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| 东昆仑喀雅克登塔格晚古生代辉长岩地球化学特征 | |
| 引用本文： | 任二峰,安守文,李焕学,刘 凯,孙照华.东昆仑喀雅克登塔格晚古生代辉长岩地球化学特征[J].地质找矿论丛,2012,27(1):96-102. |
| 作者姓名： | 任二峰 安守文 李焕学 刘 凯 孙照华 |
| 作者单位： | 1. 中国科学院青海盐湖研究所,西宁810001;青海省地质调查院,西宁810012 2. 青海省地质调查院,西宁,810012 3. 中国科学院青海盐湖研究所,西宁,810001 |
| 基金项目： | 国家自然科学基金项目（编号：1212010710321）资助 |
| 摘 要： | 文章通过对东昆仑喀雅克登塔格地区的辉长岩时代及地球化学研究发现,该辉长岩侵位于早泥盆世,属钙碱性系列,有向富镁方向演化的特点,岩石稀土总量为28.9×10-6～154×10-6,(La/Yb)N=4.1～5.1(＞1),显示岩石轻稀土富集的特点(LREE/HREE=3.52～5.60),岩石的Sm/Nd=0.23～0.... |
| 关 键 词： | 辉长岩 地幔源区 构造环境 喀雅克登塔格 东昆仑山 |
| 收稿时间： | 2010/5/10 0:00:00 |
Geochemical characteristics of Late Paleozoic gabbro at Kakedengtage of East Kunlun |
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| REN Er-feng , AN Shou-wen , LI Huan-xue , LIU Kai , SUN Zhao-hua.Geochemical characteristics of Late Paleozoic gabbro at Kakedengtage of East Kunlun[J].Contributions to Geology and Mineral Resources Research,2012,27(1):96-102. | |
| Authors: | REN Er-feng AN Shou-wen LI Huan-xue LIU Kai SUN Zhao-hua |
| Institution: | 1.Qinghai Institute of Salt Lakes,China Academy of Sciences,Xining 810012,China; 2.Qinghai Institute of Geological Survey,Xining 810001,China) |
| Abstract: | Age and geochemical studies on gabbro at Kayakedengtage,East Kunlun,Qinghai Province show that the gabbro was emplaced during Early Devonian belonging Ca-alklic series with evolution trend to Mg enrichment.The ∑REE are in range 28.9×10-6 to 154×10-6 with the obvious enrichment of LREE（La/Yh）=4.1-5.1（1）（LREE/HREE 3.52-5.60）,Sm/Nd of rocks 0.23-0.25,showing derivation of the gabbro from the depleted mantle.However,δ（Ce）= 0.87-1.0,the negative Ce anomaly indicates derivation of the gabbro from contact zone of mantle and crust or the enriched mantle.Combined with the basalt tectonic discrimination diagrams,the gabbro may be the product of the post Caledonian Qimantage orogen extensional environment. |
| Keywords: | gabbro mantle source tectonic environment Kayakedengtage East Kunlun |
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