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| 大兴安岭北段早石炭世洋岛型玄武岩的确立及成因意义 | |
| 引用本文： | 匡永生,赵书跃,秦秀峰,马江水,刘旭光,李仰春,张昱.大兴安岭北段早石炭世洋岛型玄武岩的确立及成因意义[J].吉林大学学报(地球科学版),2005,35(4):423-429. |
| 作者姓名： | 匡永生 赵书跃 秦秀峰 马江水 刘旭光 李仰春 张昱 |
| 作者单位： | 1. 兰州大学,资源环境学院,甘肃,兰州,730000;黑龙江地质调查研究总院,齐齐哈尔分院,黑龙江,齐齐哈尔,161005 2. 黑龙江地质调查研究总院,齐齐哈尔分院,黑龙江,齐齐哈尔,161005 3. 兰州大学,资源环境学院,甘肃,兰州,730000 4. 中国地质大学,北京,100083;黑龙江地质调查研究总院,黑龙江,哈尔滨,150036 |
| 基金项目： | 中国地质调查局科研项目 |
| 摘 要： | 大兴安岭北段根河地区早石炭世发育一套细碎屑岩及海相中-基性火山岩石组合,归属为莫尔根河组.其中基性火山岩为细碧岩、变玄武岩,岩石富Na2 O、K2O、TiO2,w(Fe2 O3)/w(FeO)=0.8(平均),属碱性系列.LREE富集,Eu无异常.Ti、Y、Yb略低于MORB外,其它元素高于MORB,具大洋板内玄武岩特征.w(87Sr)/w(86Sr)初始值为0.704 3,εNd(t)=3.00,表明岩浆源于富集地幔.本区莫尔根河组基性火山岩石形成的构造环境为地幔柱成因的夏威夷型洋岛环境. |
| 关 键 词： | 大兴安岭北段 早石炭世 地幔柱 洋岛 玄武岩 大兴安岭 早石炭世 洋岛型玄武岩 成因意义 Northern Early Carboniferous Volcanic Rock Basic 构造环境 富集地幔 岩石形成 岩浆源 特征 板内玄武岩 元素 异常 LREE 性系 变玄武岩 细碧岩 |
| 文章编号： | 1671-5888（2005）04-0423-07 |
| 收稿时间： | 2004-10-10 |
| 修稿时间： | 2004年10月10日 |
Establish and Genesis of Oceanic Island Basic Volcanic Rock Early Carboniferous in Northern of Daxing' anling |
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| KUANG Yong-sheng,ZHAO Shu-yue,QIN Xiu-feng,MA Jiang-shui,LIU Xu-guang,LI Yang-chun,ZHANG Yu.Establish and Genesis of Oceanic Island Basic Volcanic Rock Early Carboniferous in Northern of Daxing'''' anling[J].Journal of Jilin Unviersity:Earth Science Edition,2005,35(4):423-429. | |
| Authors: | KUANG Yong-sheng ZHAO Shu-yue QIN Xiu-feng MA Jiang-shui LIU Xu-guang LI Yang-chun ZHANG Yu |
| Abstract: | There occur a series of fine clastic sedimentary rock and medium-basic volcanic rocks assemblies (including the spite and meta-basic basalt) in Genhe area of North Daxing'anling Mts.,belong to Moergen Formation.The studies on their geochemical characteristis show that basic valcanic rorks high contents of Na_(2)O,K_(2)O,TiO_(2),w(Fe_(2)O_(3))/w(FeO)=0.8(average) (belong to alkaline series).Enrichment in LREE and with insignificant Eu anormalies ;compared with MORB,their lightly depleted in Ti, Y, Yb,but more enriched in others elements are similar to those of ocean intraplate basalts. Their initial w(~(87)Sr)/w(~(86)Sr) value is 0.7043,the _(Nd)(t) value is 3.00,indicate that their source region are related to mantle-source.Based on above data,this paper proposes that the activity of mantle plume lead to basic volcanic rocks formed,reflecting of Hawaii-type oceanic island tectonic enviroment. |
| Keywords: | North Daxing'anling Mts Early Carboniferous mantle plume oceanic island basalts |
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