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引用本文:于志同,刘兴起,王永,葛兆帅,潘存峰,杨波.13.8ka以来内蒙古吉兰泰盐湖的演化过程.湖泊科学,2012,24(4):629-636. DOI:10.18307/2012.0418
YU Zhitong,LIU Xingqi,WANG Yong,GE Zhaoshuai,PAN Cunfeng,YANG Bo.Evolution of Jilantai Salt Lake, Inner Mongolia in the last 13. 8 ka. J. Lake Sci.2012,24(4):629-636. DOI:10.18307/2012.0418
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13.8ka以来内蒙古吉兰泰盐湖的演化过程
于志同1,2, 刘兴起2, 王永3, 葛兆帅1, 潘存峰4, 杨波5
1.江苏师范大学城市与环境学院, 徐州 221116;2.中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室, 南京 210008;3.中国地质科学院地质研究所, 北京 100037;4.内蒙古中盐吉兰泰盐化集团公司, 阿拉善 750333;5.中国科学院青海盐湖研究所, 西宁 810008
摘要:
通过系统分析吉兰泰盐湖JLT-2010孔蒸发盐类矿物、碳酸盐矿物、碎屑岩矿物等,结合AMS14C测年获得的年代序列,研究该湖13.8 ka以来的演化过程.结果表明:吉兰泰盐湖13.8-11.7 cal ka BP期间水体较淡;11.7-10.2 cal ka BP期间湖泊开始萎缩、咸化,进入咸水湖阶段;10.2-5.5 cal ka BP期间湖泊进入硫酸盐沉积阶段,其中9.0-8.2 cal ka BP经历了一个明显的淡化过程;5.5 cal ka BP以来,湖泊成盐作用进一步加强,由前期的硫酸盐沉积转变为氯化物沉积,其中3.7-2.0 cal ka BP达到全面氯化物沉积阶段,2.0-1.7 cal ka BP又经历了一个短暂而明显的淡化过程;目前,该盐湖已进入干盐湖发展阶段.总体而言,吉兰泰盐湖蒸发盐类矿物主要是在全新世增温的背景条件下逐步萎缩形成的,由于区域性干旱气候的持续影响,吉兰泰盐湖逐步萎缩、咸化,进而析盐.
关键词:  吉兰泰盐湖  矿物组成  演化过程
DOI:10.18307/2012.0418
分类号:
基金项目:中国地质调查局地质调查项目(1212011087116)资助
Evolution of Jilantai Salt Lake, Inner Mongolia in the last 13. 8 ka
YU Zhitong1,2, LIU Xingqi2, WANG Yong3, GE Zhaoshuai1, PAN Cunfeng4, YANG Bo5
1.School of Urban and Environmental Sciences, Jiangsu Normal University, Xuzhou 221116, P. R. China;2.State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, P. R. China;3.Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, P. R. China;4.Jilantai Salt Group Co., Ltd., Lantai Salt Division, Inner Mongolia, Alxa 750333, P. R. China;5.Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, P. R. China
Abstract:
Evolution of Jilantai Salt Lake in the last 13.8 ka was reconstructed based on the analysis of evaporate minerals, carbonate minerals and detrital minerals from the core JLT-2010. The lake water was fresh or slightly salty between 13.8 and 11.7 cal ka BP. The lake began to shrink between 11.7 and 10.2 cal ka BP, and then it entered into the lagoon stage. Sulfate deposition occurred in Jilantai Salt Lake between 10.2 and 5.5 cal ka BP, meanwhile, from 9.0 to 8.2 cal ka BP there existed a significant desalination process. The lake reached full chloride deposition stage between 3.7 and 2.0 cal ka BP, and a short and obvious desalt period occurred between 2.0 and 1.7 cal ka BP. Overall, evaporate minerals appeared just at the beginning of the Holocene when temperature increased relative to the late glacial. As the regional arid climate continually affecting the area, Jilantai Salt Lake gradually shrank and salinized.
Key words:  Jilantai Salt Lake  mineral composition  evolution
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