^<40>Ar-^<39>Ar Dating of Terrestrial and Exterrestrial Materials : Basalts from the Japan Sea Floor, Deccan Plateau and Meteorites from Antarctica

• Main Authors: Kaneoka Ichiro, Takigami Yutaka
• Format: Report
• Language: English
• Published: Tohoku University 1994
• Subjects: ^<40>Ar-^<39>Ar age; Japan Sea; Deccan Plateau; Meteorite; Antarctica; Antarc*
• Online Access: http://hdl.handle.net/10097/28522; https://tohoku.repo.nii.ac.jp/?action=repository_uri&item_id=47045; https://tohoku.repo.nii.ac.jp/?action=repository_action_common_download&item_id=47045&item_no=1&attribute_id=18&file_no=1

Through a series of ^<40>Ar-^<39>Ar dating for terrestrial and exterrestrial samples, the results for basalts from the Japan Sea floor, Deccan Plateau and for meteorites from Antarctica give significant information concerning their formation histories. ^<40>Ar-^<39>Ar ages of basalts from the Japan Sea floor give a constraint that the Japan Sea floor was formed at least 20 Ma. ^<40>Ar-^<39>Ar ages for dyke samples from the Deccan Plateau indicate a possibility for the occurrence of a little younger ages than that of the main plateau formations by a few million years. Meteorites collected from Antarctica show some variable ^<40>Ar-^<39>Ar ages reflecting their different thermal histories.