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Discovery of kyanite in typically cordierite/sillimanite-bearing low- to medium-pressure pelitic granulites from the Jiaobei terrain, North China Craton

文献类型：期刊论文

作者Zou, Yi1,2,3; Zhai, Mingguo3,4; Mitchell, Ross N.3; Zhao, Lei3; Zhou, Ligang1; Liu, Bo3; Wang, Yuquan3; Chen, Mengdie3
刊名PRECAMBRIAN RESEARCH
出版日期2020-06-15
卷号342页码:24
ISSN号0301-9268
关键词Pelitic granulites Cordierite Kyanite High-pressure granulite-facies Paleoproterozoic plate tectonics
DOI10.1016/j.precamres.2020.105677
英文摘要The pelitic granulites along the Paleoproterozoic Jiao-Liao-Ji belt (JLJB) are dominated by cordierite/sillimanite-bearing low- to medium-pressure (LMP) conditions. Recent studies have recognized a few typical high-pressure (HP) pelitic granulites without retrograde cordierite from the Jiaobei terrane, the southern part of the JLJB. The relationship between the dominant LMP and rare HP pelitic granulites is not well constrained, and whether the LMP types are retrograde products of the HP ones remains uncertain. This uncertainty precludes a full understanding of the original spatial distribution of HP pelitic granulites and the tectonic affinity of the JLJB. We identify in this study for the first time, relict kyanite and the mineral assemblage of kyanite + K-feldspar + rutile + garnet from typically cordierite/sillimanite-bearing LMP pelitic granulites within the Jiaobei terrane. Integrated results from petrology, pseudosection modeling, geothermobarometry, and zircon and monazite U-Pb geochronology suggest that these LMP pelitic granulites experienced an earlier HP granulite-facies metamorphism possibly at similar to 1.95 Ga, with minimum P-T conditions of 13-14 kbar and 860-870 degrees C. Subsequently, these rocks underwent near isothermal decompression to 4-7 kbar and > 840 degrees C, followed by isobaric cooling to similar to 600 degrees C and 4-6 kbar. The decompression and cooling triggered LMP granulite-facies retrogression at similar to 1.85 Ga that eclipsed the earlier HP granulite-facies records. The clockwise P-T-t path defined is consistent with those reported from typical HP pelitic and mafic granulites elsewhere in the Jiaobei terrane. The results confirm that at least some portions of the typically cordierite/sillimanite-bearing LMP pelitic granulites are retrograded from the HP types. This greatly expands the spatial distribution of HP pelitic granulites and suggests a linear HP granulite-facies metamorphic belt within the Jiaobei terrane. The linear distribution of HP pelitic granulites whose protoliths are sedimentary rocks from Earth's surface and the consistent clockwise P-T-t paths require Paleoproterozoic subduction, collision, and exhumation processes similar to those operating in modern plate tectonics. Our results from the JLJB thus provide new metamorphic constraints on the nature of Paleoproterozoic plate tectonics, and have implications for other Precambrian high-grade terranes worldwide where pelitic granulites are dominated by LMP types.
WOS关键词LIAO-JI BELT ; P-T PATH ; LU-HF ISOTOPES ; MINERAL EQUILIBRIA CALCULATIONS ; NATURAL REFERENCE MATERIAL ; TEMPERATURE TIME PATHS ; META-MAFIC ROCKS ; HIGH-GRADE ROCKS ; SIMS U-PB ; PHASE-EQUILIBRIA
资助项目National Natural Science Foundation of China[41530208] ; National Natural Science Foundation of China[41890834] ; Chinese Acedemy of Sciences[QYZDY-SSW-DQC017] ; Key Laboratory of Mineral Resources, IGGCAS[KLMR2017-06]
WOS研究方向Geology
语种英语
出版者ELSEVIER
WOS记录号WOS:000528208200016
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Acedemy of Sciences ; Chinese Acedemy of Sciences ; Chinese Acedemy of Sciences ; Chinese Acedemy of Sciences ; Key Laboratory of Mineral Resources, IGGCAS ; Key Laboratory of Mineral Resources, IGGCAS ; Key Laboratory of Mineral Resources, IGGCAS ; Key Laboratory of Mineral Resources, IGGCAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Acedemy of Sciences ; Chinese Acedemy of Sciences ; Chinese Acedemy of Sciences ; Chinese Acedemy of Sciences ; Key Laboratory of Mineral Resources, IGGCAS ; Key Laboratory of Mineral Resources, IGGCAS ; Key Laboratory of Mineral Resources, IGGCAS ; Key Laboratory of Mineral Resources, IGGCAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Acedemy of Sciences ; Chinese Acedemy of Sciences ; Chinese Acedemy of Sciences ; Chinese Acedemy of Sciences ; Key Laboratory of Mineral Resources, IGGCAS ; Key Laboratory of Mineral Resources, IGGCAS ; Key Laboratory of Mineral Resources, IGGCAS ; Key Laboratory of Mineral Resources, IGGCAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Acedemy of Sciences ; Chinese Acedemy of Sciences ; Chinese Acedemy of Sciences ; Chinese Acedemy of Sciences ; Key Laboratory of Mineral Resources, IGGCAS ; Key Laboratory of Mineral Resources, IGGCAS ; Key Laboratory of Mineral Resources, IGGCAS ; Key Laboratory of Mineral Resources, IGGCAS
源URL[http://ir.iggcas.ac.cn/handle/132A11/96211]  
专题地质与地球物理研究所_岩石圈演化国家重点实验室
地质与地球物理研究所_中国科学院矿产资源研究重点实验室
通讯作者Zhai, Mingguo
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China
2.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
4.Univ Chinese Acad Sci, Key Lab Computat Geodynam, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Zou, Yi,Zhai, Mingguo,Mitchell, Ross N.,et al. Discovery of kyanite in typically cordierite/sillimanite-bearing low- to medium-pressure pelitic granulites from the Jiaobei terrain, North China Craton[J]. PRECAMBRIAN RESEARCH,2020,342:24.
APA Zou, Yi.,Zhai, Mingguo.,Mitchell, Ross N..,Zhao, Lei.,Zhou, Ligang.,...&Chen, Mengdie.(2020).Discovery of kyanite in typically cordierite/sillimanite-bearing low- to medium-pressure pelitic granulites from the Jiaobei terrain, North China Craton.PRECAMBRIAN RESEARCH,342,24.
MLA Zou, Yi,et al."Discovery of kyanite in typically cordierite/sillimanite-bearing low- to medium-pressure pelitic granulites from the Jiaobei terrain, North China Craton".PRECAMBRIAN RESEARCH 342(2020):24.

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来源：地质与地球物理研究所

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