广州—罗浮山断裂构造带的基本特征及其形成演化的研究

The Study of Basic Characteristics of Fault-Tectonic Belts of Guangzhou-Luofushan and Its Formation and Evolution

广州——罗浮山断裂构造带是横亘广州地区中部规模最大的东西向断裂带.发育历史悠久,经历过多期、多阶段的活动,近南北向的拉张与挤压(或压剪)反复交替进行,形成了一系列不同力学性质的构造岩互相迭置、复合和构造岩的明显分带性.由于断裂的反复作用,控制着本区古生代地层的分布,中、新生代红色盆地的沉积,燕山期岩浆的侵入与喷发,现代地貌景观的形成,并影响着珠江三角洲部分拗陷的沉降和广州地区地震的发生.断裂活动强度的发展趋势,在中、新生代以来,由强到弱,挽近时期活动强度趋低.

The fault-tectonic belts of Guangzhou-Luofushan are the largest E-W trend fau-lt belts in the central part of Guangzhou area.It has a long developing history,and underwent polyepisode and polystage activites.The repeated tension andcompression(or compressional shear)of nearly N-S direction formed a series oftectonic rocks with different mechanical features and apparent zonation of thetectonic rocks which are superimposed and composed each other.The distributi-on of the Paleozoic strata,the Meosozoic and Cenozoic red beds,as well as theYenshanian igneous rocks and modern morphologic landscape are resulted fromthe repeated faultings which also influenced the subsidence of some portions ofpearl River Delta and the occurrence of earthquake of Guangzhou area.The int-ensity of faulting activity changed from strong to weak since Mesozoic to recenttime,and the intensity progressively decreased.