河南嵩县庙岭金矿地质特征与钾长石^(40)Ar/^(39)Ar定年  

Geological characteristics and K-feldspar ^(40)Ar/^(39)Ar dating of the Miaoling gold deposit in Songxian County, Henan Province

作　　者：翟雷[1] 叶会寿[2] 周珂 孟芳[4] 高亚龙[5] 

机构地区：[1]河南省地质矿产勘查开发局第一地质调查队,河南洛阳471023 [2]中国地质科学院矿产资源研究所/国土资源部成矿作用与资源评价重点实验室,北京100037 [3]中国地质学会,北京100037 [4]中国地质大学(北京)地球科学与资源学院,北京100083 [5]天津华北地质勘查局,天津300170

出　　处：《地质通报》2012年第4期569-576,共8页Geological Bulletin of China

基　　金：中国地质调查局全国危机矿山接替资源找矿项目<河南省嵩县庙岭金矿接替资源勘查>(编号:200541020);<河南省栾川县康山金矿接替资源勘查>(编号:200841019)

摘　　要：河南嵩县庙岭金矿位于华北陆块南缘熊耳山—外方山地区。矿床赋存于中元古界熊耳群火山岩中近南北向断裂带内,矿体呈似层状、透镜状产出,矿石具浸染状、细网脉状构造和微细粒它形粒状晶粒结构、交代结构,围岩热液蚀变有硅化、钾长石化、绢云母化、黄铁矿化等,矿化具有多阶段的特点,属破碎带蚀变岩型金矿。成矿热液蚀变矿物钾长石Ar-Ar法测年的结果:坪年龄为121.6Ma±1.2Ma,等时线年龄为117.0Ma±1.6Ma,表明矿床形成于早白垩世,与熊耳山地区祁雨沟、瑶沟等金矿床形成于同一时期,属与早白垩世构造-岩浆-流体活动有关的产物。The Miaoling gold deposit in Songxian County of Henan Province is located in the Xiong′ershan-Waifangshan area on the south margin of North China craton.The ore deposit is hosted in the Mesoproterozoic volcanic rocks of Xiong′er Group,along a NS-trending fracture zone.Ore bodies occur in layered and lenticular forms,and ores have disseminated and stockwork structure with anhedral fine-grained texture and replacement texture.Hydrothermal alterations of the wall rock include silicification,K-feldspathization,sericitization,pyritization etc.Mineralizations show multi-stage characteristics and the gold deposit is of the fracture zone altered rock type.40Ar-39Ar plateau age and isochron age of K-feldspar are respectively 121.6Ma±1.2Ma and 117.0Ma±1.6Ma,indicating that the ore deposit was formed in Early Cretaceous,identical in age with Qiyugou,Yaogou and other gold deposits in Xiong＇ershan area.They therefore may be products of structure-magma-fluid activity in Early Cretaceous.

关 键 词：破碎带蚀变岩型金矿 钾长石40Ar-39Ar定年 庙岭金矿 河南 

分 类 号：P618.51[天文地球—矿床学] P534.53[天文地球—地质学]