雁列构造是走滑断层存在的充分判据?——来自平面砂箱模拟实验的启示  

IS EN-ECHELON STRUCTURE A SUFFICIENT CRITERION FOR THE EXISTENCE OF STRIKE-SLIP FAULT? —— INSIGHTS FROM THE PLANE SANDBOX ANALOG EXPERIMENTS

作　　者：朱战军[1] 周建勋[1] 

机构地区：[1]石油大学.北京资源与信息学院,北京102200

出　　处：《大地构造与成矿学》2004年第2期142-148,共7页Geotectonica et Metallogenia

基　　金：国家自然科学基金 ( 4 9872 0 68)资助

摘　　要：多年来 ,雁列构造被作为走滑作用的结果、并得到物理模拟实验模型的支持 ,通常作为走滑断层的判据加以运用。本文根据针对黄骅盆地所设计的曲折边界基底均匀伸展模型和针对焉耆盆地所设计的基底均匀收缩斜向挤压模型的砂箱实验结果 ,给出了雁列构造另外的成因解释。认为雁列构造的成因并非局限于基底走滑作用 ,基底均匀变形条件下的斜向伸展或斜向挤压作用均可形成雁列构造 ,因此雁列构造不能作为走滑断层存在的充分判据。For many years, en-echelon structure has been considered as the result of strike-slip activity, which has been approved by the experimental models of physical simulation. As a rule, en-echelon structure has been regarded as a criterion for the existence of strike-slip fault and has been applied extensively. A sandbox model with sinuosity border and homogeneous extension base was designed for the Huanghua basin, and a sandbox model with ho-(mogeneous) contraction base and oblique compression was designed for the Yanqi basin. Experimental results supplied an alternative cause of the formation of en-echelon structure. The cause of formation of en-echelon structure can’t be localized only on strike-slip activity in basement. In the case of homogeneous deformation in basement, en-echelon structures can be formed by oblique extension or oblique compression. On this account, en-echelon structure can’t be regarded as a sufficient criterion for the existence of strike-slip faults.

关 键 词：雁列构造 走滑断层 砂箱模拟 构造物理 

分 类 号：P554[天文地球—构造地质学]