渤海湾北部沉积物重矿物特征及物源分析

Analysis for Heavy Mineral Characteristics and Material Provenance in the Sediments of the Northern Bohai Bay

对取自渤海湾北部海域的167个表层沉积物样品的重矿物含量及特征进行了研究,分析表明研究区共有重矿物39种。用Q型聚类法将研究区重矿物划分出3个矿物区:Ⅰ区以高含量的辉石类、帘石类、金属类、稳定矿物为特征,主要受来自滦河的物源影响;Ⅱ区以高含量的角闪石类、云母类矿物为特征,主要物源为海河—黄河;Ⅲ区各种矿物含量中等,受多种因素影响,为混合物源。矿物区的划分客观地反映出物质来源和水动力等因素对重矿物分布的影响程度和范围。

The authors identified 167 surface sediment samples which were collected from the northern Bohai Bay.Heavy mineral analysis shows that there are 39 kinds of heavy minerals found in the study area.And heavy minerals in the study area can be divided into 3 mineral provinces according to the Q-cluster analysis.AreaⅠ is characterized by high content of pyroxene,epidote,metallic mineral and stable mineral.Minerals are mainly affected by the sediments of Luanhe River.Area Ⅱ is characterized by high content of amphibole,mica group.The major source is the Haihe River—Yellow River.The content of minerals in area Ⅲ is medium.The minerals are mixture source.The mineral provinces show the influences of material source and hydrodynamics on heavy mineral distribution.