Preliminary Analysis on the Elemental Geochemistry of Doushantuo Spherical Microfossils from the Weng’an Biota in South China
详细信息
- 责任者：Tang Feng (Institue of Geology ; Chineses Academy of Geological Sciences ; Beijing 100037 ; China) ; Gao Linzhi
- 刊名：Geological Review
- 出版年：2011
- 卷期：57(2)
- 关键词：微体疑问化石 ; problematic microfossils ; 元素地球化学 ; elements geochemistry ; 贵州 ; Guizhou Province
- 页码：p.175-184
- 图表：1 illus., 2 tables, 62 refs.
- 分类号：1101
- 出版序号：20120363
- issnNo：ISSN0371-5736
- isbnNo：CN11-1952/P
摘要
In this paper, the author analyzes the microfossils collected from Weng’an and Fuquan areas in Guizhou Province by electron probe micro-analyzer (EPMA) to obtain trace elemental geochemistry across the globular fossils. For comparison purposes, two types of fossils have been analyzed, including fossils with tumor-like outer wall and those with polygonal plate-shaped outer wall. The results from these fossils and their host rocks, preliminary findings are as follows: 1) fossils with tumor-like and plate-shaped outer walls have similar trends in major element contents from inside to the outer wall, suggesting the same affinity of the two groups; and 2) comparison with the host rocks, the globular fossils have higher P, Ca content and stronger capability of assimilation and accumulation for Na, Ni, Zn, and Cl, but less capacity for the absorption of Mg, K, Al, Si, Ti, Mn and Fe2+.