| 攀枝花地区昔格达组地层稀土元素地球化学特征及其古环境意义 |
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| 引用本文： | 李婷婷,徐争启,张新昌.攀枝花地区昔格达组地层稀土元素地球化学特征及其古环境意义[J].广东微量元素科学,2011,18(1):34-44. |
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| 作者姓名： | 李婷婷 徐争启 张新昌 |
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| 作者单位： | 李婷婷,LI Tingting(中国地质大学(北京)地球科学与资源学院,北京,100083);徐争启,XU Zhengqi(成都理工大学地球化学系,四川,成都,610059;北京师范大学水科学研究院,,北京,100875广东,广州,510640);张新昌,ZHANG Xinchang(中国科学院广州地球化学研究所边缘海重点实验室中国科学院研究生院,广东,广州,510640;中国科学院研究生院,北京,100049) |
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| 基金项目： | 四川省教育厅自然科学项目青年基金 |
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| 摘 要： | 昔格达组是广泛分布于我国西南地区的第四纪湖相沉积地层.对攀枝花青龙山砖厂内31.5 m厚的昔格达组剖面进行了稀土元素的研究,剖析了稀土元素及其比值在该地层中的分布特征和古环境意义.研究表明,剖面从31.5～14.8 m,各稀土含量较高;而从14.8～0 m,稀土含量整体降低.这一特征表明,在该地层沉积时期,沉积环境经历...
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| 关 键 词： | 稀土元素 古环境 昔格达组地层 岩性特征 |
Geochemistry Features and Palaeoenvironmental Significance of Rare Earth Elements in Xigeda Formation,Panzhihua |
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| LI Tingting,XU Zhengqi,ZHANG Xinchang.Geochemistry Features and Palaeoenvironmental Significance of Rare Earth Elements in Xigeda Formation,Panzhihua[J].Trace Elements Science,2011,18(1):34-44. |
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| Authors: | LI Tingting XU Zhengqi ZHANG Xinchang |
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| Institution: | 1.School of the Earth Sciences and Resourses,China University of Geosciences(Beijing), Beijing 100083,China;2.College of Geochemistry,Chengdu University of Technology, Sichuan Chengdu 610059,China;3.College of Water Sciences,Beijing Normal University, Beijing 100875,China;4.Guangzhou Institute of Geochemistry,Chinese Academy of Sciences, Guangdong Guangzhou 510640,China;5.Graduate University,Beijing 100049,China) |
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| Abstract: | Xigeda formation is widely distributed in the southwest region of China as a quaternary lacustrine sediment.By the study of the rare earth elements of Xigeda formation in Qinglongshan brick,Panzhihua,the evolution significance of the distribution of the rare earth elements and its ratio have analyzed.The results show that,in the thickness of 0~14.8 m of the profile,the content of each rare earth elments have reduced respectively.It indicated that the depositional environment between the thickness of the profile 0~14.8 m changed from weak oxygen-free environment to oxygen-free environment,whereas it is on the contrary between 14.8~31.5 m.The content of each element in the whole profile has an overall volatility feature,but the greater fluctuation indicating that there are several times sub-level changes in the environment during the deposition process stage.In sum,the sedimentary environment of this formation performance shows a weak oxygen-free/oxygen-free environment alternatively,largely dominated by warm,wet and reducing environment. |
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| Keywords: | rare earth element paleoenvironment Xigeda formation lithology |
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