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| 贝加尔裂谷带通京盆地新生代火山岩石学与地球化学特征及其构造意义 | |
| 引用本文： | 李益龙,周汉文,Лабацкая,严溶,曾广策.贝加尔裂谷带通京盆地新生代火山岩石学与地球化学特征及其构造意义[J].矿物岩石,2006,26(3):56-63. |
| 作者姓名： | 李益龙 周汉文 Лабацкая 严溶 曾广策 |
| 作者单位： | 1. 中国地质大学地球科学学院,湖北,武汉,430074;中国地质大学地质过程与矿产资源国家重点实验室,湖北,武汉,430074 2. 俄罗斯伊尔库茨克国立工业大学珠宝学院 3. 中国地质大学地球科学学院,湖北,武汉,430074 |
| 基金项目： | 国家地质学理科基地人才培养基金 |
| 摘 要： | 位于贝加尔裂谷带西南端通京盆地的尚加泰火山玄武岩由高拉长石—中长石、贵橄榄石、次透辉石、火山玻璃组成,据对S iO2与全碱(N a2O K2O)的关系判断,均为碱性橄榄玄武岩,微量元素、稀土元素分布型式与板内碱性玄武岩一致,推测原始岩浆来源于上地幔距地表200 km~250 km深度处,在距地表约40 km处即莫霍面附近开始冷却结晶,该火山活动区可能成因于异常地幔凸起中的物质-能量流沿着断裂在通京盆地内的上升。 |
| 关 键 词： | 碱性玄武岩 异常地幔 通京盆地 贝加尔裂谷 |
| 文章编号： | 1001-6872（2006）03-0056-08 |
| 收稿时间： | 2006-05-07 |
| 修稿时间： | 2006-08-13 |
PETROLOGICAL AND GEOCHEMICAL CHARACTERISTICS AND TECTONIC IMPLICATION OF CENOZOIC BASALTS IN TUNKA BASIN IN BAIKAL RIFT BELT |
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| LI Yi-long.PETROLOGICAL AND GEOCHEMICAL CHARACTERISTICS AND TECTONIC IMPLICATION OF CENOZOIC BASALTS IN TUNKA BASIN IN BAIKAL RIFT BELT[J].Journal of Mineralogy and Petrology,2006,26(3):56-63. | |
| Authors: | LI Yi-long |
| Institution: | 1. Faculty of Earth Science,China University of Geosciences,Wuhan 430074,China; 2. State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences,Wuhan 430074,China; 3. Gemological Institute ,Irkutsk Polytechnic Institution ,Russia |
| Abstract: | Sunjardy volcano in Tunka basin in the Southwestern of Baikal rift belt is composed of chrysolite,labradorstein-andesine,salite and volcanic glasses.The basalts belong to alkalic series revealed by the composition of w(SiO_2) vs w(Na_2O K_2O).Trace elements and REEs distribution patterns are the same as WPB.It is concluded that the primitive magmas comes from upper mantle which is about 200 km~250 km beneath the earth surface,and the porphyritic crystals might be crystallized at 40 km beneath the Earth surface.It is considered that the volcanic activity may be related to the uplifted flow of matter-energy in the ataxinomic mantle. |
| Keywords: | alkalic basalts ataxinomic mantle Tunka basin Baikal rift |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |