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Chance Mine, Casa Diablo Mountain, Chidago Mining District, Benton Range, Mono Co., California, USAi
Regional Level Types
Chance MineMine
Casa Diablo MountainMountain
Chidago Mining DistrictMining District
Benton RangeMountain Range
Mono Co.County
CaliforniaState
USACountry

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Key
Latitude & Longitude (WGS84):
37° 37' 48'' North , 118° 31' 35'' West
Latitude & Longitude (decimal):
Locality type:
Nearest Settlements:
PlacePopulationDistance
Sunny Slopes182 (2017)14.8km
Swall Meadows220 (2017)17.2km
Benton280 (2011)21.5km
Mesa251 (2011)23.5km
Round Valley435 (2011)24.0km


A mine located in the NE¼SW¼ (SW¼NE¼NW¼SE¼ according to the MRDS database file) sec. 2, T4S, R31E, MDM, 6.1 km (3.8 miles) NNE of Casa Diablo Mountain (coordinates of record) and 8.3 km (5.2 miles) SSE of Banner Ridge (coordinates of record), just N of Chidago Canyon, on National Forest land. A new claim was located in 1997 by Robert Griffis and Graham Sutton under claim CAMC271576. MRDS database stated accuracy for this location is 1,000 meters.

Mineralization is fault bounded, and consisted of pods of galena encapsulated in a quartz vein within decomposed granite. Some galena pods were altered with zones of cerussite forming on the margins, and occasionally, the interiors altered to a combination of linarite and caledonite. At the margins of the mineralized zone, free-standing linarite crystals were found associated with quartz. The ore body strikes E and dips 65S. Local rocks include Mesozoic granitic rocks, unit 3 (Sierra Nevada, Death Valley area, Northern Mojave Desert and Transverse Ranges).

Workings include surface and underground openings. The mine consists of a haulage level and glory hole which connects to an upper workings level. The haulage adit extends well beyond the zone of mineralization.

Mining for specimens was undertaken by John Seibel, Steve Perry and Robert Griffis (the claim owner) during the period of 2000 to 2004. During this effort, one mineralized zone was discovered in the floor of the haulage level, and several specimens were extracted, with only one outstanding specimen found. Although additional exploration was conducted, no traces of mineralization remains. The claim was abandoned in August 2009.

Rinehart and Ross (1956) reported mineralization in a quartz vein, apparently an extension of the Beckman vein (exploited in the Beckman Mine just to the north), which strikes east and dips 65 degrees south in a shear zone in granodiorite. Ore minerals were silver-bearing galena, anglesite, chalcopyrite, azurite, malachite and gold-bearing pyrite. Workings in 1956 consisted on several shallow pits along outcrop and a 100-foot adit that cuts vein 50 feet below outcrop. No production was reported.

Pemberton (1983) on p. 338 reports Stolzite "in altered galena from the Chance No. 4 claim in the Chidago District (sec. 2, T4S, R32E, MDM)."

Based on the research of Bob Griffis, the R32E notation clearly is a typographical error. Additionally, although there were several contiguous claims placed across the area surrounding the Chance Mine, the Pemberton (1983) reference to a specific Chance No. 4 claim implies more accuracy than is warranted, and this specific claim does not specifically coincide with the actual Chance Mine workings.

Select Mineral List Type

Standard Detailed Gallery Strunz Dana Chemical Elements

Mineral List


12 valid minerals.

Detailed Mineral List:

Anglesite
Formula: PbSO4
Caledonite
Formula: Pb5Cu2(SO4)3(CO3)(OH)6
Reference: personal communication with mine owner, Bob Griffis
Galena
Formula: PbS
Reference: Robert Griffis collection
Goethite
Formula: α-Fe3+O(OH)
Reference: Bob Griffs
Gold
Formula: Au
Reference: personal communication with mine owner, Bob Griffis
Linarite
Formula: PbCu(SO4)(OH)2
Reference: Rocks & Minerals 81:208-213
Malachite
Formula: Cu2(CO3)(OH)2
Reference: USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10007214.
Mottramite
Formula: PbCu(VO4)(OH)
Pyrite
Formula: FeS2
Reference: USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10007214.
Quartz
Formula: SiO2
Reference: Bob Griffs
Stolzite
Formula: Pb(WO4)
Reference: Pemberton, H. Earl (1983): Minerals of California. Van Nostrand Reinholt Press edition 1983. 591p. (p.338)
Vanadinite
Formula: Pb5(VO4)3Cl
Reference: Daniel Chaplin Collection
Vanadinite var. Arsenic-bearing Vanadinite ?
Formula: Pb5[(V,As)O4]3Cl
Reference: Daniel Chaplin Collection

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Gold1.AA.05Au
Group 2 - Sulphides and Sulfosalts
Galena2.CD.10PbS
Pyrite2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
Goethite4.00.α-Fe3+O(OH)
Quartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Malachite5.BA.10Cu2(CO3)(OH)2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Anglesite7.AD.35PbSO4
Caledonite7.BC.50Pb5Cu2(SO4)3(CO3)(OH)6
Linarite7.BC.65PbCu(SO4)(OH)2
Stolzite7.GA.05Pb(WO4)
Group 8 - Phosphates, Arsenates and Vanadates
Mottramite8.BH.40PbCu(VO4)(OH)
Vanadinite8.BN.05Pb5(VO4)3Cl
var. Arsenic-bearing Vanadinite ?8.BN.05Pb5[(V,As)O4]3Cl

