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Peridot Mesa (Peridot occurrence 38), San Carlos, San Carlos Indian Reservation, Gila Co., Arizona, USAi
Regional Level Types
Peridot Mesa (Peridot occurrence 38)Mesa
San Carlos- not defined -
San Carlos Indian ReservationReservation
Gila Co.County
ArizonaState
USACountry

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Key
Latitude & Longitude (WGS84):
33° 19' 49'' North , 110° 29' 35'' West
Latitude & Longitude (decimal):
Locality type:
Nearest Settlements:
PlacePopulationDistance
San Carlos4,038 (2015)3.9km
Peridot1,350 (2011)4.1km
Pinal439 (2011)24.7km
Six Shooter Canyon1,019 (2017)26.5km
Copper Hill108 (2011)27.5km


A peridot/olivine mine located in secs. 18, 19 & 30, T1S, R19E; and in secs. 22-27, T1S, R18E, immediately SW of San Carlos. This site has been described as the most productive peridot locality in North America.

Mineralization is a mesa capped by a basalt flow from 10 to more than 100 feet thick, underlain by flat-lying tuffs, siltstones & gravels. These sedimentary rocks are regarded as the equivalent of the Gila Conglomerate and therefore of Pliocene or Pleistocene age. The peridot occurs in roughly ellipsoidal bombs, or segregations, in basalt & cinders erupted from a volcanic cone that occupies the SW corner of the mesa. It is present as euhedral crystals and as rounded grains. The ellipsoidal segregations containing the peridot make up 25 to 40% of the rock volume and average 3 to 8 inches in maximum diameter.

Workings: Mined intermittently by individuals (up to 50), who worked scattered portions of the deposit using hand methods. Also was mined by 5-10 person operations that are more mechanized. Most stones are gathered from debris resulting from the erosion of basalt. Prime locations are around the rim of the volcanic cone, in washes adjacent to the cone, and in small canyons that breach the north rim of the mesa.

Assay data: The olivine zone should maintain a minimum olivine content of 30% to be economical. The portions of the deposit olivine-rich zone with greater than 30% olivine are: SE¼ sec. 15, S½ sec. 14, sec. 22, N½ and SW¼ sec. 23, NW¼ sec. 26, and the NE¼ sec. 27, T1S, R18E.

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Standard Detailed Strunz Dana Chemical Elements

Mineral List


6 valid minerals.

Rock Types Recorded

Note: this is a very new system on mindat.org and data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

'Anorthoclase'
Formula: (Na,K)AlSi3O8
Description: Occurs as crystals in volcanic flow rocks.
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 114; Garcia, M.O., et al (1980), Volatiles in Ti-rich amphibole megacrysts, southwestern USA, Am.Min.: 65: 306-312.
'Apatite'
Formula: Ca5(PO4)3(Cl/F/OH)
Reference: MRDS database Dep. ID #10060353, RDS ID #TC10730.
'Clinopyroxene Subgroup'
Reference: Uchida et. al (2005) Single Crystal x-ray diffraction of spinels from the San Carlos Volcanic Field: Spinel as a geothermometer: American Mineralogist v. 90 p. 1900-1908.
Forsterite
Formula: Mg2SiO4
Reference: Van King; Uchida et. al (2005) Single Crystal x-ray diffraction of spinels from the San Carlos Volcanic Field: Spinel as a geothermometer: American Mineralogist v. 90 p. 1900-1908.
Forsterite var: Peridot
Formula: Mg2SiO4
Reference: Bromfield, C.S. & Shride (1956), Mineral resources of the San Carlos Indian Reservation, AZ, USGS Bull. 1027-N: 686-687.
Hercynite
Formula: Fe2+Al2O4
Reference: Uchida et. al (2005) Single Crystal x-ray diffraction of spinels from the San Carlos Volcanic Field: Spinel as a geothermometer: American Mineralogist v. 90 p. 1900-1908.
Kaersutite
Formula: {Na}{Ca2}{Mg3AlTi}(Al2Si6O22)O2
Reference: Garcia, M.O., et al (1980), Volatiles in Ti-rich amphibole megacrysts, southwestern USA, American Mineralogist: 65: 306-312
Magnetite ?
Formula: Fe2+Fe3+2O4
Reference: MRDS database Dep. ID #10060353, RDS ID #TC10730.
Nepheline
Formula: Na3K(Al4Si4O16)
Description: Nepheline is an interstitial phase in unaltered basalt.
Reference: Hadnott et al (2017) American Mineralogist
Pargasite
Formula: {Na}{Ca2}{Mg4Al}(Al2Si6O22)(OH)2
Reference: Garcia, M.O., et al (1980), Volatiles in Ti-rich amphibole megacrysts, southwestern USA, American Mineralogist: 65: 306-312

