Clay Mineralogy and Its Palaeoclimatic Indicator of the Late Paleocene to Early Oligocene Sediments in Yongdeng,
详细信息
- 责任者：Deng Yanping (Faculty of Earth Sciences ; China University of Geosciences ; Wuhan 430074 ; China) ; Hong Hanlie
- 刊名：Geoscience
- 出版年：2010
- 卷期：24(4)
- 关键词：古新世 ; Paleocene ; 渐新世 ; Oligocene ; 粘土矿物 ; clay minerals ; 甘肃 ; Gansu Province
- 页码：p.793-800
- 图表：5 illus., 51 refs.
- 分类号：1200
- issnNo：ISSN1000-8527
- isbnNo：CN11-2035/P
摘要
Clay mineralogy of the Late Paleocene to Early Oligocene sediments in Yongdeng, Lanzhou and their palaeoclimatic interpretations were investigated using X-ray diffraction（XRD） and scanning electron microscopy（SEM）. The results showed that clay mineral composition of the sediments was dominantly illite, smectite, and chlorite, with minor palygorskite. From the Late Paleocene to Early Oligocene, the sediments illite content showed an upward increase trend, while the smectite content exhibited an opposite trend to that of illite.