| 内蒙古莫力达瓦旗哈达阳构造混杂岩地质特征及发现的意义 |
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| 引用本文： | 付俊,汪岩,那福超,杨帆,张广宇,刘英才,康庄.内蒙古莫力达瓦旗哈达阳构造混杂岩地质特征及发现的意义[J].地质与资源,2015,24(5):408-413. |
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| 作者姓名： | 付俊 汪岩 那福超 杨帆 张广宇 刘英才 康庄 |
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| 作者单位： | 中国地质调查局 沈阳地质调查中心(沈阳地质矿产研究所), 辽宁 沈阳 110034 |
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| 基金项目： | 中国地质调查局项目“嫩江黑河地区晚古生代拼合构造带研究”（编号1212011121085）和“东北基础地质调查成果集成与综合研究”（编号1212011220435）. |
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| 摘 要： | 哈达阳构造混杂岩出露于嫩江黑河构造带之中.根据区域地质背景及构造混杂岩中岩块地质及地球化学特征，划分了基质、原地岩块及异地岩块3部分.基质主要为绿帘黑云绿泥构造片岩.原地岩块主要有绿帘黑云绿泥构造片岩及可能来自海沟外缘缓坡的砾岩.异地岩块主要有角闪石岩、混染闪长岩及变酸性火山岩.角闪石岩及混染闪长岩岩石地球化学特征表明，其形成于与消减作用相关的边缘海扩张环境，而变酸性火山岩具有岛弧钙碱性火山岩特征.上述特征说明，哈达阳构造混杂岩与板块俯冲消减-碰撞作用相关.沿红山梁、哈达阳直达依克特一带出露的古生代地层彼此之间均为断块接触，认为在该沿线存在一条早石炭世末的构造混杂岩带.哈达阳构造混杂岩的发现为正确认识嫩江黑河构造带性质，正确分析构造带结构都具有重要意义.
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| 关 键 词： | 哈达阳 构造混杂岩 早石炭世末 内蒙古 |
| 收稿时间： | 2014-09-09 |
GEOLOGY OF THE HADAYANG TECTONIC MELANGE IN INNER MONGOLIA:Discovery significance |
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| FU Jun-yu,WANG yan,NA Fu-chao,YANG Fan,ZHANG Guang-yu,LIU Yin-cai,KANG Zhuang.GEOLOGY OF THE HADAYANG TECTONIC MELANGE IN INNER MONGOLIA:Discovery significance[J].Geology and Resources,2015,24(5):408-413. |
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| Authors: | FU Jun-yu WANG yan NA Fu-chao YANG Fan ZHANG Guang-yu LIU Yin-cai KANG Zhuang |
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| Institution: | Shenyang Institute of Geology and Mineral Resources, CGS, Shenyang 110034, China |
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| Abstract: | The Hadayang tectonic melange is outcropped in the Nenjiang-Heihe tectonic belt. According to its regional geological setting and rock geological and geochemical characteristics, the tectonic melange is divided into three parts:matrix, autochthonous blocks and allochthonous blocks. The matrix is dominated by epidote-biotite-chlorite tectonic schist. The autochthonous blocks are composed of epidote-chlorite-biotite tectonic schist and possible conglomerates from outer slope of trench. The allochthonous blocks are mainly hornblendite, hybrid diorite and meta-acidic volcanic rocks. The lithogeochemical characteristics show that the hornblendite and hybrid diorite were formed in a marginal ocean expansion environment related to subduction, while the meta-acidic volcanic rocks have the characteristics of island arc calc-alkaline volcanic rocks. The characteristics above indicate that the Hadayang tectonic melange is related to the subduction-collision of plates. Combined with the feature that glaucophane appears in the Early Carboniferous meta-acidic volcanic rocks of Hongsanliang area and Paleozoic strata outcropped along the Hongsanliang-Hadayang-Yikete area are fault contact relationship between each other, the authors conclude that there is a tectonic melange belt of late Early Carboniferous along this line. The discovery of Hadayang tectonic melange belt is of important significance for understanding the NenjiangHeihe tectonic belt and its structure. |
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| Keywords: | Hadayang tectonicmelange thelate Early Carboniferous Epoch Inner Mongolia |
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