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Metals, other than the Platinum Group
Gold1.1.1.1Au
Group 2 - SULFIDES
AmXp, with m:p = 1:1
Galena2.8.1.1PbS
AmBnXp, with (m+n):p = 1:2
Pyrite2.12.1.1FeS2
Group 6 - HYDROXIDES AND OXIDES CONTAINING HYDROXYL
XO(OH)
Goethite6.1.1.2α-Fe3+O(OH)
Group 16a - ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
Malachite16a.3.1.1Cu2(CO3)(OH)2
Group 28 - ANHYDROUS ACID AND NORMAL SULFATES
AXO4
Anglesite28.3.1.3PbSO4
Group 30 - ANHYDROUS SULFATES CONTAINING HYDROXYL OR HALOGEN
(AB)2(XO4)Zq
Linarite30.2.3.1PbCu(SO4)(OH)2
Group 32 - COMPOUND SULFATES
Anhydrous Compound Sulfates containing Hydroxyl or Halogen
Caledonite32.3.2.1Pb5Cu2(SO4)3(CO3)(OH)6
Group 41 - ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
(AB)2(XO4)Zq
Mottramite41.5.2.2PbCu(VO4)(OH)
A5(XO4)3Zq
Vanadinite41.8.4.3Pb5(VO4)3Cl
Group 48 - ANHYDROUS MOLYBDATES AND TUNGSTATES
AXO4
Stolzite48.1.3.2Pb(WO4)
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Mixtures, etc.
Vanadinite
var. Arsenic-bearing Vanadinite ?
-Pb5[(V,As)O4]3Cl

List of minerals for each chemical element

HHydrogen
H LinaritePbCu(SO4)(OH)2
H CaledonitePb5Cu2(SO4)3(CO3)(OH)6
H MottramitePbCu(VO4)(OH)
H Goethiteα-Fe3+O(OH)
H MalachiteCu2(CO3)(OH)2
CCarbon
C CaledonitePb5Cu2(SO4)3(CO3)(OH)6
C MalachiteCu2(CO3)(OH)2
OOxygen
O LinaritePbCu(SO4)(OH)2
O AnglesitePbSO4
O CaledonitePb5Cu2(SO4)3(CO3)(OH)6
O MottramitePbCu(VO4)(OH)
O QuartzSiO2
O Goethiteα-Fe3+O(OH)
O StolzitePb(WO4)
O MalachiteCu2(CO3)(OH)2
O VanadinitePb5(VO4)3Cl
O Vanadinite var. Arsenic-bearing VanadinitePb5[(V,As)O4]3Cl
SiSilicon
Si QuartzSiO2
SSulfur
S LinaritePbCu(SO4)(OH)2
S AnglesitePbSO4
S CaledonitePb5Cu2(SO4)3(CO3)(OH)6
S GalenaPbS
S PyriteFeS2
ClChlorine
Cl VanadinitePb5(VO4)3Cl
Cl Vanadinite var. Arsenic-bearing VanadinitePb5[(V,As)O4]3Cl
VVanadium
V MottramitePbCu(VO4)(OH)
V VanadinitePb5(VO4)3Cl
V Vanadinite var. Arsenic-bearing VanadinitePb5[(V,As)O4]3Cl
FeIron
Fe Goethiteα-Fe3+O(OH)
Fe PyriteFeS2
CuCopper
Cu LinaritePbCu(SO4)(OH)2
Cu CaledonitePb5Cu2(SO4)3(CO3)(OH)6
Cu MottramitePbCu(VO4)(OH)
Cu MalachiteCu2(CO3)(OH)2
AsArsenic
As Vanadinite var. Arsenic-bearing VanadinitePb5[(V,As)O4]3Cl
WTungsten
W StolzitePb(WO4)
AuGold
Au GoldAu
PbLead
Pb LinaritePbCu(SO4)(OH)2
Pb AnglesitePbSO4
Pb CaledonitePb5Cu2(SO4)3(CO3)(OH)6
Pb GalenaPbS
Pb MottramitePbCu(VO4)(OH)
Pb StolzitePb(WO4)
Pb VanadinitePb5(VO4)3Cl
Pb Vanadinite var. Arsenic-bearing VanadinitePb5[(V,As)O4]3Cl

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Rinehart, Charles Dean & Donald C. Ross (1956), Economic geology of the Casa Diablo Mountain quadrangle, California: California Division Mines Special Report 48: 9.
Pemberton, H. Earl (1983): Minerals of California. Van Nostrand Reinholt Press edition 1983. 591p.: 338.
USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10007214 & 10140428.
Griffis, Bob (2011), Mine owner, personal files.
U.S. Bureau of Mines, Minerals Availability System (MAS) file ID #0060510348.

Other Databases

Link to USGS MRDS:10140428

Other Regions, Features and Areas containing this locality

North America PlateTectonic Plate
USA

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