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中国东部原特提斯构造再探究
作者:小柯机器人 发布时间:2025/4/22 15:58:30

中国科学院地质与地球物理研究所孟庆任团队研究了中国东部原特提斯构造。2025年4月21日,《国家科学评论》杂志发表了这一成果。

中国东部存在两个主要的早古生代造山带,即北秦岭-北桐柏造山带和武夷-云开造山带,它们曾经被认为是受不同板块构造过程控制的两个独立系统。北秦岭-北桐柏造山带主要由俯冲和碰撞相关的岩石组合组成,而武夷-云开造山带则主要由碰撞相关的前陆褶皱冲断系统组成。事实证明,这两个看似无关的造山带实际上是一个巨大的单一造山带的两个组成部分,这个造山带在这里被称为伏羲-女娲造山带。

基于对中国东部早古生代构造的全面研究,研究组将伏羲-女娲造山带的完整图景拼凑在一起。据推测,伏羲-女娲造山带是由最初的大陆海角-洋内弧点碰撞和华北地块与西华夏的最终完全碰撞形成的。造山带在石炭纪被撕裂,武夷-云开造山带沿着地壳规模的左旋剪切带逐渐移动。

研究组提出的构造全景图为困扰地质学家几十年的许多复杂问题提供了令人满意的解释,例如华夏西部广县造山运动的构造驱动因素、北秦岭榴辉岩的超高压变质和折返机制、北秦岭-北桐柏和武夷-云开造山带志留纪高通量岩浆作用的同时性、志留纪-早泥盆世地层的广泛缺失以及华夏西部中晚泥盆世海洋淹没的原因。伏羲-女娲造山带的发现和恢复将重塑人们对原特提斯体系构造演化的理解,并需要重新评估中国东部油气资源的潜力。

附:英文原文

Title: Proto-Tethyan tectonics in East China: A revisit

Author: Meng, Qing-Ren, Wu, Guo-Li, Wan, Bo, Zhu, Ri-Xiang, Duan, Liang, Wang, Bin, Hu, Jian-Min

Issue&Volume: 2025-04-21

Abstract: Two major Early Paleozoic orogens exist in East China, the North Qinling–North Tongbai and Wuyi–Yunkai orogens, which used to be regarded as two independent systems controlled by distinct plate tectonic processes. The North Qinling–North Tongbai orogen consists predominantly of subduction- and collision-related rock assemblages, whereas the Wuyi–Yunkai orogen is made up chiefly of collision-related foreland fold-thrust systems. It is demonstrated that the two seemingly unrelated orogens are actually two components of an immense single orogen that is here named the Fuxi–Nüwa orogen. We stitch together a complete picture of the Fuxi–Nüwa orogen based on a holistic treatment of Early Paleozoic tectonics in East China. It is surmised that the Fuxi–Nüwa orogen was created by initial continental promontory–intraoceanic arc point collision and final complete collision of the North China block with West Cathaysia. The orogen was then torn apart in the Carboniferous, with the Wuyi–Yunkai orogen gradually moving away along a crustal-scale sinistral shear zone. Our proposed tectonic panorama offers satisfactory explanations for many complexing questions that have plagued geologists for decades, such as the tectonic driver for the Kwangsian orogeny in West Cathaysia, mechanisms for ultra-high-pressure metamorphism and exhumation of the eclogized continental rocks in the North Qinling, simultaneousness of Silurian high-flux magmatism in the North Qinling–North Tongbai and Wuyi–Yunkai orogens, broad absence of Silurian–Early Devonian strata, and causes for Mid–Late Devonian marine inundation over West Cathaysia. Discovery and restoration of the Fuxi–Nüwa orogen will reshape our understanding of tectonic evolution of the Proto-Tethyan regimes, and necessitate reassessment of potentials of oil-gas resources in East China.

DOI: 10.1093/nsr/nwaf153

Source: https://academic.oup.com/nsr/advance-article/doi/10.1093/nsr/nwaf153/8117181searchresult=1

期刊信息

National Science Review《国家科学评论》,创刊于2014年。隶属于牛津学术数据库,最新IF:20.6

官方网址:https://academic.oup.com/nsr/issue?login=false
投稿链接:https://mc.manuscriptcentral.com/nsr_ms