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The effect of bulk rock composition in phase equilibria modelling: a case study of mafic granulites from the North China Craton
Zou, Lei1,2,3,4; Guo, Jing-Hui1,2,3; Huang, Guang-Yu1,3; Jiao, Shu-Juan1,3; Tian, Zhong-Hua4; Liu, Ping-Hua4
2022-02-01
Source PublicationCONTRIBUTIONS TO MINERALOGY AND PETROLOGY
ISSN0010-7999
Volume177Issue:2Pages:24
AbstractA mafic granulite with relatively simple mineralogy and texture from the Miyun Complex in the northern part of the North China Craton is used to discuss the effect of bulk composition uncertainty determined by different techniques [X-ray fluorescence (XRF), mapping, and point counting] on the calculated phase diagrams. LA-ICP-MS U-Pb dating of zircon from this mafic granulite yields magmatic ages of similar to 2.5-2.45 Ga and metamorphic overprinting ages of similar to 1.8 Ga, consistent with previous results. Based on phase equilibrium modelling, we show that the topological relations of the P-T pseudo-sections calculated from the XRF and point-counting compositions are similar except for the K-feldspar and Fe-Ti oxide stability fields and that the mineral stability fields in the P-T pseudo-section calculated from the mapping composition are distinctly different from the others. Furthermore, the observed and calculated mineral compositions (X All in plagioclase) and mineral proportions (garnet and plagioclase) are matched in the P-T pseudo-section calculated from the point-counting composition, but these are mismatched in the P-T pseudo-section calculated from the mapping composition. For the P-T pseudo-section calculated from the XRF composition, mineral composition isopleths can further constrain the narrow P-T conditions but the observed and calculated mineral proportions do not match. Moreover, we obtain similar T conditions using geo-thermometers (Ti-in-amphibole, two-feldspar, and REE-in-Grt-Cpx geo-thermometers). In addition, we calculated the uncertainties (of the phase-in/out lines and the mineral-proportions and -compositions isopleths) on the thermodynamic modelling and discussed the main source of uncertainties in detail.
KeywordMafic granulite Phase equilibrium modelling Effective bulk composition Mismatch North China Craton
DOI10.1007/s00410-022-01887-9
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Geological Investigation Project of the China Geological Survey ; Geological Investigation Project of the China Geological Survey ; Geological Investigation Project of the China Geological Survey ; Geological Investigation Project of the China Geological Survey ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Geological Investigation Project of the China Geological Survey ; Geological Investigation Project of the China Geological Survey ; Geological Investigation Project of the China Geological Survey ; Geological Investigation Project of the China Geological Survey ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Geological Investigation Project of the China Geological Survey ; Geological Investigation Project of the China Geological Survey ; Geological Investigation Project of the China Geological Survey ; Geological Investigation Project of the China Geological Survey ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Geological Investigation Project of the China Geological Survey ; Geological Investigation Project of the China Geological Survey ; Geological Investigation Project of the China Geological Survey ; Geological Investigation Project of the China Geological Survey
WOS KeywordTEMPERATURE METAMORPHIC ROCKS ; P-T CONDITIONS ; MINERAL EQUILIBRIA ; HF ISOTOPES ; TRACE-ELEMENTS ; U-PB ; REACTION TEXTURES ; REACTION PROGRESS ; RARE-EARTH ; CONSTRAINTS
Language英语
Funding ProjectNational Natural Science Foundation of China[41972205] ; National Natural Science Foundation of China[41890832] ; National Natural Science Foundation of China[41672191] ; Geological Investigation Project of the China Geological Survey[DD20190003] ; Geological Investigation Project of the China Geological Survey[DD20190370]
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Geological Investigation Project of the China Geological Survey ; Geological Investigation Project of the China Geological Survey ; Geological Investigation Project of the China Geological Survey ; Geological Investigation Project of the China Geological Survey ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Geological Investigation Project of the China Geological Survey ; Geological Investigation Project of the China Geological Survey ; Geological Investigation Project of the China Geological Survey ; Geological Investigation Project of the China Geological Survey ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Geological Investigation Project of the China Geological Survey ; Geological Investigation Project of the China Geological Survey ; Geological Investigation Project of the China Geological Survey ; Geological Investigation Project of the China Geological Survey ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Geological Investigation Project of the China Geological Survey ; Geological Investigation Project of the China Geological Survey ; Geological Investigation Project of the China Geological Survey ; Geological Investigation Project of the China Geological Survey
WOS Research AreaGeochemistry & Geophysics ; Mineralogy
WOS SubjectGeochemistry & Geophysics ; Mineralogy
WOS IDWOS:000749201600001
PublisherSPRINGER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/104021
Collection岩石圈演化国家重点实验室
Corresponding AuthorLiu, Ping-Hua
Affiliation1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
2.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China
4.Chinese Acad Geol Sci, Inst Geol, 26 Baiwanzhuang Rd, Beijing 100037, Peoples R China
First Author AffilicationState Key Laboratory of Lithospheric Evolution
Recommended Citation
GB/T 7714
Zou, Lei,Guo, Jing-Hui,Huang, Guang-Yu,et al. The effect of bulk rock composition in phase equilibria modelling: a case study of mafic granulites from the North China Craton[J]. CONTRIBUTIONS TO MINERALOGY AND PETROLOGY,2022,177(2):24.
APA Zou, Lei,Guo, Jing-Hui,Huang, Guang-Yu,Jiao, Shu-Juan,Tian, Zhong-Hua,&Liu, Ping-Hua.(2022).The effect of bulk rock composition in phase equilibria modelling: a case study of mafic granulites from the North China Craton.CONTRIBUTIONS TO MINERALOGY AND PETROLOGY,177(2),24.
MLA Zou, Lei,et al."The effect of bulk rock composition in phase equilibria modelling: a case study of mafic granulites from the North China Craton".CONTRIBUTIONS TO MINERALOGY AND PETROLOGY 177.2(2022):24.
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