摘要
在总结杜荒岭矿区地质特征的基础上,通过对测区地电提取元素特征参数值进行统计并探讨,采用传统异常下限计算方法确定背景值划分异常带,圈定了该区Au,Ag,Cu,Pb,Zn,As,Sb,Hg,Bi9个元素异常范围。依据各地电提取元素异常平面空间分布特征,认为应注意深部和外围的闪长玢岩、次安山岩、石英闪长岩和花岗斑岩及其接触带,以寻找Au、Cu矿化体为目标。R型聚类和R型因子分析,表明研究区深部具有盲矿体或深部还存在第二个Au富集地段的可能性,Au的富集经历了热液温度由低—高—低的过程,Au的沉淀发生在热液温度由高—低的整个降温过程中,在一定程度上解释了成矿成晕过程。根据地电提取Au元素异常分布特征、规模强度及其所处的地质环境,圈定出5个异常区,并综合评价各异常区的成矿前景,为杜荒岭外围区进一步找矿工作提供可靠的地球化学依据。
Anomaly zones for 9 elements （Au,Ag,Cu,Pb,Zn,As,Sb, Hg,and Bi） in the Du- huangling mine area are delineated through the statistics and discussion of geoelectric extraction characteristic parameter,combined with the tradition method for the geochemical threshold. On the basis of distribution characteristics of element abnormal, it is considered that attention should be paid to the deep and periphery of diorite porphyrite, andesite, quartz diorite and granite porphy- ry and its contact zone, aiming at looking for Au and Cu mineralization body. The results of the cluster analysis of R-type .and factor analysis of R-type show that it is likely that there are deep blind ore bodies, or a second Au rich region in the studied area. The enrichment of Au has experi- enced the process of hydrothermal temperature from low to high and from high to low, and the precipitation of Au occurred in the whole process of cooling from high tO low temperature. To a certain extent,the process of forming a deposit or a halo is explained. According to the anomaly distribution characteristics of the Au element geoelectric extraction and intensity and scale of geo- logical environment,5 prospecting targets are marked in the studied area and their metallogenic prospects are comprehensively evaluated. The result provides reliable geochemical evidence for Duhuangling periphery exploration.
出处
《矿物岩石》
CAS
CSCD
北大核心
2016年第3期64-72,共9页
Mineralogy and Petrology
关键词
地电提取
异常特征
R型聚类分析
R型因子分析
成矿前景分析
隐伏金矿
杜荒岭
吉林汪清
geoelectric extraction
anomaly characteristics
eluster analysis of R-type
faetor a-nalysis of R-type
metallogenic prospect analysis
hidden gold deposit
DuhuangLing
Jilin Wan-gqing
