Sand gold deposit
砂金矿是由分布于松散碎屑沉积物中的自然金碎屑所形成的矿床。在钻探工程中采集砂金矿样品时,应自开孔就要连续分段采样。采样长度:泥砂层采样长度不得大于1m,在接近金矿砂层时,采样长度为0.2~0.5m,矿砂层采样长度为0.2~0.5m,难于钻进时可缩小采样长度。为了研究基岩岩性特征,在钻探工程中须采集适量基岩样品和标本。
The gold deposit is formed by the natural gold deposits distributed in the loose clastic sediments. When collecting the samples of sand and gold ore in drilling engineering, it should be continuous and segmented. Sampling length: mud sand sampling length should not be more than 1m, in close to the gold sand and sampling length for 0.2~0.5m, sand layer sample length of 0.2~0.5m, difficult to drilling can reduce sampling length. In order to study the lithology characteristics of bedrock, a proper amount of bedrock samples and samples should be collected in drilling engineering.