| 三岔口火成岩特征及其与软玉成矿的关系 |
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| 引用本文： | 周征宇,廖宗廷,马婷婷.三岔口火成岩特征及其与软玉成矿的关系[J].同济大学学报(自然科学版),2005,33(11):1532-1536. |
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| 作者姓名： | 周征宇 廖宗廷 马婷婷 |
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| 作者单位： | 同济大学,宝石学教育中心,上海,200092 |
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| 摘 要： | 青海省东昆仑三岔口软玉矿区内出露的火成岩主要为基性辉长岩,地球化学分析显示稀土总含量高,强不相容元素、轻稀土元素富集,岩浆分异演化显著.构造投影判别及稀土、微量元素分配型式均反映了消减带火山弧环境.研究认为岩体为软玉的形成提供了Si和OH-等矿源物质,结合实地勘查资料提出该地软玉是在地壳深部还原性环境及较高的温度下,岩浆热液交代碳酸盐岩形成含软玉质热液,最终充填碳酸盐岩岩石裂隙而成.
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| 关 键 词： | 地球化学 火成岩 软玉 |
| 文章编号： | 0253-374X（2005）11-1532-05 |
| 收稿时间： | 10 21 2004 12:00AM |
| 修稿时间： | 2004-10-21 |
Geochemical Characteristics of Igneous Rocks Occurred in Sanchakou East Kunlun and Its Contributions to Nephritization |
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| ZHOU Zheng-yu,LIAO Zong-ting,MA Ting-ting.Geochemical Characteristics of Igneous Rocks Occurred in Sanchakou East Kunlun and Its Contributions to Nephritization[J].Journal of Tongji University(Natural Science),2005,33(11):1532-1536. |
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| Authors: | ZHOU Zheng-yu LIAO Zong-ting MA Ting-ting |
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| Institution: | Gemology ducation Center, Tongji University, Shanghai 200092, China |
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| Abstract: | The igneous rocks occurring in Sanchakou East Kunlun are mainly made of basic gabbro,which shows high content of rare earth element(REE),and is enriched in incompatible elements and light rare earth element(LREE).The geochemical characteristics and REE paterns indicate volcanic arc tectonic sething.Through the analysis we come to the conclusion that under reducing circumstance and high temperature beneath the deep crustal,by the interaction between magmatic hydrothermal and the carbonate rocks,which provides Si and OH~-,there engender the hydrotherm whose composition is similar to the tremolite's,after filling into the cranny in the carbonate rocks,thus the nephrite is formed. |
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| Keywords: | geochemical igneous rocks nephrite |
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