Revisiting the tectonic evolution of South China: interaction between the Rodinia superplume and plate subduction?
Revisiting the tectonic evolution of South China: interaction between the Rodinia superplume and plate subduction?
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DOI：
10.1111/ter.12025
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发表时间：
2013-06
期刊：
影响因子：
2.4
通讯作者：
Chuan-Lin Zhang;Huaibin Li;M. Santosh
中科院分区：
文献类型：
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作者：
Chuan-Lin Zhang;Huaibin Li;M. Santosh
利用新的野外观测资料和锆石U-Pb年龄数据，结合前人的研究成果，对扬子地块和华夏地块的拼装过程进行了评价。结果表明，在1.0Ga之前，该过程开始于西部，并向东迁移，最终在830-820 Ma左右沿缝合线发生融合。在850-820 Ma期间，可能始于850 Ma的地幔热柱和扬子地块南缘向北的板块俯冲共同控制了扬子地块中东部弧后盆地的形成和闭合，以及多样而复杂的岩浆活动。当Rodinia柱对新元古代中晚期盆地及其相关岩浆脉冲的演化起主导作用时，弧后盆地和褶皱“基底”层序上的准同步裂谷盆地的闭合标志着俯冲的结束。
New field observations and zircon U‐Pb age data, combined with previous studies, are employed here to evaluate the process of assembly of the Yangtze and Cathaysia Blocks. We show that the process started from the west prior to 1.0 Ga and migrated eastward with the final amalgamation along the suture at around 830–820 Ma. During the period of 850–820 Ma, both the mantle plume which possibly started at 850 Ma and the north‐directed plate subduction along the southern margin of the Yangtze Block controlled the formation and closure of a back‐arc basin along the middle to eastern segment of the Yangtze Block, as well as the diverse and complex magmatic activities. The closure of the back‐arc basin and almost synchronous rift basin overlying the folded “basement” sequence mark the termination of subduction when the Rodinia plume exerted a dominant control on the evolution of the middle to late Neoproterozoic basin and the related magmatic pulses.