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Establishing the P-T path of UHT granulites by geochemically distinguishing peritectic from retrograde garnet

文献类型：期刊论文

作者Jiao, Shujuan2,3,4; Evans, Noreen J.4,5; Guo, Jinghui2,3,6; Fitzsimons, Ian C. W.4; Zi, Jian-Wei1,5; McDonald, Bradley J.4,5
刊名AMERICAN MINERALOGIST
出版日期2021-10-01
卷号106期号:10页码:1640-1653
关键词Garnet P-T path trace element UHT Khondalite Belt North China Craton
ISSN号0003-004X
DOI10.2138/am-2021-7681
英文摘要The P-T evolution (and particularly the prograde path segment) of ultrahigh-temperature (UHT) granulites is commonly ambiguous, hampering our understanding of deep crustal processes. Here, we establish the P-T path by distinguishing garnet origin (peritectic or retrograde) based on the combined Ca, Ti, Zr, and Y+REE chemical signatures, using the residual UHT granulites of the Khondalite Belt, North China Craton, as a test case. In these rocks, peritectic garnet is characterized by rare inclusions, whereas retrograde garnet has overprinted the main foliation and is characterized by abundant biotite and sillimanite inclusions, which are interpreted to have grown together with retrograde garnet during cooling. Zirconium in peritectic garnet increases from 10 to 50 ppm with garnet growth. In contrast, Zr in retrograde garnet generally decreases from 60 to 10 ppm with garnet growth. A similar trend is observed for Ti. Temperatures calculated from the Ti-in-garnet geothermometer increase from 830 to 980 degrees C based on Ti in peritectic garnet, indicating prograde partial melting, whereas decrease from 900 to 700 degrees C based on Ti in retrograde garnet, indicating post-peak cooling. Peritectic and retrograde garnets show distinct Eu/Eu* (0.2-0.5 vs. 0.05-0.2, respectively) and Ca contents (6000-12 000 vs. 4000-6000 ppm, respectively), which generally decrease with progressive garnet crystallization. The pressures calculated from the Ca-in-garnet geobarometer in peritectic and retrograde garnet are 9-11 and 7-9 kbar, respectively. Peritectic garnet shows a bell-shaped Y (80-340 ppm) pattern, whereas retrograde garnet shows an increase in Y content (20-100 ppm) toward rims. Taken together, these results establish a P-T path comprised of an earlier high-pressure peritectic garnet formation during prograde partial melting before the UHT peak anda late abundant retrograde formation during post-peak cooling stage. We conclude that change of Zr and other elements (e.g., Ti, Ca, Y, and Eu/Eu*) can well distinguish different garnet formation events in UHT granulites, which is critical for the P-T path establishment, and further sheds light on the cause of UHT metamorphism and the geodynamic evolution.
WOS关键词NORTH CHINA CRATON ; ULTRAHIGH-TEMPERATURE METAMORPHISM ; MINERAL EQUILIBRIA CALCULATIONS ; CALCULATED PHASE-EQUILIBRIA ; KHONDALITE BELT ; U-PB ; HELANSHAN COMPLEX ; INNER-MONGOLIA ; GROWTH ; ELEMENT
资助项目National Natural Science Foundation of China (NSFC)[41672189] ; National Natural Science Foundation of China (NSFC)[41890832] ; Youth Innovation Promotion Association, Chinese Academy of Sciences (CAS)[2018089] ; Australian Research Council[DP150102773] ; AuScope ; Australian Government via the National Collaborative Research Infrastructure Strategy (NCRIS) ; Australian Research Council LIEF program[LE150100013]
WOS研究方向Geochemistry & Geophysics ; Mineralogy
语种英语
WOS记录号WOS:000715811700001
出版者MINERALOGICAL SOC AMER
资助机构National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Youth Innovation Promotion Association, Chinese Academy of Sciences (CAS) ; Youth Innovation Promotion Association, Chinese Academy of Sciences (CAS) ; Youth Innovation Promotion Association, Chinese Academy of Sciences (CAS) ; Youth Innovation Promotion Association, Chinese Academy of Sciences (CAS) ; Australian Research Council ; Australian Research Council ; Australian Research Council ; Australian Research Council ; AuScope ; AuScope ; AuScope ; AuScope ; Australian Government via the National Collaborative Research Infrastructure Strategy (NCRIS) ; Australian Government via the National Collaborative Research Infrastructure Strategy (NCRIS) ; Australian Government via the National Collaborative Research Infrastructure Strategy (NCRIS) ; Australian Government via the National Collaborative Research Infrastructure Strategy (NCRIS) ; Australian Research Council LIEF program ; Australian Research Council LIEF program ; Australian Research Council LIEF program ; Australian