渤海、黄海、东海沉积物中矿物组合的研究

A STUDY ON MINERAL ASSEMBLAGES IN SEDIMENTS OF THE BOHAI SEA, THE HUANGHAI SEA AND THE EAST CHINA SEA

本文对黄海、渤海、东海以及长江、黄河、辽河表层沉积物中的轻、重矿物进行了研究。分析资料表明,调查区内共有三种类型的矿物:陆源矿物、自生矿物和海底火山喷发形成的火山型矿物。根据轻、重矿物组合的差异,可把调查区分成8个矿物区。其物质来源主要为黄河与长江。黄河物质主要沉积在黄海、渤海;长江物质沉积在东海陆架区,而冲绳海槽则发现有海底火山喷发物质与浊流沉积。

The bottom-surface sediment samples were collected respectively from the Bohai Seae, Huanghai Sea, East China Sea and their tributaries: Huanghe River (Yellow River), Liaoh River, and Changjiang River. The results of our study showed that the mineral assemblages in the sediments of the area investigated can also be divided into three types: 1. terrigenous minerals 2. authigenic minerals 3. volcanic minerals from oceanic volcanoes. The studied area may be divided into 8 mineral provinces on the basis of their heavy and light mineral assemblages. Their source areas of the sediments are Huanghe and Changjiang Rivers. The sediments from the Huanghe River are deposited mostly in the Bohai Sea and the Huanghai Sea, but that contributed by the Changjang River are deposited on the continental shelf of the East China Sea. Besides sediments discharged from rivers, the volcanic matters and the turbidity sediments are found in the Okinawa Trough.