黄河、滦河三角洲的物质组成及其来源

研究沉积物中的矿物组分,对于阐明沉积作用的过程具有重要意义。它不仅可以说明沉积物的物质组成、分布规律以及物质来源,而且还可以进一步了解蚀源区的母岩成分及其矿物在搬运过程中的变化规律。为了研究黄河、滦河三角洲的物质组成及其来源,本文对黄河、滦河三角洲表层的近百个碎屑矿物样品进行了研究。

THE CHARACTERISTICS OF MATERIAL COMPONENT AND THE MATERIAL RESOURCES IN HUANGHE (YELLOW) RIVER, LUANHE RIVER

The mineral contents are not alike, because the rivers flow through different mother rocks. Huanghe (yellow) River is rich in less stable mineral (Epidote) and stable mineral (Pyrope). Luanhe is rich in stable minerals (ilmenite magentite) and most stable minerals (Zircon). The minerals of Huanghe delta come mainly from the Xiaolangdi region and Tais-hang mountain areas. The minerals of Luanhe delta come not only from the erosion areas of granite and metamorphic rock in middle course, but also from lower mounts and hills in north delta.The mineral size of Huanghe, Luanhe deltas ranges from 0.05 mm to 0.005 mm.