福建屏南长宦——北墘韧性剪切带变形特征  

Deformation Characteristics of Changhuan-Beiqian Ductile Shear Zone in Pingnan County,Fujian Province

作　　者：寇贵存 Kou Guicun(Fujian Provincial No.197 Geological Team,Quanzhou,362500)

机构地区：[1]福建省197地质大队,泉州362500

出　　处：《福建地质》2025年第1期13-20,共8页Geology of Fujian

摘　　要：长宦—北墘韧性剪切带处于闽东火山断坳带的一条北东东向展布的韧性剪切带内,由中心到两侧依次发育超糜棱岩、糜棱岩、初糜棱岩和糜棱岩化岩石一系列动力变质岩。运动性质早期为左行走滑,晚期叠加右行韧性变形。在野外地质调查工作的基础上,通过宏观和微观对韧性剪切带的变形特征进行分析,并对其剪切作用类型、古差异应力值、变形温度、变形深度和总位移量等特征进行了计算分析,综合区域地质资料表明长宦—北墘韧性剪切带变形活动时限在晚石炭世—中三叠世之间,属于华力西—印支期,为福建境内华力西—印支期的构造运动提供了信息。Changhuan-beiqian ductile shear zone located in the Volcanic fault depression belt in east Fujian Province,it is a NEE ductile shear zone,from inside to outside,a series of dynamic metamorphic rocks developed,such as mylonitized rock,sproromylonite,mylonite and ultramalonite developed in sequence.The kinematic properties are the superposition of early left-walking slip and late right-moving ductile deformation.On the basis of field geological investigation,this paper analyzes the characteristics of ductile shear zone,such as shear action type,paleodifferential stress value,deformation temperature,deformation depth and total displacement.The comprehensive regional geological data show that the deformation time of ductile shear belt in Changhuan-Beiqian was between Late Carboniferous and Middle Triassic,which belongs to the Hercyn-Indosinian period,and provides information for the Hercyn-Indosinian tectonic movement in Fujian Province.

关 键 词：韧性剪切带 变形特征 糜棱岩 华力西—印支期 福建屏南 

分 类 号：P548[天文地球—构造地质学]