关于湖北省及邻区几个地质构造问题讨论  

DISCUSSION ON SOME PROBLEMS OF GEOLOGICAL STRUCTURES IN HUBEI PROVINCE AND ITS ADJACENT AREAS

作　　者：江世俊 李美美 

机构地区：[1]湖北省区域地质矿产调查所

出　　处：《湖北地质》1992年第1期23-37,共15页

摘　　要：本文根据各类地质资料的综合分析,将湖北省及邻区地壳构造演化划分为四个阶段,概述各阶段的基本特征。认为扬子陆块与相邻陆块之间不存在古生代大洋盆地,它们有可能属同一大陆板块的组成部分;秦岭地槽或造山带具陆内性质,南秦岭—淮阳—张八岭—胶南地区为秦岭褶皱系内的印支褶皱带,区内高压变质带为印支期陆内俯冲产物;扬子地台边缘区逆掩-推覆构造发育,龙门山、大巴山—大洪山以及张八岭—胶南地块南缘具有含油气的可能性。Based on the comprehensive analysis materials of the sedimentation, biota types,magmatism, metamorphism, deformation, tectonic movements, geophysics, geochemistry, isotopic ages, etc., the writers briefly discuss some problems on geological structures of Hubei Province and its adjacent areas in this paper. The basical conclusions are of impor-tant significance for accurately recognizing the crustal structure evolution, relationship be-tween the Yangzi(formerly Yangtze) land block(continent segment) and its adjacent land blocks, the southern Qinling—Huaiyang fold belt, the formation age and mechanism of its high-pressure metamorphic belt, its uplift in Mesozoic Era, deformation and oil-and gas-bearing probability of the border area of the Yangzi platform, etc. The above-mentioned conclusions are mainly as follows: (1) During the geological history time, there were both the difference and relation in evolution among the north China, Qinling and the Yangzi areas; the Qinling geosyncline and its orogenic belt were inland nature; during Paleozoic Era there probably existed a widespread tectonic region of the united continental plate in central China; the north Chi-na land block and the Yangzi land block, etc. were the component parts of this continental plate. (2) Southern Qinling—Huaiyang—Zhangbaling—Jiaonan fold belt and its high-pressure metamorphic belt were formed at the Indosinian stage; the main mechanism forming the fold belt and high-pressure metamorphic belt is the inland subduction(over-thrusting). During the geological history time, the Wudang-Huaiyang district was main-ly a sedimentary area but not an old land area; the present structural look was caused by the uplift and erosion from Mesozoic Era to Cenozoic Era. (3) In the border area of the Yangzi platform, the thrust-nappe structures developed during the Mesozoic Era. It is indicated that in the front lands of the eastern border in longmenshan Mt. and of the southern border in Wudang—Huaiyang—Zhangbaling—Jiaonan land block, the thrus

关 键 词：湖北省及邻区 地壳构造演化 陆内俯冲 逆掩-推覆构造 含油气性 

分 类 号：TD1[矿业工程—矿山地质测量]