|
|||||
|
|
| 湘南汝城盆地火山岩岩石地球化学及其成因意义 | |
| 引用本文： | 贾大成,胡瑞忠,卢焱,丘学林.湘南汝城盆地火山岩岩石地球化学及其成因意义[J].矿物岩石,2003,23(2):49-54. |
| 作者姓名： | 贾大成 胡瑞忠 卢焱 丘学林 |
| 作者单位： | 1. 吉林大学地球探测科学与技术学院,吉林,长春,130062;中国科学院地球化学研究所,矿床地球化学开放研究实验室,贵州,贵阳,550002 2. 中国科学院地球化学研究所,矿床地球化学开放研究实验室,贵州,贵阳,550002 3. 吉林大学地球探测科学与技术学院,吉林,长春,130062 4. 中国科学院南海海洋研究所,广东,广州,510301 |
| 基金项目： | 中国科学院知识创新工程项目 (KZCX2-10 2，KZCX2-2 0 9)，中国科学院边缘海地质与古环境开放实验室基金项目 ( BYH01A0 2 )，中国科学院矿床地球化学开放研究实验室基金项目 (2000)联合资助。 |
| 摘 要： | 汝城盆地基性火山岩系由辉绿岩、玄武岩和玄武质火山碎屑岩组成，属于低钾拉斑玄武岩系。基性火山岩系具有同一岩浆源区。岩石微量元素出现弱的LILE富集和Ta，Nb，Ti的亏损。强不相容元素比值反映岩浆源区明显偏离原始地幔组分，具有富集型异常地幔岩浆源区特征。岩浆源区同时受到地壳物质混染和来自先前消减残留板片流体或熔体交代的双重改造作用。在陆内拉张构造条件下富集型异常地幔岩浆源区的部分熔融是制约汝城盆地基性火山岩形成的主要因素。 |
| 关 键 词： | 汝城盆地 基性火山岩 岩石地球化学 岩浆源区 成因 微量元素 |
| 文章编号： | 1001-6872(2003)02-0049-06 |
| 修稿时间： | 2002年12月15 |
THE GEOCHEMISTRY OF THE VOLCANIC ROCKS AND ITS ORIGIN SIGNIFICANCE IN RUCHENG BASIN,SOUTHERN HUNAN |
|
| JIA Da-cheng ,HU Rui-zhong ,LU Yan ,QIU Xue-lin .College of Geo-exploration Science and Technology,Jilin University,Changchun ,China, .Open Laboratory of Ore Deposit Geochemistry.THE GEOCHEMISTRY OF THE VOLCANIC ROCKS AND ITS ORIGIN SIGNIFICANCE IN RUCHENG BASIN,SOUTHERN HUNAN[J].Journal of Mineralogy and Petrology,2003,23(2):49-54. | |
| Authors: | JIA Da-cheng HU Rui-zhong LU Yan QIU Xue-lin College of Geo-exploration Science and Technology Jilin University Changchun China Open Laboratory of Ore Deposit Geochemistry |
| Institution: | JIA Da-cheng 1,2,HU Rui-zhong 2,LU Yan 1,QIU Xue-lin 3 1.College of Geo-exploration Science and Technology,Jilin University,Changchun 130026,China, 2.Open Laboratory of Ore Deposit Geochemistry,Institute of Geochemistry,Chinese Academy of Science,Guiyang 550002,China, 3.South China Sea Institute of Oceanology,Chinese Academy of Science,Guangzhou 510301,China |
| Abstract: | The basic volcanic rock of low potassic tholeiite series in Rucheng basin was composed of diabase, basalt and basaltic pyroclastic rocks.The volcanic rock series has same magma source. The trace elements showed enrichment of large-ion lithophile elements (LILE) and depletion of Ta?Nb?Ti. The ratios of incompatible elements reflected that the magma source departed from the composition of primary mantle and had the characteristics of the enriched metasomatic mantle. The magma source was changed by the assimilation of crustal matter and by the fluid of relict oceanic plate from pre-subduction. The partial melting of the enriched metasomatic mantle under tectonic condition of the continental extension was the main controlling factor for the formation of volcanic rocks. |
| Keywords: | basic volcanic rock geochemistry magma source origin Rucheng basin |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |