The Gray Value of X ray Radiograph in Sediment Core and Its Influencing Factors
详细信息
- 责任者：Zhang Xilin (Key Laboratory of Submarine Geosciences and Technology ; Ministry of Education ; College of Marine Geosciences ; Ocean University of China ; Qingdao 266100 ; China) ; Fan Dejiang
- 刊名：Acta Sedimentologica Sinica
- 出版年：2012
- 卷期：30(2)
- 关键词：沉积物 ; sediments ; 岩心 ; cores
- 页码：p.318-324
- 图表：3 illus., 11 tables, 2 refs.
- 分类号：0803
- issnNo：ISSN1000-0550
- isbnNo：CN62-1038/P
摘要
Based on the matlab software platform, the authors obtained the X-ray images of the sediment core taken from the subaqueous Yangtze River delta and changed them into digital gray images then for extracting their gray values. Combined with the sediment properties in the core such as grain size parameters, influencing factors of the digital gray values were discussed. The results indicate that the gray values of sediment core are influenced comprehensively by sediment composition, texture and structure, with being dominantly influenced by sediment grain-size. There is a good linear relationship between mean grainsize and gray value. Furthermore, there is a positive correlation between sand, silt and gray value. In contrary, it is of a good negative relationship between clay and gray value. Generally, the X-ray image gray value of sediment core may be an ideal proxy of comprehensive sedimentary records.