• 责任者：Li Jian (State Key Laboratory of Environmental Geochemistry ; Institute of Geochemistry ; Chinese Academy of Sciences ; Guiyang 550002 ; China) ; Zhang Wei
• 刊名：Acta Mineralogica Sinica
• 出版年：2009
• 卷期：29(4)
• 关键词：硅同位素 ; silicon isotopes ; 古环境 ; paleoenvironment
• 页码：p.530-535
• 图表：5 illus., 1 table, 22 refs.
• 分类号：1800
• issnNo：ISSN1000-4734
• isbnNo：CN52-1045/P

Silicon is essential for the growth of diatoms, which utilize dissolved silicic acid in lake water and form opaline silica (SiO₂· nH₂O). The silicon isotope compositions of diatom silica (δ³⁰Si_diatom) may thus record changes in the percentages of the utilization of dissolved silicic acid by diatoms, which can further reflect the changes of climate/environment. With the aim of exploring the potential of δ³⁰Si_diatom as an indicator of lacustrine environment, in this study, δ³⁰Si_diatom in the sediment core from Lake Huguangyan, a closed crater lake in Zhanjiang City, Guangdong Province, China, were firstly measured. The result shows that δ³⁰Si_diatom displays broad similarities of variations in contents of biogenic silica and organic carbon throughout the sediment core.