| 东太平洋海盆海山玄武岩特征 |
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| 引用本文： | 康长生,梁德华,廖志良.东太平洋海盆海山玄武岩特征[J].海洋地质与第四纪地质,1997(2). |
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| 作者姓名： | 康长生 梁德华 廖志良 |
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| 作者单位： | 地质矿产部广州海洋地质调查局研究所 |
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| 摘 要： | 东太平洋海山玄武岩属于大洋岛屿拉斑玄武岩，主要由橄榄拉斑玄武岩、石英拉斑玄武岩和橄榄玄武岩组成，具有拉斑玄武岩系列和过渡玄武岩系列。岩石具有基质为拉斑玄武结构或间隐结构的斑状结构和气孔构造，斑晶主要由拉长石和普通辉石组成，基质除拉长石和玻璃质外，还有少量普通辉石和磁铁矿等，岩石化学成分中Ａｌ２Ｏ３、Ｎａ２Ｏ、Ｋ２Ｏ含量偏高。玄武岩中稀土元素分配型式基本相同，曲线较平坦，稀土分馏不明显，具Ｃｅ、Ｅｕ负异常，反映岩石具有共同的成因，属晚白垩世以来的产物
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| 关 键 词： | 东太平洋海盆 海山玄武岩 |
CHARACTERISTICS OF SEAMOUNT BASALTS FROM THE EAST PACIFIC BASIN |
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| Kang Changsheng,Liang Dehua,Liao Zhiliang.CHARACTERISTICS OF SEAMOUNT BASALTS FROM THE EAST PACIFIC BASIN[J].Marine Geology & Quaternary Geology,1997(2). |
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| Authors: | Kang Changsheng Liang Dehua Liao Zhiliang |
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| Abstract: | In the light of synthetic analysis and studies of seamount basalts from the East Pacific Basin in the aspects of lithology,petrochemistry,minerals,microelement geochemistry and isotope chronostratigraphy etc., we come to a conclusion that the seamount basalts with Hawaii basalt belong to ocean island tholeiite,there are calc alkaline series and alkali calcic series which include olivine tholeiite,quartz tholeiite and olivine basalt,and they formed since Cretaceous. |
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| Keywords: | East Pacific Basin seamount basalts |
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