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High-Ultrahigh Temperature Metamorphism in the Larsemann Hills: Insights into the Tectono-Thermal Evolution of the Prydz Bay Region, East Antarctica
Wang, Wei-(RZ)1,2; Zhao, Yue1,2; Wei, Chunjing3; Daczko, Nathan R.4; Liu, Xiaochun1,2; Xiao, Wenjiao5,6; Zhang, Zhiyong6
2022-02-03
Source PublicationJOURNAL OF PETROLOGY
ISSN0022-3530
Volume63Issue:2Pages:30
AbstractAs one of the widest terranes exposed in icy Antarctica, the Larsemann Hills in the Prydz Bay belt preserves diverse rock types with a complex metamorphic history and thus is critical to the tectono-metamorphic evolution of East Antarctica. Garnet-sillimanite-spinel-cordierite-bearing and garnet-orthopyroxene-bearing granulites are typical rocks in the region. Phase equilibrium modelling and mineral thermometry based on detailed petrological and mineralogical analyses indicate that the granulites underwent extreme metamorphism with peak conditions to ultrahigh temperatures (UHTs). The high-UHT metamorphism is characterised by extremely high dT/dP values (>1000 degrees C/GPa) along a clockwise path with evident decompression at high temperatures and subsequent near isobaric cooling. Textural relationships, in situ NanoSIMS zircon U-Pb analysis, and LA-ICP-MS zircon and monazite dating and trace element analysis indicate protracted tectono-thermal evolution from the latest Neoproterozoic to early Palaeozoic (c. 570-500 Ma), with a prograde stage likely from c. 570 to c. 550 Ma, a peak stage from c. 550 to c. 540 Ma, and a retrograde stage from c. 540 to c. 500 Ma. During the retrograde stage, major decompression should have occurred before c. 530 Ma, as indicated by the age of zircon included in spinel, and then near isobaric cooling followed and persisted from c. 530 to c. 500 Ma. The geochronological data contribute to the establishment of the thermal-temporal framework of the late Neoproterozoic to early Palaeozoic Prydz tectonic event. The results also indicate that the assemblage of the investigated granulites basically resulted from the late Neoproterozoic to the early Palaeozoic tectono-thermal event, and the high-UHT conditions revealed by the granulites in the Larsemann Hills imply a much wider distribution of high heat flow and potential UHT metamorphism in the Prydz Bay region. Both the Larsemann Hills and the Rauer Group may have been in a similar and interrelated tectono-thermal setting from the late Neoproterozoic to the early Palaeozoic during the assembly of the Gondwana supercontinent.
Keywordthe Larsemann Hills ultrahigh temperature metamorphism phase equilibrium modelling mineral solvus thermometry Fe-Ti oxide zircon and monazite petrochronology trace elements
DOI10.1093/petrology/egac002
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds of the Chinese Academy of Geological Sciences (CAGS) ; Fundamental Research Funds of the Chinese Academy of Geological Sciences (CAGS) ; geological survey programme ; geological survey programme ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds of the Chinese Academy of Geological Sciences (CAGS) ; Fundamental Research Funds of the Chinese Academy of Geological Sciences (CAGS) ; geological survey programme ; geological survey programme ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds of the Chinese Academy of Geological Sciences (CAGS) ; Fundamental Research Funds of the Chinese Academy of Geological Sciences (CAGS) ; geological survey programme ; geological survey programme ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds of the Chinese Academy of Geological Sciences (CAGS) ; Fundamental Research Funds of the Chinese Academy of Geological Sciences (CAGS) ; geological survey programme ; geological survey programme
WOS KeywordGRANULITE-FACIES METAMORPHISM ; HIGH-GRADE METAMORPHISM ; U-TH-PB ; RAUER-GROUP ; METAPELITIC GRANULITES ; PHASE-EQUILIBRIA ; UHT METAMORPHISM ; GEOLOGICAL RELATIONSHIPS ; ISOTOPIC SYSTEMATICS ; BRATTSTRAND BLUFFS
Language英语
Funding ProjectNational Natural Science Foundation of China[41941004] ; National Natural Science Foundation of China[41530209] ; National Natural Science Foundation of China[42172068] ; National Natural Science Foundation of China[41672062] ; Fundamental Research Funds of the Chinese Academy of Geological Sciences (CAGS)[JYYWF201819] ; geological survey programme[DD20190579]
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds of the Chinese Academy of Geological Sciences (CAGS) ; Fundamental Research Funds of the Chinese Academy of Geological Sciences (CAGS) ; geological survey programme ; geological survey programme ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds of the Chinese Academy of Geological Sciences (CAGS) ; Fundamental Research Funds of the Chinese Academy of Geological Sciences (CAGS) ; geological survey programme ; geological survey programme ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds of the Chinese Academy of Geological Sciences (CAGS) ; Fundamental Research Funds of the Chinese Academy of Geological Sciences (CAGS) ; geological survey programme ; geological survey programme ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds of the Chinese Academy of Geological Sciences (CAGS) ; Fundamental Research Funds of the Chinese Academy of Geological Sciences (CAGS) ; geological survey programme ; geological survey programme
WOS Research AreaGeochemistry & Geophysics
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:000791509500001
PublisherOXFORD UNIV PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/105187
Collection岩石圈演化国家重点实验室
Corresponding AuthorWang, Wei-(RZ)
Affiliation1.Chinese Acad Geol Sci, Inst Geomech, Beijing 100081, Peoples R China
2.Minist Nat Resources, Key Lab Paleomagnetism & Tecton Reconstruct, Beijing 100081, Peoples R China
3.Peking Univ, Sch Earth & Space Sci, MOE Key Lab Orogen Belts & Crustal Evolut, Beijing 100871, Peoples R China
4.Macquarie Univ, Australian Res Council Ctr Excellence Core Crust, Dept Earth & Environm Sci, Sydney, NSW 2109, Australia
5.Chinese Acad Sci, Xinjiang Res Ctr Mineral Resources, Xinjiang Inst Ecol & Geog, Urumqi 830011, Peoples R China
6.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
Recommended Citation
GB/T 7714
Wang, Wei-,Zhao, Yue,Wei, Chunjing,et al. High-Ultrahigh Temperature Metamorphism in the Larsemann Hills: Insights into the Tectono-Thermal Evolution of the Prydz Bay Region, East Antarctica[J]. JOURNAL OF PETROLOGY,2022,63(2):30.
APA Wang, Wei-.,Zhao, Yue.,Wei, Chunjing.,Daczko, Nathan R..,Liu, Xiaochun.,...&Zhang, Zhiyong.(2022).High-Ultrahigh Temperature Metamorphism in the Larsemann Hills: Insights into the Tectono-Thermal Evolution of the Prydz Bay Region, East Antarctica.JOURNAL OF PETROLOGY,63(2),30.
MLA Wang, Wei-,et al."High-Ultrahigh Temperature Metamorphism in the Larsemann Hills: Insights into the Tectono-Thermal Evolution of the Prydz Bay Region, East Antarctica".JOURNAL OF PETROLOGY 63.2(2022):30.
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