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引用本文:任国玉.内蒙古湖相沉积14C年代测定中“硬水”影响的发现.湖泊科学,1998,10(3):80-82. DOI:10.18307/1998.0314
Ren Guoyu.A Finding of the Influence of “Hard Water” on Radio Carbon Dating for Lake Sediments in Inner Mongolia,China. J. Lake Sci.1998,10(3):80-82. DOI:10.18307/1998.0314
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内蒙古湖相沉积14C年代测定中“硬水”影响的发现
任国玉
国家气候中心, 北京 100081
摘要:
对内蒙古科尔沁沙地巴克窑泡子湖相沉积物分别做了210Pb和14C测年。比较这两种方法测定结果发现,14C年龄比210Pb估计年龄偏老约2000年,内蒙古其它湖泊的沉积物14C测年资料一般也都存在年龄偏老问题。作者认为,这一现象主要是由干燥和半干燥地区湖泊“硬水”影响引起的。
关键词:  干燥区  14C年龄  “影响硬水”
DOI:10.18307/1998.0314
分类号:
基金项目:国家攀登计划资助(27-1)资助项目
A Finding of the Influence of “Hard Water” on Radio Carbon Dating for Lake Sediments in Inner Mongolia,China
Ren Guoyu
National Climate Center, Beijing 100801
Abstract:
Bakeyao Lake is located in the Horqin Sand Land, in the eastern part of Inner Mongolia. In estimating the dates of the lake sediment, the author found that the radiocarbon dates were nearly 2000 years older than thoes derived from210Pb measurements. In order to find out the reason. the author made sonce investigations on some other carbon dating results for lake sediments in the arid and semi-arid areas of China,and found that most of them seemed to be 1000-2000 years older than expected. This makes the author conclude that the usually older dates derived from the radio carbon dating may have been induced by the “hard water” effect.Caution therefore should be paid to the carbon dating problem in the future studies in North and West China.
Key words:  14C dating  “Hard Water” effect  Inner Mongolia  arid area
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