| 高精度ICP-MS 230Th测年新技术及其在贵州衙门洞Y1石笋测年研究中的应用 |
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| 引用本文： | 杨琰,袁道先,程海.高精度ICP-MS 230Th测年新技术及其在贵州衙门洞Y1石笋测年研究中的应用[J].中国岩溶,2006,25(2):89-94. |
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| 作者姓名： | 杨琰 袁道先 程海 |
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| 作者单位： | 1.中国地质大学(武汉)研究生院 2.国土资源部岩溶动力学重点实验室 3.Geology and Geophysics Department , Minnesota University |
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| 基金项目： | 中国科学院资助项目;国家自然科学基金 |
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| 摘 要： | 在系统介绍洞穴石笋高精度ICP-M S铀系年代学原理与方法的基础上,对贵州荔波县衙门洞Y1石笋进行了IC P-M S 230 Th测年研究。综合分析认为精确时标的建立对于利用石笋进行古气候重建具有重要的实际意义;采用ICP-M S 230 Th测年方法进行石笋样品定年准确可靠,并且比TIM S方法具有更高的效率,所需样品更微量。通过生长速率变化分析表明,石笋生长速率记录了过去冷暖突变事件,因此可以用它作为一个有意义的环境记录替代指标来研究古降水及古气候变化。
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| 关 键 词： | 洞穴 石笋 ICP-MS 铀系法 贵州衙门洞 |
| 文章编号： | 1001-4810(2006)02-0089-06 |
| 修稿时间： | 2006年3月10日 |
RESEARCH ON THE HIGH PRECISION ICP-MS URANIUM SERIES 230 Th CHRONOLOGY AND A CASE STUDY ON STALAGMITE Y1 IN YAMEN CAVE, LIBO COUNTY, GUIZHOU, CHINA |
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| YANG Yan,YUAN Dao-xian and CHENG Hai.RESEARCH ON THE HIGH PRECISION ICP-MS URANIUM SERIES 230 Th CHRONOLOGY AND A CASE STUDY ON STALAGMITE Y1 IN YAMEN CAVE, LIBO COUNTY, GUIZHOU, CHINA[J].Carsologica Sinica,2006,25(2):89-94. |
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| Authors: | YANG Yan YUAN Dao-xian and CHENG Hai |
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| Institution: | 1.School of Graduate, China University of Geosciences 2.Karst Dynamics Laboratory ,MLR 3.Geology and Geophysics Department , Minnesota University |
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| Abstract: | Based on the introduction to high precision ICP-MS uranium series chronology mechanism and method,the stalagmite Y1 from Yamen cave,Libo county,Guizhou province,China was dated with the method in the paper.From researching on ~(230) Th data of stalagmite Y1,the following conclusions can be made.The precise chronology established is of practical significance for the reconstruction of paleo-climate by stalagmite;ICP-MS ~(230) Th dating method is accurate and credible,which is more efficient than TIMS method;ICP-MS ~(230) Th dating method needs much less weight of calcite sample.By researching growth rate of stalagmites,it is proved that growth rate can record abrupt cold and warm events in the past global climatic changes.Therefore,growth rate of stalagmites could be regarded as a good environmental proxy for the study of changes in paleo-precipitation and paleo-climate. |
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| Keywords: | ICP-MS |
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