Geochronology and geochemistry of the Kekesai intrusion in western Tianshan, NW China and its geological implications
文献类型：期刊论文
| 作者 | Zhu MingTian1; Wu Guang2,3; Xie HongJing4; Liu Jun2; Zhang LianChang1 |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2011-10-01 |
| 卷号 | 27期号:10页码:3041-3054 |
| 关键词 | Zircon U-Pb age Geochemistry Adakitic rock Thickened crust Kekesai intrusion Western Tianshan |
| ISSN号 | 1000-0569 |
| 文献子类 | Article |
| 英文摘要 | Kekesai intrusion, located in the north of the Sayram block of western Tianshan, Xinjiang, is composed of monzogranite porphyry of high-K calc-alkalinc series. This paper presents the new major and trace element geochemistry and Sr-Nd isotopic compositions of the monzogranite porphyry. The contents of SiO2 (70. 56% similar to 71. 46%), Al2O3 (15. 27% similar to 16. 01%), MgO (0. 77% similar to 1. 02%), Sr (363 x 10(-6) similar to 577 x 10(-6)), Y (7. 40 x 10(-6) similar to 8. 50 x 10(-6)), Yb (0. 60 x 10(-6) similar to 0. 72 x 10(-6)) together with the strongly fractionated REE patterns ((La/Yb)(N) : 14. 99 similar to 23. 69) and weak negative-, or positive-Eu anomalies (delta Eu: 0. 88 similar to 1. 21) indicate that the monzogranite porphyry shows characteristics of adakitic rock. The rocks have low I-Sr(0. 705078 - 0. 705572), positive epsilon(Nd)(t) values (2. 82 similar to 3. 56) and young two-stage Nd-model age (774 similar to 835Ma). The LA-MC-ICP-MS zircon U-Ph age of the monzogranite porphyry indicates that the intrusion was emplaced at the end of the Late Carboniferous (301.9 +/- 1. 8Ma). Element and isotope data demonstrate that the Kekesai intrusion was produced by the partial melting of juvenile Neoproterozoic lower crust and associated with initial stage of post-collision process. |
| WOS关键词 | CARBONIFEROUS VOLCANIC-ROCKS ; TRONDHJEMITE-GRANODIORITE TTG ; SLAB-DERIVED MELTS ; TECTONIC EVOLUTION ; CONTINENTAL-CRUST ; NORTHERN XINJIANG ; OROGENIC BELT ; CENTRAL-ASIA ; NORTHWESTERN CHINA ; AWULALE MOUNTAIN |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000296655800020 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/74070]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Zhu MingTian |
| 作者单位 | 1.Chinese Acad Sci, Key Lab Mineral Resources, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Chinese Acad Geol Sci, Inst Mineral Resources, Beijing 100037, Peoples R China 3.Lingbao Jinyuan Min Ltd Liabil Co, Lingbao 472500, Henan Province, Peoples R China 4.Chinese Acad Sci, Key Lab Mineral & Metallogeny, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhu MingTian,Wu Guang,Xie HongJing,et al. Geochronology and geochemistry of the Kekesai intrusion in western Tianshan, NW China and its geological implications[J]. ACTA PETROLOGICA SINICA,2011,27(10):3041-3054. |
| APA | Zhu MingTian,Wu Guang,Xie HongJing,Liu Jun,&Zhang LianChang.(2011).Geochronology and geochemistry of the Kekesai intrusion in western Tianshan, NW China and its geological implications.ACTA PETROLOGICA SINICA,27(10),3041-3054. |
| MLA | Zhu MingTian,et al."Geochronology and geochemistry of the Kekesai intrusion in western Tianshan, NW China and its geological implications".ACTA PETROLOGICA SINICA 27.10(2011):3041-3054. |
入库方式： OAI收割
来源：地质与地球物理研究所
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