摘要
青海哈日扎矿区北区主要是以寻找与斑岩成矿系列有关的斑岩型—热液脉型—夕卡岩型多金属矿产为主。经岩石地球化学分析,与成矿关系密切的中酸性侵入岩是一种硅过饱和的低钙高钾(强)过铝质钙碱性岩石,其形成于火山弧—同碰撞花岗岩阶段;经流体包裹体显微测温分析,该矿区含矿流体为一种中温、中盐度和低密度的流体;由黄铁矿中Co的含量、Co/Ni及ω(Fe)/ω(S+As)反映出该矿区为中温型、中等深度成矿,并与岩浆热液成因相关。
The porphyry type-hydrothermal vein type-skarn type polymetallic deposits which are related to the porphyritic metallogenic series are the main prospecting targets in the northern part of Harizha area.Based on the lithological geochemical analysis,the intermediate and acid intrusive rocks related to mineralization are low calcium and high potassium peraluminous calc alkaline rocks with oversaturated silica which were formed in the granite stage in the volcano arc-syn-collision period.By the study of fluid inclusion micro-thermometry,the metallogenic fluid has characteristics of medium temperature,moderate salinity and low density.The metallogenic depth of deposits is medium deep which are associated with magmatic hydrothermal activities.
作者
马忠元
孙非非
郝娜娜
马成兴
朱传宝
郝艳
曹建辉
MA Zhong-yuan SUN Fei-fei HAO Na-na MA Cheng-xing ZHU Chuan-bao HAO Yan CAO Jian-hui(No. 3 Geological Survey Institute of Qinghai Province, Xining 810029 China University of C, eosciences（ Beijing） ,Beijing 100083)
出处
《矿产勘查》
2016年第6期929-937,共9页
Mineral Exploration
基金
中国地质调查局地质调查项目(编号:1212011140103)资助
关键词
哈日扎
花岗岩
地球化学特征
流体包裹体
成矿温度
成矿深度
青海
granite
geochemical characteristics
fluid inclusions
metallogenic temperature
metallogenic depth
Harizha
Qinghai
