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Coon Butte meteorite, Coconino Co., Arizona, USAi
Regional Level Types
Coon Butte meteoriteMeteorite Fall Location
Coconino Co.County
ArizonaState
USACountry

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Key
Latitude & Longitude (WGS84):
35° North , 111° West
Latitude & Longitude (decimal):
Meteorite Class:
Meteoritical Society Class:
Nearest Settlements:
PlacePopulationDistance
LeChee1,443 (2011)22.8km
Winslow West438 (2011)22.8km
West Winslow150 (2006)23.9km
Winslow9,600 (2017)27.7km
Leupp951 (2011)33.1km


Ordinary chondrite, brecciated (L6,br)
Find, 1905; 2.789 kg

Only 1.5 km way from Arizona's Meteorite Crater a small, sharply pointed stony meteorite was recovered lying on the surface of the level limestone plain which dominates the region. The relatively fresh stone (~14.5x11.8x8.9 cm) had broken, apparently upon impact, and was imbedded only 2-3 cm into the soil. Inspections reveal indistinct chondrules and chondrule fragments within a largely equilibrated, but brecciated matrix. A few grains of Fe-Ni metal and rusty spots are visible to the naked eye. Mineralogically the meteorite is dominated by olivine and pyroxene accompanied by troilite, Fe-Ni metal, and feldspathic glass. Olivine (Fa24) and the albitic plagioclase-maskelynite composition are the most obvious indicators of its L6 classification. Accessory chromite and a few additional very minor opaques have also been reported.

A U,Th-He gas retention age of ~580 Ma and a cosmic ray exposure age of ~32 Ma have been reported.

Major Holdings: ~530 g is now at Arizona State University in Tempe [March 2016]. For the past century, smaller masses have been kept at the Field Museum of Natural History in Chicago (~309 g) and the United States National Museum in Washington (~200 g).

Regions containing this locality

North America PlateTectonic Plate
Colorado Plateau, USAPlateau

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


9 valid minerals.

Meteorite/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:

'Albite-Anorthite Series'
Description: Composition [Or5.2 An10.1 Ab84.7]. Mostly converted into maskelynite.
Reference: Van Schmus, W.R. & Ribbe, P.H. (1968) The composition and structural state of feldspar from chondritic meteorites: Geochimica et Cosmochimica Acta 32(12): 1327-1342. (Dec. 1968).
Chromite
Formula: Fe2+Cr3+2O4
Reference: Mallet, J. W. (1906) A Stony Meteorite from Coon Butte, Arizona: American Journal of Science and Arts (4th Series) Vol. 21: 347-355.; Ramdohr, P. (1973). The Opaque Minerals in Stony Meteorites. Elsevier Publishing Company: Amsterdam; London: New York. 245 pages.
Diopside
Formula: CaMgSi2O6
Reference: van Schmus, W.R. & Koffman, D.M. (1967) Equilibration Temperatures of Iron and Magnesium in Chondritic Meteorites: Science, New Series 155 (3765): 1009-1011. (Feb 1967).
'Fayalite-Forsterite Series'
Description: Olivine is found in irregular grains, barred chondrules (BO) and occasional porphyritic chondrules(PO). Composition Fa24, (Mason, 1963).
Reference: Mallet, J. W. (1906) A Stony Meteorite from Coon Butte, Arizona: American Journal of Science and Arts (4th Series) Vol. 21: 347-355.; Farrington, O.C. (1915). Catalogue of the meteorites of North America: Memoirs of the National Academy of Sciences, Vol. 13: Washington. 545 pages.; Mason, B. (1963) Olivine in ordinary chondrites. Geochimica et Cosmochimica Acta 27(9): 1011-1023. (Sept 1963).; Keil, K. & Fredriksson, K. (1964) The Fe, Mg and Ca Distribution in Coexisting Olivines and Rhombic Pyroxenes of Chondrites. Journal of Geophysical Research Atmospheres 69 (16): 3487-3515. (August 1964). ; van Schmus, W.R. & Koffman, D.M. (1967) Equilibration Temperatures of Iron and Magnesium in Chondritic Meteorites: Science, New Series 155 (3765): 1009-1011. (Feb 1967).
'Glass'
Reference: Mallet, J. W. (1906) A Stony Meteorite from Coon Butte, Arizona: American Journal of Science and Arts (4th Series) Vol. 21: 347-355.
Ilmenite
Formula: Fe2+TiO3
Reference: Snetsinger, K.G. & Keil, K. (1969) Ilmenite in ordinary chondrites. Amer. Mineral. 54 (5/6):780-786. (May-June 1969).; Ramdohr, P. (1973). The Opaque Minerals in Stony Meteorites. Elsevier Publishing Company: Amsterdam; London: New York. 245 pages.
Iron
Formula: Fe
Reference: Ramdohr, P. (1973). The Opaque Minerals in Stony Meteorites. Elsevier Publishing Company: Amsterdam; London: New York. 245 pages.
Iron var: Kamacite
Formula: (Fe,Ni)
Reference: Ramdohr, P. (1973). The Opaque Minerals in Stony Meteorites. Elsevier Publishing Company: Amsterdam; London: New York. 245 pages.
Isocubanite
Formula: CuFe2S3
Reference: Ramdohr, P. (1973). The Opaque Minerals in Stony Meteorites. Elsevier Publishing Company: Amsterdam; London: New York. 245 pages.
'Limonite'
Formula: (Fe,O,OH,H2O)
Reference: Farrington, O.C. (1915). Catalogue of the meteorites of North America: Memoirs of the National Academy of Sciences, Vol. 13: Washington. 545 pages.
Mackinawite
Formula: (Fe,Ni)9S8
Reference: Ramdohr, P. (1973). The Opaque Minerals in Stony Meteorites. Elsevier Publishing Company: Amsterdam; London: New York. 245 pages.
'Maskelynite'
Reference: Van Schmus, W.R. & Ribbe, P.H. (1968) The composition and structural state of feldspar from chondritic meteorites: Geochimica et Cosmochimica Acta 32(12): 1327-1342. (Dec. 1968).
'Orthopyroxene Subgroup'
Reference: Keil, K. & Fredriksson, K. (1964) The Fe, Mg and Ca Distribution in Coexisting Olivines and Rhombic Pyroxenes of Chondrites. Journal of Geophysical Research Atmospheres 69 (16): 3487-3515. (August 1964). ; van Schmus, W.R. & Koffman, D.M. (1967) Equilibration Temperatures of Iron and Magnesium in Chondritic Meteorites: Science, New Series 155 (3765): 1009-1011. (Feb 1967).
'Pyroxene Group'
Description: Pyroxene is found in irregular grains and radial chondrules (RP).
Reference: Farrington, O.C. (1915). Catalogue of the meteorites of North America: Memoirs of the National Academy of Sciences, Vol. 13: Washington. 545 pages.
Schreibersite
Formula: (Fe,Ni)3P
Reference: Mallet, J. W. (1906) A Stony Meteorite from Coon Butte, Arizona: American Journal of Science and Arts (4th Series) Vol. 21: 347-355.; Farrington, O.C. (1915). Catalogue of the meteorites of North America: Memoirs of the National Academy of Sciences, Vol. 13: Washington. 545 pages.
Taenite
Formula: (Fe,Ni)
Reference: Ramdohr, P. (1973). The Opaque Minerals in Stony Meteorites. Elsevier Publishing Company: Amsterdam; London: New York. 245 pages.
Troilite
Formula: FeS
Reference: Farrington, O.C. (1915). Catalogue of the meteorites of North America: Memoirs of the National Academy of Sciences, Vol. 13: Washington. 545 pages.; Ramdohr, P. (1973). The Opaque Minerals in Stony Meteorites. Elsevier Publishing Company: Amsterdam; London: New York. 245 pages.

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Iron1.AE.05Fe
var: Kamacite1.AE.05(Fe,Ni)
Schreibersite1.BD.05(Fe,Ni)3P
Taenite1.AE.10(Fe,Ni)
Group 2 - Sulphides and Sulfosalts
Isocubanite2.CB.55bCuFe2S3
Mackinawite2.CC.25(Fe,Ni)9S8
Troilite2.CC.10FeS
Group 4 - Oxides and Hydroxides
Chromite4.BB.05Fe2+Cr3+2O4
Ilmenite4.CB.05Fe2+TiO3
Group 9 - Silicates
Diopside9.DA.15CaMgSi2O6
Unclassified Minerals, Rocks, etc.
'Albite-Anorthite Series'-
'Fayalite-Forsterite Series'-
'Glass'-
'Limonite'-(Fe,O,OH,H2O)
'Maskelynite'-
'Orthopyroxene Subgroup'-
'Pyroxene Group'-

