中国东南地洼区中生代陆壳重熔的构造过程和地质效应  

DYNAMIC PROCESS AND GEOLOGICAL EFFECT OF THE MESOZOIC CRUSTAL REMELTING IN THE SOUTHEAST CHINA DIWA REGION

作　　者：陈国能[1] 

机构地区：[1]中山大学地质系,广州510275

出　　处：《大地构造与成矿学》1991年第1期31-40,共10页Geotectonica et Metallogenia

摘　　要：本文是在作者提出的原地重熔模式的基础上,进一步讨论东南地洼区中生代陆壳重熔的大地构造过程以及这一过程所产生的部份区域地质现象。研究表明,本区地洼活动的构造动力和重熔热主要来自太平洋方向,与贝尼奥夫带的作用有关,据此,作者建立了陆壳重熔的动力学模式,并提出了重熔层和重熔界面的概念,系统解释了本区与中生代花岗岩形成有关的部份重大地质现象和地质事件的起因。诸如花岗岩与构造运动时空一致性的原因、花岗岩带平行大陆边缘分布和花岗岩穹窿产出的原因、内生成矿作用的区域分带以及闽东南变质带形成的原因等。On the hypothesis of REMELTING IN SITU put forward by the author,this paper discusses both the dynamic process of crustal remelting and the geological effects brought about by the process. The research result on tectonic movements indicates that the remelting heat and tectonic force in the Mesozoic in this region were derived from the Pacific and related to the subduction of the oceanic crust. Based on the result,the author establishes a dynamic model to explain the origin of the Mesozoic remelted granitoids and some important gological phenomena related to crustal remelting,such as the relation between the tectonic movements and granitoids,the distribution pattern of the Mesozoic granitiods,the regional zonation of ore deposis,and the mechanism of some metamorphic zones,etc.

关 键 词：地洼区 陆壳 重熔 构造 地质效应 

分 类 号：P544.4[天文地球—构造地质学]