Data underlying the research of Mg isotope compositions of river water and suspended load in the southeastern coastal region of China

Elemental and Mg isotope compositions of river water and suspended load, and the mineral type and content of suspended load from the river basin in the southeastern coastal region of China. Data are presented to investigate the Mg cycle during silicate weathering at basin scale.中国东南沿海流域河水与悬浮质的元素及镁同位素（Mg isotope）组成，以及该流域悬浮质的矿物类型与含量。本数据集旨在探究流域尺度硅酸盐风化过程中的镁循环。