Cretaceous-Paleogene alkaline magmatism in Tuyon basin, southwest Tianshan mountains: geochronology, petrology and geochemistry.
文献类型：期刊论文
| 作者 | Ji JianQing; Han Baofu; Zhu Meifei; Chu ZhuYin; Liu YuLin |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2006-05-01 |
| 卷号 | 22期号:5页码:1324-1340 |
| 关键词 | alkaline basalt mantle plume Cretaceous-Paleogene Tuyon |
| ISSN号 | 1000-0569 |
| 文献子类 | Article |
| 英文摘要 | There is a series of Cretaceous-Paleogene alkaline extrusives and intrusive units in Tuyon basin in southwestern Tienshan mountains, which include picrobasalt, basalt, basanite, tephrite, phonotephrite, and phonolite emplaced primarily in Cretaceous-Paleogene rocks. The rocks yield K-Ar ages between 120Ma and 50Ma. The characteristics of major and trace elements indicate that fractional crystallization play important influences on the magma evolutionary process. Two fractional crystallization processes result in the magma evolution from picrobasalt to phonolite. First, from picrobasalt to basalt, olivine, ilmenite and spinel are major fractionating minerals from the primary magma; the second, clinopyroxene and plagioclase as the major fractionating minerals from basalt, basanite, tephrite to phonotephrite. As the primary product of mantle melting, the picrobasalt indicates that a mantle plume or upwelling even occurred beneath the Tuyon basin. The phonolite is the last product of crystallization differentiation, indicating that alkaline igneous rocks, even alkaline granite and A-type granitic rocks, may be contributed by crystallization differentiation from picrobasalt. Major and trace element analysis combined with Sr, Nd and Pb isotopic data suggest that these rocks were derived from apparently ocean island basalts (OIB)-like mantle melts, which have characteristic close to asthenospheric PREMA, mixed with an enriched component in the continental mantle lithosphere or emplaced with some crustal contamination, though the REE partern and trace element spide diagrams obviously display that the mantle reservoir have been modified by metasomatic fluids. However, it is likely to conclude that the mantle reservoir is a paleozoic fresh lithospheric mantle based on Nd isotopic T-DM ranging from 250Ma to 600Ma. |
| WOS关键词 | PHANEROZOIC CRUSTAL GROWTH ; ND ISOTOPIC EVIDENCE ; A-TYPE GRANITES ; TRACE-ELEMENT ; NORTHEASTERN CHINA ; NW CHINA ; MANTLE ; XINJIANG ; ROCKS ; CONSTRAINTS |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000239220600021 |
| 出版者 | SCIENCE CHINA PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/66512]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Ji JianQing |
| 作者单位 | 1.Peking Univ, Lab Orogen Belts & Crustal Evolut, Beijing 100871, Peoples R China 2.Natl Taiwan Univ, Dept Geol, Taibei 116, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ji JianQing,Han Baofu,Zhu Meifei,et al. Cretaceous-Paleogene alkaline magmatism in Tuyon basin, southwest Tianshan mountains: geochronology, petrology and geochemistry.[J]. ACTA PETROLOGICA SINICA,2006,22(5):1324-1340. |
| APA | Ji JianQing,Han Baofu,Zhu Meifei,Chu ZhuYin,&Liu YuLin.(2006).Cretaceous-Paleogene alkaline magmatism in Tuyon basin, southwest Tianshan mountains: geochronology, petrology and geochemistry..ACTA PETROLOGICA SINICA,22(5),1324-1340. |
| MLA | Ji JianQing,et al."Cretaceous-Paleogene alkaline magmatism in Tuyon basin, southwest Tianshan mountains: geochronology, petrology and geochemistry.".ACTA PETROLOGICA SINICA 22.5(2006):1324-1340. |
入库方式： OAI收割
来源：地质与地球物理研究所
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