Chemical and petrologic relations of the constituent units in ALH-77249 meteorite (L3)

• Main Author: Makoto Kimura
• Format: Report
• Language: English
• Published: Department of Earth Sciences, Faculty of Science,Ibaraki 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=1557; http://id.nii.ac.jp/1291/00001557/; https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1557&item_no=1&attribute_id=18&file_no=1

This paper describes all constituent units in ALH-77249 (L3), and states genetic relations of the units. This meteorite is identical with ALH-77015 and probably -77033. ALH-77249 consists of chondrules, mineral fragments, several types of inclusions, and matrix in order of amount. Some inclusions were derived from precursor materials which are depleted in plagioclase component. Some other inclusions were derived from chondrules through shockmetamorphism. Early-formed chondrules were frequently disaggregated to form a large amount of silicate mineral fragments. ALH-77249 includes some carbonaceous chondritic materials such as an amoeboid olivine inclusion and matrix.