Permo-Triassic collision, subduction-zone metamorphism, and tectonic exhumation along the East Asian continental margin

W. G. Ernst, Tatsuki Tsujimori, Ruth Zhang, J. G. Liou

研究成果: Chapter

202 被引用数 (Scopus)

抄録

Convergent plate motion at ∼320-210 Ma generated the Tongbai-Dabie-Sulu (east-central China)-Imjingang-Gyeonggi (central Korea)-Renge-Suo (Southwestern Japan)-Sikhote-Alin orogen along the paleo-Pacific edge of cratonal Asia. This amalgamated belt reflects collision between the Sino-Korean and Yangtze cratons on the SW portion, and accretion of outboard oceanic arcs ± sialic fragments against the NE margin. Subducted Proterozoic-Paleozoic continental and oceanic crustal complexes underwent high- and ultrahigh-pressure metamorphism at low to moderate temperatures. Tectonic slices of sialic crust episodically disengaged from the down-going plate and, driven by buoyancy, ascended rapidly to midcrustal levels from depths exceeding 90-200 km after continental collision in east-central China plus or minus Korea, and from ∼30-50 km after arrival of far-traveled oceanic terranes in SW Japan and the Russian Far East. On achieving neutral buoyancy and stalling out at 10-20 km depth, later doming, gravitational collapse, and erosion exposed parts of the high- and ultrahigh-pressure complexes. This curvilinear orogen has been segmented and offset by major and minor transverse faults. Also, regional backarc spreading opened marginal basins behind the Permo-Triassic convergent suture zone, further disturbing portions oceanward.

本文言語English
ホスト出版物のタイトルAnnual Review of Earth and Planetary Sciences
編集者Raymond Jeanloz, Arden Albee, Kevin Burke, Katherine Freeman
ページ73-110
ページ数38
DOI
出版ステータスPublished - 2007
外部発表はい

出版物シリーズ

名前Annual Review of Earth and Planetary Sciences
35
ISSN(印刷版)0084-6597

ASJC Scopus subject areas

  • 天文学と天体物理学
  • 地球惑星科学(その他)
  • 宇宙惑星科学

フィンガープリント

「Permo-Triassic collision, subduction-zone metamorphism, and tectonic exhumation along the East Asian continental margin」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル