新疆可可托海--四川简阳地学断面岩石圈与软流圈结构  

Lithospheric and asthenospheric structures of the Koktokay of Xinjiang to Jianyang of Sichuan geoscience transect

作　　者：蔡学林[1] 曹家敏[2] 朱介寿[2] 

机构地区：[1]成都理工大学地球科学学院,四川成都610059 [2]成都理工大学信息工程学院,四川成都610059

出　　处：《中国地质》2008年第3期375-391,共17页Geology in China

基　　金：国家自然科学基金重点项目(49734150,40234047);面上基金(40474032);国土资源部专项计划项目(20001010206)

摘　　要：运用现代构造解析理论和方法,对新疆可可托海—四川简阳人工地震测深剖面与天然地震面波层析成像进行构造解析基础上,综合地质学、深源岩石包体构造岩石学和地球化学以及其他地球物理学标志等多学科综合研究显示,高速块体或幔块构造的几何结构型式是控制该区岩石圈构造格局和岩石圈表层构造变形基本条件之一。本文建立起该地学断面地壳及岩石圈与软流圈速度结构模型和物质组成结构模型,划分出岩石圈3种几何结构模式:克拉通陆根状结构、造山带楔状结构和高原陆根状结构,以及岩石圈二类构造演化类型:克拉通型岩石圈和增厚型岩石圈。在系统论述断面地壳及岩石圈结构构造类型特征基础上,探讨了该断面软流圈结构特征,岩石圈与软流圈相互作用及其地幔动力学模式。By using the theory and method of modem structural sounding profiling and natural seismic surface wave tomographic analysis, the paper analyses the explosion seismic imaging in the Koktokay of Xinjiang to Jianyang of Sichuan geoscience transect and integrates the results of research on geology, geochemistry, structural petrology of deep-seated xenoliths and geophysical signs. These studies indicate that the geometric structure pattern of high-speed blocks or mande block tectonics is one of the basic conditions for controlling the lithospheric tectonic pattern and tectonic deformation of the lithospheric surface. The crustal, lithospheric and asthenospheric velocity structure models and material composition models are constructed in this geoscience transect. Based on a systematic study of the high-speed blocks in the lithosphere, three geometric structures of the lithosphere are distinguished： craton-root-shaped structure, orogen-wedge-shaped structure and plateau-root-shaped structure, and two tectonic evolution types of the lithospheres are recognized： lithosphere. Based on the aforesaid systematic description, the paper asthenosphere, interaction between the lithosphere and asthenosphere cratonic lithosphere and thickened discusses the structural types of the and mande dynamic model of this geoscience transect.

关 键 词：岩石圈 软流圈 地震测深 地震层析成像 构造解析 幔块构造 新疆可可托海 四川简阳 

分 类 号：P313[天文地球—固体地球物理学]