摘要
通过对马泉金矿床矿石品位分布的实际情况与相应数学模型进行对比,发现马泉金矿矿石品位分布规律为对数正态分布,从理论上证明该金矿矿体品位受1～2种主要地质因素的影响,即Au元素的赋存矿物主要是毒砂和黄铁矿,金矿质对于硫化物是有选择性的,但矿床的形成是多期次矿质叠加的结果。矿石品位分布的数学模型是均值为3.566×10-6、均方差为2.006×10-6的对数正态分布。通过对矿床平均品位算术平均值、几何平均值和变异系数的研究,认为矿床属品位均匀型矿床,建议矿床的边界品位为1.0×10-6,特高品位下限为29×10-6。矿床中高品位矿体(10×10-6～17.78×10-6)仍具有找矿潜力。矿床东部地带23号勘探线以东标高在1 700～1 800 m之间,仍具有很大的发展潜力。
Through comparison the ore grade distribution situation of Maquan gold deposit and the corresponding mathematical model,we discover ore grade distribution law shows log-normal distribution,theoretically prove that ore grade is controlled by 1～2 major geological factors,the occurrence mineral of gold elements is mainly arsenopyrite and pyrite mine,gold has a selective for sulfide,but forming of the deposit is more times superposition results.The mathematical model of ore grade distribution is mean 3.566×10-6,2.006×10-6 variance for log-normal distribution.Through study of the average grade of ore deposits,geometry average,arithmetic average and the coefficient of variation,we think that the deposit belongs to grade uniformity deposit,and boundary grade is 1.0×10-6,lower limit of high-grade is 29×10-6.High-grade orebody（10×10-6～17.78×10-6） has prospecting potential.23 exploration line of the deposit is located in the elevation between 1 800～1 700 m,and it has great development potential.
出处
《黄金科学技术》
2011年第2期1-7,共7页
Gold Science and Technology
基金
甘国土资勘发项目"甘肃省礼县中川地区金成矿规律研究"(编号:2009-15)资助
关键词
金矿品位
品位分布特征
对数正态分布
马泉金矿
甘肃省
Gold grade
Distribution characteristics of grade
Log-normal distribution
Maquan gold mine
Gansu Province
