Tectonic setting and mantle source characteristics of Jiugequan basalts, North Qilian: Contraints from trace elements and Nd-isotopes.
文献类型：期刊论文
| 作者 | Qian, Q; Zhang, Q; Sun, XM |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2001-07-01 |
| 卷号 | 17期号:3页码:385-394 |
| 关键词 | North Qilian mountains basalt trace element Nd-isotopes seamount |
| ISSN号 | 1000-0569 |
| 文献子类 | Article |
| 英文摘要 | Basalts from Jiugequan ophiolite, North Qilian mountains, are of MORB-type, and are composed of N-MORBs in the lower section and E-MORBs in the upper section. Most of the basalts show negative Nb anomaly. From the bottom to the top, Th, Nb, LREE and Zr contents and (La/Yb)(N), (La/Sm)(N), Ce/Zr, Zr/Y, Th/La, Th/Yb ratios of the basalts are gradually increased, companioned with continuous descreasing of Y, Yb, Lu and Sc contents, Zr/Nb and La/Nb ratios, as well as epsilon (Nd)(t) In addition, the samples show significant correlations between incompatible element ratios and epsilon (Nd)(t), that is, incompatible elements and isotopes are coupled. We interpret these correlatios as mixing trends of N-MORB source and OIB source resulting from melting of a heterogeneous mantle domain. Trace elemental and Nd-isotopic characteristics indicate that the Jiugequan ophiolite was from a seamount in a back-are basin, and the geochemical variations records the motive geological processes that the seamount being gradually developed and moved away from the spreading ridge. It is proposed that many ophiolites were actually from seamounts. |
| WOS关键词 | MID-ATLANTIC RIDGE ; EAST PACIFIC RISE ; GEOCHEMICAL VARIATIONS ; VOLCANIC-ROCKS ; SEAMOUNTS ; OPHIOLITE ; HETEROGENEITY ; PETROGENESIS ; EVOLUTION ; ORIGIN |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000170244300006 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/76635]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Qian, Q |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Jilin Univ, Dept Geol, Changchun 130022, Peoples R China |
| 推荐引用方式 GB/T 7714 | Qian, Q,Zhang, Q,Sun, XM. Tectonic setting and mantle source characteristics of Jiugequan basalts, North Qilian: Contraints from trace elements and Nd-isotopes.[J]. ACTA PETROLOGICA SINICA,2001,17(3):385-394. |
| APA | Qian, Q,Zhang, Q,&Sun, XM.(2001).Tectonic setting and mantle source characteristics of Jiugequan basalts, North Qilian: Contraints from trace elements and Nd-isotopes..ACTA PETROLOGICA SINICA,17(3),385-394. |
| MLA | Qian, Q,et al."Tectonic setting and mantle source characteristics of Jiugequan basalts, North Qilian: Contraints from trace elements and Nd-isotopes.".ACTA PETROLOGICA SINICA 17.3(2001):385-394. |
入库方式： OAI收割
来源：地质与地球物理研究所
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