| 内蒙古阿巴嘎旗的梅勒图组 |
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| 引用本文： | 张玉清.内蒙古阿巴嘎旗的梅勒图组[J].地层学杂志,2012(1):71-76. |
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| 作者姓名： | 张玉清 |
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| 作者单位： | 内蒙古自治区地质调查院 |
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| 基金项目： | 国土资源大调查项目,中国地质调查局二连地区五幅1/25万区域地质调查项目(200413000012)资助 |
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| 摘 要： | 内蒙古阿巴嘎旗北部的梅勒图组呈北东向展布,向北东延入蒙古,区域地质调查归于二连打布苏组一岩段(K2e1),经剖面测制、采样分析等综合研究,该地层应属于梅勒图组,岩性组合为安山玄武岩、玄武岩、玄武安山岩、辉石安山岩等。辉石安山岩全岩K-Ar年龄为122～136Ma,为早白垩世岩浆喷溢活动的产物。该火山岩形成于伸展构造环境,物质来源于上地幔。
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| 关 键 词： | 岩石地层 K-Ar年龄 伸展构造环境 梅勒图组 早白垩世 阿巴嘎旗 内蒙古 |
THE MEILETU FORMATION IN THE ABAGAQI AREA,INNER MONGOLIA |
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| ZHANG Yu-qing.THE MEILETU FORMATION IN THE ABAGAQI AREA,INNER MONGOLIA[J].Journal of Stratigraphy,2012(1):71-76. |
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| Authors: | ZHANG Yu-qing |
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| Institution: | ZHANG Yu-qing Geological Survey Institute of Inner Mongolia,Huhhot 010020 |
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| Abstract: | he Meiletu Formation in northern area of Abagaqi,Inner Mongolia,is NE placement distribution,it ranges to Mongolia along the NE placement.The regional geological survey has assigned it to Erliandabushu Formation one Paragraph(K2e1),by means of section measure and acquisition sample.Studies show that the formation sould be assign to Meiletu Formation.rock association is andesite-basalt,basalt,basalt-andesite and pyroxene andesite and so on.K-Ar isotopic age dating of pyroxene andesite whole rock is 122-136 Ma,implying a product of Early Cretaceous magmatic movement.The volcanic rock has formed in an extensional environment,which imply that they may be the mixture upper mantle. |
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| Keywords: | lithostratigraphy K-Ar isotopic age dating extensional tectonics circumstance Meiletu Formation Early Cretaceous Abagaqi Inner Mongolia |
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