【摘要】 海洋沉积物的物质来源的定量、半定量研究，是海洋沉积学的重要课题之一，也是难题之一。本文是从沉积物不同成因组分的含量入手，研究冲绳海中段表层沉积物物质来源的一种尝试。首先介绍了常规法（即镜下鉴定和统计）和碳稳定同位素示踪法的基本途径和计算模式，并对两种方法进行了对比和评价。其次，根据沉积物的具体情况，选择比较合适的方法，定量估算了各站各成因组分的含量。最后根据估算结果，编绘了主要成因组分含量的分布图。更多还原

【Abstract】 The quantitation and semi quantitation study of the material sources of marine sediments is one of the important question for study in marine sedimentology. This paper is an attempt to study the different material sources of surficial sediments from the middle section of Okinawa Trough, proceeding with the analyses of the contents of the different contributing components. First, the main and calculating model for both the conventional method (microscopic identification and statistics) and the tracer methods for stable carbon istopes are introduced, and then a comparison and appraisal were made for on both methods. Next, the relatively reasonable methods were chosen in the light of specific conditions of the sediments. Quantitative calcularions were made for the contents of the different component of the sediments from each station. Finally, the distribution of the contents of the main contributing component were charted according to the calculated results.更多还原