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Antimony Peak deposit (San Emigdio Mine; San Emigdio-Antimony Peak; Antimony Peak Mine), Antimony Peak, San Emigdio Mts, Kern Co., California, USA

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Latitude & Longitude (WGS84): 34° 52' 50'' North , 119° 7' 0'' West
Latitude & Longitude (decimal): 34.88056,-119.11667
GeoHash:G#: 9q5q3mvcu
Locality type:Deposit
Köppen climate type:Csb : Warm-summer Mediterranean climate


A former Sb-Ag occurrence/mine located in secs. 9 & 10, T9N, R21W, SBM, on the N & E slopes of Antimony Peak, 12 miles SW of Sunset and 5 miles NW of Cuddy Valley, about 8 miles NW of Frazier Park, on private (patented) land within a National Forest area. Discovered in 1853. First produced in 1888. Owned by Tenneco Oil Exploration and Production Company (100%), Arizona (1982). MRDS database stated accuracy for this location is 10 meters. Mined in 1895, caved by 1912 and extensive work done in 1915.

Mineralization is a vein deposit hosted in granodiorite. The ore body is podiform or reniform shaped at a thickness of 4.7 meters, a width of 45.72 meters and a length of 762 meters, striking N40W and dipping 55S. The depth-to-top is 1 meter. Ore body No. 1 is a shear zone and tabular. Ore body No. 2 is lenticular and ore body No. 3 is irregular. The primary mode of origin was hydrothermal activity. Primary ore control was faulting. Wallrock alteration is slight. The vein can be traced for 4,000 feet. Local rocks include Mesozoic granitic rocks, unit 3 (Sierra Nevada, Death Valley area, Northern Mojave Desert and Transverse Ranges).

Local geologic structures include the Antimony Peak Fault (the mine is on the SE end of this steep thrust fault); and the Antimony Peak syncline. Regional features include the San Andreas Fault.

Workings include underground openings with a length of 1,222 meters and an overall depth of 122 meters, and comprised of 1 shaft and 2 adits (1983).

Production data are found in: White, D.E. (1962).

Production statistics: Year: 1882: 54 metric tons of ore. Year: 1911: 227 metric tons of ore.

Reserves and resources: Type: in-situ (estimate year = 1983): inferred: 221,000 metric tons of ore; demonstrated: 156,000 metric tons of ore; indicated: 156,000 metric tons of ore. Total resources: 377,000 metric tons of ore. Sb @ 2.7299 weight percent (1983). (see MRDS file #10139639)

Analytical data results: Cu: 0.02%; Pb: 0.05%; Au: trace; Ag - 0.18 ounce/ton; results: average Sb: 2.5% (53 foot length); 4.8% (6.1 foot width).

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


9 valid minerals.

Detailed Mineral List:

