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Castle Mountain Mine (Castle Mountain project), Hart, Hart District (Castle Mountain District), Castle Mountains, San Bernardino Co., California, USAi
Regional Level Types
Castle Mountain Mine (Castle Mountain project)Mine
Hart- not defined -
Hart District (Castle Mountain District)Mining District
Castle MountainsMountain Range
San Bernardino Co.County
CaliforniaState
USACountry

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Key
Latitude & Longitude (WGS84):
35° 16' 52'' North , 115° 6' 9'' West
Latitude & Longitude (decimal):
Locality type:
Köppen climate type:
Nearest Settlements:
PlacePopulationDistance
Cal-Nev-Ari244 (2011)20.0km
Searchlight539 (2011)26.3km


A lode Au-Ag-Clay occurrence/mine located in sec. 24, T14N, R17E, and in the SW¼SW¼ sec. 18 and in the NW¼NW¼ sec. 19, T14N, R18E, SBM, 0.9 km (0.5 mile) S of Hart (site) (3.7 miles S of Hart Peak; at the S end of the Castle Mountains), on private (patented) land (located claims). Discovered in 1907. Owned & operated by the Viceroy Gold Corporation (Viceroy Resources Corp.) (75%), Canada (1996); and owned by MK Gold Company (25%), Idaho (1996). The Viceroy Gold Corporation is a wholly owned subsidiary of Viceroy Resources Corporation. First produced in 1991. MRDS database stated accuracy for this location is 5,000 meters.

Mineralization is hosted in plutonic rock, latite, basalt, volcanic ash and rhyolite. Ore bodies in the mining area include the Jumbo South, Lesley Ann, Oro Belle, South Extension, Jumbo and Hart (see MAS file #0060710157, Oro Belle Mine. Ore body No. 1 is irregular in a shear zone. Ore body No. 2 is a replacement deposit. The primary mode of origin is hydrothermal. Controls for ore emplacement included NNE-trending structures and permeable rhyolite breccia zones surrounding rhyolite domes. Zones occur along fractures. 6 individual deposits are associated with rhyolite dome, dome complexes, and silicifeid fracture zones. Cut by zones of broken, clay-rich rock. Mineralization is related to the permeability of the host rocks. The water table is at 550 feet with all reserves in the oxidized zone above that depth. Primary ore control was fracturing. Gold averages 10 microns in size but ranges from 1 to 2,000 microns. Silicified and mineralized arcuate fractures suggest that the deposits lie near the center of a small caldera or collapsed volcano. One deposit, buried by as much as 300 feet of gravel, was discovered by geological interpretation (Linder, 1989). Local alteration is strong (silicification, argillization, adularia). Wallrock alteration is unknown. Local rocks include Tertiary volcanic flow rocks, unit 16 (Northern Mojave Desert).

Workings include surface openings comprised of an open pit. Plant includes leach operation. The milling methods include heap leaching-agglomerate-carbon column-electrowin.

Production data: Year: 1993 (fiscal year 1993): Au: 104,105 Troy ounces(3,238,028 grams)/year. Ag: 24,391 Troy ounces (758,645 grams).

Year: 1994 (fiscal year 1994): Au: 150,907 Troy ounces (4,693,733 grams)/year. Ag: 31,812 Troy ounces(989,464 grams)/year.

Year: 1995 (fiscal year 1995): Au: 168,190 Troy ounces(5,262,398 grams)/year. Ag: 40,466 Troy ounces(1,258,633 grams)/year.

Year: 1996 (total 1996): Au 122,192 Troy ounces(3,800,597 grams)/year.

During the 1920's and 1930's there was major production of high-grade clay from hydrothermal alteration zones in and around the gold deposits. The clay was used to produce high-quality clay products such as commodes, sinks & floor tile.

Reserve/resource data: Type: in-situ (1997): demonstrated: 17,962,000 metric tons of ore at 1.23 grams/metric tons. Proven reserves (date unknown): Lesley Ann ore body depleted, others were being mined. Production was based on 11,400 short tons/day. Ore processed at 360 days per year.

Analytical data results: Au:Ag = 1:2 overall but 2:1 in the core deposit.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


5 valid minerals.

Detailed Mineral List:

Calcite
Formula: CaCO3
Reference: Richard C. Capps & John A. Moore () Castle Mountains Geology and Gold Mineralization San Bernardino County, California and Clark County, Nevada
Gold
Formula: Au
Reference: Richard C. Capps & John A. Moore () Castle Mountains Geology and Gold Mineralization San Bernardino County, California and Clark County, Nevada
'K Feldspar'
Reference: Richard C. Capps & John A. Moore () Castle Mountains Geology and Gold Mineralization San Bernardino County, California and Clark County, Nevada
'K Feldspar var: Adularia'
Formula: KAlSi3O8
Reference: Richard C. Capps & John A. Moore () Castle Mountains Geology and Gold Mineralization San Bernardino County, California and Clark County, Nevada
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Reference: Richard C. Capps & John A. Moore () Castle Mountains Geology and Gold Mineralization San Bernardino County, California and Clark County, Nevada
Muscovite var: Sericite
Formula: KAl2(AlSi3O10)(OH)2
Reference: Richard C. Capps & John A. Moore () Castle Mountains Geology and Gold Mineralization San Bernardino County, California and Clark County, Nevada
Pyrite
Formula: FeS2
Reference: Richard C. Capps & John A. Moore () Castle Mountains Geology and Gold Mineralization San Bernardino County, California and Clark County, Nevada
Quartz
Formula: SiO2
Reference: Richard C. Capps & John A. Moore () Castle Mountains Geology and Gold Mineralization San Bernardino County, California and Clark County, Nevada

