广西岩溶洞穴沉积物与地震记录初探

Preliminary Study on Earthquake Records and Cave and Speleothems of Karst,Guangxi

广西是西南地区的一个岩溶大省,其岩溶面积占土地面积的42%。广西岩溶洞穴十分发育,至少有6万个洞穴。洞穴景观资源丰富,为广西的旅游创造了大量的财富。岩溶洞穴沉积物不仅具有旅游开发价值,而且蕴含了丰富的古气候环境信息,同时,也是地震信息的存储器,是研究地震遗迹的良好材料。地震活动不仅导致岩溶洞穴及洞穴沉积物发生破裂、坍塌等地质灾害或现象,同时,地震也能引起岩溶表层带下渗水的水路发生改道或扩大,促使洞穴下渗水的滴水补给量增大,激发了石笋的生长。因此,本文根据岩溶洞穴沉积物记录的新、老地震遗迹,对残存的地震信息进行初步探索,可望能为广西西部地区的新构造活动研究和地震活动历史重建起到抛砖引玉的作用,提供一个新的研究思路。

Guangxi is a large province of karst in southwestern China.The karst areas are up to 42 percent of the total areas of Guangxi.Karst caves develop very well with at least 60 000 caves.Landscape resources in caves are very rich,which are a mass of wealth for traveling in Guangxi.The sediments in the cave are not only the valuable for tourism development,but also contains rich information of pale climate,pale environment and the earthquake.Thus,it is a good material to study earthquakes in history.The earthquake activity not only lead to the geologic hazard or phenomenon of fracture and collapse of caves and speleothem,but also lead to change or enlarge of the waterway of percolation water in epikarst zone.This can impels supplementation of cave dripping water to increase and excite the growth of stalagmites or deposit of speleothem.This paper will recover the earthquake information according to the new and old earthquake historical remains of cave and speleothem.We hope that our studies can help people to study new active fractures or faults and reconstructing the earthquake history,and can provide a new perspective to the future earthquake monitoring and forecasting.