| 冀东分水岭岩体锆石U-Pb年代学、地球化学特征及地质意义 |
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| 引用本文： | 李玉静,王玉芳,徐国新,李智斌,齐云飞,孙金龙,赵丙刚,张勃,越悦.冀东分水岭岩体锆石U-Pb年代学、地球化学特征及地质意义[J].地质学报,2018,92(9):1904-1917. |
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| 作者姓名： | 李玉静 王玉芳 徐国新 李智斌 齐云飞 孙金龙 赵丙刚 张勃 越悦 |
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| 作者单位： | 河北省地质学会;河北省地矿局第八地质大队 |
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| 基金项目： | “河北省兴隆县太平村钼多金属矿成矿机制及找矿方向研究”(201406)资助。 |
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| 摘 要： | 冀东分水岭岩体位于马兰峪隆起西段,为复式岩体,其岩性为花岗闪长岩和黑云母二长花岗岩,花岗闪长岩呈带状环绕黑云母二长花岗岩分布,锆石U-Pb定年揭示其年龄分别为157.4±2.7Ma和162.0±4.0Ma。花岗闪长岩的SiO_264.50%~65.56%,K_2O+Na_2O 7.24%~7.70%,K_2O/Na_2O 0.58~0.67,A/CNK0.91~0.97,呈高硅富钾,属准铝质高钾钙碱性系列,为I型花岗岩;而黑云母二长花岗岩SiO_273.25%~74.56%,K_2O+Na_2O 7.22%~8.58%,K_2O/Na_2O 0.86~1.04,A/CNK 1.09~1.24,较花岗闪长岩更富硅、钾,为过铝质高钾钙碱性系列,属成熟度不高的A型花岗岩。两者稀土配分曲线呈右倾型式,具稀土总量较低,轻重稀土分馏明显,微量元素均亏损Nb-Ta、Zr-Hf,显示以壳源成分为主,具幔源混染特征。花岗闪长岩具弱Eu正异常,且富集Sr,源区深度较大;而黑云母二长花岗岩具Eu负异常,亏损Sr,源区有少量斜长石残留。岩体形成与太平洋板块俯冲构造背景密切相关,为中生代构造转换体制的产物。
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| 关 键 词： | 分水岭复式岩体 U-Pb锆石年代学 地球化学特征 岩浆起源 构造背景 |
| 收稿时间： | 2018/4/12 0:00:00 |
| 修稿时间： | 2018/6/13 0:00:00 |
Geochronology, Geochemical Characteristics in the Fenshuiling Complex in the East Hebei Province and Its Significance |
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| LI Yujing,WANG Yufang,XU Guoxin,LI Zhibin,QI Yunfei,SUN Jinlong,ZHAO Binggang,ZHANG Bo and ZHAO Yue.Geochronology, Geochemical Characteristics in the Fenshuiling Complex in the East Hebei Province and Its Significance[J].Acta Geologica Sinica,2018,92(9):1904-1917. |
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| Authors: | LI Yujing WANG Yufang XU Guoxin LI Zhibin QI Yunfei SUN Jinlong ZHAO Binggang ZHANG Bo and ZHAO Yue |
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| Institution: | The Eighth Geo-Team of Hebei Bureau of Geology and Mineral Resources, Qinhuangdao, Hebei, 066001,2) Geological Society of Hebei Province, Shijiazhuang, 050051,2) Geological Society of Hebei Province, Shijiazhuang, 050051,2) Geological Society of Hebei Province, Shijiazhuang, 050051,2) Geological Society of Hebei Province, Shijiazhuang, 050051,2) Geological Society of Hebei Province, Shijiazhuang, 050051,2) Geological Society of Hebei Province, Shijiazhuang, 050051,2) Geological Society of Hebei Province, Shijiazhuang, 050051 and The Eighth Geo-Team of Hebei Bureau of Geology and Mineral Resources, Qinhuangdao, Hebei, 066001 |
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| Abstract: | |
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| Keywords: | U-Pb zircon geochronology geochemical characteristics origin of magma tectonic setting Fenshuiling complex Hebei Province |
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