
Group 4 - Oxides and Hydroxides
Coronadite4.DK.05aPb(Mn4+6Mn3+2)O16
Group 5 - Nitrates and Carbonates
Cerussite5.AB.15PbCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Anglesite7.AD.35PbSO4
Chalcanthite7.CB.20CuSO4 · 5H2O
Linarite7.BC.65PbCu(SO4)(OH)2
Wulfenite7.GA.05Pb(MoO4)
Group 8 - Phosphates, Arsenates and Vanadates
Descloizite8.BH.40PbZn(VO4)(OH)
Vanadinite8.BN.05Pb5(VO4)3Cl
Group 9 - Silicates
Chrysocolla9.ED.20Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmXp, with m:p = 1:1
Galena2.8.1.1PbS
Group 7 - MULTIPLE OXIDES
AB8X16
Coronadite7.9.1.4Pb(Mn4+6Mn3+2)O16
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Cerussite14.1.3.4PbCO3
Group 28 - ANHYDROUS ACID AND NORMAL SULFATES
AXO4
Anglesite28.3.1.3PbSO4
Group 29 - HYDRATED ACID AND NORMAL SULFATES
AXO4·xH2O
Chalcanthite29.6.7.1CuSO4 · 5H2O
Group 30 - ANHYDROUS SULFATES CONTAINING HYDROXYL OR HALOGEN
(AB)2(XO4)Zq
Linarite30.2.3.1PbCu(SO4)(OH)2
Group 41 - ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
(AB)2(XO4)Zq
Descloizite41.5.2.1PbZn(VO4)(OH)
A5(XO4)3Zq
Vanadinite41.8.4.3Pb5(VO4)3Cl
Group 48 - ANHYDROUS MOLYBDATES AND TUNGSTATES
AXO4
Wulfenite48.1.3.1Pb(MoO4)
Group 74 - PHYLLOSILICATES Modulated Layers
Modulated Layers with joined strips
Chrysocolla74.3.2.1Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O

List of minerals for each chemical element

HHydrogen
H ChalcanthiteCuSO4 · 5H2O
H ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
H LinaritePbCu(SO4)(OH)2
H DescloizitePbZn(VO4)(OH)
CCarbon
C CerussitePbCO3
OOxygen
O AnglesitePbSO4
O CerussitePbCO3
O ChalcanthiteCuSO4 · 5H2O
O ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
O CoronaditePb(Mn64+Mn23+)O16
O LinaritePbCu(SO4)(OH)2
O VanadinitePb5(VO4)3Cl
O WulfenitePb(MoO4)
O DescloizitePbZn(VO4)(OH)
AlAluminium
Al ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
SiSilicon
Si ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
SSulfur
S AnglesitePbSO4
S ChalcanthiteCuSO4 · 5H2O
S GalenaPbS
S LinaritePbCu(SO4)(OH)2
ClChlorine
Cl VanadinitePb5(VO4)3Cl
VVanadium
V VanadinitePb5(VO4)3Cl
V DescloizitePbZn(VO4)(OH)
MnManganese
Mn CoronaditePb(Mn64+Mn23+)O16
CuCopper
Cu ChalcanthiteCuSO4 · 5H2O
Cu ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Cu LinaritePbCu(SO4)(OH)2
ZnZinc
Zn DescloizitePbZn(VO4)(OH)
MoMolybdenum
Mo WulfenitePb(MoO4)
PbLead
Pb AnglesitePbSO4
Pb CerussitePbCO3
Pb CoronaditePb(Mn64+Mn23+)O16
Pb GalenaPbS
Pb LinaritePbCu(SO4)(OH)2
Pb VanadinitePb5(VO4)3Cl
Pb WulfenitePb(MoO4)
Pb DescloizitePbZn(VO4)(OH)

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Trask, Parker Davies, Ivan F. Wilson & F.S. Simons (1943), Manganese deposits of California – a summary report: California Division Mines Bulletin 125: 121.
Trask, Parker Davies (1950) Geologic description of the manganese deposits of California. California Division of Mines Bulletin 152, 378 pp.: 80-81.
Norman, L.A. & Richard M. Stewart (1951), Mines and mineral resources of Inyo County, California: California Journal of Mines and Geology (Report 47): 47(1): No. 179, p. 191.
Evans, James R., G.C. Taylor, and J.S. Rapp (1976) Mines and mineral deposits in Death Valley National Monument. California Division Mines and Geology Special Report 125: 1-61.
USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10033467 & 10188212.
U.S. Bureau of Mines, Minerals Availability System (MAS) file ID #0060270703.

Other Databases

USGS MRDS Record:10033467

Other Regions, Features and Areas containing this locality

North America PlateTectonic Plate
USA

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