Age and tectonic setting of Triassic basic volcanic rocks in southern Da Hinggan Range
文献类型：期刊论文
| 作者 | Zhang LianChang; Ying JiFeng; Chen ZhiGuang; Wu HuaYing; Wang Fei; Zhou XinHua |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2008-04-01 |
| 卷号 | 24期号:4页码:911-920 |
| 关键词 | tholeiite triassic volcanics lithogeochemistry extension of post-orogeny southern Da Hinggan Range |
| ISSN号 | 1000-0569 |
| 文献子类 | Article |
| 英文摘要 | Using zircon U-Pb LA-ICPMS and matrix Ar-Ar dating for volcanies, it is indicated that some Triassic (214 similar to 250 Ma) basic volcanics were distributed in southern Da Hinggan Range. The analysis of major and trace elements show that the volcanics are characterized by low K. 0 contents (0.16% similar to 1.70%), low MgO contents (2.89% similar to 10.30%), enrichment of LREE, no pronounced Eu anomaly (delta Eu = 0.73-1.09) and weak negative Nb and Ta anomalies. These geochemical characteristics are similar to those of continental tholeiite. Discrimination diagrams of various trace elements indicate that these volcanic rocks were formed in post-orogen stage. Isotopic geochemistries show that values of epsilon(Nd)(t) and (Sr-87/Sr-86)(i) of the volcanic range from 0.4 to 6.9 and from 0.7032 to 0.7049, respectively. The ratios of Pb-206/Pb-204, Pb-207/Pb-204 and Pb-208/Pb-204 vary from 18.22 to 18.59, 15.55 to 15.61 and 38.18 to 38.52, respectively. These geochemistries show that the basaltic magam was formed in partial melting of lithoshperic mantle. Based on above mentioned characteristics, combined with the regional researching results, we suggest that the southern Da Hinggan Range was very likely to an extensional environment of post-orogen during the Triassic. |
| WOS关键词 | INNER-MONGOLIA ; CHINA ; PROVINCE ; GEOCHRONOLOGY ; PETROGENESIS ; EXTENSION ; MOUNTAINS ; BELT |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000256696700029 |
| 出版者 | SCIENCE CHINA PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/69170]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Zhang LianChang |
| 作者单位 | Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang LianChang,Ying JiFeng,Chen ZhiGuang,et al. Age and tectonic setting of Triassic basic volcanic rocks in southern Da Hinggan Range[J]. ACTA PETROLOGICA SINICA,2008,24(4):911-920. |
| APA | Zhang LianChang,Ying JiFeng,Chen ZhiGuang,Wu HuaYing,Wang Fei,&Zhou XinHua.(2008).Age and tectonic setting of Triassic basic volcanic rocks in southern Da Hinggan Range.ACTA PETROLOGICA SINICA,24(4),911-920. |
| MLA | Zhang LianChang,et al."Age and tectonic setting of Triassic basic volcanic rocks in southern Da Hinggan Range".ACTA PETROLOGICA SINICA 24.4(2008):911-920. |
入库方式： OAI收割
来源：地质与地球物理研究所
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