The basin was filled with thick sediments of Quaternary lake and alluvial facies and accumulated with tinplacer 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
Placertin deposit in xupu occurs in alluvial sediment of quatemary system and cassiterite chiefly concentrates at the bottom of gravel layers.
溆浦砂锡矿床赋存在第四系冲积层中锡石主要富集在底部砂砾石层。
3
Placertin deposit in Xupu occurs in alluvial sediment of Quatemary SyStem and CaSSiterite chiefly concentrates at the bottom of Gravel layers.