| 大兴安岭富克山地区兴华渡口群地球化学及锆石U-Pb年龄特征 |
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| 引用本文： | 郑全波,李文龙,肖林,杨伟夫.大兴安岭富克山地区兴华渡口群地球化学及锆石U-Pb年龄特征[J].世界地质,2018,37(2):363-373. |
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| 作者姓名： | 郑全波 李文龙 肖林 杨伟夫 |
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| 作者单位： | 黑龙江省地质调查研究总院 齐齐哈尔分院, 哈尔滨 150036 |
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| 基金项目： | 中国地质调查局区调项目（12120114086301，DD20160047）资助. |
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| 摘 要： | 对富克山地区兴华渡口群岩石地球化学、锆石LA-ICP-MS U-Pb年代学研究结果表明,5件样品:Si O_2=50.24%~54.66%,Al_2O_3=14.41%~17.36%,Ca O=6.5%~8.68%,Na_2O=2.62%~4.67%,K_2O=1.36%~2.29%,Na_2O+K_2O=4.09%~6.3%,稀土总量∑REE=108.33×10~(-6)~240.28×10~(-6),稀土元素配分模式表现为轻稀土元素富集,重稀土元素相对亏损的右倾型曲线,具有弱的负铕异常。富集大离子亲石元素(K、Rb、Ba),相对亏损高场强元素(Nb、Ta、Zr、P、Ti等)。锆石U-Pb测年结果表明其岩浆形成时代为晚寒武世—早奥陶世(486.6±3.3 Ma)。富克山地区兴华渡口群原岩岩石组合类型为基性火山岩,为一套晚寒武世—早奥陶世活动大陆边缘火山建造。
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| 关 键 词： | 兴华渡口群 地球化学 锆石U-Pb年龄 富克山地区 大兴安岭 |
| 收稿时间： | 2017-11-30 |
| 修稿时间： | 2018-01-31 |
Geochemistry and zircon U-Pb dating of Xinghuadukou Group in Fukeshan area of Great Xing'an Range |
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| ZHENG Quan-bo,LI Wen-long,XIAO Lin,YANG Wei-fu.Geochemistry and zircon U-Pb dating of Xinghuadukou Group in Fukeshan area of Great Xing'an Range[J].World Geology,2018,37(2):363-373. |
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| Authors: | ZHENG Quan-bo LI Wen-long XIAO Lin YANG Wei-fu |
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| Institution: | Qiqihar Branch, Research Institute of Regional Geological Survey of Heilongjiang, Harbin 150036, China |
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| Abstract: | Research on geochemistry and LA-ICP-MS zircon U-Pb dating of the Xinghudukou Group in the Fukeshan area was carried out. Based on five samples, SiO2=50.24%~54.66%, Al2O3=14.41%~17.36%, CaO=6.5%~8.68%, Na2O=2.62%~4.67%, K2O=1.36%~2.29%, Na2O+K2O=4.09%~6.3%, ∑REE=108.33×10-6~240.28×10-6, with LREE enrichment and HREE depletions, right-inclined curves, and weak negative Eu anomalies. The rocks of the Xinghuadukou Group are characterized by enriched large ion lithophile elements(K, Rb, Ba)and depleted high field strength elements(Nb, Ta, Zr, P, Ti etc.). The zircon U-Pb dating shows that the magma of the Xinghuadukou Group formed in the Late Cambrian-Early Ordovician(486.6±3.3 Ma). The Xinghuadukou Group in the Fukeshan area consists of basic volcanic rocks, which belong to the volcanic formation of active continental margin in the Late Cambrian-Early Ordovician. |
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| Keywords: | Xinghuadukou Group geochemistry zircon U-Pb dating Fukeshan area Great Xing'an Range |
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