关注三维交切构造——出露地表的大陆岩石圈构造解耦面  

Paying attention to the 3 Dimensional crossing structure of the lithosphere——Exposed continental lithospheric decoupling surface

作　　者：马文璞[1] 王果胜[1] 

机构地区：[1]中国地质大学,北京100083

出　　处：《地质通报》2004年第9期940-946,共7页Geological Bulletin of China

基　　金：国家自然科学基金(49902017)资助。

摘　　要：大陆内部弥散性的变形表明经典板块构造理论未能阐述大陆构造。矿物变形的实验室研究结果、岩石流变学性质随深度改变和地震测深剖面资料都提示大陆岩石圈具有三明治式的强度包络面。任纪舜、张国伟和钟大赉分别把岩石圈不同深度层次的三维交切构造称为立交桥式构造或多向层架构造。它们的出现提示岩石圈发生了构造解耦,新的变形体制在拆离面以上发展起来。前苏联地质学家把它称为岩石圈的构造成层作用。本文列举了喜马拉雅东、西构造结和秦岭造山带可能出露于地表的三维交切构造实例,呼吁重视这类代表大陆岩石圈不同深度层次的构造堆叠体,并把它作为揭示岩石圈构造变形的最佳切入点。Diffusive deformation of the interior of the continental lithosphere indicates that the continental tectonics is different from plate tectonics. Laboratory measurements of mineral deformation, change in rheological behavior of rocks with depth and seismic sounding data all show jelly sandwich-like strength envelopes of the continental lithosphere. Ren Ji-shun, Zhang Guo-wei and Zhong Da-lai call these 3-D crossing structures at different levels of the lithosphere as the overpass architecture or multi-oriented layered structure separately. Its occurrence implies the tectonic decoupling in the lithosphere, and the new tectonic regime evolving on the detachment surface. Geologists of the former Soviet Union describe it as tectonic layering of the lithosphere. In the paper the authors cite some examples of overpass architectures possibly exposed in eastern and western syntaxes of the Himalayan orogen and the southern Qinling orogen and appear for geologists to pay attention to it and take it as a best penetrating point to approach the deformation of the continental lithosphere.

关 键 词：三维交切构造 深部地质 构造解耦 

分 类 号：P542.4[天文地球—构造地质学]