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通过对南黄海表层沉积物样品的单颗粒碎屑石榴石进行电子探针测试,确定其化学组成特征及2种主要的石榴石组合,即分布在中北部的低Mg高Mn的中低级变质岩和接触变质岩组合、中南部高Mg低Ca的中—高级变质岩组合,根据石榴石在物源端元三角形图解中的分布,探讨其物源组成,将研究区划分出3个物源相应区,分别是长江物源相应区、黄河物源相应区和二者之间的混合过渡区域。此外,近岸的山东半岛等近源物质对南黄海表层沉积物的石榴石组成也有影响。
The single-particle detritus garnet in the southern Yellow Sea surface sediment samples was tested by electronic probe to determine its chemical composition and two main garnet assemblages, that is, middle-low metamorphic rocks with low Mg and Mn in central and northern China And metamorphic rock assemblages, middle-high metamorphic rocks with high Mg and low Ca in central-southern China. According to the distribution of garnet in the terminal triangular diagram of the provenance source, the provenance composition of the study area is divided into three provenances They are the corresponding areas of the source materials of the Yangtze River, the corresponding areas of the Yellow River and the mixed transitional areas between the two. In addition, near-shore Shandong Peninsula and other near-source materials have also affected the composition of garnet in the surface sediments of the South Yellow Sea.