海沧邻近海域表层沉积物中重矿物研究

THE RESEARCH OF HEAVY MINERALS IN THE SEDIMENT OF SURFACE LAYER IN THE SEA AREA AROUND HAICANG

对厦门海沧邻近海域表层沉积物中的重矿物 (0.063～0.125mm粒级 )进行了分析和研究 ,结果表明该粒级的重矿物共计49种 ,其优势和特征矿物为磁铁矿、赤铁矿、褐铁矿、绿帘石、钛铁矿、角闪石、锆石、红柱石等 ;重矿物的平均质量分数为9.56 % ;根据重矿物的分布和含量 ,并结合主要标志矿物的颗粒百分含量和分布特征 ,将该海域划分为5个矿物组合区 ,根据各区的矿物组合类型分析了该海域的物质来源及影响重矿物分布和组合的因素 ,进而探讨了九龙江河口湾和厦门西港海湾的沉积环境。

Heavy minerals sized between0.063-0.125mm present in the surface sediment in the sea area around Haicang(Xiamen city)were analyzed and studied.The results show there are49kinds of heavy minerals among which hematite,magnetite,epidote,ilmenite,hornblende,zircon and andalusite are the most prevalent and characteristic.Their average content was9.56%;5mineral assemblage zones were located according to heavy mineral distribution and content.Hence,the factor behind mineral zonation,provenance and sedimentogical environment deature in the Jiulong river estuary and Xiamen west bay are discussed.