| 龙首山几个镁铁-超镁铁质岩体比较 |
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| 引用本文： | 焦建刚,闫海卿,刘瑞平. 龙首山几个镁铁-超镁铁质岩体比较[J]. 地质与勘探, 2006, 42(5): 60-65 |
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| 作者姓名： | 焦建刚 闫海卿 刘瑞平 |
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| 作者单位： | 长安大学地球科学与国土资源学院,西安,710054;西安地质矿产研究所,西安,710054 |
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| 基金项目： | 中国地质调查局科研项目，长安大学校科研和校改项目 |
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| 摘 要： | 文章选择龙首山隆起区金川、塔马子沟、毛草泉、小口子、藏布台几个镁铁-超镁铁质岩体进行地质、地球化学比较研究,发现岩体普遍具有橄榄石堆晶特征,中段金川岩体以二辉橄榄岩为主要特征,外围岩体以单辉橄榄岩为特征.地球化学数据显示,这些镁铁-超镁铁质岩体处于相同的岩石系列,源区具有相似性,岩体含矿差异主要源自岩浆演化.结合地质综合场模型,提出金川外围岩体在龙首山隆起区,沿构造带东西长约80～100km范围存在金川深部岩浆房响应的产物.
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| 关 键 词： | 镁铁-超镁铁质岩体 地球化学 地质综合场 龙首山 |
| 文章编号： | 0495-5331（2006）05-0060-06 |
| 收稿时间： | 2005-10-13 |
| 修稿时间： | 2006-01-23 |
COMPARISON OF SEVERAL MAFIC-ULTRAMAFIC INTRUSIONS IN THE LONGSHOUSHAN MOUNTAIN |
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| JIAO Jian-gang,YAN Hai-qing,LIU Rui-ping. COMPARISON OF SEVERAL MAFIC-ULTRAMAFIC INTRUSIONS IN THE LONGSHOUSHAN MOUNTAIN[J]. Geology and Prospecting, 2006, 42(5): 60-65 |
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| Authors: | JIAO Jian-gang YAN Hai-qing LIU Rui-ping |
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| Abstract: | Several mafic-ultramafic intrusions in Longshoushan Mountain are selected to compare their geology and geochemistry.The results show that accumulation of olivine is common in the intrusions.Intrusions in the middle parts of Longshoushan Mountain are characteristic with lherzolite,the periphery of the intrusions are characteristic with clinopyroxene.Geochemical data prove that all intrusions belong to the same petrochemical series,the intrusions' differentiation mainly come from magmatic evolution.Combining with geology comprehensive field theory,it is pointed that periphery of the Jinchuan intrusive is located in the dome of Longshoushan Mountain,and there exists a responding production of Jinchuan deep magma chamber with 80 to 100km long in the E-W trending structure zone. |
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| Keywords: | mafic- ultramafic intrusion geochemistry geology comprehensive field Longshoushan Mountain |
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