Sm-Nd isotopic systematics and REE abundance studies of the ALH-765 eucrite

• Main Authors: Noboru Nakamura, Mitsunobu Tatsumoto, Denis Coffrant
• Format: Report
• Language: English
• Published: Department of Earth Sciences, Faculty of Science, Kobe University 1983
• Subjects: Memoirs of National Institute of Polar Research; Polar Research
• Online Access: https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=1570; http://id.nii.ac.jp/1291/00001570/; https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1570&item_no=1&attribute_id=18&file_no=1

Analyses of Sm-Nd systematics and REE concentrations were carried out for the whole rock and mineral separates from the ALH-765 meteorite. A Sm-Nd age of 4.52±0.09 (2σ) b. y. and an initial ^<143>(Nd)/^<144>(Nd) ratio of 0.50675±0.00011 (2σ) have been obtained. The previously reported Ce irregularities have been re-examined in this work. The large Ce anomalies and some minor Sm-Nd system disturbances observed for the meteorite may be interpreted as results of terrestrial weathering effects.