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New Idria District, Diablo Range, San Benito Co., California, USA

A Hg-Cr-gemstone mining area 15 miles long by 9 miles wide, in the southern portion of the Diablo Range.

The deposits are within or along the border of the New Idria serpentine body (serpentinite). The principal ore mineral is cinnabar, with minor amounts of metacinnabar and native mercury. The minerals occur along cracks and veins in Franciscan and Panoche sedimentary rocks that have been hardened by hydrothermal action and in silia-carbonate rock, the hydrothermal alteration of serpentine.

References

Becker, George F. (1888), Geology of the quicksilver deposits of the Pacific slope: USGS Monograph 13, atlas: 291-309.

Eckel, Edwin Butt & W.B. Myers (1946), Quicksilver deposits of the New Idria district, San Benito and Fresno Counties, California: California Division Mines Report 42: 81-124.

Dickson, F.W. & G. Tunell (1959), Stability relations of cinnabar and metacinnabar: American Mineralogist: 44: 483.

Linn, R.K. and Dietrich, W.F. (1961) Mining and furnacing mercury ore at the New Idria mine, San Benito County, California. US Bureau of Mines Information Circular 8033, 35 pp.

Tunell, G. (1964) Chemical processes in the formation of mercury ores and ores of mercury and antimony. Geochimica et Cosmochimica Acta: 28: 1023.

Mumpton, F.A. Jaffe, H.W., and Thompson, C.S. (1965) Coalingite, a new mineral from the New Idria serpentinite, Fresno and San Benito counties, California. American Mineralogist: 50: 1893-1913.

Davis, F.F. and E.H. Bailey (1966) Mercury. California Division Mines and Geol. Bulletin 191: 252.

Linn, R.K. (1968) New Idria mining district. In: Ore Deposits of the United States, 1933-1967. The Graton-Sales volume, New York, A.I.M.E.: 1633-1649.

Luce, R.W. (1971) Identification of serpentine varieties by infrared absorption. USGS Professional Paper 750-B: 199-201.

Cisneros, S.L. (1977): Artinite from San Benito County. Mineralogical Record. 8: 457-460

Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 120-121, 146.

External Links

http://www.blm.gov/pgdata/etc/medialib/blm/ca/pdf/hollister.Par.89047.File.dat/CCMA_Closure_Map.pdf

Mineral List

Mineral list contains entries from the region specified including sub-localities
Actinolite
Aegirine
Agardite-(La)
Agardite-(Y)
Albite
'Almandine-Pyrope Series'
Analcime
Anatase
Andradite
var: Demantoid
var: Melanite
var: Topazolite
Anilite
Anthophyllite
Antigorite
'Apatite'
Aragonite
Arsenopyrite
Artinite
'Asbestos'
Aurivilliusite (TL)
Baddeleyite
Banalsite
Baotite
Bario-orthojoaquinite (TL)
Barioperovskite (TL)
Barkevikite
Baryte
Beidellite
Benitoite (TL)
'Bentonite'
Brochantite
Brucite
Calcite
Calomel
Carpathite
Chalcocite
'Chlorite Group'
Chromite
Chrysocolla
Chrysotile
Cinnabar
Clearcreekite (TL)
Clinochlore
var: Chromian Clinochlore
Clinochlore
var: Pennine

'Clinopyroxene Subgroup'
Coalingite (TL)
Copper
Covellite
Crossite
Datolite
Deanesmithite (TL)
Desautelsite
Diadochite
Digenite
Diopside
Djurleite
Dolomite
Donharrisite
Dypingite
Edgarbaileyite (TL)
Edoylerite (TL)
Eglestonite
Epidote
Epsomite
Eskolaite
'Feldspar Group'
Ferrohornblende
Fluorapatite
var: Strontian Apatite
Fluorstrophite
Fresnoite
Galena
'Garnet'
'Garnierite' ?
Gianellaite
Glaucophane
Goethite
'Grossular-Hibschite Series'
Gypsum
Hanawaltite (TL)
Hematite
'Hornblende'
Huntite
Hydromagnesite
Hydrotalcite
Idrialite
Ilmenite
Jadeite
Jarosite
Joaquinite-(Ce) (TL)
Jonesite (TL)
'K Feldspar
var: Adularia'

Koninckite
Lawsonite
Lizardite
Magnesiochromite
Magnesioferrite
Magnesite
var: Ferroan Magnesite
Magnetite
Malachite
Marcasite
Melanophlogite
Melanterite
Mercury
Metacinnabar
var: Onofrite
Millerite
Montmorillonite
Montroydite
Mosesite
Mountkeithite
Muscovite
Natrolite
Népouite
Neptunite
Nesquehonite
Nimite
Omphacite
Opal
Orthoclase
Orthojoaquinite-(Ce) (TL)
Pecoraite
Pectolite
Perovskite
Peterbaylissite (TL)
Prehnite
Pseudomalachite
'Psilomelane'
'Pumpellyite'
Pyrite
Pyroaurite
Pyrrhotite
Quartz
var: Amethyst
var: Chalcedony
Reevesite
Rozenite
Rutile
Schorlomite
Schuetteite
Sepiolite
Sérandite
'Serpentine Group'
'var: Marmolite'
Silver
Spinel
Stevensite
Stibnite
Stilpnomelane
Strontiojoaquinite (TL)
Sulphur
Szymańskiite (TL)
Talc
Taramellite
Tedhadleyite (TL)
Terlinguaite
Thomsonite-Ca
Tiemannite
Titanite
Titantaramellite
Todorokite
Tremolite
'Unnamed (Ba Titanate)'
'Unnamed (Ba Titanate II)'
Uvarovite
Valentinite
Vasilyevite (TL)
Vermiculite
Vesuvianite
Vivianite
Voltaite
Wattersite (TL)
Witherite
Wollastonite
Zircon


204 entries listed. 147 valid minerals. 19 type localities (valid minerals). 1 erroneous literature entry.

Localities in this Region

USA
USA

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Copyright © Jolyon Ralph and Ida Chau 1993-2011. Jobs in California, USA Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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