西天山阿吾拉勒赛肯都鲁序列与大哈拉军山组火山岩地球化学对比研究  

GEOCHEMISTRY CONTRAST OF THE SAIKENDULU SERIES AND DAHALAJUNSHAN FORMATION VOLCANIC ROCKS IN AWULALE, WESTERN TIANSHAN

作　　者：王晓刚 杨高学[2] 李永军[2] 郭文杰 毕明波[2] 李宏 佟黎明 

机构地区：[1]新疆维吾尔自治区地质矿产勘察开发局,新疆乌鲁木齐830000 [2]长安大学地球科学与资源学院,陕西西安710054

出　　处：《新疆地质》2007年第4期345-350,共6页Xinjiang Geology

基　　金：新疆地质矿产局"新疆新源县托库孜库马拉克一带1:5万区域地质矿产调查"(XJQDW2003-07)项目资助

摘　　要：岩石化学和元素地球化学研究表明,早石炭世赛肯都鲁序列和大哈拉军山组火山岩具有相似性,两者SiO2含量平均值分别为62.81%和63.21%,CaO含量较高,Na2O和K2O含量较低,K2O含量<Na2O含量.碱值平均值分别为0.36和0.44,A/CNK值均小于1.0,属钙碱性次铝质岩石.微量元素的分布特点均表现"先隆后凹"的右倾式,Sr、K、Rb、Ba、Th、Ta、Nb、P、Ce、Hf和Sm选择性富集,富集LREE、亏损HREE和有弱或微弱负Eu异常,两者共同构成了岛弧火成岩组合,表明赛肯都鲁序列和大哈拉军山组火山岩同源.The early Carboniferous Saikendulu series and Dahalajunshan Formation volcanic rocks are similar studied by petrochemistry ,trace element and REE,.The two SiO2 content average is 62.81% and 63.21%respectively, they are characterized by higher CaO,lower Na2O and K2O,K2O（wt%）〈Na2O（wt%）, alkalinity value is 0.36 and 0.44 respectively, A/CNK〈 1.0,belongs to calc—alkali and sub-aluminium,the trace element showing ＂top and down＂ and fight-incline mode in distributing map, Sr, K,Rb,Ba,Th,Ta,Nb,P, Ce,Hf and Sm is rich selectivity, characterized by island arc, rich LREE, poor LREE and Eu abnormity is delicacy, they are constitutes island arc igneous group in research area, showing Saikendulu series and Dahalajunshan Formation volcanic rocks are syn-ofigintion.

关 键 词：西天山 阿吾拉勒 大哈拉军山组 赛肯都鲁序列 地球化学 

分 类 号：P588.14[天文地球—岩石学]