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| 黑龙江伊春地区晚三叠世—早侏罗世铝质A型正长-碱长花岗岩地球化学特征及其构造意义 | |
| 引用本文： | 韩振哲,赵海玲,王盘喜,杨 霄,牛延宏,赵寒冬.黑龙江伊春地区晚三叠世—早侏罗世铝质A型正长-碱长花岗岩地球化学特征及其构造意义[J].岩石矿物学杂志,2009,28(2):97-108. |
| 作者姓名： | 韩振哲 赵海玲 王盘喜 杨 霄 牛延宏 赵寒冬 |
| 作者单位： | 1. 中国地质大学,地质过程与矿产资源国家重点实验室,北京,100083;中国地质大学,岩石圈构造、深部过程及探测技术教育部重点实验室,北京,100083;黑龙江省地质调查研究总院,齐齐哈尔分院,黑龙江,齐齐哈尔,161005 2. 中国地质大学,地质过程与矿产资源国家重点实验室,北京,100083;中国地质大学,岩石圈构造、深部过程及探测技术教育部重点实验室,北京,100083 3. 中国地质大学,地质过程与矿产资源国家重点实验室,北京,100083 4. 黑龙江省地质调查研究总院,齐齐哈尔分院,黑龙江,齐齐哈尔,161005 |
| 基金项目： | 中国地质调查局基础地质调查项目，国家自然科学基金 |
| 摘 要： | 黑龙江伊春地区晚三叠世-早侏罗世正长-碱长花岗岩的岩石学和主、微量元素及同位素分析结果表明,岩石中大多含有高温自形或锥形石英、副矿物萤石和文象结构、晶洞构造等;岩石化学特征上具有高硅、富碱和低钙镁、偏铝质-过铝质特点,稀土元素配分模式呈轻稀土元素略微富集的、缓向右倾斜而重稀土元素较为平坦、铕亏损的海鸥型,富集高场强元素(HFS)Zr和Ga,亏损Ba、Sr、Eu等;岩石中的石英包裹体均一温度为750～950℃,具有高温岩浆浅成被动就位的特征.岩石富SiO2、K2O、Al2O3,δ18O值为5.1‰～10.3‰,属正常略偏低δ18O值花岗岩类;ISr值较高、εNd值较低,暗示了其源区物质来源主要与古老下地壳变质基底物质有关,并涉及到一定程度的壳幔岩浆混合作用.综合这些特征,首次提出伊春地区晚三叠世-早侏罗世正长-碱长花岗岩属于铝质A2型花岗岩,这说明此后该地区进入了古亚洲洋最终闭合之后大陆碰撞后跨塌、伸展动力学体制的构造背景. |
| 关 键 词： | 正长-碱长花岗岩 铝质A型花岗岩 晚三叠世-早侏罗世 造山后 伊春地区 |
Geochemistry of Late Triassic-Early Jurassic aluminous A-type syenogranite alkali feldspar granite in Yichun area, Heilongjiang Province and its tectonic implications |
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| HAN Zhen-zhe,ZHAO Hai-ling,WANG Pan-xi,YANG Xiao,NIU Yan-hong and ZHAO Han-dong.Geochemistry of Late Triassic-Early Jurassic aluminous A-type syenogranite alkali feldspar granite in Yichun area, Heilongjiang Province and its tectonic implications[J].Acta Petrologica Et Mineralogica,2009,28(2):97-108. | |
| Authors: | HAN Zhen-zhe ZHAO Hai-ling WANG Pan-xi YANG Xiao NIU Yan-hong and ZHAO Han-dong |
| Institution: | State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Beijing 100083, China; Key Laboratory of Lithosphere Tectonics and Lithoprobing Technology of Ministry of Education, China University of Geosciences, Beijing 100083, China; Qiqihar Branch, Heilongjiang Institute of Geological Investigation and Research, Qiqihar 161005, China;State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Beijing 100083, China; Key Laboratory of Lithosphere Tectonics and Lithoprobing Technology of Ministry of Education, China University of Geosciences, Beijing 100083, China;;State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Beijing 100083, China;;State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Beijing 100083, China;;Qiqihar Branch, Heilongjiang Institute of Geological Investigation and Research, Qiqihar 161005, China;State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Beijing 100083, China; Key Laboratory of Lithosphere Tectonics and Lithoprobing Technology of Ministry of Education, China University of Geosciences, Beijing 100083, China; Qiqihar Branch, Heilongjiang Institute of Geological Investigation and Research, Qiqihar 161005, China |
| Abstract: | |
| Keywords: | syenogranites-alkali feldspar granites A-type granites Late Triassic-Early Jurassic post-orogenic Yichun area |
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