中国华南活化区历史-动力学的初步研究

强调了中国大陆活化区动力学研究的理论创新意义和指导找矿、预测的经济价值。指出采用历史-动力学综合分析和注重四维时、空并重研究,对中国大陆活化区动力学历史背景和阶段性发展、演变研究的必要性。文中以中国华南中、新生代活化区为例,从大陆活化构造体制岩石圈的地质-地球物理场背景和动力学边界特点,及其活化解体前“活化前奏”的地质表现,中、新生代大陆活化构造演变的地质、构造表现和运动学-动力学特点及热-构造作用过程的地质-地球物理场特征等方面,指出大陆活化是热-构造对克拉通岩石圈深、浅部进行改造、再造的动力作用过程。各种地质记录和信息均显示,在地幔热能大规模聚集驱动下,热异常软流圈主动上涌的热侵蚀、转换,具有垂向为主兼有二维平向的三维运动学-动力学和时间维的阶段性演变,是大陆活化区动力学及其构造应力场的基本特性。

PRELIMINARY STUDIES OF HISTORY- DYNAMICS OF THE SOUTH CHINA MOBILIZED REGION

This paper proposes theoretical sig nificance of study on the mobilized r egion of China mainland and economic value of predi ction or exploration of mineral deposits,and points out it is necessary to apply the method of inte grative analysis of history-dynami cs and time and space in order to study the historic setting and dev elopment-evolution stage of the mob ilized region of China con-tinent.Taking South China Mesozoic-Cenozoic mobilized area as an examp le,this paper points out continental mobilization is of a dyn amic process of craton lithosphere r eformed by heat-tectonic function on the basis of lithospheric geological-geophysical setting a nd dynamic borderline nature,and‘mobilizing prelude’geological phenomen when it is activ ated and disintegrated,and geological or structural phenomenon and kinema tic-dynamic feature as well as geolo gical or /and geophysical field nature of heat-tectonic proce ss of Mesozoic-Cenozoic mobilizing structural evolution.All of geological records or information s hows that drived by heat energy storing up in mantle,the thermal anomalous asthenosphere surges upw ards with corroding and transformin g heat,and has kinemat-ics-dynamics of dominant vertical /movement and second horizontal movement,and time stage evolution,which is the basic characteristics of the dynamics and structural stress field of continental mobilized region.