安徽地质2026，Vol.36Issue(3)：193-197,5.
郯庐断裂带韧性剪切流变特征解析
Analysis on Ductile Shear Rheological Characteristics of the Tan-Lu Fault Zone:A Case Study of the Western Margin of the Sulu Orogenic Belt
摘要
Abstract
The rheological characteristics of ductile shear within the Tan-Lu Fault Zone(TLFZ)have not been systematically characterized to date.This study focuses on the TLFZ ductile shear zone exposed along the western margin of the Sulu Orogenic Belt(SOB),and carries out quantitative systematic investigation through field geological mapping,microstructural analysis,as well as quantitative constraints on deformation temperature,differential stress,strain rate,finite strain and shear kinematics.The results show that the ductile shear deformation in the study area occurred at temperatures of 500-570℃,with differential stress ranging from 14.05 to 19.09 MPa and strain rate falling between 10-12.06 and 10-12.63 s⁻¹.Finite strain measurements indicate that the shear zone records intense strike-slip shear with extensional affinity.Kinematic vorticity values range from 0.767 to 0.833,confirming that it is a thinning-type general shear zone dominated by simple shear.Comprehensive analysis reveals that the TLFZ ductile shear along the western SOB margin developed under medium-high temperature,low differential stress,and slow,low-strain-rate deformation,and is classified as a thinning sinistral strike-slip shear zone dominated by simple shear.This study quantitatively defines the rheological characteristics of the regional shear zone,clarifies its formation conditions and deformation mechanisms,and provides a quantitative foundation for understanding the geodynamic evolution of the TLFZ.关键词
郯庐断裂带/苏鲁造山带/剪切流变/构造解析Key words
Tan-Lu Fault Zone/Sulu Orogenic Belt/Shear rheology/Structural analysis分类
天文与地球科学引用本文复制引用
李振伟,马涛..郯庐断裂带韧性剪切流变特征解析[J].安徽地质,2026,36(3):193-197,5.基金项目
矿山地质灾害防治重点实验室开放基金"安徽五河地区金矿构造控矿研究及对金成矿的指示意义"(编号:2024-MGDP-07)和战略性矿产资源深部探测与评价利用安徽省重点实验室开放基金"安徽大别山东缘地区构造变形解析对郯庐断裂带起源的指示意义"(编号:PA2025GDSK0088)资助 （编号:2024-MGDP-07）
