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A newly discovered Late Cretaceous metamorphic belt along the active continental margin of the Neo-Tethys ocean
Wang, Dan1; Fu-Lai Liu1; Palin, Richard2; Jia-Min Wang3; Wo, Mathias4; Ji, Lei1; Wang, Fang1
2022
Source PublicationGEOLOGICAL SOCIETY OF AMERICA BULLETIN
ISSN0016-7606
Volume134Issue:1-2Pages:223-240
AbstractHigh-grade metamorphic rocks and crustal melts provide crucial evidence for growth and differentiation of the continental crust, and are widespread in collisional orogens. However, their importance in the evolution of continental arcs remains poorly understood. Metamorphism and related anatexis in the preserved continental margin of the Neo-Tethys ocean serves as a key natural laboratory to investigate this process. Along the Neo-Tethyan arc margin, the Gaoligong shear zone, Yunnan region of China, is an important locality for linking Lhasa in the north with Sibumasu and Burma in the south. Here, Late Cretaceous granulitefacies metamorphism and crustal anatexis have been identified for the first time in the Gaoligong area. Zircon and monazite U-Pb dating indicates that S-type granites formed at 87-73 Ma, granites and buried pelitic sediments were simultaneously metamorphosed at 75-70 Ma during Neo-Tethyan subduction, and all lithologies were overprinted by a younger 40-30 Ma magmatic and strike-slip event related to India-Asia collision. Phase equilibria modeling of high-grade anatectic gneiss in the MnO-Na2O-CaO-K2O-FeO-MgO-Al2O3-SiO2-H2O-TiO2 system indicates peak pressure-temperature (P-T) conditions of 780-800 degrees C and 6.5-7.5 kbar and defines a cooling and decompressional P-T path for the metapelites. This demonstrates that sediments within the Neo-Tethyan active conti- nental arc were buried to >20 km depth at 75-70 Ma. In combination with the metamorphic record of the Lhasa, Burma, and Sibumasu blocks, an extensive Late Cretaceous metamorphic belt must have formed along the Neo-Tethyan subduction zone. This spatially correlates with coeval gabbro-diorite suites exposed in the Gangdese, Sibumasu and Burma terranes that were triggered by thinning of the lithospheric mantle. This prolonged Late Cretaceous mantle-derived magmatism and lithospheric thinning may have provided a regional-scale heat source for high-grade metamorphism and crustal anatexis along the active continental margin of the Neo-Tethys ocean.
DOI10.1130/B35900.1
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; Basic Scientific Research Foundations of the Institute of Geology, Chinese Academy of Geological Sciences ; Basic Scientific Research Foundations of the Institute of Geology, Chinese Academy of Geological Sciences ; Foundation of Key Laboratory of Deep-Earth Dynamics of Ministry of Natural Resources ; Foundation of Key Laboratory of Deep-Earth Dynamics of Ministry of Natural Resources ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; Basic Scientific Research Foundations of the Institute of Geology, Chinese Academy of Geological Sciences ; Basic Scientific Research Foundations of the Institute of Geology, Chinese Academy of Geological Sciences ; Foundation of Key Laboratory of Deep-Earth Dynamics of Ministry of Natural Resources ; Foundation of Key Laboratory of Deep-Earth Dynamics of Ministry of Natural Resources ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; Basic Scientific Research Foundations of the Institute of Geology, Chinese Academy of Geological Sciences ; Basic Scientific Research Foundations of the Institute of Geology, Chinese Academy of Geological Sciences ; Foundation of Key Laboratory of Deep-Earth Dynamics of Ministry of Natural Resources ; Foundation of Key Laboratory of Deep-Earth Dynamics of Ministry of Natural Resources ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; Basic Scientific Research Foundations of the Institute of Geology, Chinese Academy of Geological Sciences ; Basic Scientific Research Foundations of the Institute of Geology, Chinese Academy of Geological Sciences ; Foundation of Key Laboratory of Deep-Earth Dynamics of Ministry of Natural Resources ; Foundation of Key Laboratory of Deep-Earth Dynamics of Ministry of Natural Resources
