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在一定地貌条件下,由于岩溶砂矿矿源物质运移的原地性,岩溶砂矿的聚散机制可以用计算的方法进行定量描述。 岩溶砂矿的富集或贫化与矿物(石)在原生矿(化)体中存在形式有关。矿物型者因其分散于原生矿(化)体,形成砂矿时由于体积缩小而相对富集。而矿石型因其成块状集中分布于围岩中,形成砂矿时由于体积增大和产生耗损而贫化。 岩溶砂矿品位聚散系数Kc与体积变化率Vp/Vo成反比;与原生矿石量和耗损率之差成正比。砂矿体积减小,Vp/Vo<1,砂矿富集;反之则Vp/Vo>1,砂矿贫化。 岩溶砂矿聚散率N与耗损率有关,耗损率增大,则聚集的砂矿成矿物质减少,反之则增多。
Under certain geomorphological conditions, due to the in-situ nature of the migration of mineral resources in karst sand mines, the mechanism of dispersion of karst sand mines can be quantitatively described by calculation methods. The enrichment or depletion of karst sand deposits is related to the existing forms of minerals (rocks) in primary ore bodies. Due to their mineral type dispersed in the primary ore (body) body, the formation of placer due to the relative reduction of volume and enrichment. However, the ore type is concentrated in the surrounding rock due to its massive shape, and is depleted when the sand body is formed due to the increase of volume and loss. The K c of karst sand grade is inversely proportional to the volume change rate Vp / Vo; it is proportional to the difference between the amount of primary ore and the depletion rate. The volume of the ore decreases, Vp / Vo <1, and the ore is enriched. On the contrary, Vp / Vo> 1, the sand is depleted. K dispersion rate of karst sand and depletion rate of N-related, wear rate increases, the accumulation of ore mineralization decreased, and vice versa increased.