摘要
通过对大旗山铅锌矿区1∶10000岩石地球化学测量及钻孔原生晕数据运用聚类分析、因子分析数学统计方法,揭示了区内元素组合特征,将As、Sb、Au、Ag作为前缘元素组合,Pb、Zn、Cu、Sn作为近矿元素组合,W、Mo、Bi作为尾晕元素的组合。圈定了单元素异常和综合异常,优选AR3、AR4综合异常进行查证。通过地质填图、槽探揭露和钻探验证,圈定铅锌、铜锡银、金矿体39条,矿体最长2500 m,最大厚度23.65 m,矿体与异常对应关系良好,异常内带范围基本与矿(化)体范围一致。矿区位于北山干旱荒漠景观区,为避免风成砂的干扰,岩石测量采用网度100 m×20 m在该区取得了显著的找矿效果,对该区域找矿具有一定的借鉴价值。
Based on the 1∶10000 rock survey and primary halo data of borehole in Daqishan lead zinc mine area,cluster analysis and factor analysis mathematical statistical methods are used to reveal the characteristics of element combination in the area,and further delineate single element and comprehensive anomalies.The prospective comprehensive AR3 and AR4 anomalies in the mining area are preferred.Through geological mapping,trenching exposure,and drilling verification,39 ore bodies have been delineated,with a maximum length of 2500 m and the maximum true thickness of 23.65 m.The ore body corresponds well to the anomaly.Basically consistent with the scope of mineral(chemical)body.The mining area is located in the arid desert landscape area of Beishan.In order to avoid the interference of aeolian sand and prevent ore leakage,the basic network degree of 100 m×20 m is adopted in the rock survey,which has achieved remarkable prospecting effect in this area,and has certain reference significance for the prospecting in this area.
作者
叶红刚
樊新祥
陈晔
王鹏
YE Hong-gang;FAN Xin-xiang;CHEN Ye;WANG Peng(The Fourth Institute of Geology and Mineral Exploration,Gansu Provincial Bureau of Geology and Mineral Exploration and Development,Jiuquan 735000,China)
出处
《甘肃地质》
2020年第1期12-22,共11页
Gansu Geology
基金
甘肃省地勘基金项目“甘肃省肃北县大旗山铅锌矿普查(2019D00)”资助
关键词
岩石地球化学测量
化探异常特征
找矿效果
甘肃北山南带
Rock survey
Geochemical anomaly characteristics
Mathematical statistics
Comprehensive anomaly
Ore prospecting effect
Southern Belt of Bei Shan
