中国大陆地壳与上地幔精细结构探测十条第一剖面和其作用与科学意义  

Ten profiles of artificial-seismic sounding to fine structure of crust and upper mantle in Chinese mainland:The first profiles and its scientific implications

作　　者：滕吉文[1] 

机构地区：[1]中国科学院地质与地球物理研究所,北京100029

出　　处：《地球物理学进展》2008年第5期1341-1354,共14页Progress in Geophysics

基　　金：中国科学院知识创新工程重要方向(KZCX3-SW-148);部咨询项目(2007-2009);国家自然科学基金重点项目(4043009)联合资助

摘　　要：地球内部物理学和地球动力学在地球科学研究领域里占有重要地位.为了研究和探索我国大陆不同大地构造单元和板内特异块体与其界带的深部介质属性、结构和深层物理—力学过程,已在我国最先构思、设计、布署并实施了十条人工源深部地震探测剖面.沿这十条第一剖面进行了高精度的地震反射、宽角反射和折射波场观测,进行了数据采集,获得了深部高分辨率的信息.通过数据处理和反演求得了各剖面辖区的沉积建造、结晶基底、地壳与上地幔的差异和层、块精细速度结构,发现、研究和提出了一系列的重要科学问题并取得了一系列新认识.为研究成山、成盆、成岩、成矿、成灾,圈层耦合和深化认识地球本体与动力学响应打下了坚实的基础,明确指出了其深入研究的内涵和发展导向.The physics of earth interiors and geodynamics are of great importance in geosciences. To explore and study medium attributes, structure and deep physical and mechanical processes beneath varied tectonics, special intraplate blocks and their boundaries in the Chinese mainland, ten profiles of artificial-source seismic sounding have been planned, deployed and put into effect. Among them, along the first profiles field work has been carried out, including high-resolution seismic reflection and wide-angle reflection/refraction observations of wave fields. Through data acquisition, processing and inversion, information of layer block velocity structures at depth has been obtained, which reveals variations in sedimentary formation, crystalline basement and structure of crust and upper mantle along the profiles. From these exploration results, a series issues are raised for further research. They involve generations of ranges, basins, rocks, mineral deposits and disasters, as well as sphere-layer coupling and deep processes in the earth interiors. The results of these first profiles would be significant to understanding the earth itself and its dynamic responses and enlightening the direction of further exploration and deep research.

关 键 词：第一剖面 地壳与上地幔结构 深层过程 动力学响应 基础研究 

分 类 号：P541[天文地球—构造地质学] P315[天文地球—地质学]