塔里木地块前寒武纪地质研究进展评述
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本文为国家自然科学基金资助项目(编号NSFC41172175)的成果。


A Review on Precambrian Tectonic Evolution of Tarim Block: Possibility of Interaction between Neoproterozoic Plate Subduction and Mantle Plume
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  • 南京地质矿产研究所,南京,210016    
  • 天津地质矿产研究所,天津,300170    
  • 南京地质矿产研究所,南京,210016    
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    摘要:

    塔里木地块是我国三大主要陆块之一。它是一个具有完整的前寒武纪基底且发育了良好的新元古代盖层沉积的大陆块体。笔者等综合了近十年来中外地质学家对塔里木前寒武系的研究成果,并对这些取得的资料进行系统分析,概括了塔里木前寒武纪构造演化阶段、过程以及塔里木在前寒武纪时期与全球性的超大陆汇聚和裂解事件的沉积、变质、岩浆及构造作用的耦合关系。特别指出,笔者等详细地讨论了含蓝片岩的阿克苏群可能的沉积时代、发生蓝片岩相变质的时间,并结合对新元古代岩浆事件的综合分析,提出塔里木在新元古代早期(900Ma)汇聚到澳大利亚北缘,成为Rodinia超大陆的一部分。在新元古代中—晚期,沿塔里木北缘的俯冲可能一直持续到760Ma。820~760Ma期间,新元古代Rodinia超级地幔柱和板块俯冲共同制约了塔里木北缘的岩浆作用和变质作用。这一模式可能对认识华南地区新元古代复杂的岩浆作用具有启示意义。

    Abstract:

    The Tarim Block is one of the main three continental blocks (plates) in China. It has typical double layers structure consisting of the Precambrian basement and Neoproterozoic to Cambrian cover. In this contribution, the authors integrated the recently published Precambrian studies of the Tarim block and have a detailed analyzing on these data. Based on the study herein, we constructed its Precambrian evolution stages, courses and its tectono magmatic—metamorphic concurrence to the global scale suppercontinent evolution. Importantly, we discussed the sedimentary and metamorphic ages of the blueschist bearing Aksu Group according to recently obtained geochronological data and the regional geology, in combination with the previous studies on the Neoproterozoic igneous rocks, we argued that the Tarim Block could assemblage to the northern side of the Australia during late Mesoproterozoic to early Neoproterozoic (1000~900 Ma). Nevertheless, the subduction along the northern side of the Tarim Block could last till to 760 Ma and during 820~760 Ma, interaction between plate subduction and the Rodinian plume resulted the intriguing magmatic—metamorphic events. This new model may shed a light on the international controversy on the Neoproterozoic evolution of the South China.

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张传林,李怀坤,王洪燕.2012.塔里木地块前寒武纪地质研究进展评述[J].地质论评,58(5):923-936,[DOI].
.2012. A Review on Precambrian Tectonic Evolution of Tarim Block: Possibility of Interaction between Neoproterozoic Plate Subduction and Mantle Plume[J]. Geological Review,58(5):923-936.

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