Comparing the Upper Triassic Deep-sea Flysch of the Shannan Terrane with the Coeval Shallow Shelf Sediments of the Tethys Himalaya,Southern Tibet
Comparing the Upper Triassic Deep-sea Flysch of the Shannan Terrane with the Coeval Shallow Shelf Sediments of the Tethys Himalaya,Southern Tibet
复制标题
山南地体上三叠统深海复理石与藏南特提斯喜马拉雅同时期浅陆陆架沉积物的比较
DOI：
10.1111/1755-6724.14659
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Mattern Frank
中科院分区：
文献类型：
--
作者：
Li Xianghui;Mattern Frank
雅鲁藏布江以南喜马拉雅造山带东北部山南地体上三叠统深海复理石朗杰雪群（LG）的物源和古地理问题，近年来一直存在争议。基于早期在特提斯喜马拉雅浅海陆棚沉积中发现的上二叠统-三叠纪LG玄武岩和基性岩墙以及同时代的曲龙公巴组（QF）碎屑锆石，最近否定了以前关于LG盆地和构造的观点。我们比较了两个单位的上三叠统，我们的研究结果揭示了一些差异，差异和不一致的争论，提出了关键问题的假设和起源模式的远程冈瓦纳造山带的LG。这表明，需要更多的观察和证据，以进一步提高古地理的理解和两个单位的关系。
The provenance and paleogeography of the Upper Triassic deep-sea flysch Langjiexue Group(LG)of the Shannan Terrane in the northeastern Himalaya orogen,south of Yarlung Zangbo,have been disputed in recent years since its affinity to the Tethys Himalaya was suspected during the early 2000s. Based on the earlier discoveries of the Upper Permian-Triassic basalts and mafic dykes from the LG and of coeval detrital zircons from the Qulonggongba Formation(QF)in shallow shelf sediments of the Tethys Himalaya,the previous viewpoints on the basin and tectonics of the LG have been recently rejected. We compared the two units of the Upper Triassic,and our results reveal a number of differences,discrepancies,and inconsistencies in the debate,raising crucial questions on the postulation and provenance model of the remote Gondwanide Orogen for the LG. It is suggested that more observations and evidence are needed to further improve the paleogeographic understanding and relationship of the two units.