“地球动力学”的研究现状与展望——第32届国际地质大会研究成果综述

RESEARCH ON PRESENT STATUS AND VISTA OF GEODYNAMICS——AN OVERVIEW OF RESEARCH RESULTS IN THE 32nd INTERNATIONAL GEOLOGICAL CONGRESS

第32届国际地质大会通过按地域和构造作用过程等形式划分11个专题会场,展示了地球动力学的研究成果。其成果主要包括特提斯域构造演化及其不同阶段的块体裂解、拼合及后期改造的细节过程,地质历史中的超大陆分布和成因,俯冲—碰撞带深部构造和变质机制,安第斯山(Andes)缓倾角平坦式俯冲过程及其地壳变形和岩浆作用的响应,显微构造对动力作用过程的影响和控制,地壳和上地幔熔融、流变学和动力学意义,大洋岩石圈构造与演化,大陆地盾区构造和再活动,稳定大陆区地震,空间大地测量学和现代板块运动等方面。这些研究成果充分显示了地球动力学研究具有多学科、多手段(如古地磁、超深钻、地球物理、大地测量和GPS等)、多尺度(宏观、微观)和多时期、全面、综合、并逐步接近定时、定位和定量地探索和研究的特点,它从地球(主要为上地幔和地壳)的组成、结构构造入手,逐步认识地球(主要为地球岩石圈)的演化和动力学。

The research results about geodynamics were shown in 11 sessions partitioned by regions and tectonism in the 32nd International Geological Congress. Through completely overview, the research results include: the tectonic evolution of Tethyan domains and the detailed processes of their rift, close and modification at later stages, supercontinents and their origin in Earth's history, deep seated tectonics and metamorphism in subduction-collision belts, flat subduction in the Andes and its response of crustal deformation and magmatism, microstructural influence and control on dynamic process, melting and the rheology of the crust and upper mantle, and their significance for geodynamics, structure and evolution of oceanic lithosphere, tectonics and reactivity of shield area, stable continental region earthquakes, space geodesy and present plate motion etc. These research results fully represent that the study of geodynamics is characterized by multi-subject, multi-means (for example, paleomagnetism, superdeep borehole, geophysics, geodesy and GPS), multi-scale (macroscopic, microscopic) and multi-stage, complete, integrative, timing, positioning and quantitative exploration, and progressively probes into the evolution and dynamics of the earth (mainly lithosphere).