Petrogenesis of ca. 1.95 Ga meta-leucogranites from the Jining Complex in the Khondalite Belt, North China Craton: Water-fluxed melting of metasedimentary rocks
文献类型：期刊论文
| 作者 | Wang, Luo-Juan1,2; Guo, Jing-Hui2,3; Yin, Changqing1; Peng, Peng2,3 |
| 刊名 | PRECAMBRIAN RESEARCH
 |
| 出版日期 | 2017-12-01 |
| 卷号 | 303页码:355-371 |
| 关键词 | Leucogranite Crustal Anatexis Geochemistry Zircon U-pb-hf-o Isotopic Systems North China Craton |
| ISSN号 | 0301-9268 |
| DOI | 10.1016/j.precamres.2017.04.036 |
| 文献子类 | Article |
| 英文摘要 | Anatexis occurs in response to changing P-T-fluid conditions during orogenesis, is thus crucial for understanding the tectonic evolution of orogenic belts. Here we report an integrated petrological, geochemical, whole-rock oxygen isotopic and zircon U-Pb-Hf-O isotopic study of meta-leucogranites from the Jining Complex, North China Craton, to unravel its petrogenesis and constrain the tectonic evolution of the Paleoproterozoic Khondalite Belt. The meta-leucogranites are weakly peraluminous with homogeneous minimum-melt compositions, and are characterized by low Rb contents and Rb/Sr ratios, high Ba and Sr contents and Sr/Y ratios, and moderately fractionated REE patterns without obvious Eu anomalies. These trace-element characteristics differ from that of leucogranites derived from fluid-absent melting. Considering their low whole-rock Zr saturation temperatures (746-780 degrees C) and comparable compositions with experimentally generated melts produced by water-fluxed melting, we infer that the meta-leucogranites are low-temperature granites, and were generated by water-fluxed melting of metasedimentary rocks at 6-8 kbar. SIMS zircon U-Pb analyses suggest that the meta-leucogranites were emplaced at similar to 1.95 Ga or slightly earlier, and were subsequently metamorphosed and cut by a pegmatite dike at similar to 1.92 Ga. The abundant inherited zircons yield nearly concordant Pb-207/Pb-206 ages ranging from 2.24 to 1.98 Ga, which are consistent with the detrital zircon age spectra of the metasedimentary rocks from the Khondalite Belt. The Hf isotopic compositions of inherited and magmatic zircons (epsilon(Hf(t)) = +0.2 to +7.7) closely overlap with the time evolved epsilon(Hf) range of detrital zircons from metasediments in the Khondalite Belt. Different types of zircons (inherited, magmatic and metamorphic zircons) have similar delta O-18 values of 7.2-9.2 parts per thousand, which is lower than that of metamorphic zircons (10.0-13.6 parts per thousand) from surrounding metasediments. Thus, we propose that the meta-leucogranites were formed by water-fluxed melting of metasedimentary rocks from the Khondalite belt at similar to 1.95 Ga during the prograde upper amphibolite-facies metamorphism. (c) 2017 Elsevier B.V. All rights reserved. |
| WOS关键词 | U-PB ZIRCON ; ULTRAHIGH-TEMPERATURE METAMORPHISM ; HIGHER HIMALAYAN CRYSTALLINES ; PRESSURE PELITIC GRANULITES ; CHANNEL FLOW MODEL ; SOUTHERN TIBET ; WESTERN BLOCK ; ISOTOPIC COMPOSITIONS ; TECTONIC IMPLICATIONS ; CONTINENTAL-CRUST |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000423004300019 |
| 出版者 | ELSEVIER SCIENCE BV |
| 资助机构 | National Nature Science Foundation of China(41602197 ; National Nature Science Foundation of China(41602197 ; National Nature Science Foundation of China(41602197 ; National Nature Science Foundation of China(41602197 ; Chinese 1000 Young Talents Program ; Chinese 1000 Young Talents Program ; Chinese 1000 Young Talents Program ; Chinese 1000 Young Talents Program ; 41672190 ; 41672190 ; 41672190 ; 41672190 ; 41602184) ; 41602184) ; 41602184) ; 41602184) ; National Nature Science Foundation of China(41602197 ; National Nature Science Foundation of China(41602197 ; National Nature Science Foundation of China(41602197 ; National Nature Science Foundation of China(41602197 ; Chinese 1000 Young Talents Program ; Chinese 1000 Young Talents Program ; Chinese 1000 Young Talents Program ; Chinese 1000 Young Talents Program ; 41672190 ; 41672190 ; 41672190 ; 41672190 ; 41602184) ; 41602184) ; 41602184) ; 41602184) ; National Nature Science Foundation of China(41602197 ; National Nature Science Foundation of China(41602197 ; National Nature Science Foundation of China(41602197 ; National Nature Science Foundation of China(41602197 ; Chinese 1000 Young Talents Program ; Chinese 1000 Young Talents Program ; Chinese 1000 Young Talents Program ; Chinese 1000 Young Talents Program ; 41672190 ; 41672190 ; 41672190 ; 41672190 ; 41602184) ; 41602184) ; 41602184) ; 41602184) ; National Nature Science Foundation of China(41602197 ; National Nature Science Foundation of China(41602197 ; National Nature Science Foundation of China(41602197 ; National Nature Science Foundation of China(41602197 ; Chinese 1000 Young Talents Program ; Chinese 1000 Young Talents Program ; Chinese 1000 Young Talents Program ; Chinese 1000 Young Talents Program ; 41672190 ; 41672190 ; 41672190 ; 41672190 ; 41602184) ; 41602184) ; 41602184) ; 41602184) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/82480]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Wang, Luo-Juan; Guo, Jing-Hui |
| 作者单位 | 1.Sun Yat Sen Univ, Sch Earth Sci & Engn, Guangzhou 510275, Guangdong, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Luo-Juan,Guo, Jing-Hui,Yin, Changqing,et al. Petrogenesis of ca. 1.95 Ga meta-leucogranites from the Jining Complex in the Khondalite Belt, North China Craton: Water-fluxed melting of metasedimentary rocks[J]. PRECAMBRIAN RESEARCH,2017,303:355-371. |
| APA | Wang, Luo-Juan,Guo, Jing-Hui,Yin, Changqing,&Peng, Peng.(2017).Petrogenesis of ca. 1.95 Ga meta-leucogranites from the Jining Complex in the Khondalite Belt, North China Craton: Water-fluxed melting of metasedimentary rocks.PRECAMBRIAN RESEARCH,303,355-371. |
| MLA | Wang, Luo-Juan,et al."Petrogenesis of ca. 1.95 Ga meta-leucogranites from the Jining Complex in the Khondalite Belt, North China Craton: Water-fluxed melting of metasedimentary rocks".PRECAMBRIAN RESEARCH 303(2017):355-371. |
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来源：地质与地球物理研究所
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