海相碳酸盐岩稀土元素在古环境研究中的应用
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  • 英文篇名:Application of Rare Earth Elements of the Marine Carbonate Rocks in Paleoenvironmental Researches
  • 作者:王宇航 ; 朱园园 ; 黄建东 ; 宋虎跃 ; 杜勇 ; 李哲
  • 英文作者:Wang Yuhang;Zhu Yuanyuan;Huang Jiandong;Song Huyue;Du Yong;Li Zhe;State Key Laboratory of Biogeology and Environmental Geology,China University of Geosciences;Wuhan Center,China Geological Survey;Anhui Geological Museum;
  • 关键词:碳酸盐岩 ; 稀土元素 ; 铈异常 ; 影响因素 ; 古环境
  • 英文关键词:Carbonate rock;;Rare earth elements;;Ce anomaly;;Affecting factor;;Palaeo-environment
  • 中文刊名:DXJZ
  • 英文刊名:Advances in Earth Science
  • 机构:中国地质大学生物地质与环境地质国家重点实验室;中国地质调查局武汉地质调查中心;安徽省地质博物馆;
  • 出版日期:2018-09-10
  • 出版单位:地球科学进展
  • 年:2018
  • 期:v.33;No.287
  • 基金:国家自然科学基金项目“华南早三叠世深水相硫同位素演化”(编号:41402302);; 安徽省国土资源科技项目“安徽早三叠世巢湖龙动物群的古环境研究”(编号:2016-K-5)资助~~
  • 语种:中文;
  • 页:DXJZ201809006
  • 页数:11
  • CN:09
  • ISSN:62-1091/P
  • 分类号:42-52
摘要
海相碳酸盐岩稀土元素(REE)配分模式和含量比值在古海洋环境研究中发挥着重要的作用。尽管海相碳酸盐岩REE主要来源于海水,但是也可能受到陆源碎屑输入和后期成岩改造的影响,因此需要对获得的REE可靠性进行全面评估。与此同时,选取合适的分析方法对获得可靠的碳酸盐相REE含量至关重要。对碳酸盐岩REE的地球化学性质、化学分析与数据处理方法、可行性验证及古环境应用方面进行总结与展望。在未来工作中,应着重于建立更加完善的分析方法,结合宏观地质背景、微观岩相学特征、其他地球化学指标以及同期沉积页岩的REE信息,开展海相碳酸盐岩REE在古海洋环境的全球表现形式研究。
        The pattern,contents and ratios of Rare Earth Elements( REE) from marine carbonates play an important role in the paleo-environmental researches. As result of the REE's source being variable,which includes marine carbonates,detrital input and diagenesis,the overall assessment for the reliability of REE's data is necessary. Furthermore,appropriate analytical method is vital for the reliable contents of REE. This paper reviewed the geochemical properties,analytical and data processing methods,feasibility verification and paleo-environmental application of carbonates REE. The patterns of REE,which provide theoretical basis for the provenance and depositional environment of carbonates,are various with different sources. Cerium,as a redox sensitive element,is a key proxy for the reconstruction of paleo-redox conditions. There are two available analytical methods,acid-leaching method and direct LA-ICP-MS analytical method,to extract REE of seawater preserved in marine carbonate rocks.The contamination from detritus and diagenetic alteration can be detected by the correlations of various elements or element ratios. The REE of marine carbonate has been well applied to reconstruct the environment changes during the Precambrian,Permian-Triassic transition and Cenozoic.
引文
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