石香肠构造的多种地质构造背景  

The Diverse Tectonic Background of Boudinage Structures

作　　者：王冉[1,2] 肖宙轩 林靖愉 李路 崔文玲 WANG Ran;XIAO Zhouxuan;LIN Jingyu;LI Lu;CUI Wenling(School of Earth Science and Resources,Chang’an University,Xi’an 710054,Shaanxi,China;Key Laboratory for the Study of Focused Magmatism and Giant Ore Deposits,MLR,Xi’an 710054,Shaanxi,China;Shenzhen Earthquake Administrator,Shenzhen 518038,Guangdong,China)

机构地区：[1]长安大学地球科学与资源学院,陕西西安710054 [2]国土资源部岩浆作用成矿与找矿重点实验室,陕西西安710054 [3]深圳市地震局,广东深圳518038

出　　处：《大地构造与成矿学》2018年第5期777-785,共9页Geotectonica et Metallogenia

基　　金：国家自然科学基金项目(41402044)资助

摘　　要：石香肠构造与构造背景之间的关系尚未有过详细的综合分析和总结,而廓清石香肠构造的构造背景对于解析区域地质构造演化具有十分重要的意义。本文通过文献调研和野外观测,依据构造变形的MEST法则,得出石香肠构造的五种构造背景:1)缩短构造背景,主要发育在纵弯褶皱的翼部; 2)伸展构造背景,石香肠构造主要发育在褶皱转折端; 3)走滑构造背景,主要发育在剪切带中,石香肠块段一般为剪切滑动所围限,有反向和同向两种多米诺剪切型式,具体取决于剪切带边界与石香肠序列之间的几何学角度; 4)压实作用或者地振动构造背景,主要发育在水平岩层中,无与之配套的高一级褶皱发育;5)从伸展或走滑转为缩短构造背景,主要发育在陡倾岩墙(脉)及其围岩中,无与之配套的高一级褶皱发育。这种多样性暗示,欲准确解析露头尺度的石香肠构造所指示的区域构造应力场,必须将其构造型相和产出的构造位置结合起来。The relationship between boudinage structures and tectonic background has not yet thoroughly reviewed.Distinguishing the tectonic backgrounds of boudinage structures is helpful to decipher the tectonic evolution.There are five types of background for boudinage in term of the MEST Law of structure deformation:1)contraction structure settings,where boudinages mainly develop in the limbs of buckle fold;2)extensional structure settings,where boudinages mainly occur in fold hinge zone of bending;3)gravity tectonic or vibrating ground motion settings,where boudinages mainly develop in flat strata;4)contraction settings following extension,where boudinages mainly develop in steep-dipping dike(vein)and its wall rock;5)strike-slip settings,where boudinages mainly occur in shear zone,block of boudinages are usually limited by shear slip.The diverse tectonic backgrounds suggest that structure styles that host the boudinages are extremely important in the interpretation of regional tectonic stress field on basis of outcrop-scale boudinage structures.

关 键 词：石香肠构造 大地构造 多样性 构造组合 

分 类 号：P542[天文地球—构造地质学]