Xie, Fenquan, Xiao, Wenzhou, Sami, Mabrouk, Sanislav, Ioan V., Ahmed, Mohamed S., Zhang, Chenguang, Wang, Yongkui, Yan, Bingpeng, Hu, Bing, Li, Ning, and Fathy, Douaa (2024) Tectonic evolution of the Northeastern Paleo-Tethys Ocean during the late Triassic: insights from depositional environment and provenance of the Xujiahe formation. Frontiers in Earth Science, 12. 1444679.

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Abstract

The Triassic tectonic evolution and affinity among the Yangtze Block, Qinling Orogenic Belt and Songpan-Ganzi Terrane remain subjects of ongoing scientific debate. In this context, the sedimentary rocks of Xujiahe Formation (second segment) (T3x2) represent an ideal case for addressing this issue. In this study, new stratigraphic, geochemical and detrital zircon analyses have been conducted on two sections of the T3x2. The stratigraphic assemblage and features suggests a braided delta as the depositional setting. Whole-rock geochemical results indicate that the sandstones from the T3x2 exhibit moderate palaeo-weathering and primarily originate from upper crustal felsic rocks, mostly S-type granites. The detrital zircons within these sandstones display distinctive age peaks at intervals of 200–300 Ma, 700–900 Ma, and 1800–2000 Ma, similar to those from the Qinling Orogenic Belt. Both the clastic particle composition and whole-rock geochemistry indicates that the T3x2 sections were deposited in a tectonic environment transitioning from a passive to an active continental margin, highlighted by a braided delta influenced by rivers flowing from the northeast to the southwest.

Item ID:	83462
Item Type:	Article (Research - C1)
ISSN:	2296-6463
Copyright Information:	© 2024 Xie, Xiao, Sami, Sanislav, Ahmed, Zhang, Wang, Yan, Hu, Li and Fathy. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
Date Deposited:	19 Aug 2024 23:22
FoR Codes:	37 EARTH SCIENCES > 3705 Geology > 370511 Structural geology and tectonics @ 40% 37 EARTH SCIENCES > 3705 Geology > 370510 Stratigraphy (incl. biostratigraphy, sequence stratigraphy and basin analysis) @ 30% 37 EARTH SCIENCES > 3705 Geology > 370502 Geochronology @ 30%
SEO Codes:	28 EXPANDING KNOWLEDGE > 2801 Expanding knowledge > 280107 Expanding knowledge in the earth sciences @ 100%
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