60Fe-60Ni systematics in the eucrite parent body: A case study of Bouvante and Juvinas

Maria Schonbachler; Ghylaine Quitté; Christopher Latkoczy; Maria Schönbächler; Alex N. Halliday; Detlef Günther

doi:10.1016/j.gca.2011.09.037

60Fe-60Ni systematics in the eucrite parent body: A case study of Bouvante and Juvinas

Maria Schonbachler, Ghylaine Quitté, Christopher Latkoczy, Maria Schönbächler, Alex N. Halliday, Detlef Günther

Research output: Contribution to journal › Article › peer-review

Abstract

Eucrites are basaltic meteorites that cooled rapidly but are in many instances thermally metamorphosed and impact brecciated. The exact timing of these events remains unclear. In this study, Ni isotopic compositions and Fe/Ni elemental ratios are presented for two non-cumulate eucrites, Bouvante and Juvinas, including mineral separates from the latter. The samples are characterized by variable, well-resolved 60Ni-excesses consistent with the former presence of live 60Fe (t1/2=2.62Ma) at the time of eucrite crystallization. A significant fraction of Ni with a terrestrial-like composition appears to be surface correlated. This Ni may be the product of terrestrial contamination or was introduced by a chondritic impactor during brecciation. Altogether, the data provide evidence for a complex and probably multi-stage history of Fe and/or Ni redistribution, which impedes the interpretation of the chronological data. © 2011 Elsevier Ltd.

Original language	English
Pages (from-to)	7698-7706
Number of pages	8
Journal	Geochimica et Cosmochimica Acta
Volume	75
Issue number	23
DOIs	https://doi.org/10.1016/j.gca.2011.09.037
Publication status	Published - 1 Dec 2011

Access to Document

10.1016/j.gca.2011.09.037

Cite this

@article{11c637c2e2ae4d47945c64ad18f00ccd,

title = "60Fe-60Ni systematics in the eucrite parent body: A case study of Bouvante and Juvinas",

abstract = "Eucrites are basaltic meteorites that cooled rapidly but are in many instances thermally metamorphosed and impact brecciated. The exact timing of these events remains unclear. In this study, Ni isotopic compositions and Fe/Ni elemental ratios are presented for two non-cumulate eucrites, Bouvante and Juvinas, including mineral separates from the latter. The samples are characterized by variable, well-resolved 60Ni-excesses consistent with the former presence of live 60Fe (t1/2=2.62Ma) at the time of eucrite crystallization. A significant fraction of Ni with a terrestrial-like composition appears to be surface correlated. This Ni may be the product of terrestrial contamination or was introduced by a chondritic impactor during brecciation. Altogether, the data provide evidence for a complex and probably multi-stage history of Fe and/or Ni redistribution, which impedes the interpretation of the chronological data. {\textcopyright} 2011 Elsevier Ltd.",

author = "Maria Schonbachler and Ghylaine Quitt{\'e} and Christopher Latkoczy and Maria Sch{\"o}nb{\"a}chler and Halliday, {Alex N.} and Detlef G{\"u}nther",

year = "2011",

month = dec,

day = "1",

doi = "10.1016/j.gca.2011.09.037",

language = "English",

volume = "75",

pages = "7698--7706",

journal = "Geochimica et Cosmochimica Acta",

issn = "0016-7037",

publisher = "Elsevier BV",

number = "23",

}

TY - JOUR

T1 - 60Fe-60Ni systematics in the eucrite parent body: A case study of Bouvante and Juvinas

AU - Schonbachler, Maria

AU - Quitté, Ghylaine

AU - Latkoczy, Christopher

AU - Schönbächler, Maria

AU - Halliday, Alex N.

AU - Günther, Detlef

PY - 2011/12/1

Y1 - 2011/12/1

N2 - Eucrites are basaltic meteorites that cooled rapidly but are in many instances thermally metamorphosed and impact brecciated. The exact timing of these events remains unclear. In this study, Ni isotopic compositions and Fe/Ni elemental ratios are presented for two non-cumulate eucrites, Bouvante and Juvinas, including mineral separates from the latter. The samples are characterized by variable, well-resolved 60Ni-excesses consistent with the former presence of live 60Fe (t1/2=2.62Ma) at the time of eucrite crystallization. A significant fraction of Ni with a terrestrial-like composition appears to be surface correlated. This Ni may be the product of terrestrial contamination or was introduced by a chondritic impactor during brecciation. Altogether, the data provide evidence for a complex and probably multi-stage history of Fe and/or Ni redistribution, which impedes the interpretation of the chronological data. © 2011 Elsevier Ltd.

AB - Eucrites are basaltic meteorites that cooled rapidly but are in many instances thermally metamorphosed and impact brecciated. The exact timing of these events remains unclear. In this study, Ni isotopic compositions and Fe/Ni elemental ratios are presented for two non-cumulate eucrites, Bouvante and Juvinas, including mineral separates from the latter. The samples are characterized by variable, well-resolved 60Ni-excesses consistent with the former presence of live 60Fe (t1/2=2.62Ma) at the time of eucrite crystallization. A significant fraction of Ni with a terrestrial-like composition appears to be surface correlated. This Ni may be the product of terrestrial contamination or was introduced by a chondritic impactor during brecciation. Altogether, the data provide evidence for a complex and probably multi-stage history of Fe and/or Ni redistribution, which impedes the interpretation of the chronological data. © 2011 Elsevier Ltd.

U2 - 10.1016/j.gca.2011.09.037

DO - 10.1016/j.gca.2011.09.037

M3 - Article

VL - 75

SP - 7698

EP - 7706

JO - Geochimica et Cosmochimica Acta

JF - Geochimica et Cosmochimica Acta

SN - 0016-7037

IS - 23

ER -

60Fe-60Ni systematics in the eucrite parent body: A case study of Bouvante and Juvinas

Abstract

Access to Document

Fingerprint

Cite this