Characteristics of the mantle source region of sodium lamprophyres and petrogenetic tectonic setting in northeastern Hunan, China
文献类型：期刊论文
| 作者 | Jia, DC ; Hu, RZ ; Lu, Y ; Xie, GQ ; Qiu, XL |
| 刊名 | SCIENCE IN CHINA SERIES D-EARTH SCIENCES
 |
| 出版日期 | 2004 |
| 卷号 | 47期号:6页码:559-569 |
| 关键词 | sodium lamprophyre mantle source region tectonic setting genesis northeastern Hunan |
| ISSN号 | 1006-9313 |
| 通讯作者 | jiadacheng@sina.com |
| 中文摘要 | A set of unique sodium lamprophyres is developed in the Cenozoic intracontinental extensional zone of northeastern Hunan. These lamprophyres are significantly different in major and trace elements and Sr, Nd isotopes from ordinary potassic lamprophyres. The rocks are characterized as being enriched in Na2O and high in TiO2 and weakly enriched in Nb, Ta, Nd and LREE with no negative Eu anomaly. The trace elements and Sr, Nd isotopic compositions are typical of the mantle source region of oceanic island basalts (OIB). The average initial Sr-87/Sr-86 ratio is 0.705332, and the average initial Nd-143/Nd-144 ratio is 0.512650, with epsilon(Nd)(t) being +3.5- +3.9, marking a mantle source region of unique sodium lamprophyres. The lamprophyres were formed by metasomatism of the primitive mantle at the bottom of lithosphere by volatile-containing fluids/melts from the asthenosphere. The measured Rb-Sr isochron age of sodium lamprophyre is 136.61 Ma, representing a period in which the tectonic setting changed from compressive to extensional. Sodium lamprophyres were formed in a mantle plume tectonic setting characterized by mantle upwelling from the asthenosphere within the continent. Asthenospheric mantle upwelling is the principal geodynamic factor leading to the formation of sodium lamprophyres and constraining the Yanshanian intracontinental extensional activity in northeastern Hunan, China. |
| 学科主题 | Geosciences, Multidisciplinary |
| 收录类别 | SCI |
| 原文出处 | SCIENCE CHINA PRESS |
| WOS记录号 | WOS:000223147200010 |
| 公开日期 | 2011-07-03 |
| 源URL | [http://ir.scsio.ac.cn/handle/344004/4796]  |
| 专题 | 南海海洋研究所_中科院边缘海地质重点实验室 |
| 推荐引用方式 GB/T 7714 | Jia, DC,Hu, RZ,Lu, Y,et al. Characteristics of the mantle source region of sodium lamprophyres and petrogenetic tectonic setting in northeastern Hunan, China[J]. SCIENCE IN CHINA SERIES D-EARTH SCIENCES,2004,47(6):559-569. |
| APA | Jia, DC,Hu, RZ,Lu, Y,Xie, GQ,&Qiu, XL.(2004).Characteristics of the mantle source region of sodium lamprophyres and petrogenetic tectonic setting in northeastern Hunan, China.SCIENCE IN CHINA SERIES D-EARTH SCIENCES,47(6),559-569. |
| MLA | Jia, DC,et al."Characteristics of the mantle source region of sodium lamprophyres and petrogenetic tectonic setting in northeastern Hunan, China".SCIENCE IN CHINA SERIES D-EARTH SCIENCES 47.6(2004):559-569. |
入库方式： OAI收割
来源：南海海洋研究所
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