| 成都平原4 ka以来地层磁化率特征及气候变化意义 |
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| 引用本文： | 罗丽萍,朱利东,杨文光,张擎,王成善,阚瑷珂,罗虹,江章华,朱章义.成都平原4 ka以来地层磁化率特征及气候变化意义[J].成都理工大学学报(自然科学版),2007,34(3):327-330. |
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| 作者姓名： | 罗丽萍 朱利东 杨文光 张擎 王成善 阚瑷珂 罗虹 江章华 朱章义 |
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| 作者单位： | 成都理工大学沉积地质研究院,成都,610059;同济大学海洋地质国家重点实验室,上海,200092;成都市文物考古研究所,成都610072;中国地质大学地球科学与资源学院,北京,100083 |
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| 摘 要： | 对成都金沙遗址IT6814探坑约4 m厚地层的5 cm间距磁化率分析,建立了成都平原4 ka以来的质量磁化率曲线和频率磁化率曲线.根据质量磁化率和频率磁化率特征结合粒度中值曲线对比,探讨了金沙遗址4 000 a来的气候环境变化,划分出成都平原的三个气候阶段:4 000～3 380 aBP,气候偏湿;3 380～1 700 aBP,气候条件相对湿热;1 700 aBP～20世纪90年代初,气候逐渐偏干冷.
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| 关 键 词： | 成都平原 金沙遗址 质量磁化率 频率磁化率 气候变化 |
| 文章编号： | 1671-9727（2007）03-0327-04 |
| 修稿时间： | 2006-10-06 |
Magnetic susceptibility characteristics and paleoclimate explanation of Chengdu plain since 4000 a |
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| LUO Li-ping,ZHU Li-dong,YANG Wen-guang,ZHANG Qing,WANG Cheng-shan,KAN Ai-ke,LUO Hong,JIANG Zhang-hua,ZHU Zhang-yi.Magnetic susceptibility characteristics and paleoclimate explanation of Chengdu plain since 4000 a[J].Journal of Chengdu University of Technology: Sci & Technol Ed,2007,34(3):327-330. |
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| Authors: | LUO Li-ping ZHU Li-dong YANG Wen-guang ZHANG Qing WANG Cheng-shan KAN Ai-ke LUO Hong JIANG Zhang-hua ZHU Zhang-yi |
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| Institution: | 1. College of Earth Sciences, Chengdu University of Technology, Chengdu 610059, China; 2. Laboratory of Marine Geology, Tongji University , Shanghai 200092, China; 3. The Institute of Archaeology of Chengdu City, Chengdu 610072, China; 4. School of the Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China |
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| Abstract: | As a paleoclimatic proxy index,magnetic susceptibility parameter widely used in studing climatic changes is applied in studing the sediment of Chengdu plain.In the research,83 pieces of samples were collected at the interval of 5 cm in Jinsha site IT6814.Based on the susceptibility measurement,the quality magnetic susceptibility curve and the frequency magnetic susceptibility curve have been established.The climatic conditions of Chengdu plain since 4000 a can be divided into three phrases according to the characteristics of susceptibility and median size of grain.By comparing the parameter characteristics,people can conclude that the high values of susceptibility are related to large size of grain at about 3.6 m and 2.2~2.5 m of the profile,while the high value of susceptibility is controlled by pottery shards at 1.4~1.8 m of the profile,and that the relatively lower value of that at the bottom of the profile is the result of being overwhelmed by water. |
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| Keywords: | Chengdu plain Jinsha site quality magnetic susceptibility frequency magnetic susceptibility climatic changes |
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