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
Hercynite4.BB.05Fe2+Al2O4
Magnetite ?4.BB.05Fe2+Fe3+2O4
Group 9 - Silicates
'Anorthoclase'9.FA.30(Na,K)AlSi3O8
Forsterite9.AC.05Mg2SiO4
var: Peridot9.AC.05Mg2SiO4
Kaersutite9.DE.15{Na}{Ca2}{Mg3AlTi}(Al2Si6O22)O2
Nepheline9.FA.05Na3K(Al4Si4O16)
Pargasite9.DE.15{Na}{Ca2}{Mg4Al}(Al2Si6O22)(OH)2
Unclassified Minerals, Rocks, etc.
'Apatite'-Ca5(PO4)3(Cl/F/OH)
'Clinopyroxene Subgroup'-

List of minerals arranged by Dana 8th Edition classification

Group 7 - MULTIPLE OXIDES
AB2X4
Hercynite7.2.1.3Fe2+Al2O4
Magnetite ?7.2.2.3Fe2+Fe3+2O4
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with all cations in octahedral [6] coordination
Forsterite51.3.1.2Mg2SiO4
Group 66 - INOSILICATES Double-Width,Unbranched Chains,(W=2)
Amphiboles - Mg-Fe-Mn-Li subgroup
Kaersutite66.1.3a.18{Na}{Ca2}{Mg3AlTi}(Al2Si6O22)O2
Pargasite66.1.3a.12{Na}{Ca2}{Mg4Al}(Al2Si6O22)(OH)2
Group 76 - TECTOSILICATES Al-Si Framework
Al-Si Framework with Al-Si frameworks
'Anorthoclase'76.1.1.6(Na,K)AlSi3O8
Al-Si Framework Feldspathoids and related species
Nepheline76.2.1.2Na3K(Al4Si4O16)
Unclassified Minerals, Mixtures, etc.
'Apatite'-Ca5(PO4)3(Cl/F/OH)
'Clinopyroxene Subgroup'-
Forsterite
var: Peridot
-Mg2SiO4