Antimony
Formula: Sb
Reference: Pemberton, H. Earl (1972) Antimony Peak: a rerun of a field trip 110 years later. Mineralogical Record: 3: 80; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 50.
Cervantite
Formula: Sb3+Sb5+O4
Reference: Palache, Charles, Harry Berman & Clifford Frondel (1944), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Volume I: John Wiley and Sons, Inc., New York. 7th edition, revised and enlarged, 834pp.: 596.
Gypsum
Formula: CaSO4 · 2H2O
Description: Occurs in thin seams with poorly- to well-formed crystals.
Reference: Blake, Wm. P. (1856), Reports of explorations and surveys to ascertain the most practical and economical route for a railroad from the Mississippi River to the Pacific Ocean: 33rd. Congress, 2nd. Session, House Doc. 91: Vol. 5, part 2, geological report: 308; Pemberton, H. Earl (1972) Antimony Peak: a rerun of a field trip 110 years later. Mineralogical Record: 3: 78-81; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 286.
Kermesite
Formula: Sb2S2O
Pyrite
Formula: FeS2
Reference: USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10107763.
Senarmontite
Formula: Sb2O3
Habit: Micro-octahedra; parallel growth at times.
Description: Occurs in fissures of massive stibnite.
Reference: Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 185.
'Stibiconite'
Formula: Sb3+Sb5+2O6(OH)
Colour: Yellow to orange
Description: Occurs massive and as pseudomorphs after stibnite.
Reference: Pemberton, H. Earl (1972) Antimony Peak: a rerun of a field trip 110 years later. Mineralogical Record: 3: 80; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 185.
Stibnite
Formula: Sb2S3
Reference: Blake, Wm. P. (1858), Report of a geological reconnaissance in California 370 pp., New York: 282; Jermain, G.D. & S. Ricker (1949), Investigation of Antimony Peak, Kern County, California: US Bureau Mines Report of Investigation 4505, 5 pp.: 1; Troxel, B.W. and Morton, P.K. (1962), Mines and Mineral Resources of Kern County, California: California Division of Mines and Geology County Report 1, 370p.: 56, 59; Pemberton, H. Earl (1972) Antimony Peak: a rerun of a field trip 110 years later. Mineralogical Record: 3: 80; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 185.
Sulphur
Formula: S8
Description: Occurs as small, euhedral crystals.
Reference: Pemberton, H. Earl (1972) Antimony Peak: a rerun of a field trip 110 years later. Mineralogical Record: 3: 81; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 52.
Valentinite
Formula: Sb2O3
Habit: Prismatic; fan-shaped aggregates of thin plates.
Colour: White, cream, pale yellow
Description: Occurs as prismatic crystals, fan-shaped aggregates of thin plates and also as massive material.
Reference: Pemberton, H. Earl (1972) Antimony Peak: a rerun of a field trip 110 years later. Mineralogical Record: 3: 78-81; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 185.

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
'Antimony'1.CA.05Sb
'Sulphur'1.CC.05S8
Group 2 - Sulphides and Sulfosalts
'Kermesite'2.FD.05Sb2S2O
'Pyrite'2.EB.05aFeS2
'Stibnite'2.DB.05Sb2S3
Group 4 - Oxides and Hydroxides
'Cervantite'4.DE.30Sb3+Sb5+O4
'Senarmontite'4.CB.50Sb2O3
'Stibiconite'4.DH.20Sb3+Sb5+2O6(OH)
'Valentinite'4.CB.55Sb2O3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
'Gypsum'7.CD.40CaSO4 · 2H2O

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Semi-metals and non-metals
Antimony1.3.1.2Sb
Sulphur1.3.5.1S8
Group 2 - SULFIDES
AmBnXp, with (m+n):p = 2:3
Stibnite2.11.2.1Sb2S3
AmBnXp, with (m+n):p = 1:2
Pyrite2.12.1.1FeS2
Oxysulfides
Kermesite2.13.1.1Sb2S2O
Group 4 - SIMPLE OXIDES
A2X3
Senarmontite4.3.9.2Sb2O3
Valentinite4.3.11.1Sb2O3
AX2
Cervantite4.4.16.1Sb3+Sb5+O4
Group 29 - HYDRATED ACID AND NORMAL SULFATES
AXO4·xH2O
Gypsum29.6.3.1CaSO4 · 2H2O
Group 44 - ANTIMONATES
A2X2O6(O,OH,F)
'Stibiconite'44.1.1.1Sb3+Sb5+2O6(OH)

List of minerals for each chemical element

HHydrogen
H GypsumCaSO4 · 2H2O
H StibiconiteSb3+Sb25+O6(OH)
OOxygen
O CervantiteSb3+Sb5+O4
O GypsumCaSO4 · 2H2O
O KermesiteSb2S2O
O SenarmontiteSb2O3
O StibiconiteSb3+Sb25+O6(OH)
O ValentiniteSb2O3
SSulfur
S GypsumCaSO4 · 2H2O
S KermesiteSb2S2O
S PyriteFeS2
S StibniteSb2S3
S SulphurS8
CaCalcium
Ca GypsumCaSO4 · 2H2O
FeIron
Fe PyriteFeS2
SbAntimony
Sb AntimonySb
Sb CervantiteSb3+Sb5+O4
Sb KermesiteSb2S2O
Sb SenarmontiteSb2O3
Sb StibiconiteSb3+Sb25+O6(OH)
Sb StibniteSb2S3
Sb ValentiniteSb2O3

