桐柏山-大别山的地体构造特征和构造演化  

THE TECTONIC FEATURES AND EVOLUTION OF THE TERRANES IN TONGBAI-DABIE MOUNTAINS

作　　者：马宝林[1] 

机构地区：[1]国家地震局地质研究所,北京100029

出　　处：《地震地质》1991年第1期33-42,T001,共11页Seismology and Geology

基　　金：国家自然科学基金

摘　　要：本文讨论了桐柏山-大别山的地质构造特征。对该区三个地体进行了研究,指出:南部随州-广济高压浅变质地体具有俯冲杂岩性质;北部北淮阳高压浅变质地体中、西段具有俯冲杂岩性质,东段具有构造混杂岩特征;中部桐柏-大别山地体早期是洋盆中的大陆地壳残块,后期演化成岛弧。在加里东或海西-印支时期三地体先后碰撞造山。随州-广济地体和北淮阳地体分别向北、向南逆掩或推覆到桐柏-大别地体之上。This paper deals with the tectonic features of three terranes, namely Suizhou-Guangji, northern Huaiyang, and Tongbai-Dabie terranes. The first consists of subducted melange, which underwent high P-low T metamorphism. The second terrane consists of ophiolitic melange in its central and Western parts and tectonic melange in its eastern part which underwent high P-Low T (11℃/km) metamorphism. The third terrane is continental crust block in a paleao-ocean, with an evolutation into a volcanic arc. During the Caledonian and Hercynian movements these three terranes were involved in the mountain-building events. Although they were deeply eroded. it is recognized that the Suizhou-Guangji and northern Huaiyang terranes have overthrusted the Tongbai-Dabie terrane northward and southward respectively.

关 键 词：桐柏山 大别山 地体 构造 演化 

分 类 号：P547[天文地球—构造地质学]