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Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/4074
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| Title: | Magnetic classification of stony meteorites: 2. Non-ordinary chondrites |
| Authors: | Rochette, P.* Gattacceca, J.* Bonal, L.* Bourotte-Denise, M.* Chevrier, V.* Clerc, J.-P.* Consolmagno, G.* Folco, L.* Gounelle, M.* Kohout, T.* Pesonen, L.* Quirico, E.* Sagnotti, L.* Skripnik, A.* |
| Keywords: | meteorites chondrites magnetic susceptibility |
| Issue Date: | Sep-2008 |
| Publisher: | The Meteoritical Society |
| Title of journal: | Meteoritics & Planetary Science |
| Series/Report no.: | 5 / 43 (2008) |
| Abstract: | A database of magnetic susceptibility (χ) measurements on different non-ordinary
chondrites (C, E, R, and ungrouped) populations is presented and compared to our previous similar work on ordinary chondrites. It provides an exhaustive study of the amount of iron-nickel magnetic phases (essentially metal and magnetite) in these meteorites. In contrast with all the other classes, CM
and CV show a wide range of magnetic mineral content, with a two orders of magnitude variation of χ. Whether this is due to primary parent body differences, metamorphism or alteration, remains unclear. C3–4 and C2 yield similar χ values to the ones shown by CK and CM, respectively. By order of increasing χ, the classes with well-grouped χ are: R << CO < CK ≈ CI < Kak < CR < E ≈ CH < CB. Based on magnetism, EH and EL classes have indistinguishable metal content. Outliers that we suggest may need to have their classifications reconsidered are Acfer 202 (CO), Elephant Moraine (EET) 96026 (C4–5), Meteorite Hills (MET) 01149, and Northwest Africa (NWA) 521 (CK), Asuka
(A)-88198, LaPaz Icefield (LAP) 031156, and Sahara 98248 (R). χ values can also be used to define affinities of ungrouped chondrites, and propose pairing, particularly in the case of CM and CV meteorites. |
| URI: | http://hdl.handle.net/2122/4074 |
| Appears in Collections: | Papers Published / Papers in press 04.05.07. Rock magnetism
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