| 内蒙古白女羊盘地区白女羊盘组火山岩地层层序及时代 |
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| 引用本文： | 封书凯.内蒙古白女羊盘地区白女羊盘组火山岩地层层序及时代[J].内蒙古地质,1998(4). |
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| 作者姓名： | 封书凯 |
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| 作者单位： | 内蒙古第一区域地质研究院 |
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| 摘 要： | 分布于内蒙古白女羊盘地区的白女羊盘组为一套陆相火山喷发—沉积地层，其下部为玄武岩，中部为安山岩、粗面岩，上部为流纹岩及其火山碎屑岩，出露厚度大于４２６米。根据其下伏沉积地层中化石和孢粉资料及火山岩同位素测年资料，白女羊盘组火山岩的时代为早白垩世，其层位相当于下白垩统固阳组的上部层位。白女羊盘组火山岩的碱度与酸度变化较大，玄武岩与安山岩属碱性系列，流纹岩属钙碱性系列。
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| 关 键 词： | 白女羊盘组 火山岩 层序 时代 |
Time and Stratigraphic Sequence of Bainuyangpan Formation, Bainuyanypan Area,Inner Mongolia |
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| Feng Shukai.Time and Stratigraphic Sequence of Bainuyangpan Formation, Bainuyanypan Area,Inner Mongolia[J].Geology of Inner Mongolia,1998(4). |
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| Authors: | Feng Shukai |
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| Institution: | The First Regional Geological Institute of Inner Mongolia |
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| Abstract: | Bainuyanpan formation is a range of land facies volcanic eruption sediment stratigraphic,with a thickness of up to 426m,which are lower basalt,middle andesite and trachyte,and upper rhyolite and pyroclastic rock in Bainuyangpan area,Inner mongolia.According to data with fossils and sporopollens in underlying sediment stratigraphic and volcanic isotopic age determination,the volcanic is a lower Cretaceous equivalent of upper of Gouyang formation of Early Cretaceous.The volcanic have great changes in alkalinity-acidity.The basalt and the andesite is alkali and the rhyolite is calc-alkaline series. |
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| Keywords: | Bainuyangpan formation volcanic rock stratigraphic sequence time |
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