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| 滇西北金沙江带中基性火山岩的地球化学特征 | |
| 引用本文： | 谢静,朱炳泉,常向阳.滇西北金沙江带中基性火山岩的地球化学特征[J].矿物岩石地球化学通报,2005,24(4):299-308. |
| 作者姓名： | 谢静 朱炳泉 常向阳 |
| 作者单位： | 1. 中国科学院,地质与地球物理研究所,北京100029;中国科学院,研究生院,北京,100039 2. 中国科学院,广州地球化学研究所,广州,510640 3. 中国科学院,广州地球化学研究所,广州,510640;广州大学,环境科学与工程学院,广州,510405 |
| 基金项目： | 中国科学院知识创新工程重要方向资助项目（KZXZ-SW-125）;国家重点基础研究发展规划资助项目（G1999043215）;国家自然科学基金资助项目（40073001）. |
| 摘 要： | 对滇西北金沙江带出露的东竹林火山岩、辉长岩和奔子栏、维西攀天阁、石鼓地区中基性火山岩进行了系统的主量元素、微量元素、Sr-Nd同位素的地球化学研究,并对东竹林辉长岩进行了Sm-Nd等时线年龄的测定,以探讨金沙江地区的大地构造背景及其演化.研究表明,金沙江带出露的从泥盆纪到三叠纪的火山岩形成于弧后盆地、初始裂谷和岛弧等各种不同的构造环境.研究为金沙江带构造演化的多次裂开,多次俯冲消减的多岛洋模式提供了新的证据. |
| 关 键 词： | 金沙江带 火山岩 地球化学 滇西北 |
| 文章编号： | 1007-2802（2005）04-0299-10 |
| 收稿时间： | 2005-07-09 |
| 修稿时间： | 2005-08-15 |
Geochemical Characteristics of Basic-intermediate Volcanic Rocks from Jinshajiang Belt in Northwestern Yunnan, China |
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| XIE Jing,ZHU Bing-quan,CHANG Xiang-yang.Geochemical Characteristics of Basic-intermediate Volcanic Rocks from Jinshajiang Belt in Northwestern Yunnan, China[J].Bulletin of Mineralogy Petrology and Geochemistry,2005,24(4):299-308. | |
| Authors: | XIE Jing ZHU Bing-quan CHANG Xiang-yang |
| Abstract: | In order to discuss the tectonic setting and evolution of J inshajiang area, systematic geochemical studies of major elements, trace elements and Sr-Nd isotopes are performed for basic-intermediate volcanic rocks from Dongzulin,Benzilan,Pantiange and Shigu, and gabbros from Dongzhuiin in Jinshajiang belt, northwestern Yunnan. Age of gabbroic rocks from the Dongzhulin area was determined by Sm-Nd isochronal method. It indicated that the Devonian to Triassic volcanic rocks outcropped in Jinshajiang belt were formed in different tectonic environments, such as back-arc basin,initial rift,island arc, and so on. Our studies provide new evidences for the archipelagic evolutionary model with multi-rift and multi-subduction of Jinshajiang belt. |
| Keywords: | Jingshajiang belt volcanic rock geochemistry northwestern Yunnan |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |
