Coolamon meteorite, Bourke Co., New South Wales, Australia
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| Latitude & Longitude (WGS84): | 34° 49' 0'' South , 147° 7' 59'' East |
|---|---|
| Latitude & Longitude (decimal): | -34.81667,147.13333 |
| Non-native locality type: | Meteorite |
| Köppen climate type: | Cfa : Humid subtropical climate |
Ordinary chondrite (L6)
Find, 1963; 393 g
A complete meteoric stone was found by G. Eisenhower while plowing his "Bonnie Doon" property. Inspections reveal indistinct chondrules within an equilibrated matrix. Compositionally, equilibrated olivine (Fa25.9) and low Ca-orthopyroxene (Fs21.4) are characteristic of the L-chondrite geochemical group. Mineralogically, the meteorite consists primarily of dominant olivine plus pyroxene accompanied by minor troilite and Fe-Ni metal. Accessory chromite, copper, ilmenite, and minor sulfides have also been reported. Very strong shocks have converted most of the plagioclase to maskelynite. More interestingly, ringwoodite and majorite, high pressure polymorphs of olivine and pyroxene, respectively, are indicative of a very high pressure (collisional) event.
The main mass is at the Australian Museum in Sydney.
Mineral List
9 valid minerals.
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References
Krinov, E. L. (Editor) (1965) The Meteoritical Bulletin, No. 33. Moscow.
Ramdohr, P. (1973) The Opaque Minerals in Stony Meteorites. Elsevier Publishing Company: Amsterdam; London: New York. 245 pages.
Mason, B. (1974) Notes on Australian meteorites: Records of the Australian Museum 29(5): 169–186, plates 6–7. (May 1974).
Graham, A.L., Bevan, A.W.R., Hutchison, B. (1985) Catalogue of Meteorites (4/e). University of Arizona Press: Tucson.
Grady, M.M. (2000) Catalogue of Meteorites (5/e). Cambridge University Press: Cambridge; New York; Oakleigh; Madrid; Cape Town. 689 pages.
Ramdohr, P. (1973) The Opaque Minerals in Stony Meteorites. Elsevier Publishing Company: Amsterdam; London: New York. 245 pages.
Mason, B. (1974) Notes on Australian meteorites: Records of the Australian Museum 29(5): 169–186, plates 6–7. (May 1974).
Graham, A.L., Bevan, A.W.R., Hutchison, B. (1985) Catalogue of Meteorites (4/e). University of Arizona Press: Tucson.
Grady, M.M. (2000) Catalogue of Meteorites (5/e). Cambridge University Press: Cambridge; New York; Oakleigh; Madrid; Cape Town. 689 pages.
External Links
http://www.lpi.usra.edu/meteor/metbull.php - MeteoriticalBulletinDatabase
http://www.lpi.usra.edu/meteor/metbull.php?code=5433 - Coolamon@MetBullDatabase
http://www.lpi.usra.edu/meteor/metbull.php?code=5433 - Coolamon@MetBullDatabase
