豫西石瑶沟钼矿围岩蚀变特征及矿床成因分析  

Wall Rock Alteration Characteristics and Deposit Genesis of Shiyaogou Molybdenum Deposit in Western Henan

作　　者：赵征 ZHAO Zheng(No.4 Institute of Geological&Mineral Resources Survey,The Fourth Mineral Survery Institute,Henan Bureau of Geology and Minerals Exploration,Zhengzhou 450000,Henan,China)

机构地区：[1]河南省地质矿产勘查开发局第四地质矿产调查院,河南郑州450000

出　　处：《中国钼业》2022年第1期8-13,共6页China Molybdenum Industry

摘　　要：石瑶沟钼矿床位于东秦岭地区NE向石窑沟—焦园断裂带与EW向马超营断裂带的交汇部位,目前共发现钼矿体1条,矿体赋存于NE向石瑶沟断裂带与近EW向的碎裂蚀变带交汇处的隐伏岩体的接触带附近,围岩主要为安山岩、流纹岩、粗面岩和花岗斑岩,矿区内围岩蚀变比较发育,其中与钼矿化关系密切的主要有钾化、硅化。钼矿体东西长1050 m,南北宽平均400 m,垂厚202~1071 m。钼矿床形成主要过程是深部岩浆底辟上侵期间,地下水深循环和成矿热流体在隐伏岩体接触带附近密集的裂隙中扩散、运移,矿质充填沉淀于这些裂隙之中而富集成矿,石瑶沟钼矿床就是形成的众多钼矿之一。因此认为,石瑶沟钼矿床的成因类型为斑岩型钼矿床。Shiyaogou molybdenum deposit is located at the intersection of the NE Shiyaogou-Jiaoyuan fault zone and the EW Machaoying fault zone in East Qinling area.At present,a total of 1 molybdenum ore body has been discovered,and the ore body occurs in NE Shiyaogou near the contact zone of the concealed rock mass at the intersection of the ditch fault zone and the EW-trending cataclastic alteration zone,the surrounding rocks are mainly andesite,rhyolite,trachyte and granite porphyry.Comparison of wall rock alteration in the mining area development,of which potassium and silicification are closely related to molybdenum mineralization.The molybdenum ore body has a length of 1050 m from east to west,an average width of 400 m from north to south,and a vertical thickness of 202~1071 m.The main process of molybdenum deposit formation is during the period of deep magma diapir intrusion,deep circulation of groundwater and ore-forming hydrothermal fluid diffuse and migrate in the dense fissures near the contact zone of the concealed rock mass,and the mineral filling sediments in these fissures and becomes enriched.Shiyaogou molybdenum deposit is one of the many molybdenum deposits formed.Therefore,it is believed that the genetic type of Shiyaogou molybdenum deposit is porphyry molybdenum deposit.

关 键 词：钼矿床 地质特征 矿床成因 

分 类 号：P618.65[天文地球—矿床学]