TY - JOUR
T1 - Redistribution of Sr and rare earth elements in the matrices of CV3 carbonaceous chondrites during aqueous alteration in their parent body
AU - Jogo, Kaori
AU - Ito, Motoo
AU - Nakamura, Tomoki
AU - Kobayashi, Sachio
AU - Lee, Jong Ik
N1 - Funding Information:
KJ performed the mineralogical observations, and KJ, MI and SK performed the SIMS measurements. KJ wrote the initial draft of the manuscript with MI, TM, SK and JL. All authors contributed to interpreting the results, writing the discussion and revising the manuscript. All authors read and approved the final manuscript. The meteoritic samples were provided by the National Institute of Polar Research (Japan) and the NASA Johnson Space center. We thank Ms. Moon and Dr. Park for the support to use SEM and FE-EPMA. We appreciate the detailed comments from Dr. Fujiya and an anonymous reviewer. We also thank Prof. Noguchi for the editorial handling. The authors declare that they have no competing interests. The data and materials are available upon request from the corresponding author (kaorijogo@kopri.re.kr). Not applicable. Not applicable. This work was supported by KOPRI project PM17030. MI was supported by the JSPS Grants-in-Aid for Science Research (no. 26287142) from the Shimadzu Science Foundation (2016). This work was supported in part by the Kochi Core Center Open Facility System under the MEXT foundation. Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
Funding Information:
This work was supported by KOPRI project PM17030. MI was supported by the JSPS Grants-in-Aid for Science Research (no. 26287142) from the Shimadzu Science Foundation (2016). This work was supported in part by the Kochi Core Center Open Facility System under the MEXT foundation.
PY - 2018/12/1
Y1 - 2018/12/1
N2 - We measured the abundances of Sr and rare earth elements (REEs) in the matrices of five CV3 carbonaceous chondrites: Meteorite Hills (MET) 00430, MET 01070, La Paz ice field (LAP) 02206, Asuka (A) 881317 and Roberts Massif (RBT) 04143. In the MET 00430 and MET 01074 matrices, the Sr/CI and light REE (LREE, La–Nd)/CI ratios positively correlate with the amounts of Ca-rich secondary minerals, which formed during aqueous alteration in the CV3 chondrite parent body. In contrast, in the LAP 02206 and RBT 04143 matrices, although the Sr/CI ratios correlate with the amounts of Ca-rich secondary minerals, the LREE/CI ratios vary independently from the amounts of any secondary minerals. This suggests that the LREE/CI ratios in these matrices were produced prior to the parent body alteration, probably in the solar nebula. The LREE/CI ratios of the LAP 02206 and RBT 04143 matrices reveal the mixing process of matrix minerals prior to the accretion of the CV3 chondrite parent body. The mixing degrees of matrix minerals might be different between these two matrices. Because solid materials would be mixed over time according to the radial diffusion model of a turbulent disk, the matrix minerals consisting of LAP 02206 and RBT 04143 matrices might be incorporated into their parent body with different timing.[Figure not available: see fulltext.].
AB - We measured the abundances of Sr and rare earth elements (REEs) in the matrices of five CV3 carbonaceous chondrites: Meteorite Hills (MET) 00430, MET 01070, La Paz ice field (LAP) 02206, Asuka (A) 881317 and Roberts Massif (RBT) 04143. In the MET 00430 and MET 01074 matrices, the Sr/CI and light REE (LREE, La–Nd)/CI ratios positively correlate with the amounts of Ca-rich secondary minerals, which formed during aqueous alteration in the CV3 chondrite parent body. In contrast, in the LAP 02206 and RBT 04143 matrices, although the Sr/CI ratios correlate with the amounts of Ca-rich secondary minerals, the LREE/CI ratios vary independently from the amounts of any secondary minerals. This suggests that the LREE/CI ratios in these matrices were produced prior to the parent body alteration, probably in the solar nebula. The LREE/CI ratios of the LAP 02206 and RBT 04143 matrices reveal the mixing process of matrix minerals prior to the accretion of the CV3 chondrite parent body. The mixing degrees of matrix minerals might be different between these two matrices. Because solid materials would be mixed over time according to the radial diffusion model of a turbulent disk, the matrix minerals consisting of LAP 02206 and RBT 04143 matrices might be incorporated into their parent body with different timing.[Figure not available: see fulltext.].
KW - Aqueous alteration
KW - CV3 carbonaceous chondrite
KW - Rare earth element
KW - Solar nebula
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U2 - 10.1186/s40623-018-0809-5
DO - 10.1186/s40623-018-0809-5
M3 - Article
AN - SCOPUS:85043582813
VL - 70
JO - Earth, Planets and Space
JF - Earth, Planets and Space
SN - 1343-8832
IS - 1
M1 - 37
ER -