黑龙江鸡东金场沟铜钼矿含矿岩体的主量元素特征及其构造环境  

Major element features of ore-bearing rock in Jinchanggou copper-molybdenum deposit of Jidong,Heilongjiang and its tectonic setting

作　　者：陈雪[1,2] 王建新[2] 张遵忠[1] 刘荣芳[1] 

机构地区：[1]江苏省有色金属华东地质勘查局,南京210007 [2]吉林大学地球科学学院,长春130026

出　　处：《世界地质》2010年第1期51-55,共5页World Geology

摘　　要：黑龙江鸡东金场沟矿区岩浆岩主要为花岗闪长斑岩,岩石SiO2含量为62.60%-64.18%,全碱（Na2O＋K2O）含量为6.57%-7.45%,K2O〉Na2O;MALI指数为4.48-6.68,ASI指数（铝饱和指数）为1.44-1.79〉1.1,富磷（〉0.2%）,属镁质、碱性、（强）过铝质花岗岩,且岩浆分异程度较高（DI=71.71-76.92）。该区的花岗闪长斑岩形成于碰撞后-造山晚期的构造环境,岩浆源区的物质可能主要来源于地壳物质,源岩可能是砂屑岩。The main magmatic rocks in Jinchanggou are granodiorite porphyry in category.The contents of the rocks are 62.60%~64.18% in SiO2,6.57%~7.45% in Na2O＋K2O,with K2O Na2O,4.48~6.68 in the modified calc-alkali index（MALI）,1.44~1.791.1 for alumina saturation index（ASI）,which shows P-riched（0.2%） and belongs to magnesian,alkalin and peraluminium granite,and having a high differentiation degree（DI=71.71~76.92）.The granodiorite porphyry formed in the tectonic setting of collision or late orogeny,and its source materials mainly sourced from the crust,and the source rock is most likely from the arenite.

关 键 词：金场沟 花岗闪长斑岩 构造环境 黑龙江 

分 类 号：P588.12[天文地球—岩石学] P595[天文地球—地质学]