| 渤海湾盆地第三系火山岩及其成因 |
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| 引用本文： | 刘中云,肖尚斌,姜在兴. 渤海湾盆地第三系火山岩及其成因[J]. 中国石油大学学报(自然科学版), 2001, 25(1) |
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| 作者姓名： | 刘中云 肖尚斌 姜在兴 |
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| 作者单位： | 1. 胜利石油管理局临盘采油厂,
2. 石油大学石油资源科学系, |
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| 基金项目： | 中国石油天然气集团公司“九五”科技攻关项目!(970 2 0 6 -0 2 -0 1-18) |
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| 摘 要： | 对渤海湾盆地第三系火山岩及其成因进行的研究表明 ,渤海湾盆地火山岩主要为玄武岩 ,其次是辉绿岩 ,局部分布有少量安山岩、玄武安山岩、粗面岩、火山碎屑岩 ;辽河坳陷基本为高钾玄武岩 ;黄骅坳陷火山岩与济阳坳陷相似 ,既有高钾玄武岩 ,也有中钾玄武岩。全盆地范围内玄武岩基本上为碱性玄武岩 ,少量为亚碱性玄武岩。所有喷出相的火山岩 (包括玄武岩和火山碎屑岩 )中铕 (Eu)异常均不明显 ,δEu近于 1,因此岩石形成过程中未曾发生铕的亏损或富集事件。这说明原始玄武岩浆生成后 ,在整个上升和结晶过程中未受到地壳物质的强烈混染 ,各期玄武岩均是幔源原生岩浆固结的产物。而侵入相的辉绿岩中铕的含量则有明显的正异常 ,这可能与岩浆能量较弱、上升速度较慢及发生分离结晶作用有关。盆地内玄武岩是具有突出特征的板内玄武岩
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| 关 键 词： | 渤海湾盆地 第三系 火山岩 玄武岩 构造环境 成因 |
VOLCANIC ROCKS OF BOHAI BAY BASIN IN TERTIARY AND THEIR GENESIS |
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| LIU Zhong-yun,XIAO Shang-bin,JIANG Zai-xing. VOLCANIC ROCKS OF BOHAI BAY BASIN IN TERTIARY AND THEIR GENESIS[J]. Journal of China University of Petroleum (Edition of Natural Sciences), 2001, 25(1) |
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| Authors: | LIU Zhong-yun XIAO Shang-bin JIANG Zai-xing |
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| Abstract: | Lithology of volcanic rocks, series and evolvement of magma are studied based on thin section and petrochemical analysis of Bohai Bay basin in Tertiary. Basalts are the primary rocks in Bohai Bay basin. There are almost basalts with high potassium type in Liaohe depression, and those with high to medium types in Huanghua and Jiyang depressions. The most basalts belong to alkali basalts, and the rest are sub|alkali basalts Magmas of all extrusive rocks came from the mattle, and they were not hybridised. Diapirism of asthenosphere and regional stress field result in the appearance of Bohai Bay basin. |
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| Keywords: | Bohai Bay basin Tirtiary volcanic rocks basalt tectonic setting genesis |
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