Strengthening the argument for a large Greater India
Strengthening the argument for a large Greater India
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DOI：
10.1073/pnas.2305928120
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发表时间：
2023-08
影响因子：
11.1
通讯作者：
J. Meng;S. Gilder;X. Tan;Xin Li;Yalin Li;Hui Luo;Noritoshi Suzuki;Zihao Wang;Yuchen Chi;Chunyang Zhang;Chengshan Wang
中科院分区：
文献类型：
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作者：
J. Meng;S. Gilder;X. Tan;Xin Li;Yalin Li;Hui Luo;Noritoshi Suzuki;Zihao Wang;Yuchen Chi;Chunyang Zhang;Chengshan Wang
确定大印度的大小是重建印亚碰撞的运动学和时间所需的关键参数。这篇文章解决了围绕桑丹林剖面的年龄和古地理的不同解释，桑丹林剖面是大印度的一部分，现在夹在印度和亚洲板块之间。我们的地质数据澄清了桑丹林岩石的年龄，而基于我们的古地磁数据和修正的年龄模型的古地理重建表明，大印度在俯冲到亚洲之下之前作为一个单一板块延伸了2000至3000公里。
Significance Defining the size of Greater India is a critical parameter needed to reconstruct the kinematics and timing of the India–Asia collision. This article resolves discrepant interpretations surrounding the age and paleogeography of the Sangdanlin section, which was part of Greater India, now sandwiched between the Indian and Asian plates. Our geologic data clarify the ages of the rocks at Sangdanlin, while paleogeographic reconstructions stemming from our paleomagnetic data and revised age model demonstrate Greater India extended 2,000 to 3,000 km as a single plate before subducting under Asia. The existence of such a large crustal area argues against scenarios advocating that the Neotethys Ocean was subdivided into numerous, independent tectonic blocks that subsequently accreted to the southern margin of the Tibetan Plateau.