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镇圩岩溶砂金矿床位于岩溶洼地内,其分布受原生金矿化范围严格控制;砂矿中的金和其他重矿物对原生矿化有明显的继承性,与砂金伴生的砾、碎矿来源于可溶岩中的夹层和矿脉等,这些特征反映该砂金矿床是由含金较贫的可溶性岩块组成的原生金矿化带,在岩溶作用下可溶部分被大量溶蚀、迁移,而金和其他不溶物则以“残渣”形式在原地堆积而成。矿床属完全蚀余型岩溶砂矿。包括崩溶和盆地堆积两种成因类型。 镇圩岩溶砂金矿床的富集机理系由可溶性岩组成的矿化带,在岩溶水的溶蚀、搬运作用下通过体积大量减缩来实现,经计算,体积缩小8.43倍,品位则提高6.465倍,砂矿相对富集。
Zhenxu karst gold deposits are located in the karst depressions and their distribution is strictly controlled by the range of primary gold mineralization. Gold and other heavy minerals in the sand mines have obvious succession to primary mineralization. Gravel and crushed ore associated with placer gold come from These features indicate that the gold-gold deposit is a native gold mineralized belt composed of relatively poorly-soluble gold-bearing rocks. The soluble part is largely dissolved and migrated under karstification, while gold and other Insoluble matter is “residue” form deposited in situ. The deposit is completely eroded residual karst ore. Including collapse and accumulation of two types of genesis. The enrichment mechanism of Zhenxu karst gold deposit is a mineralized belt composed of soluble rocks, which is realized through a large volume reduction under the action of karst water dissolution and removal. After calculation, the volume is reduced by 8.43 times and the grade is increased by 6.465 times. Sand The ore is relatively enriched.