本文利用经典的红外光谱定量分析原理,选用798cm~(-1),775cm~(-1)和875cm~(-1)分别作为石英、长石和方解石的分析吸收带,测定了东海陆架表层沉积物中这三种矿物的百分含量,结果表明,这三种矿物在该陆架的含量变化范围为石英10—70％,长石25—65％,方解石5—40％。从内陆架到外陆架,南部区域到北部区域其含量分布各有差异,主要与物质来源和沉积时代有关。 In this paper, the classical principle of quantitative analysis of infrared spectroscopy was used. The absorption bands of 798cm -1, 775cm -1 and 875cm -1 were selected as the analysis absorption bands of quartz, feldspar and calcite respectively. The surface sediments The results show that the contents of these three minerals in the shelf range from 10-70% quartz, 25-65% feldspar and 5-40% calcite. From the inner shelf to the outer shelf, the content distribution varies from the southern area to the northern area, mainly related to the material source and sedimentary age.