quaternary sedimentary ore deposit
sedimentary placer deposit 沉积砂矿床 quaternary sedimentary ore deposit 第四纪沉积矿床 organic-sedimentary ore deposit 有机沈积矿床 ..
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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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