【作者】 马田生；

【导师】 阳正熙； 李佑国；

【作者基本信息】 成都理工大学 ， 矿产普查与勘探， 2004， 硕士

【摘要】 焦家金矿床位于胶东西北部招掖成矿带内，西临著名的郯庐大断裂。矿体位于北北东—北东向延伸的破碎蚀变带中，受控于断裂构造，围岩蚀变以钾长石化(红化)、黄铁绢英岩化、硅化、碳酸盐化为特征。 在总结前人对焦家金矿床研究成果的基础上，进一步分析了焦家金矿床的地质特征，建立了矿床分带模型，认为焦家金矿床存在深部富集带。 运用地质统计学方法，对该矿床的金品位、品位厚度乘积进行了系统研究，研究结果表明：焦家金矿Ⅰ、Ⅱ、Ⅲ号矿体的变程依次减小，反映其矿化连续性依次减弱；在垂向方向上三个主要矿体的连续性强弱交替出现。 运用分形理论分别研究了矿体的品位、厚度、品位厚度乘积的分维值在垂向上的变化特征，根据分维值D的规律性变化，提出矿床深部三个主要矿体仍有较大延伸。 在灰色建模中，以矿体品位、厚度代表矿化的白化值，经过数据生成处理，建立了矿体品位、厚度灰色GM(1，1)模型。通过残差、后验差、关联度检验，研究了模型的可靠性，对影响预测模型精度的因素进行了分析，并提出了提高模型精度的方法；通过GM(1，1)模型预测Ⅰ、Ⅲ矿体金矿化强度自浅部向深部逐渐增强，Ⅱ号矿体品位自浅部向深部逐渐增高，但厚度有逐渐减小的趋势，总体矿化强度不及Ⅰ、Ⅲ矿体。更多还原

【Abstract】 Jiaojia Gold Deposit is located in the Zhaoyuan-Yexian gold belt in northwest Shandong Peninsula, which is bordered on the well-known Tancheng-Luzhong fault belt in the west. Gold mineralization was developed in the NNB- and NE-trending altered-fiactured zones. The alterations are characterized by K-feldsparization, pyretic-phyllic alteration, silicification, and carbonation.Based on the studies of the previous research results, the geological environment of the deposit is further analyzed, a zonal model developed, and enriched gold mineralization zone at depth interred.The geoslatistical results obtained show that the ranges of the three gold orebodies, No. I,II,and III, are successively decreased, indicating the mineralization continuity reduced; vertically, the three main orebodies present alternative changes in continuity.The fractal theory results calculated describes the vertical variation in gold mineralization, from which the extending at depth for the orebodies is inferredIt is predicted, with the gray GM (1,1) model, that the mineralization for both No. I and III is gradually intensified from shallow to the deep, and, although No. II gives the same character, its thickness trends to be reduced and it is weaker than the other two in mineralization intensity.更多还原