40Ar-39Ar age analyses of some intruded rocks from Mt. Riiser-Larsen in the Napier Complex

• Main Authors: Yutaka Takigami, Naoto Ishikawa, Minoru Funaki
• Format: Report
• Language: English
• Published: Kanto Gakuen University/School of Earth Sciences, HIS, Kyoto University/National Institute of Polar Research 2002
• Subjects: ^<40>Ar-^<39>Ar age; Mt. Riiser-Larsen; Napier Complex; East Antarctica; Riiser-Larsen; Napier; Antarc*; Antarctica; Polar geoscience
• Online Access: https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=3107; http://id.nii.ac.jp/1291/00003107/; https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=3107&item_no=1&attribute_id=18&file_no=1

Three ^<40>Ar-^<39>Ar geochronological studies are performed for intruded rocks from Mt Riiser-Larsen in the Napier Complex, East Antarctica All samples have excess Ar and no ^<40>Ar-^<39>Ar plateau ages are obtained from these results Considering two previous age results, however, two metamorphic events at about 700-750 Ma and 1000-1100 Ma might have been suggested