Preliminary Reconstruction of Tectonic Paleogeography of Tarim Basin and Its Adjacent Aeras from Cambrian to Triassic,NW China
Preliminary Reconstruction of Tectonic Paleogeography of Tarim Basin and Its Adjacent Aeras from Cambrian to Triassic,NW China
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发表时间：
2015
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通讯作者：
Liu Jiangha
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作者：
Liu Jiangha
寒武纪至三叠纪期间，塔里木盆地从东冈瓦纳超大陆西北缘裂谷，漂移至劳伦超大陆。其北缘为被动大陆环境，南缘主要为弧后前陆盆地或因不同块体或地体增生而形成的隆起。塔里木盆地一级层序、区域不整合事件和次级构造单元的构造演化都与板块边界的构造活动和板块运动轨迹的变化有关。沿板块边界的挤压造山运动引起盆地隆起，岩相古地理格局发生显着变化。早二叠世石炭系地层被地幔柱垂直活动侵蚀呈穹顶状并抬升，形成了大面积的火成岩省。塔里木叠合盆地是不同时期小块体多原型盆地复合的产物，与其他板块不同，受横向运移变化影响，没有垂向复合。塔里木地块体积小于全球其他典型克拉通盆地，由于与哈萨克斯坦/阿尔金-祁连、羌塘等邻近地块的碰撞，经历了强烈的构造改造，构造变形强烈，从马吉安向内延伸。
Tarim basin rifted from the northwest margin of East Gondwana supercontinent and drifted to Laurentia supercontinent during the period from Cambrian to Triassic. While its north margin is passive continental environment and south mainly is back-arc foreland basin or uplift as a result of different blocks or terranes accretion. First-order sequences,regional uncomformity events and tectonic evolution of secondary tectonic units in Tarim basin all related to tectonic activity in plate boundary and change of plate motion track. Compressional orogeny along plate boundary caused uplifts in the basin and significant change of lithofacies paleogeography framework. Carboniferous strata were erosioned in dome shape and uplifted by vertical activity of mantle plume,which led to the large igneous provinces in the early Permian. Tarim superimposed basin,product of multiprototype bains in small blocks composited in the different periods,differed from that in the other plates with no vertical composite influenced by variations in the lateral migration. Tarim block is smaller than other global typical craton basins,underwent tectonic reworking intensely because of the collision with adjacent blocks,such as Kazakhstan / Altyn- Qilian and Qiangtang block,with strong tectonic deformation extending from magin to the inside.