| 内蒙古格吉格音乌拉火山机构的岩石特征及时代 |
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| 引用本文： | 张维杰,李述靖.内蒙古格吉格音乌拉火山机构的岩石特征及时代[J].地质通报,1998(4). |
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| 作者姓名： | 张维杰 李述靖 |
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| 作者单位： | 中国地质大学 |
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| 摘 要： | 格吉格音乌拉火山机构主要由集块岩、角砾集块熔岩和碱性橄榄玄武岩组成。玄武岩中含有二辉橄榄岩包体，岩石属大陆内部碱性玄武岩系列。玄武岩层平覆于中新统通古尔组之上，是阿巴嘎玄武岩底部层位。玄武岩全岩钾—氩稀释法同位素年龄１２９９Ｍａ。综合分析认为：阿巴嘎玄武岩早期喷发活动最晚始于上新世。
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| 关 键 词： | 内蒙古锡林郭勒盟 阿巴嘎玄武岩 上新世 |
PETROLOGICAL CHARACTERISTICS AND AGE OF THE GEJIGEYIN UL VOLCANIC EDIFICE ON THE WESTERN MARGIN OF THE ABAG BASALT IN THE XILIN GOL LEAGUE, INNER MONGOLIA |
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| Zhang Weijie and Li Shujing.PETROLOGICAL CHARACTERISTICS AND AGE OF THE GEJIGEYIN UL VOLCANIC EDIFICE ON THE WESTERN MARGIN OF THE ABAG BASALT IN THE XILIN GOL LEAGUE, INNER MONGOLIA[J].Geologcal Bulletin OF China,1998(4). |
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| Authors: | Zhang Weijie and Li Shujing |
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| Abstract: | The Gejigeyin Ul volcanic edifice consists dominantly of agglomerate, breccia agglomerate lava and alkali olivine basalt. The basalt contains lherzolite xenoliths and belongs to the intracontinental alkali basalt series. It occurs as a horizontal bed overlying the Miocene Tunggalag Formation, so is the basal bed of the Abag basalt. The basalt has a whole rock K Ar dilution age of 12.99 Ma. An integrated analysis indicates that the early eruption of the Abag basalt continued till the Pliocene. |
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| Keywords: | Xilin Gol League Inner Mongolia Abag basalt Pliocene |
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