| 山西左云火山岩剖面的系统K-Ar年代测定 |
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| 引用本文：李大明,李齐.2003.山西左云火山岩剖面的系统K-Ar年代测定[J].地球学报,24(6):559-562. |
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| 基金项目:国家自然科学基金项目(40273029) |
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| 中文摘要:左云火山岩面积超过 15 0 0km2 ,但是一直是年代学研究的空白地区 ,本文利用K Ar年代学方法对山西 内蒙古交界的新生代火山岩进行了较系统的年代测定 ,岩浆活动时代为中新世 ,火山岩剖面顶部年龄为 15 .13± 0 .0 8Ma ,底部年龄为2 3.90± 0 .33Ma,因此该火山岩应与大同、集宁地区的火山岩一样 ,同属于广义的中新世“汉诺坝玄武岩”。 |
| 中文关键词:年代学 中新世 火山岩 汉诺坝玄武岩 |
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| Serial K-Ar Dating along the Volcanic Section in Zuoyun,Shanxi Province |
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| Abstract:The Zuoyun volcanic rocks located on the boundary between Inner Mongolia and Shanxi Province has an area of over 1 500 km 2,but had no isotopic age record in the past. A serial K-Ar dating was made by the authors along the volcanic rock section in this area. The age at the top of the section is 15.13±0.08 Ma,and that at the bottom is 23.90±0.33 Ma.According to the dating results in combination with the petrographic researches, it is held that the volcanic rocks in Zouyun area belong to the Miocene “General Hannuoba basalt”. |
| keywords:geochronology Miocene volcanic rock Hannuoba basalt |
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