List of minerals for each chemical element

HHydrogen
H ApatiteCa5(PO4)3(Cl/F/OH)
H Pargasite{Na}{Ca2}{Mg4Al}(Al2Si6O22)(OH)2
OOxygen
O Forsterite (var: Peridot)Mg2SiO4
O Anorthoclase(Na,K)AlSi3O8
O ApatiteCa5(PO4)3(Cl/F/OH)
O Pargasite{Na}{Ca2}{Mg4Al}(Al2Si6O22)(OH)2
O Kaersutite{Na}{Ca2}{Mg3AlTi}(Al2Si6O22)O2
O ForsteriteMg2SiO4
O HercyniteFe2+Al2O4
O NephelineNa3K(Al4Si4O16)
O MagnetiteFe2+Fe23+O4
FFluorine
F ApatiteCa5(PO4)3(Cl/F/OH)
NaSodium
Na Anorthoclase(Na,K)AlSi3O8
Na Pargasite{Na}{Ca2}{Mg4Al}(Al2Si6O22)(OH)2
Na Kaersutite{Na}{Ca2}{Mg3AlTi}(Al2Si6O22)O2
Na NephelineNa3K(Al4Si4O16)
MgMagnesium
Mg Forsterite (var: Peridot)Mg2SiO4
Mg Pargasite{Na}{Ca2}{Mg4Al}(Al2Si6O22)(OH)2
Mg Kaersutite{Na}{Ca2}{Mg3AlTi}(Al2Si6O22)O2
Mg ForsteriteMg2SiO4
AlAluminium
Al Anorthoclase(Na,K)AlSi3O8
Al Pargasite{Na}{Ca2}{Mg4Al}(Al2Si6O22)(OH)2
Al Kaersutite{Na}{Ca2}{Mg3AlTi}(Al2Si6O22)O2
Al HercyniteFe2+Al2O4
Al NephelineNa3K(Al4Si4O16)
SiSilicon
Si Forsterite (var: Peridot)Mg2SiO4
Si Anorthoclase(Na,K)AlSi3O8
Si Pargasite{Na}{Ca2}{Mg4Al}(Al2Si6O22)(OH)2
Si Kaersutite{Na}{Ca2}{Mg3AlTi}(Al2Si6O22)O2
Si ForsteriteMg2SiO4
Si NephelineNa3K(Al4Si4O16)
PPhosphorus
P ApatiteCa5(PO4)3(Cl/F/OH)
ClChlorine
Cl ApatiteCa5(PO4)3(Cl/F/OH)
KPotassium
K Anorthoclase(Na,K)AlSi3O8
K NephelineNa3K(Al4Si4O16)
CaCalcium
Ca ApatiteCa5(PO4)3(Cl/F/OH)
Ca Pargasite{Na}{Ca2}{Mg4Al}(Al2Si6O22)(OH)2
Ca Kaersutite{Na}{Ca2}{Mg3AlTi}(Al2Si6O22)O2
TiTitanium
Ti Kaersutite{Na}{Ca2}{Mg3AlTi}(Al2Si6O22)O2
FeIron
Fe HercyniteFe2+Al2O4
Fe MagnetiteFe2+Fe23+O4

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Bromfield, C.S. & Shride (1956), Mineral resources of the San Carlos Indian Reservation, AZ, USGS Bull. 1027-N: 686-687.
Peirce, H.W. (1969), Gem Materials, in USGS & Arizona Bureau of Mines & US Bureau of Reclamation, Mineral and Water Resources of Arizona, Arizona Bureau of Mines Bull. 180 (USGS Bull.871): 359.
Rabb, D.D. and Vuich, J.S. (1975) San Carlos Indian Reservation Peridot Mine: Inspection Report B75-2, Arizona Bureau of Mines, University of Arizona, Tucson, 34 pp.
Moore, R.T. and Vuich, J.S. (1977) An Evaluation of the Olivine Resources of the San Carlos Apache Indian Reservations and Recommendations for Potential Development. NADSAT Project Completion Report No. 1. Arizona Bureau of Mines, 34 pp.
Garcia, M.O., et al (1980), Volatiles in Ti-rich amphibole megacrysts, southwestern USA, American Mineralogist: 65: 306-312.
Koivula, John (1981), San Carlos peridot, Gems and Gemology: 17: 4: 205-214
Peirce, H. Wesley (1990), Arizona Geological Survey Industrial Minerals card file.
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd. ed.: 114.
MRDS database Dep. ID #10060353, MRDS ID #TC10730; and Dep. ID #10113001, MAS ID #0040070542.
Uchida et. al (2005) Single Crystal x-ray diffraction of spinels from the San Carlos Volcanic Field: Spinel as a geothermometer: American Mineralogist v. 90 p. 1900-1908.
Hadnott B.A., Ehlmann B.L. and Jolliff B.L. (2017) Mineralogy and chemistry of San Carlos high-alkali basalts: Analyses of alteration with application for Mars exploration: American Mineralogist 102, 284-301. (individual microprobe analyses of all phases in the basalt plus a photo of the outcrop.)

Other Databases

USGS MRDS Record:10060353

Other Regions, Features and Areas containing this locality

North America
North America PlateTectonic Plate

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