Temperature of Prograde Metamorphism, Decompressional Partial Melting and Subsequent Melt Fractional Crystallization in the Weihai Migmatitic Gneisses, Sulu UHP Terrane: Constraints from Ti-in-Zircon Thermometer
文献类型：期刊论文
| 作者 | Xu, Haijin1,2; Ye, Kai3; Zhang, Junfeng1,2 |
| 刊名 | JOURNAL OF EARTH SCIENCE
 |
| 出版日期 | 2012-12-01 |
| 卷号 | 23期号:6页码:813-827 |
| 关键词 | Ti-in-zircon thermometer prograde metamorphism decompressional partial melting fractional crystallization migmatitic gneiss Sulu UHP metamorphic terrane |
| ISSN号 | 1674-487X |
| DOI | 10.1007/s12583-012-0303-0 |
| 文献子类 | Article |
| 英文摘要 | In order to constrain temperature during subduction and subsequent exhumation of felsic continental crust, we carried out a Ti-in-zircon thermometer coupled with zircon internal structure and U-Pb age on migmatitic gneisses from the Weihai (sic) region in the Sulu (sic) ultra-high pressure (UHP) metamorphic terrane, eastern China. The Weihai migmatitic gneisses are composed of intercalated compositional layers of melanosome and plagioclase (Pl)-rich leucosome and K-feldspar (Kfs)-rich pegmatite veins. Four stages of zircon growth were recognized in the Weihai migmatitic gneisses. They successively recorded informations of protolith, prograde metamorphism, decompressional partial melting during early stage exhumation and subsequent fractional crystallization of primary melt during later stage cooling exhumation. The inherited cores in zircon from the melanosome and the Pl-rich leucosome suggest that the protolith of the migmatitic gneiss is Mid-Neoproterozoic (similar to 780 Ma) magmatic rock. Metamorphic zircons with concordant ages ranging from 243 to 256 Ma occur as overgrowth mantles on the protolith magmatic zircon cores. The estimated growth temperatures (625-717 degrees C) of the metamorphic zircons have a negative correlation with their ages, indicating a progressive metamorphism in HP eclogite-facies condition during subduction. Zircon recrystallized rims (228 +/- 2 Ma) in the Pl-rich leucosome layers provide the lower limit of the decompresssional partial melting time during exhumation. The ages from 228 +/- 2 to 219 +/- 2 Ma recorded in the Pl-rich leucosome and the Kfs-rich pegmatite vein, respectively, suggest the duration of the fractional crystallization of primary melt during exhumation. The calculated growth temperatures of the zircon rims from the Pl-rich leucosome range from 858 to 739 degrees C, and the temperatures of new growth zircon grains (219 +/- 2 Ma) in Kfs-rich vein are between 769 and 529 degrees C. The estimated temperatures have a positive correlation with ages from the Pl-rich leucosome to the Kfs-rich pegmatite vein, strongly indicating that a process of fractional crystallization of the partial melt during exhumation. |
| WOS关键词 | ULTRAHIGH-PRESSURE TERRANE ; COESITE-BEARING ZIRCON ; SUBDUCTED CONTINENTAL-CRUST ; PB ISOTOPE SYSTEMS ; U-TH-PB ; EASTERN CHINA ; TRACE-ELEMENTS ; LU-HF ; RETROGRADE METAMORPHISM ; ICP-MS |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000316794900004 |
| 出版者 | CHINA UNIV GEOSCIENCES |
| 资助机构 | National Key Basic Research Program of China(2009CB825001) ; National Key Basic Research Program of China(2009CB825001) ; National Natural Science Foundation of China(40603002 ; National Natural Science Foundation of China(40603002 ; Fundamental Research Funds for the Central Universities, China University of Geosciences, Wuhan(CUG120121) ; Fundamental Research Funds for the Central Universities, China University of Geosciences, Wuhan(CUG120121) ; 41072046 ; 41072046 ; 41090371) ; 41090371) ; National Key Basic Research Program of China(2009CB825001) ; National Key Basic Research Program of China(2009CB825001) ; National Natural Science Foundation of China(40603002 ; National Natural Science Foundation of China(40603002 ; Fundamental Research Funds for the Central Universities, China University of Geosciences, Wuhan(CUG120121) ; Fundamental Research Funds for the Central Universities, China University of Geosciences, Wuhan(CUG120121) ; 41072046 ; 41072046 ; 41090371) ; 41090371) ; National Key Basic Research Program of China(2009CB825001) ; National Key Basic Research Program of China(2009CB825001) ; National Natural Science Foundation of China(40603002 ; National Natural Science Foundation of China(40603002 ; Fundamental Research Funds for the Central Universities, China University of Geosciences, Wuhan(CUG120121) ; Fundamental Research Funds for the Central Universities, China University of Geosciences, Wuhan(CUG120121) ; 41072046 ; 41072046 ; 41090371) ; 41090371) ; National Key Basic Research Program of China(2009CB825001) ; National Key Basic Research Program of China(2009CB825001) ; National Natural Science Foundation of China(40603002 ; National Natural Science Foundation of China(40603002 ; Fundamental Research Funds for the Central Universities, China University of Geosciences, Wuhan(CUG120121) ; Fundamental Research Funds for the Central Universities, China University of Geosciences, Wuhan(CUG120121) ; 41072046 ; 41072046 ; 41090371) ; 41090371) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/84530]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Xu, Haijin |
| 作者单位 | 1.China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Wuhan 430074, Peoples R China 2.China Univ Geosci, Fac Earth Sci, Wuhan 430074, Peoples R China 3.Chinese Acad Sci, State Key Lab Lithospher Evolut, Inst Geol & Geophys, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xu, Haijin,Ye, Kai,Zhang, Junfeng. Temperature of Prograde Metamorphism, Decompressional Partial Melting and Subsequent Melt Fractional Crystallization in the Weihai Migmatitic Gneisses, Sulu UHP Terrane: Constraints from Ti-in-Zircon Thermometer[J]. JOURNAL OF EARTH SCIENCE,2012,23(6):813-827. |
| APA | Xu, Haijin,Ye, Kai,&Zhang, Junfeng.(2012).Temperature of Prograde Metamorphism, Decompressional Partial Melting and Subsequent Melt Fractional Crystallization in the Weihai Migmatitic Gneisses, Sulu UHP Terrane: Constraints from Ti-in-Zircon Thermometer.JOURNAL OF EARTH SCIENCE,23(6),813-827. |
| MLA | Xu, Haijin,et al."Temperature of Prograde Metamorphism, Decompressional Partial Melting and Subsequent Melt Fractional Crystallization in the Weihai Migmatitic Gneisses, Sulu UHP Terrane: Constraints from Ti-in-Zircon Thermometer".JOURNAL OF EARTH SCIENCE 23.6(2012):813-827. |
入库方式： OAI收割
来源：地质与地球物理研究所
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