| 青海沱沱河地区乌石峰蛇绿混杂岩的地球化学特征及其形成环境 |
| |
| 引用本文： | 袁建国,杨立朋,高立湧.青海沱沱河地区乌石峰蛇绿混杂岩的地球化学特征及其形成环境[J].化工矿产地质,2012(1):15-25. |
| |
| 作者姓名： | 袁建国 杨立朋 高立湧 |
| |
| 作者单位： | 1. 中国地质大学北京地球科学与资源学院,北京,10083
2. 中化地质矿山总局地质研究院,河北涿州,072750 |
| |
| 摘 要： | 青海沱沱河地区乌石峰蛇绿混杂岩位于西金乌兰-风火山逆冲带中。通过对其岩石学和全岩地球化学研究,探讨了蛇绿混杂岩的构造类型及其形成环境。晚古生代乌石峰蛇绿构造混杂岩的岩石组合以及蛇绿混杂岩中玄武岩类岩石(主要为辉绿岩及辉长岩)的地球化学特征对构造环境的指示表明:其地球化学特征与MORB相似,超基性岩和基性岩形成于大洋板内环境与洋中脊环境的复合构造环境中。是古特提斯洋洋盆残片,体现了古特提斯洋壳的闭合位置,是古特提斯洋在早二叠世末闭合过程中形成的增生楔的一部分。
|
| 关 键 词： | 沱沱河 乌石峰蛇绿混杂岩 岩石特征 地球化学 洋中脊 |
GEOCHEMISTRY AND FORMATION ENVIRONMENT OF THE WUSHIFENG HILL OPHIOLITE MELANGE BELT IN THE REGION OF TUOTUOHE,QINGHAI |
| |
| Yuan Jianguo,Yang Lipeng,Gao Li.GEOCHEMISTRY AND FORMATION ENVIRONMENT OF THE WUSHIFENG HILL OPHIOLITE MELANGE BELT IN THE REGION OF TUOTUOHE,QINGHAI[J].Geology of Chemical Minerals,2012(1):15-25. |
| |
| Authors: | Yuan Jianguo Yang Lipeng Gao Li |
| |
| Institution: | yong2 1.School of the Earth Science and Sources,China University of Geoscience,Beijing,100083,China 2.Institute of Geology,Administration of Mining Geology,China Ministry of Chemical Industry,Zhuozhou,Hebei,072750,China |
| |
| Abstract: | Wushifeng hill ophiolite melange belt in Tuotuohe,Qinghai is located in the Xijinwulan lake-Fenghuo mountain thrust belt.This study puts stress on petrologyand geochemistry of the ophiolite melange belt,discusses the constructed type and the formation environment.The geochemistry of the basalt rocks(diabase and gabbro)and rock associations in late paleozoic ophiolite belt study suggests that the belt is similar in geochemistry to MORB,which were formed in complex tectonic environment of oceanic intraplate and Mid-ocean ridge.It’s the pieces of paleo-tethys ocean basin which were the part of accretionary wedgere flecting the closed position of paleo-tethys ocean. |
| |
| Keywords: | Tuotuohe Wushifeng ophiolite melange belt petrology chemical characteristics MORB |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
