河南栾川大竹园沟钨钼矿区地质特征及找矿远景

金属矿山 ›› 2019, Vol. 48 ›› Issue (09): 123-131.

河南栾川大竹园沟钨钼矿区地质特征及找矿远景

李万忠^1,2，方怀宾³，柴重阳¹，李珂莹⁴

1. 河南省地质科学研究所，河南郑州 450001; 2. 河南省金属矿产成矿地质过程与资源利用重点实验室，河南郑州 450001；3. 河南省地质调查院，河南郑州 450001；4. 河南省煤田地质局资源环境调查中心，河南郑州 450001

出版日期:2019-09-15 发布日期:2019-10-10
基金资助:
基金项目：中国地质调查局地质矿产调查评价专项（编号：1212011120772）。

Geological Characteristics and Prospecting Prospect of Dazhuyuangou W-Mo Deposit in Luanchuan County，Henan Province

Li Wanzhong^1,2，Fang Huaibin³，Chai Chongyang¹，Li Keying⁴

1. Henan Institute of Geological Science,Zhengzhou 450001，China；2. Henan Key Laboratory for Metallogenetic Geological Process of Metallic Minerals and Resource Utilization，Zhengzhou 450001，China；3. Henan Institute of Geological Survey，Zhengzhou 450001，China；4. Resources and Environment Investigation Center of Henan Provincial Coalfield Geology Bureau，Zhengzhou 450001，China

Online:2019-09-15 Published:2019-10-10

摘要/Abstract

摘要： 大竹园沟钨钼矿区位于华北陆块南缘与秦岭褶皱系的衔接部位、北秦岭构造带瓦穴子断裂北侧，成矿区带上处于秦岭—大别成矿省东秦岭金属-非金属成矿带宽坪Au-Mo-金红石矿化集中区内，为寻找钨钼多金属矿的有利地区。结合地质矿产调查1∶5万高精度磁法测量、1∶5万水系沉积物测量成果，总结分析了区域成矿地质背景。为查明矿区内地质成矿条件及中深部矿化特征，开展了1∶1万地质简测、1∶1万土壤化探及坑探、钻探等系统的矿床勘查工作。物化探异常及探矿成果研究表明：①区内钨钼矿床的主要控矿因素为岩体、构造，花岗闪长斑岩为成矿母岩，赋矿岩石为宽坪群二云石英片岩及花岗闪长斑岩，在断层或褶曲等构造部位，常常形成富矿体；②区内钨钼矿主体为斑岩型矿床，在内接触带花岗闪长斑岩中形成斑岩型矿体，在外接触带二云石英片岩中形成细脉状、浸染状钨钼矿体；③区内初步圈出了5条较大的钨钼矿体，其中 I1、 I2、 I3矿体赋存于宽坪群二云石英片岩中，为二云石英片岩型钨钼矿体； II1、 II2矿体赋存于花岗闪长斑岩与宽坪群二云石英片岩的接触带上，为斑岩型钨钼矿体；④区内圈出了3处钨钼找矿靶区（编号分别为A、B和C），经过工程验证发现靶区内深部存在隐伏花岗闪长斑岩体及多条钨钼矿体，且靶区A内 I1、 II1两条矿体估算的（3341）资源量达中型规模。综合区内成矿地质条件、成矿物质来源以及类比邻近同类型矿床，认为大竹园沟一带中深部具有较大的找矿潜力，值得进一步开展工作。

关键词: 钨钼矿, 深部找矿, 斑岩型矿床, 找矿靶区

Abstract: The Dazhuyuangou tungsten-molybdenum ore district is located at the junction of the southern margin of the North China block and the Qinling fold system，and the north side of the North Qinling structural belt.The ore-forming zone is located in the Au-Mo-rutile mineralization zone of the East Qinling metal-nonmetal mineralization belt in the Qinling-Dabie metallogenic province，which is a favorable area for finding tungsten-molybdenum polymetallic ore.Combined with results of 1∶50 000 high-precision magnetic measurement and 1∶50 000 water sediment measurement results，the regional metallogenic geological background is analyzed.In order to find out the geological mineralization conditions and the mineralization characteristics of the middle and deep areas in the mining area，systematic survey and exploration works such as the 1∶10 000 geological survey，1∶10 000 soil geochemical exploration and exploration of pit and drilling are carried out.With combination of geophysical and geochemical anomalies and ore-prospecting，the study results show that:①the tungsten-molybdenum ore deposit is mainly controlled by structure and rock mass，and the granodiorite porphyry body provides a mineral source for mineralization，the ore-bearing rocks are quartz schist of Kuanping Group and granodiorite porphyry，and often form ore-rich bodies in structural parts of faults or folds；②main body of the tungsten-molybdenum deposit is porphyry deposit，porphyry-type ore body is formed in the granodiorite porphyry in the inner contact zone，fine vein-like，disseminated tungsten-molybdenum ore body is formed in the outer contact zone of the quartz schist；③five large tungsten-molybdenum ore bodies are initially delineated in the mining area，the I1，I2， and I3 ore bodies occur in the quartz schist of the Kuanping Group，which is the quartz schist-type tungsten-molybdenum ore body，and the II1 and II2 ore bodies occur in the contact zone between the granodiorite porphyry and the quartz schist of Kuanping Group，which is a porphyry tungsten-molybdenum ore body；④three tungsten-molybdenum prospecting targets are delineated in the mining area （named as A，B and C），by engineering verification，there are hidden granodiorite porphyry bodies and multiple groups of tungsten-molybdenum ore bodies in the deep part of the project area，and two ore bodies of I1 and II1 in target area A are estimated，in which the （3341） resources reached a medium size.Based on the ore-forming geological conditions，sources of ore-forming materials and similar types of deposits in the mining area，it is considered that there are large prospecting potential in the middle and deep areas of Dazhuyuangou area，which is worthy of further investigation.

Key words: W-Mo deposit, Deep prospecting, Porphyry-type deposit, Prospecting target area

李万忠, 方怀宾, 柴重阳, 李珂莹. 河南栾川大竹园沟钨钼矿区地质特征及找矿远景[J]. 金属矿山, 2019, 48(09): 123-131.

LI Wan-Zhong, FANG Huai-Bin, CHAI Zhong-Yang, LI Ke-Ying. Geological Characteristics and Prospecting Prospect of Dazhuyuangou W-Mo Deposit in Luanchuan County，Henan Province[J]. Metal Mine, 2019, 48(09): 123-131.

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