河南商城鲢鱼尖变形花岗岩体地质、地球化学及含矿性特征  

Characteristics of geology,geochemistry and lithogenesis from Lianyujian deformation granite mass in Shangcheng of Henan,China

作　　者：张保平[1] 丁见广[2] 申开洪[2] 

机构地区：[1]河南省地质矿产勘查开发局区域地质调查队,郑州450051 [2]河南省地质调查院,郑州450051

出　　处：《世界地质》2007年第4期413-419,共7页World Geology

基　　金：中国地质调查局项目(2001300013)

摘　　要：河南商城鲢鱼尖变形花岗岩岩体的地质、地球化学特征、成因及含矿性研究表明，岩体具有贫SiO2、K2O，富Al2O3、TiO2、CaO、MgO、Fe2O3＋FeO之特征，Na2O＋K2O为7．65％～8．84％。K2O／Na2O为0．66～0．9；分异指数（Dr）为71．2～80．7，ASI值为0．81～0．98，氧化指数（OX）为0．55～0．32，8值为3．1～4．05，为准铝质钙碱性岩石系列。在An—Ab—Or图解及R1-R2多阳离子图解上多落于花岗闪长岩一二长花岗岩区，为斑状二长花岗岩-斑状花岗闪长岩。岩体与围岩接触带上可形成Cu、Pb、Zn、Ag、Mo多金属矿（床）。The study of characteristics of geology, geochemistry, lithogenesis and ore potentiality from Lianyujian deformation granite mass in Shangcheng of Henan, shows that SiO2 and K2O in low contents with Al2O3, TiO2, CaO, MgO, Fe2O3 ＋ FeO are high in contents; Na2O ＋ K2O ranging from 7.65 % to 8.84 % ; the ratio of K2O and Na2O is 0.66-0.9 ; the differentiation index （DI） is 71.2-80.7; the value of ASI is 0.81-0.98 ; the oxidation index （OX） is 0.55 -0.32 ; and δ is 3.1 -4.05. The results indicate that the mass belongs to metaluminous rocks series. The sample contents fall into granodiorite - adamellite area in the diagrams of AnAb-Or and R1-R2 more cations. The granite mass belongs to porphyritic adamellite- porphyritic granodiorite. The contact zone between the mass and country rock can form polymetallic ore （deposit）.

关 键 词：河南 商城鲢鱼尖 变形花岗岩 地球化学 含矿性 

分 类 号：P595[天文地球—地球化学]