| 西秦岭温泉花岗岩体岩石学特征及岩浆混合标志 |
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| 引用本文： | 李永军,李注苍,丁仨平,刘志武,李民贤,李金宝.西秦岭温泉花岗岩体岩石学特征及岩浆混合标志[J].地球科学与环境学报,2004,26(3):7-12. |
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| 作者姓名： | 李永军 李注苍 丁仨平 刘志武 李民贤 李金宝 |
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| 作者单位： | 长安大学,地球科学与国土资源学院,陕西,西安,710054 |
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| 基金项目： | 中国地质调查局地质调查项目(20001300010171) |
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| 摘 要： | 温泉花岗岩体由酸性端元的寄主岩石和暗色微细粒镁铁质包体群及基性岩墙群组成。无岩浆混合作用或岩浆混合作用较弱区段，寄主岩石以似斑状二长花岗岩为主．显示正常的花岗岩结构构造岩浆混合作用强烈区段。岩石的异常结构构造十分发育．矿物之间自形程度差异显著．常见包晶反应、包含结构、交代边、熔蚀边、交代蚕食的港湾状结构构造及交代缝合线、矿物镶边、斜长石异常环带和矿物残留等，多见指示岩浆混合的标志性矿物针状磷灰石。暗色微粒包体中多见寄主二长花岗岩中的捕掳晶。包体的形态、结构构造以及与寄主岩石强烈地成分交换等均是岩浆混合作用的标志。
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| 关 键 词： | 岩石学 岩浆混合标志 温泉花岗岩 西秦岭 |
| 文章编号： | 1672-6561(2004)03-0007-06 |
Petrology fetures and magma mingling marks of the Wenquan granite from western Qinling |
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| LI Yong-jun,LI Zhu-cang,DING San-ping,LIU Zhi-wu,LI Min-xian,LI Jin-bao.Petrology fetures and magma mingling marks of the Wenquan granite from western Qinling[J].Journal of Earth Sciences and Environment,2004,26(3):7-12. |
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| Authors: | LI Yong-jun LI Zhu-cang DING San-ping LIU Zhi-wu LI Min-xian LI Jin-bao |
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| Abstract: | Wenquan granite is composed of two end-member rocks, one is the host rock of the acid end-member, and the other is the microgranular mafic enclave. In the area without magma mingling or with weak magma mingling, the host rock is dominated by porphyaceous adamellite showing normal granite fabric. However, in the area with strong magma mingling, there are widespread abnormal fabrics, distinguished differences in the idiomophic-textures and the peritectic reaction, poililitic texture, metasomatism among the minerals, metasomatic border, embayment, rimmed structure, abnormal plagioclase zoning, relict fabric as well as the acicular apatite are very common. There are a lot of capture crystals in the rock of basic end-member. The shapes and fabric of the inclusion, as well as the strong exchange of the chemical compositions between the enclave and the host rock indicate the magma mingling. |
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| Keywords: | petrology features mafic microgranular enclave mingling of magma Wenquan granite western Qinling |
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