| 46678 |
Creator |
1c5c32b11b5ad1bd9c846a77784abc38 |
| 46678 |
Creator |
ext-4ca05e2b3310898537360f1a9f42e328 |
| 46678 |
Creator |
ext-4c74f725bc5633bae309120337f5da69 |
| 46678 |
Creator |
ext-a3f3d39ad0d7090f22001b1e101bcac2 |
| 46678 |
Creator |
ext-a6745576dea5d6a9f571b493660fbe07 |
| 46678 |
Creator |
ext-e44118bc542400220c90c3b4759bb79f |
| 46678 |
Date |
2016 |
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Is Part Of |
repository |
| 46678 |
Is Part Of |
p18805973 |
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abstract |
We measured the hydrogen isotopic composition (D/H ratios) and U-Pb chronology of
phosphate minerals in a young Martian meteorite: LAR 06319. D/H ratios of melt-inclusions
in the meteorite were also investigated to evaluate the presence of water reservoirs
on Mars in recent times. The total Pb/U dating of multiple grains of apatite and merrillite
yield a concordant date of 167 ± 57 Ma, interpreted as the crystallization age, suggesting
that both apatite and merrillite in this meteorite have preserved their igneous histories.
The D/H ratios of an apatite grain show good reproducibility yielding a δD value of
4250 ± 120 ‰, whereas those of merrillite show larger D/H variations with the maximum
δD value of 5260 ± 790 ‰. However, mafic glass in melt-inclusions shows extremely
large variation in δD, ranging from ca. 1070 ‰ to 6830 ± 460 ‰. The different D/H
signatures recorded in these phases reflect the contributions of different hydrous
components with distinct D/H ratios, possibly incorporated at different times. It
is inferred that several isotopically distinct water reservoirs exist in the present
Martian surface/sub-surface system. |
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authorList |
authors |
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issue |
5 |
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status |
peerReviewed |
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volume |
50 |
| 46678 |
type |
AcademicArticle |
| 46678 |
type |
Article |
| 46678 |
label |
Koike, Mizuho; Sano, Yuji; Takahata, Naoto; Ishida, Akizumi; Sugiura, Naoji and Anand,
Mahesh (2016). Combined investigation of H isotopic compositions and U-Pb chronology
of young Martian meteorite Larkman Nunatak 06319. Geochemical Journal, 50(5) pp.
363–377. |
| 46678 |
label |
Koike, Mizuho; Sano, Yuji; Takahata, Naoto; Ishida, Akizumi; Sugiura, Naoji and
Anand, Mahesh (2016). Combined investigation of H isotopic compositions and U-Pb
chronology of young Martian meteorite Larkman Nunatak 06319. Geochemical Journal,
50(5) pp. 363–377. |
| 46678 |
Title |
Combined investigation of H isotopic compositions and U-Pb chronology of young Martian
meteorite Larkman Nunatak 06319 |
| 46678 |
in dataset |
oro |