| 丹巴地区前震旦纪岩浆岩地球化学研究 |
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| 引用本文： | 侯立玮,徐世进.丹巴地区前震旦纪岩浆岩地球化学研究[J].四川地质学报,1995(3). |
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| 作者姓名： | 侯立玮 徐世进 |
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| 作者单位： | 四川省地矿局科研所，南京大学地球科学系 |
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| 基金项目： | 地质矿产部“八五”攻关项目 |
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| 摘 要： | 丹巴地区前震旦纪结晶基底中具代表性的格宗和公差等花岗岩体，对其构造地质学、岩石学、岩石化学及岩石地球化学特征，以及同位素年代学特征的重点研究后，认为它们应主要为区内未出露的成熟度较低的中元古代（距今约１６００Ｍａ）的火山－沉积岩，于晚元古代（晋宁期）经深溶岩浆作用和变质作用改造重新组合固结而形成，并于喜马拉雅期遭受构造－热事件影响再度活化的壳源型花岗岩．是属扬子克拉通西缘晚元古代造山带的一个组成部分．
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| 关 键 词： | 岩石化学，地球化学，同位素地质年代学．岩，浆源区，前震旦纪构造演化 |
GEOCHEMICAL RESEARCH OF THE PRESINIAN MAGMATIC ROCK IN DANBA REGION |
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| Hou Liwei.GEOCHEMICAL RESEARCH OF THE PRESINIAN MAGMATIC ROCK IN DANBA REGION[J].Acta Geologica Sichuan,1995(3). |
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| Authors: | Hou Liwei |
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| Abstract: | Tectonic geological,petrological,petrochemical,geochemical and isotopic geochronological researches of Gezong and Gongchai granite rockbodies representative of the Presinian crystalline basement in Danba region indicate that most of them are crust-derived type granite which were formed from the Middle Proterozoic(160 Ma) volcanic-sedimentary rock with low maturity by anatectic magmatism and metamorphism in the Late Proterozoic(Jinning epoch) and were remobilized by tectonic thermal event in the Himalayan epoch.They are a part of the Late Proterozoic orogenic belt in the western margin of Yangtze craton. |
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| Keywords: | Petrochemistry geochemistry isotopic geochronology magma source region tectonic evolution in the Presinian |
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