华北地区奥陶系灰岩岩溶研究的几点思考

Several Thinkings on Ordovician Limestone Karst Study in Area of North China

讨论了华北地区奥陶系马家沟灰岩（O2）岩溶研究中的几个问题，包括沉积期岩溶、暴露期（加里东期）岩溶、埋藏期岩溶、现代岩溶及本区特殊的岩溶现象“陷落柱”等。指出了沉积岩溶、暴露岩溶洞穴不能保存或保存甚少，但对后期的岩溶发育具有重要控制作用；埋藏岩溶可分为完全埋藏和局部埋藏两个阶段，其中后者是现今奥灰岩溶面貌的定形期，陷落柱是该期岩溶的典型标志。最后提出了今后奥灰岩溶研究的思路。

The several problems of concerning karst study of Ordovician limestone in area of North China are discussed. It includes depositional karst, emergence karst (Caledonian Orogeny), buried karst, modern karst and karstic collape pole developed especially in this area etc. It is found that the caves of depositional karst and energence karst cannot be existed or be less exised. But that is of important to control the development of lated karst. Buried karst can be divided into two stages of complete buried and local buried, the lated one is determinant on Ordovician limestone karst landform in the present, karstic collapse pole is representative character of karst development in this stage.Finally, the study method and view of Ordovican limestone karst is put forward.