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我们在编撰南黄海西部地貌及沉积物图集工作中,整理了该海区的矿物资料,编制了一套表层沉积物重矿物含量分布图及组合分区图,从中获得一些粗浅的认识,现整理成文.南黄海西部范围以31°43′N—37°10′N,西起沿岸 5米等深线至123°E.调查区面积约12万平方公里(图 1)地质部第一海洋地质调查大队1972—1980年在本区进行海洋地质调查时,基本上以10×10公里的同度取样,在沿岸地区加密至10×5公里,甚至5×5公里取样,取得了丰富的地质资料.本文以其中的1645个表层样的重矿物分析资料作为论述的基础.一、表层沉积物中重矿物组成及其含量分布特征调查区内表层沉积物的重矿物,经镜下鉴定有四十余种(表1).重矿物以硅酸盐类及氧化物类矿物为主,其次为少量的磷酸盐和硫化物类,再次为碳酸盐类.硅酸盐类矿物不仅种类繁多,而且其含量在整个重矿物中占压倒优势,接近80%.从表1不难看出,南黄海西部重矿物组成基本上是陆源的.自生矿物种类少,含量低,它们主要是一种
In the compilation of the work of the western Yellow Sea topography and sediments, we compiled the mineral data of the sea area, compiled a set of heavy mineral content distribution maps and combination zoning maps of the surface sediments, obtained some superficial understanding, . The western part of the southern Yellow Sea ranges from 31 ° 43’N-37 ° 10’N in the western part to 123 ° E along the 5-meter isthmus of the coast, covering an area of about 120,000 km 2 (Figure 1). The first marine geological survey When the brigade conducted marine geological surveys in the area from 1972 to 1980, it basically sampled at a density of 10 × 10 km and sampled 10 × 5 km or even 5 × 5 km along the coastal areas to obtain rich geological data. This article takes 1645 surface heavy minerals analysis data as the basis for discussion.First, the composition and content distribution of heavy minerals in the surface sediments Heavy minerals in the surface sediments of the survey area, identified by the mirror more than 40 Species (Table 1). Heavy minerals are mainly silicates and oxides, followed by a small amount of phosphate and sulfide, and again carbonate. Not only a wide range of silicate minerals, and its content Overwhelms the entire heavy mineral, approaching eight 0% .It is not difficult to see from Table 1, the composition of heavy minerals in the western part of the South Yellow Sea is basically terrigenous.Individual mineral species, low content, they are mainly a