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Rheological behavior of high temperature garnet-bearing migmatites: The Khondalite Belt example (North China Craton)
Lobjoie, Cyril1; Trap, Pierre1; Oliot, Emilien2; Lin, Wei3; Barou, Fabrice2; Goncalves, Philippe1; Marquer, Didier1
2020-02-01
Source PublicationJOURNAL OF STRUCTURAL GEOLOGY
ISSN0191-8141
Volume131Pages:17
AbstractThe contribution presents microstructural and petrological results obtained on garnet-bearing felsic migmatites from the Khondalite Belt (North China Craton). The study focused on low-melt fraction felsic migmatites in which peritectic garnet are strongly elongated and show plastic deformation. These peritectic garnet grains show different typology depending on their petrographic location within the layered migmatite. An elongated shaped garnet with sillimanite and biotite inclusion lies within Al-rich layer whereas poecilithic garnets are located within S-rich layers, forming a garnet-quartz aggregate. The study presents petrological, microstructural observation and EBSD analyses of the garnet grains and garnet-quartz aggregates. Phase diagram sections modeling allows to constrain the P-T conditions of the deformation at 850-1000 degrees C and 0.6-1.1 GPa. At such high-to ultra-high temperature conditions, a low melt fraction was produced, between 1 and 12% (generally under 7%). Forescattered diffraction and misorientation maps with Orientation Pole Figure argue for dislocation creep with development of subgrains in garnets. Our results suggest that at high-to ultra-high temperature, the quartz-feldspar-garnet solid framework of felsic migmatites strongly accommodate the deformation and contribute to weakening of migmatite even at low melt fraction.
KeywordFelsic migmatites Garnet deformation mechanisms EBSD Khondalite belt North China craton
DOI10.1016/j.jsg.2019.103910
Funding OrganizationNational Key R&D Program of China ; National Key R&D Program of China ; NSFC ; NSFC ; National Key R&D Program of China ; National Key R&D Program of China ; NSFC ; NSFC ; National Key R&D Program of China ; National Key R&D Program of China ; NSFC ; NSFC ; National Key R&D Program of China ; National Key R&D Program of China ; NSFC ; NSFC
WOS KeywordP-T PATH ; MONGOLIA SUTURE ZONE ; PLASTIC-DEFORMATION ; SILICATE GARNETS ; PHASE-EQUILIBRIA ; CRYSTAL PLASTICITY ; PELITIC GRANULITES ; DAQINGSHAN COMPLEX ; TECTONIC EVOLUTION ; CONTINENTAL-CRUST
Language英语
Funding ProjectNational Key R&D Program of China[2016YFC0600401] ; National Key R&D Program of China[2016YFC0600102] ; NSFC[41502215] ; NSFC[41472193]
Funding OrganizationNational Key R&D Program of China ; National Key R&D Program of China ; NSFC ; NSFC ; National Key R&D Program of China ; National Key R&D Program of China ; NSFC ; NSFC ; National Key R&D Program of China ; National Key R&D Program of China ; NSFC ; NSFC ; National Key R&D Program of China ; National Key R&D Program of China ; NSFC ; NSFC
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000512484400006
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/95673
Collection岩石圈演化国家重点实验室
Corresponding AuthorLobjoie, Cyril
Affiliation1.Univ Bourgogne Franche Comte, UMR Chronoenvironm 6249, F-25030 Besancon, France
2.Univ Montpellier, CNRS, UMR Geosci Montpellier 5243, F-34095 Montpellier 05, France
3.Chinese Acad Sci, Inst Earth Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
Recommended Citation
GB/T 7714
Lobjoie, Cyril,Trap, Pierre,Oliot, Emilien,et al. Rheological behavior of high temperature garnet-bearing migmatites: The Khondalite Belt example (North China Craton)[J]. JOURNAL OF STRUCTURAL GEOLOGY,2020,131:17.
APA Lobjoie, Cyril.,Trap, Pierre.,Oliot, Emilien.,Lin, Wei.,Barou, Fabrice.,...&Marquer, Didier.(2020).Rheological behavior of high temperature garnet-bearing migmatites: The Khondalite Belt example (North China Craton).JOURNAL OF STRUCTURAL GEOLOGY,131,17.
MLA Lobjoie, Cyril,et al."Rheological behavior of high temperature garnet-bearing migmatites: The Khondalite Belt example (North China Craton)".JOURNAL OF STRUCTURAL GEOLOGY 131(2020):17.
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