巴丹吉林沙漠湖泊钙华与根状结核的发现对研究湖泊水补给的意义  

MEANING OF THE DISCOVERY OF LACUSTRINE TUFA AND ROOT-SHAPED NODULE IN BADAIN JARAN DESERT FOR THE STUDY ON LAKE RECHARGE

作　　者：陈建生[1] 赵霞[1] 汪集旸[2] 顾慰祖[1] 盛雪芬[1] 苏治国[1] 

机构地区：[1]河海大学,江苏南京210098 [2]中国科学院地质与地球物理研究所,北京100101

出　　处：《中国岩溶》2004年第4期277-282,共6页Carsologica Sinica

基　　金：国际原子能机构TC项目(CPR/08/015);河海大学院士基金项目

摘　　要：巴丹吉林沙漠湖泊中的钙华和根状结核的存在证实这些沙丘和湖泊形成的时间约3万年,而且基本上没有发生大的改变。同位素和水化学研究结果证实湖泊水与祁连山深大断裂中的地下水有关,湖泊群正好位于阿尔金断裂东端,祁连山断裂与阿尔金断裂在玉门一带相交,祁连山断裂的地下水汇入阿尔金断裂后最终补到巴丹吉林沙漠的湖泊群中;而钙华与根状结核是地下水通过碳酸盐岩地层后形成的。The existence of lacustrine tufa and root-shaped nodule in Badain Jaran Desert proves that the sand dunes and lakes were formed 30 ka ago, and have remained basically unchanged. Results from isotopes and water chemistry studies prove that the water in the lakes has something to do with the groundwater in the deep fault of Qilian Mountain. The lake group is just situated at the east end of the Altun fault. The deep fault of Qilian Mountain joins with the Altun fault in Yumen. The groundwater in the deep fault of Qilian Mountain converges into the Altun fault and at last to the Badain Jaran Desert. The tufa and root-shaped nodule should be formed by the groundwater that running through carbonate rocks.

关 键 词：钙华 阿尔金断裂 巴丹吉林沙漠 祁连山 补给 沙丘 地下水 湖泊水 湖泊群 水化学 

分 类 号：P314.1[天文地球—固体地球物理学] P941.73[天文地球—地球物理学]