| 东天山石炭纪企鹅山群火山岩岩石成因 |
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| 引用本文： | 李向民,夏林圻,夏祖春,徐学义,马中平,王立社.东天山石炭纪企鹅山群火山岩岩石成因[J].吉林大学学报(地球科学版),2006,36(3):336-341,390. |
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| 作者姓名： | 李向民 夏林圻 夏祖春 徐学义 马中平 王立社 |
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| 作者单位： | 1. 西北大学,地质系,西安,710069;西安地质矿产研究所,西安,710054
2. 西安地质矿产研究所,西安,710054 |
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| 基金项目： | 中国地质调查局地调项目(200313000063) |
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| 摘 要： | 土屋矿区南北大沟企鹅山群火山岩的岩石地球化学研究表明:东天山企鹅山群火山岩主要为拉斑系列,少量为钙碱系列;岩石类型为玄武岩、玄武安山岩、英安岩和流纹岩。稀土、微量元素和Sr、Nd同位素特点揭示:该火山岩系形成于大陆裂谷环境;其源区主要为软流圈地幔,同时有岩石圈地幔源组分卷入,酸性岩浆是玄武质岩浆结晶分异的产物。
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| 关 键 词： | 企鹅山群 火山岩 地球化学岩石成因 东天山 |
| 文章编号： | 1671-5888（2006）03-0336-06 |
| 收稿时间： | 2005-09-16 |
| 修稿时间： | 2005-09-16 |
Petroginesis of the Carboniferous Qi'eshan Group Volcanic Rocks in the East Tianshan |
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| LI Xiang-min,XIA Lin-qi,XIA Zu-chun,XU Xue-yi,MA Zhong-ping,WANG Li-she.Petroginesis of the Carboniferous Qi''''eshan Group Volcanic Rocks in the East Tianshan[J].Journal of Jilin Unviersity:Earth Science Edition,2006,36(3):336-341,390. |
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| Authors: | LI Xiang-min XIA Lin-qi XIA Zu-chun XU Xue-yi MA Zhong-ping WANG Li-she |
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| Abstract: | Study on the petrogeochemistry of the volcanic rocks of the Qi'eshan Group in the Nanbeidagou in the Tuwu ore area indicates that a majority of the Qi'eshan Group volcanic rocks belongs to tholeiitic series while minority belongs to calc-alkaline series;The Qi'eshan Group volcanic rocks consist of basalt,basaltic andesite,dacite and rhyolite.Studies on REE,trace elements and Sr,Nd isotopic compositions reveal that the Qi'eshan Group volcanic rocks were formed in a continental rift setting;their source region was most likely an asthenospheric mantle with lithosphere mantle involvement;Sili-(cic) magmas were derived by fractional crystallization of the basaltic magmas. |
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| Keywords: | Qi'eshan Group volcanic rock geochemistry petrogenesis East Tianshan |
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