| 嫩江—黑河构造带收缩与伸展——源自晚古生代花岗岩类的地球化学证据 |
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| 引用本文： | 汪岩,付俊彧,杨帆,那福超,陈会军,张昱,杨晓平,张铁安.嫩江—黑河构造带收缩与伸展——源自晚古生代花岗岩类的地球化学证据[J].吉林大学学报(地球科学版),2015(2):374-388. |
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| 作者姓名： | 汪岩 付俊彧 杨帆 那福超 陈会军 张昱 杨晓平 张铁安 |
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| 作者单位： | 1. 沈阳地质矿产研究所/中国地质调查局沈阳地质调查中心,沈阳,110034;2. 黑龙江省区域地质调查所,哈尔滨,150080;3. 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： | 中国地质调查局地质大调查项目(12120114019601,1212011220435,12120114085601) |
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| 摘 要： | 黑龙江省嫩江至黑河一带发育大量的晚古生代花岗岩类岩石,同位素测年结果显示主要集中在3个时代:早石炭世、晚石炭世和早二叠世。岩石类型从花岗闪长岩—二长花岗岩—正长花岗岩—碱长花岗岩等均有不同出露,石炭纪部分岩石遭受韧性剪切变质变形作用改造形成花岗质糜棱岩。岩石整体具有高硅、富钾钠特征;稀土元素总量偏高,铕负异常明显;微量元素具明显的大离子亲石元素(LILE)K、Rb、Th富集和高场强元素(HFSE)Nb、P、Ti亏损特征。其中石炭纪花岗岩类地球化学特征显示陆缘弧及同碰撞花岗岩特点,二叠纪花岗岩则表现后造山花岗岩特点。二者反映了由碰撞造山向板内后造山阶段转变的构造环境特点,也反映了嫩江—黑河构造带汇聚拼合与伸展的活动史。
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| 关 键 词： | 花岗岩类 地球化学 晚古生代 嫩江 黑河构造带 |
Contraction and Extension in Nenjiang Heihe Tectonic Belt:Evidence from the Late Paleozoic Granitoid Geochemistry |
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| Wang Yan;Fu Junyu;Yang Fan;Na Fuchao;Chen Huijun;Zhang Yu;Yang Xiaoping;Zhang Tiean.Contraction and Extension in Nenjiang Heihe Tectonic Belt:Evidence from the Late Paleozoic Granitoid Geochemistry[J].Journal of Jilin Unviersity:Earth Science Edition,2015(2):374-388. |
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| Authors: | Wang Yan;Fu Junyu;Yang Fan;Na Fuchao;Chen Huijun;Zhang Yu;Yang Xiaoping;Zhang Tiean |
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| Institution: | Wang Yan;Fu Junyu;Yang Fan;Na Fuchao;Chen Huijun;Zhang Yu;Yang Xiaoping;Zhang Tiean;Shenyang Institute of Geology and Mineral Resources/Shenyang Center of Geological Survey,China Geological Survey;Heilongjiang Province Institute of Regional Geology Survey;Qiqihar Branch,Heilongjiang Research Insitute of Geological Survey; |
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| Abstract: | We present the geochemical characteristics of the Late Paleozoic granitoid in Heilongjiang Nenjiang Heihe through the study on the different types of granitoid.The isotopic dating results provide three time periods for these granitoids:Early Carboniferous,Late Carboniferous,and Early Permian.The granitoids are rich in silica,potassium,and sodium;and also the rare-earth elements relatively with significant negative Eu anomaly.The trace elements are typically rich in large ion lithophile element (LILE)K,Rb,Th,but poor with high-field-strength element (HFSE)Nb,P,Ti. The existence of granitic mylonite reflects its deformation and metamorphism through tuctile shear. Based on the above,the Carboniferous granitoid experienced a continental margi arc syn-collision;while the Permian granites deformed under a post-orogenesis These two reflects anenvironmental transition from a tectonic collision to an intraplate post-orgenesis ,and also the activity history of genesis, convergece,andextension of the Nenjiang Heihe tectonic belt. |
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| Keywords: | granitoid geochemistry Late Paleozoic Nenjiang Heihe tectonic belt |
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