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Adobe Canyon group deposits (McGuire et al. deposits; McGuire Holbrook and Springer Lea; Southeast; Mountain View Mine; Mountain View claim; Gray Fox claim), Copper Mountain, Black Wonder Mining District, Stanislaus Co., California, USAi
Regional Level Types
Adobe Canyon group deposits (McGuire et al. deposits; McGuire Holbrook and Springer Lea; Southeast; Mountain View Mine; Mountain View claim; Gray Fox claim)Group of Deposits
Copper MountainMountain
Black Wonder Mining DistrictMining District
Stanislaus Co.County
CaliforniaState
USACountry

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Key
Latitude & Longitude (WGS84):
37° 24' 25'' North , 121° 24' 14'' West
Latitude & Longitude (decimal):
Locality type:
Group of Deposits
Nearest Settlements:
PlacePopulationDistance
Diablo Grande826 (2017)11.0km
Westley603 (2011)24.0km
Patterson21,498 (2017)25.2km
Grayson952 (2011)26.4km
Crows Landing355 (2011)29.4km


A former Cr mine located in secs. 14, 15 & 22, T6S, R5E, MDM, 8.0 km (5.0 miles) W of Copper Mountain, along Adobe Canyon (NE side), near its confluence with Del Puerto Canyon, on private land (fee ownership). Discovered in 1916 and first produced in 1917. Owned by Larry Higuera (100.00%), California (1976). Operated by the West Coast Chrome Co. MRDS database stated accuracy for this location is 100 meters.

Mineralization is hosted in rocks of the Panoche group (dunite). The ore body is lenticular and irregular, strikes N85E, dips 70N at a thickness of 15 meters, width of 30 meters,and a length of 65 meters. The ore bodies are fissure vein-irregular, shear zone- lenticular and disseminated-tabular. The primary mode of origin was magmatic differentiation. Controls for ore emplacement included a shear zone. Primary ore control was lithology and secondary was fracturing. Wall rock alteration is intense (carbonitization and serpentinization of dunite. The deposits occur in an ultramafic body that trends N70W, is 8 miles long and 1.5 miles wide. Local rocks include ultramafic rocks, chiefly Mesozoic, unit 3 (Coast Ranges and Western Klamath Mountains).

Workings included surface and underground openings comprised of a number of short adits and open cuts, now caved (1940).

Production data are found in: Walker, G.W. & A.B. Griggs (1953): 88.

Analytical data results: Low-grade ore contains 25 to 40% Cr2O3. The deposit consists mostly of low-grade ore with some irregular masses of high-grade ore.

Assay data are found in: Hawkes, et al, USGS Bulletin 936-D.

Ore ran 68% chromite with 40.83% Cr2O3. Concentrates ran 60% Cr2O3 with a Cr:Fe ratio of 3.16.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


3 valid minerals.

Detailed Mineral List:

Calcite
Formula: CaCO3
Reference: USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10214195.
Chromite
Formula: Fe2+Cr3+2O4
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; Hawkes, H. E., Jr.; Wells, F. G.; Wheeler, D. P., Jr. (1942) Chromite and quicksilver deposits of the Del Puerto area, Stanislaus County, California. USGS Bulletin 936D
'Fayalite-Forsterite Series'
Reference: USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10214195.
'Serpentine Subgroup'
Formula: D3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
Reference: Hawkes, H. E., Jr.; Wells, F. G.; Wheeler, D. P., Jr. (1942) Chromite and quicksilver deposits of the Del Puerto area, Stanislaus County, California. USGS Bulletin 936D
Uvarovite
Formula: Ca3Cr2(SiO4)3
Reference: USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10214195.

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
Chromite4.BB.05Fe2+Cr3+2O4
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Group 9 - Silicates
Uvarovite9.AD.25Ca3Cr2(SiO4)3
Unclassified Minerals, Rocks, etc.
'Fayalite-Forsterite Series'-
'Serpentine Subgroup'-D3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn

List of minerals arranged by Dana 8th Edition classification

Group 7 - MULTIPLE OXIDES
AB2X4
Chromite7.2.3.3Fe2+Cr3+2O4
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in [6] and >[6] coordination
Uvarovite51.4.3b.3Ca3Cr2(SiO4)3
Unclassified Minerals, Mixtures, etc.
'Fayalite-Forsterite Series'-
'Serpentine Subgroup'-D3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn

List of minerals for each chemical element

HHydrogen
H Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
CCarbon
C CalciteCaCO3
OOxygen
O ChromiteFe2+Cr23+O4
O Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
O CalciteCaCO3
O UvaroviteCa3Cr2(SiO4)3
MgMagnesium
Mg Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
AlAluminium
Al Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
SiSilicon
Si Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
Si UvaroviteCa3Cr2(SiO4)3
CaCalcium
Ca CalciteCaCO3
Ca UvaroviteCa3Cr2(SiO4)3
CrChromium
Cr ChromiteFe2+Cr23+O4
Cr UvaroviteCa3Cr2(SiO4)3
MnManganese
Mn Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
FeIron
Fe ChromiteFe2+Cr23+O4
Fe Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
NiNickel
Ni Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
ZnZinc
Zn Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Bradley, W.W., Huguenin, Emile, Logan, C.A., Tucker, W.B., and Waring, C.A. (1918), Manganese and chromium in California: California Mining Bureau. Bulletin 76, 248 pp.: 204-205.
Hawkes, Herbert Edwin, Jr., Francis Gerritt Wells & Dooley P. Wheeler, Jr. (1942), Chromite and quicksilver deposits of the Del Puerto area, Stanislaus County, California: USGS Bulletin 936-D: 96-97.
Walker, G.W. & A.B. Griggs (1953), Chromite deposits of the southern Coast Ranges of California: California Division of Mines Bulletin 134, part 2, chapter 2: 74, 75, 88, Pl. 11.
Stinson, Melvin Clarence (1975) California Division of Mining and Geology Mineral Property Report (unpublished).
USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10043420 & 10214195.
U.S. Bureau of Mines, Minerals Availability System (MAS) file ID #0060990034.

USGS MRDS Record:10043420

Other Regions, Features and Areas containg this locality

North America
North America PlateTectonic Plate
USA

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