Geochronology and geochemical characteristics of late mesozoic andesites in the Central Da-Hinggan Mountains, and its genesis
文献类型：期刊论文
| 作者 | Wu HuaYing1,3; Zhang LianChang1; Zhou XinHua2; Chen ZhiGuang1,3 |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2008-06-01 |
| 卷号 | 24期号:6页码:1339-1352 |
| 关键词 | andesites Early Cretaceous lithospheric mantle Central Da-Hinggan Mountains |
| ISSN号 | 1000-0569 |
| 文献子类 | Article |
| 英文摘要 | Ar-40/Ar-39 and zircon SHRIMP U-Pb dating indicate that andesites in the Central Da-Hinggan Mountains were mainly formed in two periods: 122 similar to 125Ma and 114 similar to 115Ma. That means the andesites were formed in two volcanic explosions in Early Cretaceous. Geochemical results indicate that the SiO2 are in 59.18% similar to 60.89%, Al2O3 and K2O + Na2O rang from 15.19% to 17.23% and 6.16% to 7.26%, and Mg-# changes from 33 to 54. The trace elements analysis demonstrate the total LREE enrichment with insignificantly negative Eu anomalies (delta Eu = 0.74 similar to 0.92) and intense fractionation between LREE and HREE. The primitive mantle-normalized spider diagrams are characterized by LILE enrichment and HFSE depletion, especially a significantly negative Nb-Ta anomalies. Isotopic geochemistries show that values of epsilon(Nd)(t) range from 0.97 to 3.17, and (Sr-87/Sr-86), from 0.70454 to 0.70483, respectively. The ratios of Pb-206/Pb-204, Pb-207/Pb-204 and Pb-208/Pb-204 vary from 18.17 to 18.28, 15.50 to 15.60, and 38.02 to 38.29, respectively. Based on our petrologic and geochemical study, the Early Cretaceous andesites in the Central Da-Hinggan Mountains are mainly calc-Alkaline, high K calc-Alkaline and shoshonitic, the andesitic magma originated from LILE- and fluid-rich mantle. Combining with previous studies, we suggest that the andesites were formed in the interplate-extending settings, and their formations were due to partially melting of the LILE- and fluid-rich lithospheric mantle, which was caused by upwelling of asthenospheric mantle and rising of ground temperature under extensional and weaken tectonic setting in northeastern China. |
| WOS关键词 | VOLCANIC-ROCKS ; CHINA ; EVOLUTION ; EXTENSION ; SUBDUCTION ; CALIFORNIA ; MAGMATISM ; MONGOLIA ; RANGE ; BASIN |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000259628800017 |
| 出版者 | SCIENCE CHINA PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/69414]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Wu HuaYing |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 3.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wu HuaYing,Zhang LianChang,Zhou XinHua,et al. Geochronology and geochemical characteristics of late mesozoic andesites in the Central Da-Hinggan Mountains, and its genesis[J]. ACTA PETROLOGICA SINICA,2008,24(6):1339-1352. |
| APA | Wu HuaYing,Zhang LianChang,Zhou XinHua,&Chen ZhiGuang.(2008).Geochronology and geochemical characteristics of late mesozoic andesites in the Central Da-Hinggan Mountains, and its genesis.ACTA PETROLOGICA SINICA,24(6),1339-1352. |
| MLA | Wu HuaYing,et al."Geochronology and geochemical characteristics of late mesozoic andesites in the Central Da-Hinggan Mountains, and its genesis".ACTA PETROLOGICA SINICA 24.6(2008):1339-1352. |
入库方式： OAI收割
来源：地质与地球物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。