@article{oai:nipr.repo.nii.ac.jp:00010086, author = {Misawa, Keiji and Park, Jisun and Shih, Chi-Yu and Reese, Young and Bogard, Donald D. and Nyquist, Larry E. and Misawa, Keiji and Park, Jisun and Shih, Chi-Yu and Reese, Young and Bogard, Donald D. and Nyquist, Larry E.}, issue = {3}, journal = {Polar science, Polar science}, month = {Sep}, note = {Isotopic analysis of the Martian lherzolitic shergottite Yamato 000097 yields a Rb-Sr age of 147±28 Ma with an initial ^<87>Sr/^<86>Sr ratio of 0.710490±0.000072, a Sm-Nd age of 152±13 Ma with an initial ε^<143>Nd-value of +11.7±0.2 and a ^<39>Ar-^<40>Ar age of 〜260 Ma. The near concordance of these ages and the Rb-Sr and Sm-Nd initial isotopic signatures suggest that Yamato 000097 crystallized from low Rb/Sr, light rare earth element depleted source materials 〜150 Ma ago. Although the ^<39>Ar-^<40>Ar age is significantly higher than the Rb-Sr and Sm-Nd ages, Yamato 000097 shows little to no evidence of trapped Martian atmospheric ^<40>Ar. The trapped ^<40>Ar concentration of Yamato 000097 is similar to that of Zagami, suggesting basaltic and lherzolitic shergottites may have similarly inherited excess ^<40>Ar from their magmas.The Rb-Sr and Sm-Nd ages and initial ^<87>Sr/^<86>Sr and ε^<143>Nd-values of Yamato 000097 and Yamato 793605 lie on the same isotopic ingrowth curves, suggesting that they came from very similar mantle sources. Allan Hills 77005 probably came from the same source, but Lewis Cliff 88516 appears to be from a distinct but similar source. Yamato 000097 represents the most recent magmatism from its source of which we have record, and is the youngest Martian meteorite for which concordant Rb-Sr and Sm-Nd ages have been determined., Yamato 000097のルビジウム-ストロンチウム、サマリウム-ネオジム、アルゴン-アルゴン同位体年代学研究から、以下のことがあきらかになった。1)この岩石は、Rb/Sr比が小さく、軽希土に乏しいマントル起源物質から~150 Maに結晶化した。2)Yamato 000097に認められる過剰40Arは、火星大気を捕獲したものではなく、火星マントルの特徴を受け継いだものである。3)Yamato 000097とYamato 793605およびAllan Hills 77005は、同一のマントル起源物質に由来する。Lewis Cliff 88526の起源物質は、化学的な特徴がやや異なっている。}, pages = {163--174}, title = {Rb-Sr, Sm-Nd and Ar-Ar isotopic systematics of lherzolitic shergottite Yamato 000097}, volume = {2}, year = {2008} }