论文部分内容阅读
通过对沙溪矿区含矿与不含矿斑岩中斜长石斑晶的粒度统计，计算出平均矿物粒度（Ｓ）、矿物分布密度（Ｄ）及矿物分布均匀度（Ｈ）；再根据晶体大小分布理论（ＣＳＤ），计算出斜长石的晶体生长速率、成核密度及成核速率等岩浆结晶动力学参数；发现含矿斑岩较无矿斑岩有高的成核密度和成核速率，而晶体生长速率则较低；指出成分相近的斑岩在岩浆结晶动力学特征上的极细差别可能造成岩体含矿性明显不同
The mean mineral size (S), mineral distribution density (D) and mineral distribution uniformity (H) were calculated from the grain size statistics of plagioclase phenocrysts in ore-bearing and non-ore-bearing porphyries in Shaxi mining area. Size distribution theory (CSD), calculated the crystal growth rate, nucleation density and nucleation rate of plagioclase and other magma crystallization kinetics parameters; found that ore-bearing porphyry ore-bearing porphyry than the high nucleation density and nucleation While the rate of crystal growth is lower. It is pointed out that the extremely fine differences between the porphyries with similar compositions in the magma crystallization kinetics may lead to the obvious difference in the ore-bearing capacity of the rock mass