摘要
利用大洋-50型海底取样器,在南黄海和东海北部陆架(125°E以西)海上调查获取了海底表层沉积物样品,其中包括1998年以来"黄东海地质地球物理补充调查"和"中韩黄海沉积动力学与古环境演变"2项研究所获得的样品共380个,选取0.063～0.125mm粒级的沉积物,进行碎屑矿物分析,最后选出9个代表性的优势重矿物种的数据为变量,利用Q型聚类(分层聚类)的数学方法,进行聚类组合,在数学统计的基础上,将研究区划分出4个重矿物组合区。客观地反映出黄河物质、长江物质和原地物质的影响范围,同时也体现出物质来源和水动力以及海底风化作用对重矿物分布的影响程度和范围,因而可以得出,在一定的范围内陆架表层沉积物中的重矿物具有趋同的演化效应。
The surface sediment samples were collected from the shelf of the southern Yellow Sea and the northern East China Sea by using Ocean50 box corer. 380 sediment samples include the samples collected from the surveys under the projects 'Supplementary Survey of Geology and Geophysics in the Yellow Sea and East China Sea' and 'Sedimentary Dynamics and Paleoenvironmental Changes in the Yellow Sea'. The sediments with grain size of 0.063 to 0.125 mm were chosen for the detrital mineral analysis, the data of 9 representative minerals were taken as variables, and the hierarchical cluster procedures were used to divide the study area into 4 heavy mineral assemblage provinces. The provinces objectively reflect the influence ranges of the Yellow River material, the Yangtze River material and the insitu material, and also show the influences of material source, hydrodynamics and sea bed weathering on heavy mineral distribution, so it can be concluded that the heavy minerals in shelf surface sediment in some areas have a convergent evolution effect.
出处
《海洋科学进展》
CAS
CSCD
北大核心
2003年第1期31-40,共10页
Advances in Marine Science
基金
国家自然科学基金资助项目--黄海沉积物热光性标型特征及其指示意义(49976018)
"中韩黄海沉积动力学与古环境演变"合作项目(1991-2001)
关键词
南黄海和东海北部陆架
重矿物
组合分区
物质来源
shelf of the southern Yellow Sea and the northern East China Sea
heavy mineral
assemblage province
material source
