内蒙古石人沟南山晶洞正长花岗岩地貌特征

GEOMORPHOLOGY OF MIAROLITIC SYENGRANITE IN SHIRENGOU,INNER MONGOLIA

通过详尽的野外调查工作对其地貌形态进行描述和成因分析,表明石人沟南山晶洞正长花岗岩发育有石蛋、晶洞等较为奇特的地貌.其造景岩石为早白垩世A型晶洞正长花岗岩.岩体中发育的北北东—北东向、北西向断裂、裂隙及节理是控制山峰形态和规模的主要构造.风化剥蚀、流水侵蚀和重力崩塌是地貌形成的主要外动力作用,其成景岩石独特,所成多种地貌是不可多得的地质遗迹与旅游开发资源.

With study on the geomorphic forms and genesis of miarolitic syengranite in Shirengounanshan,Inner Mongolia,it is revealed that the unique geomorphic types include pebbly landform,drasy cavity,etc.,with the Early Cretaceous A-type miarolitic syengranite as the landscaped rock.The NNE-NE and NW-trending faults,fissures and joints basically control the shape and size of mountains.Weathering denudation,water erosion and gravitational collapse are the major external power that forms the miarolitic syengranite landforms.The unique landscaped rock and various geomorphic types make it the rare geological heritage and tourism resources.