湖北随州逆冲推覆构造的基本特征及其化学地球动力学研究  

Thrust Nappe Structure and Its Chemical Geodynamics Study of Suizhou,Hubei Province

作　　者：江为民 简玉兵 曾小华 刘忠明 

机构地区：[1]湖北省地质调查院,湖北武汉430034 [2]湖北省地质科学研究所,湖北武汉430034

出　　处：《资源环境与工程》2013年第1期1-7,共7页Resources Environment & Engineering

摘　　要：随州逆冲推覆构造形成于印支—燕山期,运动方向由SSW向NNE。推覆构造中发育不同类型的褶皱和不同程度的褶劈。推覆构造具有明显的分带特点,在逆冲方向上可分为后缘带、根带、中带、锋带、外缘带。在垂向上可分为外来系统、逆冲推覆剪切带和原地系统三部分。逆冲推覆剪切作用引起了元素的动力分异,结合逆冲推覆构造元素水平分带、垂直分带、褶劈带的形成与元素分配组合特征作了相关探讨,Au、Ag在中带-2及中带-3中趋于浓集。在外来系统中,距离主逆掩推覆剪切面0.2～1.4 km范围内,Au浓集程度非常明显,是成矿的有利构造部位。The nappe structure of Suizhou were formed in Indosinian period-Yanshan stage, direction of motion from the SSW to NNE. In the thrust nappe structure development of different types of folds and different degree of fold cleavage. The nappe structure of Suizhou has obvious zoning characteristics, in the reverse direction can be divided into the trailing edge zone, the root zone, the frontal zone, the outer edge zone. In the vertical direction can be divided into external system, thrust nappe shear zone and autochthonous system. The power of differentiation of the elements is caused by thrust nappe shear effect. Combined with the discussion of horizontal zoning of thrust nappe structure element,vertical zoning, fold cleavage zone formation and element distribution characteristics, Au, Ag in -2 and -3 bands are concentrated. In the external system, from the main thrust nappe shear surface in the range of 0.2 - 1.4 km, Au concentration degree is very obvious, this structural positions is the favorable for mineralization.

关 键 词：逆冲推覆构造 控矿构造 化学地球动力学 湖北随州 

分 类 号：P542.2[天文地球—构造地质学] P541[天文地球—地质学]