| 北澜沧江缝合带白济汛堆晶岩的初步研究 |
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| 引用本文： | 魏君奇, 王晓地. 北澜沧江缝合带白济汛堆晶岩的初步研究[J]. 华南地质, 2006, (3): 37-40. doi: 10.3969/j.issn.1007-3701.2006.03.006 |
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| 作者姓名： | 魏君奇 王晓地 |
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| 作者单位： | 宜昌地质矿产研究所,湖北,宜昌,443003;; 宜昌地质矿产研究所,湖北,宜昌,443003 |
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| 摘 要： | 北澜沧江缝合带白济汛堆晶岩由吉岔镁铁-超镁铁岩和俄咱辉长岩组成.吉岔镁铁-超镁铁岩由蛇纹岩-辉长岩-斜长花岗岩以构造岩片的形式组合在一起,形成于澜沧江洋盆扩张期,是澜沧江洋的洋壳残片,属蛇绿岩的组成单元.俄咱辉长岩则不属于澜沧江蛇绿岩带的组成单元,岩体具就地分异现象,边缘相中见辉长岩-闪长岩-斜长花岗岩堆晶系列,是澜沧江洋盆闭合、陆-陆碰撞后(燕山晚期),在板内拉张环境下侵位的基性岩体.
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| 关 键 词： | 堆晶岩 白济汛 北澜沧江缝合带 |
| 文章编号： | 1007-3701（2006）03-0037-04 |
| 收稿时间： | 2006-03-16 |
| 修稿时间： | 2006-03-16 |
A Study on the Baijixun Cumulate in the North Lancangjiang Zone |
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| WEI Jun-qi, WANG Xiao-di. A Study on the Baijixun Cumulate in the North Lancangjiang Zone[J]. South China Geology, 2006, (3): 37-40. doi: 10.3969/j.issn.1007-3701.2006.03.006 |
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| Authors: | WEI Jun-qi WANG Xiao-di |
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| Abstract: | The Baijixun cumulate is composed of the Jicha mafic-ultramafic complexes and the Eza grabbro in the north Lancangjiang zone. The Jicha mafic-ultramafic complex is a member of ophiolite, which formed in the period of ocean basin extension. It contains serpentine-grabbro-plagiogranite tectonic slice from the Lancangjing Ocean crust relic. The Eza grabbro does not belong to the Lancangjing ophiolite and formed in the intra-continent extension environment after ocean basin close and continent-continent collision. It shows grabbro-diorite-plagiogranite series in border facies because of crystallization differentiation in origin spot. |
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| Keywords: | cumulate Baijixun North Lancangjiang Zone |
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