Siderophile element characteristics of acapulcoite–lodranites and winonaites: Implications for the early differentiation processes of their parent bodies

Yoshihiro Hidaka, Naoki Shirai, Akira Yamaguchi, Mitsuru Ebihara

研究成果: Article

抄録

We have studied magnetic fractions of five acapulcoites, three lodranites, and two winonaites to investigate chemical compositions of their precursor materials and metallic partial melting processes occurring on their parent bodies. One winonaite metal is similar in composition to low Au, low Ni IAB iron subgroup, indicating genetic relationship between them. Magnetic fractions of chondrule-bearing acapulcoite and winonaite have intermediate chemical compositions of metals between H chondrites and EL chondrites. This fact indicates that the precursor materials of acapulcoite–lodranites and winonaites were similar to H and/or EL chondrites in chemical compositions. Magnetic fractions in acapulcoite–lodranites have a large variety of chemical compositions. Most of them show enrichments of W, Re, Ir, Pt, Mo, and Rh, and one of them shows clear depletion in Re and Ir relative to those of chondrule-bearing acapulcoite. Chemical compositional variations among acapulcoite–lodranite metals cannot be explained by a single Fe-Ni-S partial melting event, but a two-step partial melting model can explain it.

元の言語English
ジャーナルMeteoritics and Planetary Science
DOI
出版物ステータスPublished - 2019 1 1

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siderophile elements
siderophile element
parent body
acapulcoite
chondrites
chemical composition
chondrite
partial melting
chondrule
melting
metal
metals
subgroups
depletion
iron

ASJC Scopus subject areas

  • Geophysics
  • Space and Planetary Science

これを引用

Siderophile element characteristics of acapulcoite–lodranites and winonaites : Implications for the early differentiation processes of their parent bodies. / Hidaka, Yoshihiro; Shirai, Naoki; Yamaguchi, Akira; Ebihara, Mitsuru.

：: Meteoritics and Planetary Science, 01.01.2019.

研究成果: Article

Hidaka, Y, Shirai, N, Yamaguchi, A & Ebihara, M 2019, 'Siderophile element characteristics of acapulcoite–lodranites and winonaites: Implications for the early differentiation processes of their parent bodies', Meteoritics and Planetary Science. https://doi.org/10.1111/maps.13273
Hidaka Y, Shirai N, Yamaguchi A, Ebihara M. Siderophile element characteristics of acapulcoite–lodranites and winonaites: Implications for the early differentiation processes of their parent bodies. Meteoritics and Planetary Science. 2019 1 1. https://doi.org/10.1111/maps.13273
Hidaka, Yoshihiro ; Shirai, Naoki ; Yamaguchi, Akira ; Ebihara, Mitsuru. / Siderophile element characteristics of acapulcoite–lodranites and winonaites : Implications for the early differentiation processes of their parent bodies. ：: Meteoritics and Planetary Science. 2019.
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