锡砂矿 tin placer
砂锡矿 [矿物] alluvial tin
砂锡 stream tin ; placer tin ; tin stream
露天锡砂矿 lombong
砂锡矿床 Alluvial Tin deposit
无锡蠡湖紫砂艺苑 wuxi Lake purple sand Garden
锡锌尾砂 Tin-zinc tailings
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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。
The basin was filled with thick sediments of Quaternary lake and alluvial facies and accumulated with tin placer which is locally enriched to be commercial deposit.
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