| 东秦岭火山岩的地球化学特征和成因模式 |
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| 引用本文： | 何瑞芳,段联合.东秦岭火山岩的地球化学特征和成因模式[J].地球科学与环境学报,1993(2). |
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| 作者姓名： | 何瑞芳 段联合 |
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| 作者单位： | 西安地质学院 710054
(何瑞芳)，西安地质学院 710054(段联合) |
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| 摘 要： | 熊耳群为玄武粗安岩-英安流纹岩组合,大红口组为粗面岩组合,属B类的过渡型拉斑玄武岩浆系列,具以太华群为岩浆房的壳幔混染型成因;秦岭群和宽坪群为变拉斑玄武岩建造,属A类拉斑玄武岩浆系列,具幔源型成因;二郎坪群和丹凤群属细碧岩-石英角斑岩建造,C类石英角斑岩浆系列与A类拉斑玄武岩浆系列共存,具壳幔双层混合型成因。
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| 关 键 词： | 火山岩建造 岩浆系列 成因模式 东秦岭 |
GEOCHEMICAL CHARACTERISTICS AND GENETIC MODELS OF VOLCANIC ROCKS IN THE EAST QINLING |
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| He Ruifang Duan Lianhe.GEOCHEMICAL CHARACTERISTICS AND GENETIC MODELS OF VOLCANIC ROCKS IN THE EAST QINLING[J].Journal of Earth Sciences and Environment,1993(2). |
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| Authors: | He Ruifang Duan Lianhe |
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| Institution: | Xi an College of Geology |
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| Abstract: | Xionger Group is characterized by the bimodal basaltic trachyandesite-rhyodacite association. The Da-hongkou formatin belongs to the trachyte association. Both of them are thought of as the trasitional tholeiitic magma series (series B),and are given a crust-mantle contaminating genetic model within the lower crustal magma chambers of the Archean Tainhua Group. The metavolcanic rocks of the Qinling group and the Kuan-ping group belong to metatholeiite formations . They are characterized by the mafic tholeiitic magma series (series A)with the mantle-derived magma genetic model. The metavolcanic rocks of the Erlangping group and the Danfeng group can be referred to as the spilite-quartz-keratophyre formations. They have both the mafic tholeiitic magma series (series A)and the quartz-keratophyre magma series (series C)with the crustmantle two-layer mixing genetic model. |
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| Keywords: | Volcanic formation magma series genetic models the East Qinling Mountains |
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