| 吉林省辽吉台块中生代火山岩地球化学特征及构造环境 |
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| 引用本文： | 隋振民.吉林省辽吉台块中生代火山岩地球化学特征及构造环境[J].吉林地质,1995,14(1):23-28. |
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| 作者姓名： | 隋振民 |
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| 作者单位： | 吉林省地质科学研究所 |
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| 摘 要： | 本区中生代火山岩可以分成偏碱性中性火山岩和酸性火山岩两类，二者之间表现出明显的成份间断，构成一个偏碱性中性－酸性双峰式岩系。偏碱性中性火山岩地球化学特征上与榄安粗岩相似，具有富碱（Ｋ２Ｏ＋Ｎａ２Ｏ），Ｋ２Ｏ／Ｎａ２Ｏ比值高以及富集大离子亲石元素（Ｒｂ，Ｓｒ，Ｂａ，Ｐ）等特征。本区火山岩形成大陆边缘拉张环境。
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| 关 键 词： | 中生代 火山岩 地球化学 构造环境 |
GEOCHEMICAL CHARACTERISTICS OF THE MESOZOIC LIAOJIPLATFORM BLICK IN JIL IN AND ITS TECTONIC SETTING |
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| Sui Zhenmin.GEOCHEMICAL CHARACTERISTICS OF THE MESOZOIC LIAOJIPLATFORM BLICK IN JIL IN AND ITS TECTONIC SETTING[J].Jilin Geology,1995,14(1):23-28. |
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| Authors: | Sui Zhenmin |
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| Abstract: | In this area,Mesozoic valcanic rocks can be divided the meta-alkaline intermediate andacid types.Between them,a composition hiatus is indicated, forming a meta-alkaline interme-diate-acid rock series with bi-peak model. The meta-alkaline intermediate volcanic rocks aresimilar to mugearites in geochemical characteristics ,having rich alkalinity(K_2O+Na_2O),highvalue K_2O/Na_2O,and higher concentration of big ion lithophile elements(Rb,Sr, Ba,P).The volcanic rocks were formed in continental margin extensional setting in this area. |
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| Keywords: | Mesozoic volcanic rocks Geochemistry Tectonic setting |
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