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Quaternary
0 - 2.588 Ma



ID: 3185749
Cenozoic sedimentary rocks

Age: Pleistocene (0 - 2.588 Ma)

Lithology: Sedimentary rocks

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Tertiary - Lopingian
2.588 - 259.1 Ma



ID: 3019707
Mesozoic granitic rocks, unit 3 (Sierra Nevada, Death Valley area, Northern Mojave Desert and Transverse Ranges)

Age: Phanerozoic (2.588 - 259.1 Ma)

Stratigraphic Name: Atolia Quartz Monzonite; Coxcomb Granodiorite; Holcomb Quartz Monzonite; Lar Quartz Diorite; Liebre Quartz Monzonite; Mount Pinos Granite; Palms Granite; Sands Granite; Teutonia Quartz Monzonite; White Tank Quartz Monzonite; Vermont Quartz Diorite; Cadiz Valley Batholith; Barcroft Granodiorite; Bass Lake Tonalite; Big Baldy Granite; Boundary Peak Granite; Bridalveil Granite; Burnside Lake Adamellite; Cabin Granodiorite; Cactus Point Granite; Carson Pass Tonalite; Cathedral Peak Granite; Clover Creek Granodiorite; Cottonwood Adamellite; Cow Creek Granodiorite; Dinkey Creek Granodiorite; Ebbetts Pass Granodiorite; El Capitan Granite; Evolution Basin Alaskite; Giant Forest Granodiorite; Half Dome Quartz Monzonite; Hunter Mountain Quartz Monzonite; Inconsolable Granodiorite; Isabella Granodiorite; Johnson Granite Porphyry; Knowles Granodiorite; Lake Edison Granodiorite; Lamarck Granodiorite; Leaning Tower Quartz Monzonite; Lebec Quartz Monzonite; Leidy Adamellite; Lodgepole Granite; Lookout Peak Tonalite; McAfee Adamellite; Mitchell Peak Granodiorite; Mono Creek Granite; Mount Clark Granite; Mount Givens Granodiorite; Pear Lake Quartz Monzonite; Paradise Granodiorite; Pellesier Granite; Pohono Granodiorite; Potwisha Quartz Diorite; Round Valley Peak Granodiorite; Sacatar Quartz Diorite; Sage Hen Adamellite; Sentinel Granodiorite; Stanislaus Meadow Adamellite; Taft Granite; Tamarack Leuco-Adamellite; Tejon Lookout Granite; Tinemaha Granodiorite; Tungsten Hills Quartz Monzonite; Ward Mountain Trondhjemite; Weaver Lake Quartz Monzonite; Wheeler Crest Quartz Monzonite; Whitney Granodiorite. Hunter Mountain Batholith; Inyo Batholith; Sierra Nevada Batholith. Bald Rock Pluton; Bucks Lake Pluton; Bullfrog Pluton; Cartridge Pass Pluton; Cascade Pluton; Dragon Pluton; Grizzly Pluton; Independence Pluton; Merrimac Pluton; Paiute Monument Pluton; Papoose Flat Pluton; Pat Keyes Pluton; Sage Hen Flat Pluton; Santa Rita Flat Pluton; Swedes Flat Pluton; Tuolumne Intrusive Suite; John Muir Intrusive Suite; Shaver Intrusive Suite; Palisade Crest Intrusive Suite; Scheelite Intrusive Suite; Fine Gold Intrusive Suite; Soldier Pass Intrusive Suite; Mount Whitney Intrusive Suite

Description: Mesozoic granite, quartz monzonite, granodiorite, and quartz diorite

Comments: Sierra Nevada, Death Valley area, Transverse Ranges and Mojave Desert. Primarily granodiorite, tonalite, quartz monzonite, and granite ranging in age from Late Triassic to Late Cretaceous. Includes some rocks as old as Permian and possibly a few as young as Tertiary. Three main periods of emplacement (Triassic, Jurassic, and Cretaceous); wide variety of rock types Original map source: Saucedo, G.J., Bedford, D.R., Raines, G.L., Miller, R.J., and Wentworth, C.M., 2000, GIS Data for the Geologic Map of California, California Department of Conservation, Division of Mines and Geology, CD-ROM 2000-07, scale 1:750,000.

