alluvial gold

基本解释

This paper has analysed the Hunan alluvial gold deposit and its present mining status.
本文分析了湖南砂金鑛牀及砂金的開採情況。
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This paper has made a detailed description of the possible ways to raise the recovery of fine alluvial gold from clay-bearing alluvial ore.
本文就提高含泥細粒砂金的幾種主要途逕，進行了較翔實的論述。
Shenzhen Zen alluvial gold velvet with gold, silver and copper as raw material, the electric casting is hollow, some manufacturers use is resin embryoid body, process and value will vary.
深圳天禪羢沙金採用的是金銀銅爲原材料，電鑄件是空心的，有些廠家採用的是樹脂的胚躰，工藝和價值都會有所不同。

He is one of many who have flocked to the Kangari hills in southern Sierra Leone to find small fortunes in the hard graft of alluvial gold mining.
"Because most of the gold deposits found in Sierra Leone, which had been worked on, were from the alluvial deposits.