| 攀枝花青龙山昔格达组地层剖面微量元素地球化学特征及环境意义 |
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| 引用本文： | 罗辉,蒋实,徐争启.攀枝花青龙山昔格达组地层剖面微量元素地球化学特征及环境意义[J].广东微量元素科学,2012,19(8):48-56. |
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| 作者姓名： | 罗辉 蒋实 徐争启 |
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| 作者单位： | [1]核工业北京地质研究院环境工程研究所,北京100029 [2]中国国土资源航空物探遥感中心,北京100083 [3]．成都理工大学核技术与自动化工程学院,四川成都610059 |
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| 摘 要： | 对攀枝花青龙山昔格达组剖面进行了研究,分析了微量元素含量及其比值在剖面中的变化特征。结果表明,剖面中除Ba、Sr含量低于大陆上地壳外,其余元素含量均高于上地壳;w(Sr)/w(Cu)比值为1.81～4.50,δ(Ce)出现微弱负异常,反映整个剖面在沉积过程中,气候以温暖、湿润为主;w(Th)/w(U)比值偏高,且δ(Eu)显示中等程度负异常,反映剖面沉积环境总体偏还原性。样品中轻稀土富集,轻稀土含量与稀土总量呈显著正相关,说明地层中稀土元素特征主要受控于轻稀土的活动性,判断剖面沉积物为陆源特征。
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| 关 键 词： | 微量元素 地球化学特征 沉积环境 昔格达组地层 攀枝花 |
The Geochemical Characteristics and Environmental Significance of Qinglongshan Xigeda Strata Profile in Panzhihua |
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| LUO Hui,JIANG Shi,XU Zhengqi.The Geochemical Characteristics and Environmental Significance of Qinglongshan Xigeda Strata Profile in Panzhihua[J].Trace Elements Science,2012,19(8):48-56. |
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| Authors: | LUO Hui JIANG Shi XU Zhengqi |
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| Institution: | 1. Institute of Environmental Engineering, CNNC Beijing Research Institute of Uranium Geology, Beijing 100029, China; 2. China Aero Geophysical Survey ＆ Remote Sensing Center for Land and Resources, Beijing 100083, China; 3. Department of Geochemistry, Chengdu University of Technology, Sichnan Chengdu 610059, China) |
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| Abstract: | The Qinglongshan Xigeda profile in Panzhihua was studied, and the variation of trace element content as well as their ratio was analyzed. The results show that in addition to Ba, Sr, the content of other elements are all higher than the upper crust. The ratios of w（Sr）/w（Cu） is 1.81 - 4.50, and 8 Ce appeared weak negative anomalies, which reflect in the deposition process of the whole profile, climate mainly warm and moist. The ratio of w （Th）/w （U） is high, and 8Eu is moderate negative anomaly, which reflect the profile depositional environment overall bias reducing. LREE enrichment in the sample, LREE content and REE content has a significant positive correlation. This indicates that the characteristics of REE are controlled by the activity of LREE, the profile sediment have land - based sources characteristics. |
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| Keywords: | trace elements geochemical characteristics depositional environment Panzhihua dating from Xigeda Panzhihua |
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