亚洲大陆中部壳体东、西部历史-动力学的构造分异及其意义  

HISTORISTIC-DYNAMIC TECTONIC DIFFERENTIATION OF E-W OF CENTRAL ASIA CONTINENTAL CRUSTOBODY AND ITS SIGNIFICANCE

作　　者：陈国达[1] 彭省临[1] 戴塔根[1] 

机构地区：[1]中南大学

出　　处：《大地构造与成矿学》2005年第1期7-16,共10页Geotectonica et Metallogenia

基　　金：湖南省院士基金和高校博士点专项基金资助.

摘　　要：从历史-因果论的角度,对亚洲大陆中部的演化-运动史,及其大地构造体制发展阶段的地质构造和成矿作用,进行了系统的阐述,重点阐述了东、西部构造差异的历史-动力学表现及其原因。研究表明:这种差异并非两个不同大陆壳体演化-运动上的差异造成,而是在同一大陆壳体形成与平向增生进程中东早西晚的历史背景条件下,由于东部与西部中生代、新生代陆内深部地幔热能聚集增强的上升流与热能发散衰减的下降流,共同组成的垂向热流环发生反转变化造成的结果,并得出了主导亚洲大陆中部东、西构造分异的主动性因素是陆内地幔热能聚散动力学机制的结论。同时指出,中新生代出现在亚洲大陆中部的东、西构造分异,是同一大陆壳体即东-中亚壳体自身历史-动力学构造分异的表现,它是亚洲大陆动力学中,与陆内克拉通活化及活化造山区的出现、青藏高原的隆升、东亚陆缘扩张带的形成并列的 4个重大事件之一,并在这些重大事件的动力学研究中占据关键性的核心地位。In view of historistic-causationist geotectonics, the evolution-movement history of the central Asia continent, and its geology, structure and metallogenesis in geotectonic development phases, are systematically expatiated in the article. Special discuss is paid to the historistic-dynamic behaviors and their causes, corresponding to the tectonic diversity of east and west areas. It is concluded that the tectonic diversity of east and west part was resulted from, in the course of the identical continental crustobody's formation and horizontal enlargement in which the east was earlier than the west, the reversion of heat flow loop which was composed of enhanced ascend flow coming from the congregating of mantle heat energy and damped descend flow coming from the exhaling heat energy in Mesozoic and Cenozoic, but not the result of the differences of two continental crustobodies’ evolution and movement. The conclusion that the go-aheadism factor dominated the diversity of east and west of the central Asia continent was the dynamic mechanism of congregating and exhaling mantle heat energy is reached. It is suggested that the tectonic diversity came forth in Mesozoic and Cenozoic is the behaviors of the identical continental crustobody itself, i.e. the east-central crustobody’s historistic-dynamic tectonic differentiation. Furthermore, this event could be juxtaposed with the other 3 momentous events of Asia continental dynamics, that is the craton’s activation of inner continent and coming forth of activating orogenic region, uplift of the Qinghai-Xizang (Tibet) Plateau, and formation of the East Asia marginal expansion zone, and it is the key to kinetics research for these events.

关 键 词：历史-动力学 壳体演化-运动 构造分异 地幔热能聚散 亚洲大陆中部 

分 类 号：P541[天文地球—构造地质学]