| 内蒙古莫力达瓦旗哈达阳绿泥石白云母构造片岩LA-ICP-MS锆石U-Pb年龄及其地质意义 |
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| 引用本文： | 那福超,付俊彧,汪 岩,杨 帆,张广宇,刘英才,康 庄.内蒙古莫力达瓦旗哈达阳绿泥石白云母构造片岩LA-ICP-MS锆石U-Pb年龄及其地质意义[J].地质通报,2014,33(9):1326-1332. |
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| 作者姓名： | 那福超 付俊彧 汪 岩 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，辽宁 沈阳 110034 |
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| 基金项目： | 中国地质调查局项目(编号:12120114019601) |
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| 摘 要： | 嫩江—黑河构造带地处松嫩地块与兴安地块的结合部位,一直以来是业内学者关注的焦点。在构造带内内蒙古莫力达瓦旗哈达阳一带野外实地调研过程中,发现一套变质变形程度与周围地质体差异很大的地层。岩石组合为绿泥石白云母构造片岩、二云母微晶片岩、黝帘白云糜棱片岩等。采用LA-ICP-MS技术获得的绿泥石白云母构造片岩中锆石U-Pb年龄为413.9Ma±2.7Ma。通过分析区域地质演化历史及不同时代地质体特征,认为沿红山梁—哈达阳—依克特一带存在一条构造混杂堆积岩带,这套强变形岩石应为构造混杂岩带的一部分,其原岩形成时代为早泥盆世,后期构造定位应与嫩江—黑河构造带最后于早石炭世末拼合作用有关。
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| 关 键 词： | 哈达阳 白云母构造片岩 LA-ICP-MS锆石U-Pb年龄 嫩江—黑河构造带 早泥盆世 |
LA-ICP-MS zircon U-Pb age of the chlorite-muscovite tectonic schist in Hadayang, Morin Dawa Banner, Inner Mongolia, and its tectonic significance |
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| NA Fu-chao,FU Jun-yu,WANG Yan,YANG Fan,ZHANG Guang-yu,LIU Ying-cai,KANG Zhuang.LA-ICP-MS zircon U-Pb age of the chlorite-muscovite tectonic schist in Hadayang, Morin Dawa Banner, Inner Mongolia, and its tectonic significance[J].Geologcal Bulletin OF China,2014,33(9):1326-1332. |
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| Authors: | NA Fu-chao FU Jun-yu WANG Yan YANG Fan ZHANG Guang-yu LIU Ying-cai KANG Zhuang |
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| Institution: | Shenyang Center of Geological Survey, CGS, Shenyang 110034, Liaoning, China |
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| Abstract: | Located at the junction of Songnen massif with Xingan massif, the Nenjiang-Heihe tectonic belt has long been the focus of geologist's attention. During the field work in Nenjiang area, the authors found a new suite of strata whose deformation and metamorphism are greatly different from those of surrounding geological bodies. Rocks exhibit such combinations as chlorite-muscovite tectonic schist, biotite-muscovite microlite schist and zoisite-muscovite mylonite schist. Geochronological research was conducted on chlorite-muscovite tectonic schist, which yielded a zircon U-Pb(LA-ICP-MS) age of 413.9Ma±2.7Ma. Based on the analysis of regional geological evolution history and geological characteristics of different ages, the authors hold that there is an tectonic mélange belt along Hongshanliang-Hadayang-Yikette area. This suite of strongly deformed rocks should be part of the tectonic melange belt, and the original rock was formed in the Early Devonian. The late structural location was related to the collage effect of Nenjiang-Heihe tectonic belt which occurred in late Early Carboniferous period. |
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| Keywords: | Hadayang chlorite-muscovite tectonic schist LA-ICP-MS zircon U-Pb age Nenjiang-Heihe tectonic belt Early Devonian |
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