【摘要】 本文提出了沉积相定量判别的一种新方法。选用多总体判别方法,在参数上不仅选择了粒度参数M_z,σ₁,Sk₁和K_G,还选用了与沉积相关系密切、在薄片中很易获取的成份参数,包括成份成熟度、杂基含量和胶结物的含量。利用多总体判别分析法建立起的粒度判别函数和成份判别函数不仅适用于两沉积相之间,也适用于多沉积相之间的判别,其正判率分别达76％和87％,高于Sahu判别式的正判率。这对于复杂沉积体系中沉积相（环境）的定量研究有一定参考价值。更多还原

【Abstract】 A new quantitative evaluation method on sedimentary facies is proposed in this paper. This method is the expension of Sahu’s evaluation function. Multiple-group judging analysis were chosen as the calculating method. For the choice of parameters, not only grain-size parameters, but also compositional ones including compositional maturity, matrix and cement, which are close to genesis of sendiment and easily available in thin sections, have been used. The grain-size evaluation function and the compositional, one based on the multile-group analysis were found to be applicable to two kinds of sedimentary facies and multiple facies. The corrected rates of two functions are up to 76% and 87% respectively. They are of certain value for quantitative research on sedimentary facies of a complicated depositional system.更多还原