WOS KeywordRIVER SHEAR ZONE ; ZIRCON U-PB ; EASTERN HIMALAYAN SYNTAXIS ; PARTIAL MELTING EQUILIBRIA ; HF ISOTOPIC CONSTRAINTS ; INDIA-ASIA COLLISION ; S-TYPE GRANITES ; NORTH CASCADES ; TECTONIC EVOLUTION ; WESTERN YUNNAN
Language英语
Funding ProjectNational Natural Science Foundation of China[91855206] ; National Natural Science Foundation of China[41372069] ; National Natural Science Foundation of China[41972065] ; National Key Research and Development Project of China[2016YFC0600310] ; Basic Scientific Research Foundations of the Institute of Geology, Chinese Academy of Geological Sciences[J2001] ; Foundation of Key Laboratory of Deep-Earth Dynamics of Ministry of Natural Resources[J1901-20-2]
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; Basic Scientific Research Foundations of the Institute of Geology, Chinese Academy of Geological Sciences ; Basic Scientific Research Foundations of the Institute of Geology, Chinese Academy of Geological Sciences ; Foundation of Key Laboratory of Deep-Earth Dynamics of Ministry of Natural Resources ; Foundation of Key Laboratory of Deep-Earth Dynamics of Ministry of Natural Resources ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; Basic Scientific Research Foundations of the Institute of Geology, Chinese Academy of Geological Sciences ; Basic Scientific Research Foundations of the Institute of Geology, Chinese Academy of Geological Sciences ; Foundation of Key Laboratory of Deep-Earth Dynamics of Ministry of Natural Resources ; Foundation of Key Laboratory of Deep-Earth Dynamics of Ministry of Natural Resources ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; Basic Scientific Research Foundations of the Institute of Geology, Chinese Academy of Geological Sciences ; Basic Scientific Research Foundations of the Institute of Geology, Chinese Academy of Geological Sciences ; Foundation of Key Laboratory of Deep-Earth Dynamics of Ministry of Natural Resources ; Foundation of Key Laboratory of Deep-Earth Dynamics of Ministry of Natural Resources ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; Basic Scientific Research Foundations of the Institute of Geology, Chinese Academy of Geological Sciences ; Basic Scientific Research Foundations of the Institute of Geology, Chinese Academy of Geological Sciences ; Foundation of Key Laboratory of Deep-Earth Dynamics of Ministry of Natural Resources ; Foundation of Key Laboratory of Deep-Earth Dynamics of Ministry of Natural Resources
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000740439000005
PublisherGEOLOGICAL SOC AMER, INC
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/103983
Collection岩石圈演化国家重点实验室
Corresponding AuthorWang, Dan
Affiliation1.Chinese Acad Geol Sci, Inst Geol, Key Lab Deep Earth Dynam, Minist Nat Resources, Beijing 100037, Peoples R China
2.Univ Oxford, Dept Earth Sci, South Parks Rd, Oxford OX1 3AN, England
3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
4.Univ Basel, Dept Environm Sci Mineral & Petrol, Bernoullistr 30, CH-4056 Basel, Switzerland
Recommended Citation
GB/T 7714
Wang, Dan,Fu-Lai Liu,Palin, Richard,et al. A newly discovered Late Cretaceous metamorphic belt along the active continental margin of the Neo-Tethys ocean[J]. GEOLOGICAL SOCIETY OF AMERICA BULLETIN,2022,134(1-2):223-240.
APA Wang, Dan.,Fu-Lai Liu.,Palin, Richard.,Jia-Min Wang.,Wo, Mathias.,...&Wang, Fang.(2022).A newly discovered Late Cretaceous metamorphic belt along the active continental margin of the Neo-Tethys ocean.GEOLOGICAL SOCIETY OF AMERICA BULLETIN,134(1-2),223-240.
MLA Wang, Dan,et al."A newly discovered Late Cretaceous metamorphic belt along the active continental margin of the Neo-Tethys ocean".GEOLOGICAL SOCIETY OF AMERICA BULLETIN 134.1-2(2022):223-240.
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