Research Council LIEF program ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Youth Innovation Promotion Association, Chinese Academy of Sciences (CAS) ; Youth Innovation Promotion Association, Chinese Academy of Sciences (CAS) ; Youth Innovation Promotion Association, Chinese Academy of Sciences (CAS) ; Youth Innovation Promotion Association, Chinese Academy of Sciences (CAS) ; Australian Research Council ; Australian Research Council ; Australian Research Council ; Australian Research Council ; AuScope ; AuScope ; AuScope ; AuScope ; Australian Government via the National Collaborative Research Infrastructure Strategy (NCRIS) ; Australian Government via the National Collaborative Research Infrastructure Strategy (NCRIS) ; Australian Government via the National Collaborative Research Infrastructure Strategy (NCRIS) ; Australian Government via the National Collaborative Research Infrastructure Strategy (NCRIS) ; Australian Research Council LIEF program ; Australian Research Council LIEF program ; Australian Research Council LIEF program ; Australian Research Council LIEF program ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Youth Innovation Promotion Association, Chinese Academy of Sciences (CAS) ; Youth Innovation Promotion Association, Chinese Academy of Sciences (CAS) ; Youth Innovation Promotion Association, Chinese Academy of Sciences (CAS) ; Youth Innovation Promotion Association, Chinese Academy of Sciences (CAS) ; Australian Research Council ; Australian Research Council ; Australian Research Council ; Australian Research Council ; AuScope ; AuScope ; AuScope ; AuScope ; Australian Government via the National Collaborative Research Infrastructure Strategy (NCRIS) ; Australian Government via the National Collaborative Research Infrastructure Strategy (NCRIS) ; Australian Government via the National Collaborative Research Infrastructure Strategy (NCRIS) ; Australian Government via the National Collaborative Research Infrastructure Strategy (NCRIS) ; Australian Research Council LIEF program ; Australian Research Council LIEF program ; Australian Research Council LIEF program ; Australian Research Council LIEF program ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Youth Innovation Promotion Association, Chinese Academy of Sciences (CAS) ; Youth Innovation Promotion Association, Chinese Academy of Sciences (CAS) ; Youth Innovation Promotion Association, Chinese Academy of Sciences (CAS) ; Youth Innovation Promotion Association, Chinese Academy of Sciences (CAS) ; Australian Research Council ; Australian Research Council ; Australian Research Council ; Australian Research Council ; AuScope ; AuScope ; AuScope ; AuScope ; Australian Government via the National Collaborative Research Infrastructure Strategy (NCRIS) ; Australian Government via the National Collaborative Research Infrastructure Strategy (NCRIS) ; Australian Government via the National Collaborative Research Infrastructure Strategy (NCRIS) ; Australian Government via the National Collaborative Research Infrastructure Strategy (NCRIS) ; Australian Research Council LIEF program ; Australian Research Council LIEF program ; Australian Research Council LIEF program ; Australian Research Council LIEF program
源URL[http://ir.iggcas.ac.cn/handle/132A11/103825]  
专题地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者Jiao, Shujuan
作者单位1.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
3.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China
4.Curtin Univ, Sch Earth & Planetary Sci, Perth, WA 6845, Australia
5.Curtin Univ, John de Laeter Ctr, Perth, WA 6845, Australia
6.China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Wuhan 430074, Peoples R China
推荐引用方式
GB/T 7714		 Jiao, Shujuan,Evans, Noreen J.,Guo, Jinghui,et al. Establishing the P-T path of UHT granulites by geochemically distinguishing peritectic from retrograde garnet[J]. AMERICAN MINERALOGIST,2021,106(10):1640-1653.
APA Jiao, Shujuan,Evans, Noreen J.,Guo, Jinghui,Fitzsimons, Ian C. W.,Zi, Jian-Wei,&McDonald, Bradley J..(2021).Establishing the P-T path of UHT granulites by geochemically distinguishing peritectic from retrograde garnet.AMERICAN MINERALOGIST,106(10),1640-1653.
MLA Jiao, Shujuan,et al."Establishing the P-T path of UHT granulites by geochemically distinguishing peritectic from retrograde garnet".AMERICAN MINERALOGIST 106.10(2021):1640-1653.

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来源：地质与地球物理研究所

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