| 水泉沟杂岩体的地质学和岩石学研究 |
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| 引用本文： | 张招崇,陈洪新.水泉沟杂岩体的地质学和岩石学研究[J].地质与资源,1997,6(2):81-92. |
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| 作者姓名： | 张招崇 陈洪新 |
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| 作者单位： | 1. 中国地质科学院地质研究所;2. 中国地质科学院地质力学研究所 |
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| 摘 要： | 水泉沟岩体为岩浆成因,岩体的侵位深度2~3km,侵位时代为印支期,划分为4种岩石组合.水泉沟岩体是一个钾质-高钾质的钙碱性、弱碱性和碱性岩石共存的杂岩体.岩石化学成分变异图解证明岩浆存在两种演化趋势,一是酸性演化趋势:辉石闪长岩→角闪二长岩(包括二长岩)→石英碱长正长岩→碱长花岗岩;二是碱性演化趋势:正长岩→霓辉正长岩→碱长正长岩.同时也探讨了这两种演化趋势的内在机理.
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| 关 键 词： | 碱性-弱碱性杂岩体 岩石学 岩浆演化 冀北 水泉沟 |
| 收稿时间： | 1996-10-03 |
GEOLOGY AND PETROLOGY OF SHUIQUANGOU COMPLEX,NORTHERN HEBEI PROVINCE |
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| Zhang Zhaochong,Chen Hongxin.GEOLOGY AND PETROLOGY OF SHUIQUANGOU COMPLEX,NORTHERN HEBEI PROVINCE[J].Geology and Resources,1997,6(2):81-92. |
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| Authors: | Zhang Zhaochong Chen Hongxin |
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| Institution: | 1. Institute of Geology, CAGS;2. Institute of Geomechanics, CAGS |
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| Abstract: | Shuiquangou complex is of magmatic origin aged Indosinian epoch.The depth of the intrusive emplacement ranges 2～3km.Four associations and their types of rocks are newly devided.The petrochemical study on the whole complex proves that it is a potassic and high potassic complex consisting of calc alkaline,weakly alkaline and alkaline complex.The diagrams of their petrochemical variation show that the magma has two evolutionary trends:one is acid evolutionary trend(pyroxene diorite→amphibole monzonite→quartz alkali feldspar syenite→alkali feldspar granite),the other is alkaline evolutionary trend (syenite→aegirine augite syenite→alkali feldspar syenite).Its internal evolutionary mechanism is also probed simply. |
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| Keywords: | alkaline weakly alkaline complex petrology magmatic evloution Northern Hebei Shuiquangou |
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