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Magnetic classification of stony meteorites: 3. Achondrites
Author(s) -
ROCHETTE Pierre,
GATTACCECA Jérôme,
BOUROTDENISE Michèle,
CONSOLMAGNO Guy,
FOLCO Luigi,
KOHOUT Tomas,
PESONEN Lauri,
SAGNOTTI Leonardo
Publication year - 2009
Publication title -
meteoritics and planetary science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.09
H-Index - 100
eISSN - 1945-5100
pISSN - 1086-9379
DOI - 10.1111/j.1945-5100.2009.tb00741.x
Subject(s) - achondrite , meteorite , chondrite , remanence , geology , parent body , astrobiology , martian , geochemistry , mars exploration program , magnetization , physics , magnetic field , quantum mechanics
— A database of magnetic susceptibility measurements of stony achondrites (acapulcoite‐lodranite clan, winonaites, ureilites, angrites, aubrites, brachinites, howardite‐eucrite‐diogenite (HED) clan, and Martian meteorites, except lunar meteorites) is presented and compared to our previous work on chondrites. This database provides an exhaustive study of the amount of iron‐nickel magnetic phases (essentially metal and more rarely pyrrhotite and titanomagnetite) in these meteorites. Except for ureilites, achondrites appear much more heterogeneous than chondrites in metal content, both at the meteorite scale and at the parent body scale. We propose a model to explain the lack of or inefficient metal segregation in a low gravity context. The relationship between grain density and magnetic susceptibility is discussed. Saturation remanence appears quite weak in most metal‐bearing achondrites (HED and aubrites) compared to Martian meteorites. Ureilites are a notable exception and can carry a strong remanence, similar to most chondrites.