Lithology: Major:{granodiorite}, Minor:{granite,tonalite,quartz diorite,quartz monzonite}, Incidental:{diorite, quartz syenite, quartz monzodiorite, gabbro, trondhjemite, monzonite, monzodiorite, pegmatite, alaskite, aplite}

Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052. [133]

Early Cretaceous
100.5 - 145 Ma



ID: 2652325
Quartz diorite of Antimony Peak

Age: Early Cretaceous (100.5 - 145 Ma)

Description: Gray, coarse-grained, hypidi­omorphic, equigranular, massive to weakly foliated quartz diorite and tonalite. Aver­age mode contains 60 percent plagioclase (An38), 1 percent microcline, 10–20 percent quartz, 13 percent hornblende, 8 percent biotite (commonly altered to chlorite), and traces of epidote, apatite, garnet, and opaque minerals. 40Ar/39Ar age on hornblende is 99.8±0.6 Ma (latest Early Cretaceous; Kellogg and Miggins, 2002). 87Sr/86Sr of 0.70337 indicates a mafic oceanic source (Ross, 1989). Includes small areas of quartz diorite mapped adjacent to monzogranite of Brush Mountain (Dibblee, 1973; unpub. Data, 2001)

Reference: Kellogg, K.S., S.A. Minor, P.M. Cossette. Geologic Map of the Eastern Three-Quarters of the Cuyama 30’ x 60’ Quadrangle, California. U.S. Geological Survey Scientific Investigations Map 3002. [102]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Blake, Wm. P. (1856), Reports of explorations and surveys to ascertain the most practical and economical route for a railroad from the Mississippi River to the Pacific Ocean: 33rd. Congress, 2nd. Session, House Doc. 91: Vol. 5, part 2, geological report: 308.
Blake, Wm. P. (1858), Report of a geological reconnaissance in California 370 pp., New York: 282.
Bowers, Stephen (1888), Ventura County, California: California Mining Bureau. (Report 8): 8: 680-681.
Jermain, G.D. (1941), Report on the Antimony Peak Project, U.S. Bureau of mines Strategic Minerals projects section (unpublished report): 39.
Palache, Charles, Harry Berman & Clifford Frondel (1944), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Volume I: Elements, Sulfides, Sulfosalts, Oxides. John Wiley and Sons, Inc., New York. 7th edition, revised and enlarged, 834pp.: 596.
Engel, H. L. (1949), Dense-Medium and Flotation Tests on an Antimony Ore from California: U. S. Bureau of Mines, Report of Investigation 4616, 6 pp.
Jermain, G.D. & S. Ricker (1949), Investigation of Antimony Peak, Kern County, California: US Bureau Mines Report of Investigation 4505, 5 pp.: 1.
Anue, Q.A. (1957), Antimony in California and Nevada, U.S. Bureau of Mines report (unpublished): 65.
Troxel, B.W. and Morton, P.K. (1962), Mines and Mineral Resources of Kern County, California: California Division of Mines and Geology County Report 1, 370p.: 51-52, 56, 59.
White, D. E. (1962), Antimony of the United States, USGS MR-20.
Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 77, 210.
Pemberton, H. Earl (1972) Antimony Peak: a rerun of a field trip 110 years later. Mineralogical Record: 3(2): 78-81.
Kuizon, L. (1981), Mineral Resources of the Antimony RARE II area, Kern and Ventura Counties, California, U.S. Bureau of Mines file report: 14-27.
Plunkert, P.A. (1981), Antimony in Minerals Yearbook, volume 1: 93-101.
Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 50, 52, 127, 185, 286.
USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10107763, 10110501 & 10139639.
U.S. Bureau of Mines, Minerals Availability System (MAS) file #0060290012.
White, D. E. and Myers, W. H., Report on the Antimony Peak area (unpublished USGS file data).


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