Accretionary orogenesis triggered by collision across continent distance: Evidence from the Proto‐Tethyan West Kunlun, China

IF 2.2 3区 地球科学 Q2 GEOSCIENCES, MULTIDISCIPLINARY Terra Nova Pub Date : 2023-01-10 DOI:10.1111/ter.12643
Yan-Jun Wang, Weiguang Zhu, Zhenghong Zhang, Kang Yang, Chengquan Wu, Jinhong Xu, Chengbiao Leng, Jian‐Bing Xu
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Abstract

Proto‐Tethyan orogenic processes prior to the late Ordovician collision remain unclear. Both whole‐rock La/Yb‐ and zircon Eu/Eu*‐based crustal thickness proxies along with petrological and geological observations were used to reconstruct mountain‐building history for the West Kunlun orogenic belt, China, over the span of Early Palaeozoic. Here, we demonstrate that Proto‐Tethyan West Kunlun crust has observed significant accretionary orogeneses at 520–480 Ma and 480–450 Ma and collisional orogenesis at 450–400 Ma. The 520–480 Ma accretionary orogenesis in West Kunlun together with the coeval Delamerian accretionary contractional orogenesis in eastern Australia were simultaneously induced by continent‐continent collisions that welded the Gondwana landmass. Ca. 440 Ma docking of Tarim and its eastern neighbouring blocks along the northern margin of Gondwana in turn triggered the Lachlan accretionary orogenesis along the opposite margin. This study highlights that accretionary orogenesis could be a manifestation of far‐field compressional stress from continent‐continent collision.
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跨大陆距离碰撞引发的增生造山作用:来自原特提斯西昆仑的证据
奥陶纪晚期碰撞前的原特提斯造山过程尚不清楚。基于全岩La/Yb和锆石Eu/Eu*的地壳厚度指标以及岩石学和地质观测,被用于重建中国西昆仑造山带早古生代的造山历史。在这里,我们证明了原特提斯-西昆仑地壳在520–480年观测到了显著的增生造山带 马和480–450 Ma与450–400年的碰撞造山作用 马。520–480 西昆仑的Ma增生造山运动与澳大利亚东部同时代的Delamerian增生收缩造山运动同时是由大陆-大陆碰撞焊接冈瓦纳大陆引起的。第440章 塔里木与冈瓦纳大陆北缘的东部相邻地块的Ma对接,反过来又引发了冈瓦纳山脉北缘的拉克兰增生造山运动。这项研究强调,增生造山作用可能是大陆碰撞产生的远场挤压应力的表现。
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来源期刊
Terra Nova
Terra Nova 地学-地球科学综合
CiteScore
4.80
自引率
8.30%
发文量
59
审稿时长
2.3 months
期刊介绍: Terra Nova publishes short, innovative and provocative papers of interest to a wide readership and covering the broadest spectrum of the Solid Earth and Planetary Sciences. Terra Nova encompasses geology, geophysics and geochemistry, and extends to the fluid envelopes (atmosphere, ocean, environment) whenever coupling with the Solid Earth is involved.
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