山东省泗水县后等齐地区中粗粒变角闪辉长岩包体地球化学特征及其地质意义  

Medium coarse grained metaamphibolite gabbro xenoliths in houdengqi area,Sishui County,Shandong Province Geochemical characteristics and its geological significance

作　　者：张龙 ZHANG Long(Shandong Provincial NO.4 Institute of Geological and Mineral Survey,Weifang 261021,China)

机构地区：[1]山东省第四地质矿产勘查院,山东潍坊261021

出　　处：《世界有色金属》2021年第8期213-214,共2页World Nonferrous Metals

基　　金：2015年度山东省省级地质勘查招标项目[鲁勘字(2015)11号]资助。

摘　　要：山东省泗水县后等齐地区零星分布着大量中粗粒变角闪辉长岩包体,包体长轴方向基本呈北西向展布。岩石的SiO2含量为39.93~47.23,Al2O3含量为11.1~17.5,TiO2含量为1.34~2.2,MgO含量为4.77~12.97,以贫K2O(0.48~1.25)、NaO>K2O为特征,里特曼指数σ=-2.07~3.23,属于钙碱性系列,岩石形成于新太古代。A large number of medium coarse grained metaamphibolite gabbro xenoliths are sporadically distributed in houwait Qi area of Sishui County,Shandong Province,and the long axis direction of the xenoliths is basically NW.The contents of SiO2,Al2O3,TiO2 and MgO are 39.93-47.23,11.1-17.5,1.34-2.2 and 4.77-12.97,respectively.The rocks are characterized by K2O depletion(0.48-1.25)and Nao>K20.The ritmann index is-2.07-3.23,belonging to calc alkaline series.

关 键 词：地球化学 辉长岩 新太古代 

分 类 号：P588.12[天文地球—岩石学]