The basin was filled with thick sediments of Quaternary lake and alluvialfacies and accumulated with tin placer which is locally enriched to be commercial deposit.
盆地中充填有第四纪湖相-冲积相厚层沉积，有砂锡聚集，局部富集成矿床。
2
The main sedimentary system includes fluvial, delta, alluvial fan and lake facies.
主要沉积体系为河流、 三角洲、 冲积扇及滨浅湖相。
3
The sedimentary facies can be classified into alluvial fan, fan delta, lake, stream and swamp.