Lithological, chronological and geochemical characteristics of Tianyu Cu-Ni deposit: Constraints on source and genesis of mafic-ultramafic intrusions in eastern Xinjiang.
文献类型：期刊论文
| 作者 | Tang DongMei1,2; Qin KeZhang1; Sun He1,2; Su BenXun1,2; Xiao QingHua1,2; Cheng SongLin3; Li Jun3 |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2009-04-01 |
| 卷号 | 25期号:4页码:817-831 |
| 关键词 | Tianyu Cu-Ni deposit Geochemistry Zircon LA-ICP-MS U-Pb date Lu-Hf isotope Crust contamination Eastern Xinjiang |
| ISSN号 | 1000-0569 |
| 文献子类 | Article |
| 英文摘要 | Tianyu mafic-ultramafic intrusions are located in the south of the Shaquanzi deep-seated fault. Shaquanzi fault is the boundary between the Central Tianshan Massif and Jueluotage tectonic belt. It covers an area of 0.056 km(2) in shape of dyke pitched to the north. The intrusions consist of gabbro, pyroxenite, olivine pyroxenite, pyroxene peridotite and peridotite. Olivine pyroxenite, pyroxene peridotite and peridotite are the main host rocks for the Cu-Ni ores. Major-element contents of Tianyu complex show tholeiitic evolution trend and m/f values range from 1.44 to 3.61 with 2.25 on average, falling into the range of ferrous-ultramafic rocks. Similar LREE-rich pattern and negative or no Eu anomaly indicate that Tianyu complex have the same magma source. Trace elements show LILE-rich and HFSE-depleted pattern. The depletion of Nb, Ta implies the contamination of continental material. Nb/Hf, Ce/Pb, Nb/U, La/Sm, Th/Nb values suggest the contamination of upper crust during upward of magma. Zircon LA-ICP-MS U-Pb dates yield 290.2 +/- 3.4Ma which is consistent with the age of other mafic-ultramafic complex in East Tianshan. Uniform Lu/Hf values and the ((176)Hf/(177)Hf)(i) reveal that the characteristics of source are simple. Th, ((176)Hf/(177)Hf)(i) are in the range of 0.282625 similar to 0.282770 with corresponding epsilon(Hf)(t) values of 1.10 similar to 6.06. Lu-Hf single-stage modal ages (t(DMI)) vary from 674.0 to 884.7Ma, mean age(799Ma) is older than U-Pb age. These characteristics indicate that the parental magma derived from depleted mantle or had been contaminated by crustal material. These geochemical and chronological characteristics also constrain the southern subduction of Paleo-Asia Ocean in Paleozoic. |
| WOS关键词 | ULTRAHIGH-PRESSURE ECLOGITE ; U-PB AGE ; LU-HF ; ISOTOPIC COMPOSITIONS ; NW CHINA ; PETROGENESIS ; EVOLUTION ; GEOCHRONOLOGY ; TIANSHAN ; ZIRCONS |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000265945600008 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/70716]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Tang DongMei |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China 3.Xinjiang Bur Geol & Mineral Resources, Hami 839000, Peoples R China |
| 推荐引用方式 GB/T 7714 | Tang DongMei,Qin KeZhang,Sun He,et al. Lithological, chronological and geochemical characteristics of Tianyu Cu-Ni deposit: Constraints on source and genesis of mafic-ultramafic intrusions in eastern Xinjiang.[J]. ACTA PETROLOGICA SINICA,2009,25(4):817-831. |
| APA | Tang DongMei.,Qin KeZhang.,Sun He.,Su BenXun.,Xiao QingHua.,...&Li Jun.(2009).Lithological, chronological and geochemical characteristics of Tianyu Cu-Ni deposit: Constraints on source and genesis of mafic-ultramafic intrusions in eastern Xinjiang..ACTA PETROLOGICA SINICA,25(4),817-831. |
| MLA | Tang DongMei,et al."Lithological, chronological and geochemical characteristics of Tianyu Cu-Ni deposit: Constraints on source and genesis of mafic-ultramafic intrusions in eastern Xinjiang.".ACTA PETROLOGICA SINICA 25.4(2009):817-831. |
入库方式： OAI收割
来源：地质与地球物理研究所
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