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Prolonged anatexis of Paleoproterozoic metasedimentary basement: First evidence from the Yinchuan Basin and new constraints on the evolution of the Khondalite Belt, North China Craton

文献类型：期刊论文

作者Wang, Wei-(RZ)1,4; Gao, Shanlin2; Liu, Xiaochun1; Hu, Jianmin1; Zhao, Yue1; Wei, Chunjing3; Xiao, Wenjiao4; Guo, Hu5; Gong, Wangbin1
刊名PRECAMBRIAN RESEARCH
出版日期2017-11-01
卷号302页码:74-93
关键词Migmatite Phase Equilibrium Modelling P-t-t Path Zircon Geochronology Ti-in-zircon Thermometry Prograde/retrograde Monazite
ISSN号0301-9268
DOI10.1016/j.precamres.2017.09.007
文献子类Article
英文摘要Discerning the history of burial, residence at depth and exhumation of high grade metamorphic rocks from an orogen is essential to understanding crustal differentiation and orogenesis. Such high grade rocks are inferred to exist beneath the Yinchuan Basin, which is overlain by a thick covering of younger sediments, and is located at the inferred southwest boundary of the Paleoproterozoic Khondalite Belt in the northwestern North China Craton. The metamorphic basement sampled from a recently completed deep borehole in the Yinchuan Basin is migmatitic and contains an assemblage of garnet, biotite, sillimanite, plagioclase, quartz, minor K-feldspar and local occurrences of muscovite. Phase equilibrium modelling in the Na2O-CaO-K2O-FeO-MgO-Al2O3-SiO2-H2O-TiO2-O system constrains the peak P-T conditions of anatexis to 6-10 kbar at 760-810 degrees C, followed by final crystallization at 4.5-5.5 kbar and 690-710 degrees C. Ti-in-zircon thermometry for the narrow metamorphic zircon rims provides a temperature range of 687-753 degrees C, demonstrating formation during retrogression to the solidus. NanoSIMS U-Pb analyses on the metamorphic overgrowths of zircon grains yields an upper intercept age of 1895 +/- 36 Ma. Chronological and chemical analyses of monazite indicate irregular bright gray domains with relatively high Th and low Y and HREE contents developed during prograde metamorphism (1962 +/- 8 Ma). Conversely, dark domains with low Th and high Y and HREE overgrew during retrograde cooling (1892 +/- 14 Ma) that was synchronous with the development of metamorphic zircon rims. LA-ICP-MS U-Pb analyses of detrital zircons reveal that the metamorphic basement beneath the Yinchuan Basin has a sedimentary protolith of Paleoproterozoic age. The results directly confirm the existence of Paleoproterozoic basement beneath the Yinchuan Basin, and the well-constrained P-T-t path supports the involvement of the basement (as part of the western Khondalite Belt) in burial and exhumation processes during the 1.96-1.89 Ga period, during which anatexis occurred for similar to 70 Ma.
WOS关键词PB ZIRCON GEOCHRONOLOGY ; HIGH-GRADE METAMORPHISM ; LIAO-JI BELT ; PRESSURE PELITIC GRANULITES ; TRACE-ELEMENT GEOCHEMISTRY ; LA-ICP-MS ; U-TH-PB ; TECTONIC EVOLUTION ; WESTERN BLOCK ; JINING COMPLEX
WOS研究方向Geology
语种英语
WOS记录号WOS:000415908200005
出版者ELSEVIER SCIENCE BV
资助机构National Natural Science Foundation of China(41202047 ; National Natural Science Foundation of China(41202047 ; National Natural Science Foundation of China(41202047 ; National Natural Science Foundation of China(41202047 ; National Basic Research Program of China(2012CB416604) ; National Basic Research Program of China(2012CB416604) ; National Basic Research Program of China(2012CB416604) ; National Basic Research Program of China(2012CB416604) ; 41672062) ; 41672062) ; 41672062) ; 41672062) ; National Natural Science Foundation of China(41202047 ; National Natural Science Foundation of China(41202047 ; National Natural Science Foundation of China(41202047 ; National Natural Science Foundation of China(41202047 ; National Basic Research Program of China(2012CB416604) ; National Basic Research Program of China(2012CB416604) ; National Basic Research Program of China(2012CB416604) ; National Basic Research Program of China(2012CB416604) ; 41672062) ; 41672062) ; 41672062) ; 41672062) ; National Natural Science Foundation of China(41202047 ; National Natural Science Foundation of China(41202047 ; National Natural Science Foundation of China(41202047 ; National Natural Science Foundation of China(41202047 ; National Basic Research Program of China(2012CB416604) ; National Basic Research Program of China(2012CB416604) ; National Basic Research Program of China(2012CB416604) ; National Basic Research Program of China(2012CB416604) ; 41672062) ; 41672062) ; 41672062) ; 41672062) ; National Natural Science Foundation of China(41202047 ; National Natural Science Foundation of China(41202047 ; National Natural Science Foundation of China(41202047 ; National Natural Science Foundation of China(41202047 ; National Basic Research Program of China(2012CB416604) ; National Basic Research Program of China(2012CB416604) ; National Basic Research Program of China(2012CB416604) ; National Basic Research Program of China(2012CB416604) ; 41672062) ; 41672062) ; 41672062) ; 41672062)
源URL[http://ir.iggcas.ac.cn/handle/132A11/82116]  
专题中国科学院地质与地球物理研究所
通讯作者Wang, Wei-(RZ); Gao, Shanlin
作者单位1.Chinese Acad Geol Sci, Inst Geomech, Beijing 100081, Peoples R China
2.SINOPEC, Petr Explorat & Prod Res Inst, Beijing 100083, Peoples R China
3.Peking Univ, Sch Earth & Space Sci, MOE Key Lab Orogen Belts & Crustal Evolut, Beijing 100871, Peoples R China
4.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
5.Inst Geol & Mineral Resources, Tianjin 300170, Peoples R China
推荐引用方式
GB/T 7714		 Wang, Wei-,Gao, Shanlin,Liu, Xiaochun,et al. Prolonged anatexis of Paleoproterozoic metasedimentary basement: First evidence from the Yinchuan Basin and new constraints on the evolution of the Khondalite Belt, North China Craton[J]. PRECAMBRIAN RESEARCH,2017,302:74-93.
APA Wang, Wei-.,Gao, Shanlin.,Liu, Xiaochun.,Hu, Jianmin.,Zhao, Yue.,...&Gong, Wangbin.(2017).Prolonged anatexis of Paleoproterozoic metasedimentary basement: First evidence from the Yinchuan Basin and new constraints on the evolution of the Khondalite Belt, North China Craton.PRECAMBRIAN RESEARCH,302,74-93.
MLA Wang, Wei-,et al."Prolonged anatexis of Paleoproterozoic metasedimentary basement: First evidence from the Yinchuan Basin and new constraints on the evolution of the Khondalite Belt, North China Craton".PRECAMBRIAN RESEARCH 302(2017):74-93.

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来源：地质与地球物理研究所

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