河南嵩县安沟钼多金属矿床的地质特征与成因

安沟钼矿产于东秦岭钼成矿带燕山期花岗岩与花岗斑岩发育处。采用系统的地质勘测手段与微量元素特征分析方法对矿床的地质特征和矿床成因进行研究。结果表明:区内花岗类岩体w(Rb)/w(Sr)值较低,说明该岩浆来源较深;地层与岩体中Mo元素含量远高于平均值,在矿体周边岩体的Mo含量极低,说明岩浆与热液之间存在强烈的萃取作用;Pb与Au和Ag在成因上呈正相关,钼矿与其他元素成矿关系不明显;矿床为斑岩-爆破角砾岩型,成矿过程可归纳为中生代拆离断层体系形成、岩浆侵位与矿质元素萃取、超浅成侵位与爆破作用及热液成矿4个阶段。

Geological characteristics and genesis of Angou molybdenum polymetallic deposit, Songxian, Henan Province, China

Angou molybdenum deposit is located in the molybdenum ore belt in East Qinling,where Yanshanian granite and granite porphyry are exposed.Systematic geological survey and trace element analysis were used to identify the geological features and genetic type of the deposit.The results show that the low w(Rb)/w(Sr) ratios of the granite-like rock indicate the deep source of magma,the molybdenum content of the stratigraphy and igneous rock is much higher than the average,the very low molybdenum content around the ore body indicates that extraction of magma and hydrothermal effects is strong.Pb is positively correlated with Au and Ag.The relationship between mineralization of molybdenum and other elements is not obvious,Angou molybdenum deposit is defined as a porphyry-blasting breccias type deposit.Ore-forming processes can be summarized as the formation of the detachment fault system in mesozoic,magma emplacement and mineral extraction,ultra-shallow emplacement and blasting and hydrothermal mineralization.