苏州常州地区岩溶发育程度及控制因素研究

Study on karst development degree and controlling factors in Changzhou area of Suzhou

苏州常州地区碳酸盐岩地层分布广泛,岩溶层组类型多,受地形地貌和水系变迁等多种因素控制,岩溶发育特征十分复杂。结合野外调查成果,结合岩石成分与结构、地质构造、水动力条件和人类活动等控制因素,对苏州常州地区岩溶发育分布特征及发育程度进行研究并分区。结果可知:苏州常州地区的碳酸盐岩地层自震旦系至三叠系皆有发育,但被构造、非可溶岩等分割成零散的块段,具有"发育齐全,分布零散"的分布特征。根据碳酸盐岩分布及岩溶发育特征,可将苏州常州地区的碳酸盐岩分为太湖西山(隐伏—裸露区)、溧阳南部山区(裸露区)、溧阳上黄-别桥(隐伏—裸露区)、茅山(隐伏—裸露区)、常州孟河(隐伏—裸露区)和苏州、常州平原区(隐伏区)6个区;而岩溶地区的岩溶发育程度分为发育强烈(大于45%)、中等(30%~45%)、较差(小于30%)三个区。

Carbonate rock strata are widely distributed in Changzhou area of Suzhou,many types of karst strata,which are controlled by many factors such as topography,landform and drainage changes,and the karst development characteristics are very complex.Based on the results of field investigation,based on the key factors such as rock composition,structural geology,hydrodynamic conditions and human activities,the development and distribution characteristics and development degree of karst in Changzhou area of Suzhou were studied and divided.Result:Suzhou,Changzhou region of carbonate formation from sinian system to Triassic system is development,but is constructed of can be divided into discrete segment such as lava,complete with development,the distribution features of the scattered distribution According to the distribution of carbonate rocks and the characteristics of karst development in Suzhou,Changzhou region of carbonate rocks can be divided into Taihu Ximount(concealed bare area)、Liyang Southern Mountain Area(exposed area),Liyang Shanghuang-Bieqiao(hidden exposed area),Mao mount(hidden exposed area),Changzhou Meng river(hidden exposed area) and Suzhou Changzhou Plain Area(hidden area)6 areas;The karst development degree in karst area is divided into three areas:strong(more than 45%) medium(30%~45%) and poor(less than 30%).