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Gold1.AA.05Au
Group 2 - Sulphides and Sulfosalts
Pyrite2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
Quartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Group 9 - Silicates
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
var: Sericite9.EC.15KAl2(AlSi3O10)(OH)2
Unclassified Minerals, Rocks, etc.
'K Feldspar'-
'var: Adularia'-KAlSi3O8

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
AmBnXp, with (m+n):p = 1:2
Pyrite2.12.1.1FeS2
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Muscovite71.2.2a.1KAl2(AlSi3O10)(OH)2
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Mixtures, etc.
'K Feldspar'-
'var: Adularia'-KAlSi3O8
Muscovite
var: Sericite
-KAl2(AlSi3O10)(OH)2

List of minerals for each chemical element

HHydrogen
H Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
H MuscoviteKAl2(AlSi3O10)(OH)2
CCarbon
C CalciteCaCO3
OOxygen
O QuartzSiO2
O CalciteCaCO3
O Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
O K Feldspar (var: Adularia)KAlSi3O8
O MuscoviteKAl2(AlSi3O10)(OH)2
AlAluminium
Al Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
Al K Feldspar (var: Adularia)KAlSi3O8
Al MuscoviteKAl2(AlSi3O10)(OH)2
SiSilicon
Si QuartzSiO2
Si Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
Si K Feldspar (var: Adularia)KAlSi3O8
Si MuscoviteKAl2(AlSi3O10)(OH)2
SSulfur
S PyriteFeS2
KPotassium
K Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
K K Feldspar (var: Adularia)KAlSi3O8
K MuscoviteKAl2(AlSi3O10)(OH)2
CaCalcium
Ca CalciteCaCO3
FeIron
Fe PyriteFeS2
AuGold
Au GoldAu

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Wright, L.A., et al (1953), Mines and mineral resources of San Bernardino County, California: California Journal of Mines and Geology, California Division of Mines (Report 49): 49(1-2): 51-52.
Southern Pacific Company (1964b) Minerals for Industry, Summary of Geological Survey 1955 - 1961: Vol III - 242 pp., Southern California, Southern Pacific Co., San Francisco, CA 94105: 41.
Engineering and Mining Journal (1988), June: 44.
Viceroy Resources Corporation (1988), Plan of Operations, Castle Mountain Project, Hart Mining District, San Bernardino County, Califonria, Bureau of Land Management Needles Resources Area Office, Needles, California, 54 pp.
Linder, Harold (1989), Hart Mining District, San Bernardino County, California, California Geology: 42(6)(June, 1989): 134-140, 143.
Capps, Richard C. & John A. Moore (1990), Geologic Setting of Mid-Miocene Gold Deposits in the Castle Mountains, San Bernardino County, California and Clark County, Nevada: in: Raines, G.L., Lisle, R.E., et al, editors, Geology and Ore Deposits pf the Great Basin Symposium, Reno, Nevada, 1990 proceedings: 1195-1219.
Castle Mountain Project (1990), San Bernardino County, California: Final Environmental Impact Statement (EIS)/Environmental Impact Report (EIR) #890053 (August, 1990).
U.S. Bureau of Mines (1990), Mineral Investigation of the East Mojave National Scenic Area, San Bernardino County, California: U.S. Bureau of Mines Open-File Report MLA 6-90: Volume 1, Table 2: No. 329, p. 132.
Viceroy Resources Corporation (1990), Annual Report for 1989, 16 pp.
Viceroy Resources Corporation (1990), Draft Environmental Impact Statement for the Castle Mountain Project.
Mining Record, The (1991): (04-24-1991).
Viceroy Resources Corporation (1991), Annual Report for 1990, 12 pp.
Burnett, John, L. (1993), TheMineral Industry of California - 1992, California Geology: 46(3) (May-June): 74-75 (Castle Mountain Mine/Castle Mountain project).
Randol Mining Directory (1994-1995), U.S. Mines and Mining Companies: 223-224.
Mining Record, The (1995): Viceroy’s castle Mountain to Produce 160,000 ounces: 106(11) (3-15-95): 1
Mining Record, The (1995): Viceroy Develops Long-Term Mine Plan for Castle Mountain (7-19-95): 5.
Mining Record, The (1995): Viceroy Increases Working Capital to $40.4 Million (8-2-95): 3, 4.
American Mines Handbook (1996): 239.
MK Gold Company (1996) Annual Report & Form 10-K: 14 (Castle Mountain Mine).
Randol Mining Directory (1996-1997), U.S. Mines and Mining Companies: 152-153.
Viceroy Resources Corporation (1996), 1996 Annual Report "A" - Mine Property Cover: 10, 22.
Viceroy Resources Corporation (1996), 1996 Annual Report “B” – Gold Pour and Bar Cover: 10.
Capps, Richard C. & John A. Moore (1997), Castle Mountains Geology and Gold Mineralization, San Bernardino County, California and Clark County, Nevada, map 108, Nevada Bureau of Mines and Geology, Mackay School of Mines, University of Nevada, Reno.
Skillings Mining Review (1997): 86(17) (April 26, 1997): 9.
USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10085019 & 10164473.
U.S. Bureau of Mines, Minerals Availability System (MAS) file #0060711074.

Other Databases

USGS MRDS Record:10085019

Other Regions, Features and Areas containing this locality

North America PlateTectonic Plate

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