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。
Placer tin 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。
Placer tin deposit in Xupu occurs in alluvial sediment of Quatemary SyStem and CaSSiterite chiefly concentrates at the bottom of Gravel layers.
盆地西缘距蚀源区近，坡度陡，形成了重力流成因的砾石质水下冲积扇。
The western margin of the basin was close to the source regions and very steep, so that pebbly subaquatic alluvial fans were formed that were deposited from a gravity flow.
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