Subsidence characteristics of Turpan Basin and its tectonic implications

• 作 者: 邵磊 K.Stattegger 李文厚 B.J.Haupt 柳益群
• 机 构: Laboratory of Marine Geology, Tongji University, Shanghai 200092, China,Geological and Paleontologic
• 出 处: Progress in Natural Science
• 发表日期: 1998年05期
• 关键词: Triassic Jurassic Cretaceous Permian tectonic subsidence Cenozoic orogenic evolv

The Turpan Basin, a back-arc basin formed during Late Permian, underwent first thermal subsidence and then flexure subsidence. The thermal subsidence took place during Late Permian and Early Triassic following the period of magmatic activities in this region. The flexural subsidence was throughout the Middle Triassic to Early Tertiary induced by orogenic movements which produced periods of high subsidence rates. Accelerated subsided periods occurred during Late Triassic/Early Jurassic, Late Jurassic, terminal Jurassic/initial Cretaceous, and terminal Cretaceous/early Cenozoic, indicating the effect of the collision and accretion onto the south Asian continental margin of the Qiangtang Block in Late Triassic/Early Jurassic, the Gangdise Block in Late Jurassic and terminal Jurassic/initial Cretaceous, and the Indian subcontinent in the terminal Cretaceous/early Cenozoic. There are relatively large breaks in the variation of the petrologic and geochemical data among these events. The Turpan Basin evolved f

The Turpan Basin, a back-arc basin formed during Late Permian, underwent first thermal subsidence and then flexure subsidence. The thermal subsidence took place during Late Permian and Early Triassic following the period of magmatic activities in this region. The flexural subsidence was throughout the Middle Triassic to Early Tertiary induced by orogenic movements which produced periods of high subsidence rates. Accelerated subsided period occurred during Late Triassic / Early Jurassic, Late Jurassic, terminal Jurassic / initial Cretaceous, and terminal Cretaceous / early Cenozoic, indicating the effect of the collision and accretion onto the south Asian continental margin of the Qiangtang Block in Late Triassic / Early Jurassic, the Gangdise Block in Late Jurassic and terminal Jurassic / initial Cretaceous, and the Indian subcontinent in the terminal Cretaceous / early Cenozoic. There are relatively large breaks in the variation of the petrologic and geochemical data among these events. The Turp an Basin evolved f