Detection of Cyclostratigraphic Sequence Surfaces in Stratigraphic Record: Its Principle and approach
详细信息
- 责任者：Yi Haisheng (Institute of Sedimentary Geology ; Chengdu University of Technology ; Chengdu 610059 ; China)
- 刊名：Acta Sedimentologica Sinica
- 出版年：2012
- 卷期：30(6)
- 关键词：沉积旋回 ; sedimentary cycles ; 层序界面 ; sequence boundary
- 页码：p.991-998
- 图表：illus., 25 refs.
- 分类号：1200
- issnNo：ISSN1000-0550
- isbnNo：CN62-1038/P
摘要
In this paper, spectral analysis methods are used to study sedimentary cycle changes in depth domains in geophysic logging record. The authors propose that sedimentation rates have important control for cyclic wavelengths,spectrum peak patterns and continuities. Digital simulation tests show cyclic wavelength changes and spectral bands terminations along depth domain by sliding-widow spectral analysis, which indicate abrupt sedimentation rate changes. This method has been verified to be validity in deep sea sediment from ODP Site 154. The data processing procedures,which sedimentary cycle signals are extracted and check in spectral analysis,are described and illustrated in detailed. The upper Trassic Xujiahe Formation from the western Sichuan foreland basin as a case study, cyclostratigraphic sequence surfaces are calibrated based on evolutive spectral analysis from natural gamma log of Chuanya Hole 95. It is suggested that this methods have widely practical values compression with traditional seismic sequence.
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