Iron Isotope Study of Basalt Weathering Crust from the Huguangyan District, Zhanjiang, Guangdong Province
详细信息
- 责任者：Wang Shixia (Key Laboratory of Isotope Geology ; Ministry of Land and Resources ; Institute of Geology ; Chinese Academy of Geological Sciences ; Beijing 100037 ; China) ; Zhu Xiangkun
- 刊名：Acta Geologica Sinica
- 出版年：2013
- 卷期：87(9)
- 关键词：铁同位素 ; iron isotopes ; 同位素分馏作用 ; isotope fractionation ; 广东 ; Guangdong
- 页码：p.1461-1468
- 图表：4 illus., 2 tables, 42 refs.
- 分类号：0600
- issnNo：ISSN0001-5717
- isbnNo：CN11-1951/P
摘要
We measured weathering crust iron isotope composition of depth profile 1(4m)and depth profile 2(7 m)from Huguangyan district in Zhanjiang city,Guangdong province.The result shows that the distribution range of δ~57Fe in depth profile1is 0.17‰~0.57‰,and is 0.20‰~0.68‰in depth profile 2.Both depth profiles have heavy iron isotope composition.Iron isotope composition become increasing heavier from bottom to top in both depth profiles,and the positive correlation between heavy iron isotope enrichment and degree of weathering happened.It implied iron isotope composition of weathering crust can be the index of the degree of weathering.On the other hand,lithosphere,hydrosphere and biosphere can be linked by weathering process because iron isotope composition of weathering crust affected by plants and leaching.Iron isotope study on weathering will greatly complement supergene geochemistry udnerstanding and iron isotope can be used as powerful tracer to be applied.
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