Development and Use of Tourism Resources in Dahengshan of Mingguang City

Dahengshan is rich in natural, cultural and tourism resources. However, the existing conditions are not good. On the basis of existing conditions, this paper presents ideas of "development in the process of protection, promoting protection through development". The development of tourism resources in Dahengshan should properly treat the relationship between tourism reception ability and environmental carrying capacity, understand the relationship between tourism resource protection and development, restore destroyed tourism resources, make practical tourism plan, cultivate management personnel, improve service level, increase development investment, expand investment and financing channels, energetically develop tourism series products, increase propaganda, raise popularity, and strengthen regional tourism cooperation, finally build big Mingguang tourism circle. Landscape design should focus on ecology, in the hope of ranking in the tourism system of Mingguang City.

藏北大横山—弯岛湖一带的中—晚三叠世地层——对若拉岗日构造带地质演化的地层学制约

在藏北大横山地区二岔沟一带的硅质岩、硅质泥岩中首次发现了拉丁晚期—卡尼早期的放射虫动物群,建立了二岔沟组。二岔沟组在区域上出露比较广泛,并往往与蛇绿岩相伴产出,系蛇绿岩的上覆沉积岩系,根据其中的放射虫化石的时代及获得的蛇绿岩Sm-Nd全岩等时线年龄值232Ma±11Ma,推断蛇绿岩形成于中三叠世晚期—晚三叠世早期。若拉岗日群的解体和二岔沟组、弯岛湖蛇绿岩的基本特征,表明大横山地区中三叠世晚期—晚三叠世早期为多岛洋盆扩张的鼎盛时期,晚三叠世—早侏罗世早期的消减闭合、碰撞造山运动形成了大横山构造蛇绿混杂岩带。