placer gold 沙金
placer gold deposit 砂金矿床
placer gold mine 砂金矿山
placer gold sample 砂金样品
placer gold mining 砂金矿开采
placer gold mineral 砂金成矿
placer gold samples 砂金样品
The REE contents of 84 placer gold samples and 7 hard rock gold samples in Heilongjiang province are determined by plasma mass spectrographic analysis.
对黑龙江省84个砂金样品及7个岩金样品，用等离子质谱仪分析了它们的稀土元素含量。
A placer gold area is usually distributed in the flowing regions of plain terrain, belt-like rivers.
砂金地区一般分布在地形平坦、呈带状的江河流域。
The coefficient of dissolution can indicate the source of placer gold.
溶蚀系数可指示砂金是近或远原生源金矿。
应用推荐