东秦岭东沟超大型钼矿床地质地球化学特征及找矿意义  

Geological and geochemical characteristics and prospecting significance of Donggou super-large Molybdenum deposit in Eastern Qinling

作　　者：王令全[1] 崔蓓蕾[1] 吴飞[1] 

机构地区：[1]河南省地质矿产勘查开发局第二地质勘查院,河南许昌461000

出　　处：《矿产与地质》2014年第6期744-751,共8页Mineral Resources and Geology

摘　　要：河南汝阳东沟超大型斑岩型钼矿床位于东秦岭巨型钼成矿带的中部;矿床的发现和探明,源于区域地球化学异常的导引。从1∶20万到1∶5万分散流地球化学的指示作用,到1∶1万次生晕地球化学的分布状态,揭示了东沟区域地球化学首先是富钼的;其各种比例尺的Mo元素异常均有清楚显示,尤其是1∶1万次生晕Mo异常更是中、小比例尺地球化学异常的再现和加强。因此说,钼的找矿意义就是地球化学找矿的手段的选择和方法的应用。在强度上,1∶1万次生晕10×10-6的异常可界定为矿致异常,这不仅是东沟,也是从其他几个超大型斑岩型钼矿床次生晕异常的找矿标志方面得到很好的印证。Donggou super-large porphyritic Mo deposit in Ruyang of Henan is located at the central part of the large scale Mo metallogenic belt in Eastern Qinling.The discovery and verification of the deposit is guided by regional geochemical anomalies.According to the geochemical indication of dispersion train survey at the scale from 1:200000 to 1:50000 and the distribution characteristics of geochemical secondary halo at the scale of 1∶10000,it is suggested that molybdenum is the richest element in Donggou region.The Mo anomalies are shown clearly in maps of various scales,and 1:10000 secondary halo Mo anomalies are particularly the representation and intensification of geochemical anomalies in maps of medium and small scales.Therefore, the prospecting significance of molybdenum can be regarded as the selection and application of geochemical prospecting methods.In the respect of the anomaly strength,10×10-6 anomaly of 1:10000 secondary halos can be defined as mineral caused anomaly.It is proved as the prospecting clues of secondary halo anomaly in Donggou as well as in several other super-large porphyritic molybdenum deposits.

关 键 词：超大型钼矿床 分散流 次生晕 汝阳东沟 东秦岭 

分 类 号：P618.65[天文地球—矿床学]