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Metals, other than the Platinum Group
Iron
var: Kamacite
1.1.11.1(Fe,Ni)
Schreibersite1.1.21.2(Fe,Ni)3P
Taenite1.1.11.2(Fe,Ni)
Group 2 - SULFIDES
AmBnXp, with (m+n):p = 9:8
Mackinawite2.7.2.1(Fe,Ni)9S8
AmXp, with m:p = 1:1
Troilite2.8.9.1FeS
AmBnXp, with (m+n):p = 1:1
Isocubanite2.9.13.3CuFe2S3
Group 4 - SIMPLE OXIDES
A2X3
Ilmenite4.3.5.1Fe2+TiO3
Group 7 - MULTIPLE OXIDES
AB2X4
Chromite7.2.3.3Fe2+Cr3+2O4
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=2
Diopside65.1.3a.1CaMgSi2O6
Unclassified Minerals, Mixtures, etc.
'Albite-Anorthite Series'-
'Fayalite-Forsterite Series'-
'Glass'-
Iron-Fe
'Limonite'-(Fe,O,OH,H2O)
'Maskelynite'-
'Orthopyroxene Subgroup'-
'Pyroxene Group'-

List of minerals for each chemical element

HHydrogen
H Limonite(Fe,O,OH,H2O)
OOxygen
O ChromiteFe2+Cr23+O4
O Limonite(Fe,O,OH,H2O)
O IlmeniteFe2+TiO3
O DiopsideCaMgSi2O6
MgMagnesium
Mg DiopsideCaMgSi2O6
SiSilicon
Si DiopsideCaMgSi2O6
PPhosphorus
P Schreibersite(Fe,Ni)3P
SSulfur
S TroiliteFeS
S IsocubaniteCuFe2S3
S Mackinawite(Fe,Ni)9S8
CaCalcium
Ca DiopsideCaMgSi2O6
TiTitanium
Ti IlmeniteFe2+TiO3
CrChromium
Cr ChromiteFe2+Cr23+O4
FeIron
Fe ChromiteFe2+Cr23+O4
Fe Schreibersite(Fe,Ni)3P
Fe Limonite(Fe,O,OH,H2O)
Fe TroiliteFeS
Fe IlmeniteFe2+TiO3
Fe IsocubaniteCuFe2S3
Fe Iron (var: Kamacite)(Fe,Ni)
Fe Mackinawite(Fe,Ni)9S8
Fe Taenite(Fe,Ni)
Fe IronFe
NiNickel
Ni Schreibersite(Fe,Ni)3P
Ni Iron (var: Kamacite)(Fe,Ni)
Ni Mackinawite(Fe,Ni)9S8
Ni Taenite(Fe,Ni)
CuCopper
Cu IsocubaniteCuFe2S3

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Mallet, J. W. (1906) A Stony Meteorite from Coon Butte, Arizona: American Journal of Science and Arts (4th Series) Vol. 21: 347-355.
Farrington, O.C. (1915). Catalogue of the meteorites of North America: Memoirs of the National Academy of Sciences, Vol. 13: Washington. 545 pages.
Prior, G.T. (1923) Catalogue of Meteorites: with special reference to those represented in the collection of the British Museum of Natural History. Richard Clay & Sons, Limited: Bungay, Suffolk.
Mason, B. (1963) Olivine in ordinary chondrites. Geochimica et Cosmochimica Acta 27(9): 1011-1023. (Sept 1963).
van Schmus, W.R. & Koffman, D.M. (1967) Equilibration Temperatures of Iron and Magnesium in Chondritic Meteorites: Science, New Series 155 (3765): 1009-1011. (Feb 1967).
Van Schmus, W.R. & Ribbe, P.H. (1968) The composition and structural state of feldspar from chondritic meteorites: Geochimica et Cosmochimica Acta 32(12): 1327-1342. (Dec. 1968)
Snetsinger, K.G. & Keil, K. (1969) Ilmenite in ordinary chondrites. Amer. Mineral. 54 (5/6):780-786. (May-June 1969).
Ramdohr, P. (1973). The Opaque Minerals in Stony Meteorites. Elsevier Publishing Company: Amsterdam; London: New York. 245 pages.
Graham, A. L., Bevan, A. W. R. & Hutchison, B. (1985) Catalogue of Meteorites (4/e). University of Arizona Press: Tucson.
Wasson, J.J. & Wang, S. (1991) The histories of ordinary chondrite parent bodies: U,Th-He age distributions Meteoritics & Planetary Science 26(2): 161-167. (June 1991)..
Grady, M.M (2000). Catalogue of Meteorites (5/e). Cambridge University Press: Cambridge; New York; Oakleigh; Madrid; Cape Town. 689 pages.

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