| 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。 |
| 关键词: 改则 古昌蛇绿岩 斜长花岗岩 西藏 |
| DOI： |
| 附件 |
| 投稿时间：2006-01-13修订日期：2006-12-24 |
| 基金项目: |
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| Plagiogranite in the Goicang ophiolites in Xizang |
| ZHANG Kuan-zhong, CHEN Yu-lu |
| (Regional Geological Survey Party, Sichuan Institute of Geological Survey, Chengdu 610213, Sichuan, China) |
| 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 oceanicridge 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. |
| Key words: Gerze Goicang ophiolite plagiogranite Xizang |
