The Mineralogical Characteristics of Cretaceous Albian Glauconite in Zanda, Southwestern Tibet of China
详细信息
- 责任者：Li Xiang (State Key Laboratory of Mineral Deposits Research ; School of Earth Sciences and Engineering ; Nanjing University ; Nanjing 210093 ; China) ; Cai Yuanfeng
- 刊名：Geological Review
- 出版年：2011
- 卷期：57(1)
- 关键词：海绿石 ; glauconite ; 西藏 ; Tibet
- 页码：p.63-72
- 图表：7 illus., 1 table, 51 refs.
- 分类号：0700
- 出版序号：20120123
- issnNo：ISSN0371-5736
- isbnNo：CN11-1952/P
摘要
Glauconite as a typical facies mineral is generally regarded as accompanied with transgression sequence, with a low sedimentation rate. Glauconite in the Xiala section from Zanda, southwestern Tibet of China, has been studied by observation under both petrographical microscope and Scanning Electron Microscope (SEM), and the analysis by X-ray Diffractometry (XRD), Fourier Transform Infrared spectroscopy (FTIR), Electron Probe Micro-analysis (EPMA). Based on the analysis of sedimentary environment and comparing of glauconite-bearing strata with others in adjacent areas, the authors conclude that the glauconitization in Zanda may be associated with the transgression which caused by final separation of the Indian Continent from the Australian-Antarctic Continent in the Late Albian. Long-term transgressive trend is indicated by the occurrence of the highly evolved glauconite.
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