厦门湾现代沉积环境特征研究

应用系统聚类和因子分析的方法分别对厦门湾112个表层沉积物样品的粒度组成和其中35个样品的矿物组成进行分析。结果表明:厦门湾可以划分为三种与沉积动力特征相对应的主要沉积环境区；表层沉积物中共发现碎屑矿物50种，其中重矿物38种，优势重矿物为磁铁矿、钛铁矿、褐铁矿、赤铁矿、绿帘石、角闪石、锆石等；表层沉积物主要由九龙江等入海泥沙和厦门湾周缘基岩风化侵蚀产物组成，部分为来自台湾海峡的物质。物质来源是影响研究区表层沉积物中重矿物分布的主要因素。

Study of Modern Sedimentary Environment in the Xiamen Bay

Hierarchical clustering and factor analysis are respectively applied to grain size and mineral analysis of sediment samples collected at 112 and 35 stations, respectively, in the Xiamen Bay. The results showed that the Xiamen Bay can be divided into three types of depositional environment areas corresponding to its' sedimentary dynamics properties. Fifty kinds of minerals were found in surface sediment samples, including 38 kinds of heavy minerals. The main heavy minerals include magnetite, ilmenite, limonite, hematite, epidote, hornblende, zircon, and so on. Surface sediments in the Xiamen Bay mainly included the suspended particles, discharged from the Jiulongjiang, and the particles materials of efflorescent rock around the Xiamen Bay, and partly came from the Taiwan Strait. Different source of particles was confirmed to be the mainly influencing factor of the characteristics of the minerals’ distribution.