对西菲律宾海盆西部 Wp1 ,Wp2与 Wp40 3个岩柱中的 47个沉积物样品进行了重矿物组合的研究。分析结果表明 ,调查区内的重矿物中以辉石类为主 ,其平均含量可达 40～ 5 4%。它是海底火山的产物 ,为 3岩柱中存在火山沉积类型提供了依据 ,并根据辉石类含量在不同岩柱中的差异 ,说明 Wp2与 Wp40两个岩柱中的火山物质多于 Wp1岩柱 ,而 Wp1岩柱中的风成物质则较 Wp2与wp40两岩柱更为发育。 Forty-seven sediment samples from three pillars of Wp1, Wp2 and Wp40 in the western Philippine Basin were studied for heavy mineral assemblages. The results show that pyroxenes are the major heavy minerals in the survey area, with an average content of 40-54%. It is the product of submarine volcanoes and provides basis for volcanic sedimentary types in 3 pillars. According to the difference of pyroxene content in different pillars, it shows that there are more volcanic matters in Wp2 and Wp40 than in Wp1 Poles in Wp1 and Porphyra in Wp1 are more developed than those in Wp2 and Wp40.