山前断褶带构造变形与横向河道作用关系研究  

Relationship Between Fold-thrust Belt Tectonic Deformation and Transverse River

作　　者：杨甫[1] 陈刚[1] 丁超[1] 毛小妮[1] 李楠[1] 李岩[1] 

机构地区：[1]西北大学地质学系,西安710069

出　　处：《科技导报》2011年第31期29-33,共5页Science & Technology Review

基　　金：国家重点基础研究发展计划项目(2003CB214607);国家留学基金委西部计划项目(留金出[2007]3045);留学人员科技活动择优资助项目

摘　　要：构造变形与地表过程之间关系是近年来的研究热点,并取得了一些进展,特别是在较小空间尺度上的山前褶皱冲断带变形与地表过程耦合关系研究方面,提出了横向河流的切割作用影响背斜构造变形的新认识,改变了构造变形对地表作用单向控制的传统认识。背斜变形样式受地表过程和构造变形共同影响,背斜变形与横向河流切割之间存在双向耦合关系。山前带背斜构造变形区的地表河流是通过改变上覆物质的分布影响褶皱变形。在山前带背斜构造变形和河流作用关系时,不仅应考虑构造变形对河流的影响,而且要考虑河流的侵蚀下切作用以及相应时间内气候因素的影响,这为盆山耦合动力学研究提供了新思路。The relation between tectonic deformation and surface process is a research front in recent years. European geologists study on the relationship between tectonic deformation and surface process and make some new progress, especially a coupling relationship between fold thrust belt deformation and surface processes at the smaller length scale. It has altered the traditional concept that tectonic deformation effects on surface processes with one-way control, and the new idea that the transverse river cutting could influence anticline deformation style is put forward. Deformation is influenced by surface processes and terrain slope （tectonic deformation）, and there is a two-way coupling between the transverse river cutting and anticline deformation. The research with a numerical model shows that surface processes （mainly fluvial） effect deformation folding through the distribution change of the overlying material weight. Anticline deformation styles are not strongly influenced by lateral erosion of river incision. In order to study the interplay between structure deformation and transverse river at the piedmont region, it should not only consider the influence of tectonic deformation on the river, but also take the active role of river incised erosion, as well as climate factors into account. Therefore, the results provide a new thinking for basin and mountain coupling dynamics.

关 键 词：褶皱冲断带 地表过程 横向河流 

分 类 号：P542[天文地球—构造地质学]