粒度分析方法在沉积学中的应用
摘要
在沉积学方面,粒度分析数据主要应用于沉积物搬运机制、水动力条件、沉积环境的恢复,偶尔也可以应用于成岩环境的恢复。目前主要的方法是公式计算法和图版法。公式计算法通过概率累计曲线,可以计算出某些特有的粒度参数,通过这些粒度参数的区间范围或判别公式,确定该样品所属的搬运机制、水动力条件及沉积环境。图版法根据粒度数据在特定图版上的曲线形态或分布位置确定该样品的搬运机制、水动力条件及沉积环境。随着地质学理论方面的提高以及地球物理、地球化学学科的发展,粒度分析在实践中的应用也越来越广泛、完善,通过粒度分析的沉积环境解释公式及图解应逐步更新,多学科交叉共同恢复沉积环境。
引文
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[2]FOLK,ROBERT L.A review of grain-size parameters[J].Sedimentology,1966(6):73-93.
[3]SAHU B K.Depositional mechanisms from the size analysis of clastic sediments[J].Journal of Sedimentary Petrology,1964,34(1):73-83.
[4]VISHER G S.Grain size distributions and depositional processes[J].Journal of sedimentary petrology,1969,39(3):1074-1106.
[5]YUS Y,COLMANS M,LiL X.BEMMA:A hierarchical bayesian end-member modeling analysis of sediment grain-size distributions[J].Mathematical Geosciences,2016,48(6):723-741.
[6]BLOTT S J,PYE K.GRADISTAT:a grain size distribution and statistics package for the analysis of unconsolidated sediments[J].Earth Surface Processes and Landforms,2001,26(11):1237-1248.
[7]SUN D,BLOEMENDAL J,REA D K,et al.Grain-size distribution function of polymodal sediments in hydraulic and aeolian environments,and numerical partitioning of the sedimentary components[J].Sedimentary Geology,2002,152(3-4):263-277.
[8]FREDLUND M D,WILSON G W,FREDLUND D G.Use of the grain-size distribution for estimation of the soil-water characteristic curve[J].Canadian Geotechnical Journal,2002,39(5):1103-1117.
[9]WELTJE G J,PRINS M A.Genetically meaningful decomposition of grain-size distributions[J].Sedimentary Geology,2007,202(3):409-424.