古亚洲洋构造域中西段新元古代晚期至晚泥盆世的构造运动
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本文为中国地质调查局项目(编号DD20179403、DD20190364、DD20220978)和陕西高校青年创新团队联合资助的成果


Tectonic movements from the late Neoproterozoic to the Late Devonian in the central- western segment of the Paleo- Asian Ocean tectonic domain
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    摘要:

    古亚洲洋构造域是由东欧克拉通和西伯利亚克拉通南侧的沟弧盆系统、主洋盆系统和卡拉库姆- 塔里木- 华北克拉通北侧的大陆边缘系统组成的复合型造山带,其动力学体系波及范围涉及萨彦- 额尔古纳造山系、乌拉尔- 天山- 兴蒙造山系,昆仑- 祁连- 秦岭造山系等,这一地域保存了新元古代晚期到泥盆纪造山过程的丰富信息,是研究古亚洲洋演化的重要窗口。本文以古亚洲洋动力学体系波及范围的中西段为研究对象,在总结前人研究成果的基础上,将新元古代晚期至晚泥盆世的构造运动划分为贝加尔造山运动、萨拉伊尔(兴凯)造山运动、哈萨克斯坦造山运动、加里东造山运动和天山造山运动:① 贝加尔造山运动使图瓦地块和阿巴坎地块拼接到西伯利亚克拉通南缘,表现为增生造山;② 萨拉伊尔造山运动使阿尔泰地块和南蒙古地块先后拼贴在西伯利亚克拉通南缘,形成萨彦- 额尔古纳增生造山系,也属于增生造山运动;③ 出现在中奥陶世—晚奥陶世的哈萨克斯坦造山运动使科克切塔夫地块、斋桑地块、克孜勒库姆地块、巴尔喀什- 伊犁地块、伊塞克地块、中天山地块及准噶尔地块之间的洋盆封闭,形成哈萨克斯坦联合陆块;④ 发生在志留纪末(东西昆仑则持续到中泥盆世末期的加里东造山运动使阿中地块、中祁连地块、南祁连地块、柴达木地块、西秦岭联合地块、秦岭地块和上扬子陆块拼贴在中轴大陆块区南缘,造成中轴大陆块区南缘大陆增生;⑤发生在中泥盆世末—晚泥盆世的天山造山运动使中轴大陆块区中西段与扩大后的西伯利亚陆块拼接在一起。本研究加深了对古亚洲洋复杂构造历史的理解及对区域地质的影响。

    Abstract:

    The Paleo- Asian Ocean tectonic domain represents a composite orogenic belt encompassing accretionary arc- basin systems south of the East European Craton, the primary oceanic basin, and the continental margin system north of the Karakum- Tarim- North China Craton. This dynamic system hosts significant orogenic systems, including the Sayans- Erguna, Ural- Tianshan- Xingmeng, and Kunlun- Qilian- Qinling orogenic systems. The region preserves valuable geological records of orogenic processes from the late Neoproterozoic to the Devonian, providing critical insights into the evolution of the Paleo- Asian Ocean. This paper focuses on the central- western segment of the Paleo- Asian Ocean' s dynamic system. It synthesizes previous research findings and categorizes tectonic movements from the late Neoproterozoic to thelate Devonian into five key orogenic events: ① The Baikal orogeny, which facilitated the assembly of the Tuva and Abakan blocks onto the southern margin of the Siberian Craton, characterized by accretionary processes. ② The Sayan- Erguna orogeny, marked by the successive attachment of the Altai and South Mongolia blocks to the southern margin of the Siberian Craton, resulting in the formation of the Sayans- Erguna accretionary orogenic system. ③ The Kazakhstan orogeny, occurring during the Middle to Late Ordovician, which led to the closure of the oceanic basin between the Kokchetav, Zaisan, Kyzylkum, Balkhash- Ili, Issyk, central Tianshan, and Dzungarian blocks, ultimately forming the Kazakhstan united landmass. ④ The Caledonian orogeny, which took place at the end of the Silurian (continuing in the eastern and western Kunlun until the end of the Middle Devonian), resulted in the assembly of the Azhong, central Qilian, South Qilian, Qaidam, West Qinling united, Qinling, and Upper Yangtze blocks onto the southern margin of the central continental block area, contributing to continental accretion. ⑤ The Tianshan orogeny, occurring from the end of the Middle Devonian to the Late Devonian, which connected the central- western segment of the central continental block area with the expanded Siberian landmass. This study enhances our understanding of the complex tectonic history of the Paleo- Asian Ocean and its implications for regional geology.

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孟勇,张欣,陈奋宁,李佐臣,冯益民,祁尧刚,郑若蕾.2025.古亚洲洋构造域中西段新元古代晚期至晚泥盆世的构造运动[J].地质学报,99(1):58-77.
MENG Yong, ZHANG Xin, CHEN Fenning, LI Zuochen, FENG Yimin, QI Yaogang, ZHENG Ruolei.2025. Tectonic movements from the late Neoproterozoic to the Late Devonian in the central- western segment of the Paleo- Asian Ocean tectonic domain[J]. Acta Geologica Sinica,99(1):58-77.

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  • 收稿日期:2024-09-22
  • 最后修改日期:2024-11-20
  • 录用日期:2024-12-03
  • 在线发布日期: 2025-01-16
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