摘要
通过中国大陆及邻区地震测深剖面的系统构造解析,建立起中国大陆岩石圈地壳厚度与速度结构模型。本文根据地壳厚度与速度结构模型、地壳变形结构样式、地壳地质结构与构造演化、地壳运动学与动力学等四方面标志,将中国大陆岩石圈地壳划分为3类6种地壳结构-动力学型式:克拉通型褶推式结构-挤压动力学型式、克拉通型地垒结构-拉伸动力学型式、增厚型高原扇形结构-碰撞楔入动力学型式、增厚型造山带楔状结构-俯冲楔入动力学型式、减薄型盆岭结构-块体伸展动力学型式和减薄型铲状结构-整体伸展动力学型式。笔者探讨了克拉通型地壳、增厚型地壳和减薄型地壳的基本特征、相互关系及其地质意义。
A crustal thickness and velocity structure model of continental China has been constructed based on a systematic structural analysis of the seismic sounding profile in continental China and its adjacent regions. According to this model, structural styles of crustal deformation, crustal geological structure and tectonic evolution and crustal kinematics and dynamics, the lithospheric crust beneath continental China is divided into six crust structure-dynamic types: (1) cratonic folded-thrust style structure-compressional dynamic type (Tarim type); (2) cratonic horst structure-extensional dynamic type (Ordos type); (3) thickened plateau fan structure-collisional wedging dynamic type (Tibetan Plateau type); (4) thickened orogenic wedge structure-subductional wedging dynamic type (Tianshan type); (5) thinned basin-range structure-block extensional dynamic type (North China type); and (6) thinned listric structure-wholesalely extensional dynamic type (South China type). This paper discusses the basic characteristics of cratonic crustal, thickened crust and thinned crust and their relations and geological significance.
出处
《中国地质》
CAS
CSCD
2007年第4期543-557,共15页
Geology in China
基金
国家自然科学基金重点项目(49734150
40234047)
国土资源部重点科技专项(20001010206)联合资助。
关键词
地壳
岩石圈
地震测深
构造解析
三维结构
动力学型式
中国大陆
crust
lithosphere
seismic sounding
tectonic analysis
3D structure
dynamic type
continental China