中国科学院地球科学创新研究院林伟团队研究了中印造山带及其地球动力学。相关论文于2025年3月11日发表在《中国科学：地球科学》杂志上。

传统的（狭义）印支造山运动或“印支运动”是指越南东北部的宋蔡带。随着研究的深入，印支期造山运动与古特提斯闭合有关，被认为是多个微陆块拼合形成的典型造山运动。中印造山带由哀牢山、宋马和宋茶构造带组成，它们横跨越南北部和中国云南-广西地区。

根据构造和同位素年代学分析，这三个带在构造框架、几何形状、运动学和变质相方面表现出高度的一致性。蛇绿岩的年龄也有很好的相关性；甚至可以解释为碰撞初始阶段的变形时间也大多集中在246至240Ma之间。除新生代红河和奠边府走滑断层的改造外，三个缝合带在中生代早期以统一的西南俯冲极性连接，导致完全俯冲和碰撞造山。

在此基础上，研究组提出了中印造山带的整体构造模型，并讨论了古地球系中支的演化和地球动力学。这导致了特提斯构造域的演化和超大陆的聚集和裂谷。

附：英文原文

Title: Indochina orogenic belt and related geodynamics

Author: Wei LIN, Yin WANG, Fei LIU, Lingtong MENG, Qinying WU, Zhao GUO, Wei WEI, Yang CHU, Jinyan LI, Qingchen WANG, Michel FAURE, Vuong VAN NGUYEN

Issue&Volume: 2025/03/11

Abstract: The traditional (narrow sense) Indosinian orogeny or “Indosinian Movement” refers to the Song Chay belt in northeastern Vietnam. As research has advanced, the Indosinian orogeny has been related to the closure of the Paleo-Tethys and is considered a typical orogeny formed by the amalgamation of multiple microcontinental blocks. The Indochina orogenic belt consists of the Ailaoshan, Song Ma, and Song Chay (tectonic) belts, which extend across northern Vietnam and the Yunnan-Guangxi region of China. Based on structural and isotopic geochronological analyses, these three belts exhibit a high degree of consistency in tectonic frame, geometry, kinematics, and metamorphic facies. The ages of the ophiolites are also well correlated; even the time of deformation, which could be interpreted as the initial stage of the collision, is mostly concentrated between 246 and 240Ma. Excluding the modification of the Cenozoic Red River and Dien Bien Phu strike-slip Faults, the three suture zones were connected during the Early Mesozoic with a unified southwestward subduction polarity, resulting in complete subduction and collisional orogeny. Based on this work, we propose an overall tectonic model for the Indochina orogenic belt and discuss the evolution and geodynamics of the middle branch of the Paleo-Tethys. This resulted in the evolution of the Tethyan tectonic domain and aggregation and rifting of the supercontinents.

DOI: 10.1007/s11430-024-1499-5

Source: https://www.sciengine.com/10.1007/s11430-024-1499-5