| 古昌蛇绿岩中的斜长花岗岩特征 |
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| 引用本文： | 张宽忠,陈玉禄.古昌蛇绿岩中的斜长花岗岩特征[J].沉积与特提斯地质,2007,27(1):32-37. |
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| 作者姓名： | 张宽忠 陈玉禄 |
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| 作者单位： | 四川省地质调查院,区域地质调查所,四川,成都,610213 |
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| 摘 要： | 古昌蛇绿岩中首次发现斜长花岗岩。斜长花岗岩的地质特征和岩石学、岩石化学、地球化学特征反映出异常洋脊花岗岩的属性,岩浆源自地幔,与古昌蛇绿岩中的变质橄榄岩、基性岩墙、基性熔岩的岩浆同源,是基性—超基性岩浆分异的残余,应属古昌蛇绿岩中的浅色岩组分,是蛇绿岩的端元岩石。
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| 关 键 词： | 改则 古昌蛇绿岩 斜长花岗岩 西藏 |
| 文章编号： | 1009-3850（2007）01-0032-06 |
| 收稿时间： | 2006-01-13 |
| 修稿时间： | 2006-01-132006-12-24 |
Plagiogranite in the Goicang ophiolites in Xizang |
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| ZHANG Kuan-zhong,CHEN Yu-lu.Plagiogranite in the Goicang ophiolites in Xizang[J].Sedimentary Geology and Tethyan Geology,2007,27(1):32-37. |
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| Authors: | ZHANG Kuan-zhong CHEN Yu-lu |
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| Institution: | Regional Geological Survey Party, Sichuan Institute of Geological Survey, Chengdu 610213, Sichuan, China |
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| Abstract: | Plagiogranite was recognized for the first time in the Goicang ophiolites in Xizang.The examination of geology,petrology,lithochemistry and geochemistry has disclosed that the plagiogranite may be allocated to the abnormal oceanic-ridge granites.The mantle-derived magmas are the same as those of metamorphic peridotite,basic dykes and basic lava.The plagiogranite as the relicts from the basic-ultrabasic magmatic differentiation should be assigned to the light-coloured rocks and member rocks in the Goicang ophiolites. |
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| Keywords: | Gerze Goicang ophiolite plagiogranite Xizang |
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