Multiple Stages of Strike-slip Movement and the Propagation of the Tan-Lu Fault Zone,East Asia  

作　　者：ZHANG Shuai DAI Lu ZHU Guang 

机构地区：[1]School of Resource and Environmental Engineering,Hefei University of Technology,Hefei 230009,China

出　　处：《Acta Geologica Sinica(English Edition)》2025年第2期352-369,共18页地质学报(英文版)

基　　金：funded by the Ministry of Science and Technology of the People's Republic of China(Grant 2024ZD1001301);the National Natural Science Foundation of China(Grants 42272241,42102254 and 41830213);the Fundamental Research Funds for the Central Universities(Grant JZ2023HGTB0238).

摘　　要：The approximately 3000 km long Tan-Lu fault zone(TLFZ)in East Asia is the longest continental strike-slip fault zone in the world and exemplifies how such a fault zone forms and propagates on a continental scale.Structural and geochronological data from the TLFZ and surrounding regions indicate that the fault zone originated as NE/SW-striking sinistral ductile shear zones along an oblique continental convergence margin during the Triassic indentation collision between the North China Craton and the Yangtze Block.The Triassic fault zone,with a total length of about 720 km between the Dabie and Sulu orogens,exhibited an apparent sinistral offset of approximately 300 km along the TLFZ.The second stage of sinistral movement occurred in the earliest Late Jurassic,reactivating the pre-existing southern segment and propagating northwards to the southern coastline of present-day Bohai Bay,as well as forming a significant portion of the Dunhua-Mishan fault zone.The third stage of sinistral movement,in the earliest Early Cretaceous,was the most intense strike-slip movement of the Mesozoic,leading to the complete linkage of the TLFZ.This stage included further northward propagation of the southern-middle segment,both southward and northward propagation of the Dunhua-Mishan fault zone,as well as the formation of the entire Yilan-Yitong fault zone.The fourth stage,in the earliest Late Cretaceous,involved the reactivation of the entire TLFZ.Following its Triassic origin due to the indentation collision,the subduction of the Paleo-Pacific Plate and the subduction and closure of the Mongol-Okhotsk Ocean were responsible for the multi-stage sinistral movements from the Late Jurassic to the Cretaceous.The evolution of the TLFZ demonstrates that a continental-scale strike-slip fault zone(>1000 km long)forms through multiple stages of propagation and linkage in dynamic settings of plate convergence.

关 键 词：Tan-Lu fault zone ORIGINATION sinistral movement PROPAGATION through-going termination 

分 类 号：P542[天文地球—构造地质学]