| 末次水消期以来气候期划分的准确定位与定年 |
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| 关键词:stalagmite records division of climate peiod 230Th dating Dongge cave in Libo Guizhou |
| 基金项目:国土资源地质调查项目“西南岩溶地区地下水与环境地质”（批准号：1212010340104）、国家自然科学基基项目（批准号：40231008）、（批准号：90202016）及科技部面上项目（批准号：2003DEB6J069）资助。 |
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| Accurate Locating and Dating for Division of Climate Periods since the Last Deglaciation Stage |
| The high resolution 230Th dating and C O isotope analysis performed again by the authors for D4 stalagmite samples from Dongge cave in Libo, Guizhou Province,show an average resolution of 18 a for the part produced since 16 ka. The study indicates that the oxygen isotope reords, besides reflecting the variation of the monsoon intensity, can better reveal the abrupt change of climate during H1, BA and YD as well as 9100 a ,8200 a and 4600 a in Holocene. The carbon isotope records and sedimentation rates are most likely to reflect the humidity of climate. In conclusion, the correct division of climate periods and accurate location and dating of the mutation event obtained from stalagmite records provide a basic scale of reliable time series for the studies of other glodal change records. |
| QIN JIAMING,YUAN Daoxian,LIN Yushi,ZHANG Meiling,ZHANG Cheng,WANG Hua,FENG Yumei,TU linling,YANG Yan,CHENG Hai,R.Lawrence.Edwards,RAN Jingcheng,CHEN Huiming.2005.Accurate Locating and Dating for Division of Climate Periods since the Last Deglaciation Stage[J].Acta Geoscientica Sinica,26(z1):209-212. |
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