内蒙古察干淖尔盐湖298ka时段的湖面波动  

Lake level fluctuation in Qehan Salt Lake during 29-8 ka,Inner Mongolia

作　　者：斯琴毕力格 春喜[1,3] 宋洁[1,2] 白雪梅[1,2] 

机构地区：[1]内蒙古师范大学蒙古高原环境与全球变化自治区重点实验室,呼和浩特010022 [2]内蒙古师范大学地理科学学院,呼和浩特010022 [3]内蒙古师范大学湿地环境与修复自治区工程实验室,呼和浩特010022

出　　处：《湖泊科学》2016年第4期909-916,共8页Journal of Lake Sciences

基　　金：国家重点基础研究发展计划"973"项目(2012CB426508);国家自然科学基金项目(41261008);内蒙古草原英才项目(CYYC2013103)联合资助

摘　　要：以内蒙古锡林郭勒盟苏尼特右旗的察干淖尔盐湖为研究对象,利用OSL(Optically Stimulated Luminescence)测年技术和DEM(Digital Elevation Model)数字高程模型,重建湖面波动历史,探讨湖泊形成与环境变化过程.通过对察干淖尔盐湖周边大量的野外考察,发现湖泊周围存在海拔高程为1020、978和973 m的三级古湖岸阶地,其OSL测年结果分别为29.2±1.3、18.4±0.8及8.2 8.0 ka.通过湖岸阶地高程恢复的上述3个时期的古湖面积分别为3600、500和400 km^2.与现今的干旱盐湖景观迥然不同.Choosing Qehan Salt Lake in Inner Mongolia and using （Optically Stimulated Luminescence, OSL） dating techniques and digital elevation model （DEM）, this research reconstructs the history of lake level fluctuation, and discusses the process of lake form and environment evolution. According to the field work in the area around Qehan Salt Lake and samples of lake sediment, the elevations of 3-level paleolake terraces are 1020 m, 978 m and 973 m. Using OSL dating techniques to detect the age of lake sediment and establish the time series of lake fluctuation, the ages of 3-level paleolake terraces are 29.2± 1.3 ka, 18.4±0.8 ka and 8.2 - 8.0 ka. ArcGIS software was used to track 3-level terraces in the topographic map of 1：50000 and construct DEM, the scope and level of paleolake in every period. The spatial distribution pattern of the lake evolution has been reconstructed. The lake area was 3600 km2, 500 km2 and 400 km2, respectively, which was very different from today＇s arid salt lake landscape.

关 键 词：季风边缘区 湖泊演化 OSL测年技术 DEM模型 察干淖尔盐湖 

分 类 号：P343.3[天文地球—水文科学]