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引用本文:王耀升,刘申芬,王俊鹤,秦学业,刘国庆,崔小玲. 东秦岭南泥湖钼铅锌银多金属矿田地球物理场特征与深部找矿预测[J]. 中国地质, 2018, 45(4): 803-818.
WANG Yaosheng,LIU Shenfen,WANG Junhe,QIN Xueye,LIU Guoqing,CUI Xiaoling. Geophysical field characteristics and deep ore prospecting prediction of the Nannihu molybdenum lead-zinc-silver polymetallic ore field in East Qinling Mountain[J]. Geology in China, 2018, 45(4): 803-818(in Chinese with English abstract).
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东秦岭南泥湖钼铅锌银多金属矿田地球物理场特征与深部找矿预测
王耀升1,2, 刘申芬1,2, 王俊鹤2, 秦学业2, 刘国庆2, 崔小玲2
1.河南省有色金属矿产探测工程技术研究中心, 河南 郑州 450016;2.河南省有色金属地质矿产局第五地质大队, 河南 郑州 450016
摘要:
南泥湖钼多金属矿田是中国重要的钼(钨)铅锌银多金属矿产地,已探明超大型钼(钨)矿床3处,大型钼(钨)矿床3处,中、大型铅锌银(金)矿床10余处。矿田具有优越的地质成矿条件,深部找矿潜力巨大。现有矿产勘查深度主要是500 m以浅范围,深部(500~2000 m)找矿工作基本为空白,需要使用综合地球物理方法研究深部成矿规律,预测新的矿产资源。文章通过研究该区地质、地球物理场特征和典型矿床物探异常特征,取得了有意义的研究成果。(1)确定了与成矿关系密切的隐伏岩体侵入模型:将全区隐伏岩体从南至北分为3个区,Ⅰ区隐伏岩体顶面深度0~800 m,分布面积约125 km2;Ⅱ区隐伏岩体顶面深度0.8~1.5 km,分布面积约158 km2;Ⅲ区隐伏岩体顶面深度1.5~3 km,分布面积约233 km2。(2)建立了立体成矿模型(根据成矿空间位置的不同从地表向下分为4个空间成矿区)和综合地球物理找矿模型(包括隐伏岩体、隐伏岩体顶上带、岩钟和斑岩体、矿体和矿化体的地球物理场标志)。(3)指出隐伏岩体顶上带及其上方的岩钟、岩脉、岩枝和小斑岩体等是成矿有利部位。(4)预测了找矿潜力;总结了寻找钼钨铅锌银金矿产的勘查方法技术组合。研究成果对在该区和类似矿区进行深部找矿工作具有重要意义。
关键词:  钼铅锌银矿田  地质地球物理场特征  立体成矿模型  成矿预测模型  找矿潜力  栾川南泥湖
DOI:10.12029/gc20180411
分类号:P618.2;P631
基金项目:河南省国土资源科技项目(2011-072)资助。
Geophysical field characteristics and deep ore prospecting prediction of the Nannihu molybdenum lead-zinc-silver polymetallic ore field in East Qinling Mountain
WANG Yaosheng1,2, LIU Shenfen1,2, WANG Junhe2, QIN Xueye2, LIU Guoqing2, CUI Xiaoling2
1.Nonferrous metal mineral exploration engineering technology research center of Henan Province Zhengzhou, 450016, Henan, China;2.Fifth Geological Brigade of Henan Bureau of nonferrous metals geology and mineral resources, Zhengzhou, 450016, Henan, China
Abstract:
The Nannihu molybdenum polymetallic orefield is an important production area of Mo (W) Pb, Zn, Ag polymetallic ore resources in China, which includes 3 proven super large molybdenum (tungsten) deposit, 3 large molybdenum (tungsten) deposits, and more than 10 medium and large Pb Zn Ag (Au) deposits. The orefield has superior geological metallogenic conditions and deep prospecting potential. The depth of the existing mineral exploration is mainly 500m to a shallow range, and the deep (500-2000 m) prospecting work is basically blank. It is necessary to use the integrated geophysical method to study the metallogenic regularity and predict the new mineral resources. By studying the geological and geophysical characteristics of the area and the geophysical anomalies of the typical deposits, significant research results have been obtained:(1) The intrusion model of the concealed rock mass is established, which is closely related to the mineralization. The whole concealed rocks are divided into three zones from south to north; the depth of the top of the buried rock is 0~800 m, and the distribution area is about 125 km2; the depth of the top of the buried rock is 0.8-1.5 km, and its distribution area is about 158 km2; the depth of the top surface of the buried rock is 1.5-3 km, and its distribution area is about 233 km2. (2) The three-dimensional metallogenic model, which is divided into four spatial metallogenic regions from the surface according to the different spatial locations of mineralization, and integrated geophysical prospecting model (the geophysical field marks of the concealed rock mass, the upper zone of the concealed rock mass, the kupola and the porphyry, the ore bodies and the mineralized bodies) are established. (3) It is pointed out that the concealed rock top belt and the kupola above it, dikes, apophyse and porphyry are favorable sites of mineralization. (4) Ore prospecting potential is predicted; the methods for prospecting of tungsten and molybdenum lead-zinc-silver gold mineral deposits are summarized. The research results have important significance for deep prospecting in this area and similar mining areas.
Key words:  molybdenum lead zinc silver orefield  geophysical field characteristics of metallogenic geology  three-dimensional metallogenic model  metallogenic prediction model  prospecting potential  Luanchuan Nannihu