Post-peak (<530 Ma) thermal history of Lützow-Holm Complex, East Antarctica, based on Rb-Sr and Sm-Nd mineral chronology

Tomoharu Miyamoto, M. Satish-Kumar, Daniel J. Dunkley, Yasuhito Osanai, Yasutaka Yoshimura, Yoichi Motoyoshi, Christopher J. Carson

研究成果: ジャーナルへの寄稿学術誌査読

2 被引用数 (Scopus)

抄録

Rb-Sr and Sm-Nd mineral dating of metamorphic rocks from Skallen, Skallevikshalsen and Rundvågshetta, in the southwestern part of the Lützow-Holm Complex, Dronning Maud Land, assists in constructing a thermal history after peak metamorphism. The results fall into two groups: (1) a record of regional cooling after peak metamorphism (524-488 Ma); (2) local resetting 50-80 Ma after peak metamorphism (474-446 Ma). This grouping is consistently observed in published ages from various localities in the Lützow-Holm Complex. A Sm-Nd age of 524 Ma is indistinguishable from published zircon and monazite ages. Ages of 511 and 488 Ma are related to cooling after peak metamorphism. The younger age group overlaps with ages of post-metamorphic magmatism and related hydrothermal activity reported from localities throughout East Antarctica. This intracontinental, post-orogenic igneous activity continued after the tectonic assembly of Gondwana.

本文言語英語
ページ(範囲)165-181
ページ数17
ジャーナルGeological Society Special Publication
308
DOI
出版ステータス出版済み - 12月 1 2008

!!!All Science Journal Classification (ASJC) codes

  • 水の科学と技術
  • 海洋工学
  • 地質学

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