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dc.contributor.authorWang, Wei
dc.contributor.authorLiu, Shuwen
dc.contributor.authorCawood, Peter A.
dc.contributor.authorGuo, Rongrong
dc.contributor.authorBai, Xiang
dc.contributor.authorGuo, Boran
dc.date.accessioned2018-06-13T23:32:17Z
dc.date.available2018-06-13T23:32:17Z
dc.date.issued2017-12
dc.identifier.citationWang , W , Liu , S , Cawood , P A , Guo , R , Bai , X & Guo , B 2017 , ' Late Neoarchean crust-mantle geodynamics : evidence from Pingquan Complex of the Northern Hebei Province, North China Craton ' , Precambrian Research , vol. 303 , pp. 470-493 . https://doi.org/10.1016/j.precamres.2017.06.007en
dc.identifier.issn0301-9268
dc.identifier.otherPURE: 250268714
dc.identifier.otherPURE UUID: fbdfbbca-5967-4503-b77f-32338a18f141
dc.identifier.otherRIS: urn:D8DEBD7D2C0C5CAAF43A0F4568C3DC90
dc.identifier.otherScopus: 85021314823
dc.identifier.otherWOS: 000423004300025
dc.identifier.urihttp://hdl.handle.net/10023/14031
dc.descriptionThis study is financially supported by the National Natural Science Foundation of China (Grant Nos. 41530207, 41502179, 41472165, 41602198) and Central University Basic Scientific Research Business Expenses (Grant No. 2652015038). PAC acknowledges support from Australian Research Council grant FL160100168.en
dc.description.abstractA late Neoarchean intra-oceanic arc along the northwestern margin of Eastern Block (EB), North China Craton, provides important insights into the nature of Archean mantle sources and crust-mantle geodynamics. The Pingquan Complex and the entire Northern Hebei Province (NHB) are located in the middle part of the arc, and overlap the northern extent of the Trans-North China Orogen. Zircon U-Pb isotopic age data reveal that the Pingquan Complex consists of ∼2537-2515 Ma dioritic gneisses, ∼2506-2503 Ma amphibolites, and ∼2491 Ma quartz monzodioritic to monzogranitic gneisses, and they show dominantly positive zircon εHf(t) (-0.6-+5.4) that are lower than coeval model depleted mantle values. Geochemical data for the Pingquan rocks and synchronous metabasalts and granitoid gneisses of Huai’an-Xuanhua and Dantazi complexes in the NHB are integrated. Except for the monzogranitic gneisses that were derived from partial melting of juvenile metagreywackes, the other rocks of the Pingquan Complex were derived from a metasomatized lithospheric mantle, and subjected to variable fractionation of clinopyroxene, hornblende and plagioclase, without significant crustal contamination. Moderately depleted zircon εHf(t), and high Sm/Hf and Nb/Ta (mostly of 1.34-3.96 and 15.50-32.58) suggest that the lithospheric mantle was enriched by subducted pelagic sediments metamorphosed to rutile-bearing eclogites before melting. Late Neoarchean crust-mantle geodynamic processes in the NHB are reconstructed. Intra-oceanic subduction initiated offshore of the northwestern margin of the EB at ∼2.55 Ga or earlier. Partial melting of slab basalts occurred at ∼2542-2499 Ma, with the melts contaminated by mantle wedge materials forming TTGs. Meanwhile, the sub-arc lithospheric mantle was enriched by fluids and melts released from slab basalts and pelagic sediments, and partial melting of this moderately depleted mantle generated ∼2537-2503 Ma diorites and basalts. Following final accretion of the arc onto the continental margin of the EB, the slab rollback/breakoff and asthenospheric mantle upwelling triggered partial melting of the metasomatized lithospheric mantle and crustal anatexis, generating ∼2491 Ma quartz monzodioritic and monzogranitic rocks. Accordingly, the NHB records Neoarchean crustal growth linked to oceanic subduction and arc-continent accretion, and highlights the importance of resolving the nature of mantle sources and crust-mantle interactions in understanding Archean crustal growth and evolution.
dc.language.isoeng
dc.relation.ispartofPrecambrian Researchen
dc.rights© 2017 Elsevier Ltd. All rights reserved. This work has been made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://doi.org/en
dc.subjectLate Neoarchean crustal growthen
dc.subjectSediment recycling and crust-mantle interactionen
dc.subjectArc-continent accretionen
dc.subjectPingquan Complex of Northern Hebei Provinceen
dc.subjectNorth China Cratonen
dc.subjectGE Environmental Sciencesen
dc.subjectQE Geologyen
dc.subjectDASen
dc.subject.lccGEen
dc.subject.lccQEen
dc.titleLate Neoarchean crust-mantle geodynamics : evidence from Pingquan Complex of the Northern Hebei Province, North China Cratonen
dc.typeJournal articleen
dc.description.versionPostprinten
dc.contributor.institutionUniversity of St Andrews.School of Geography and Geosciencesen
dc.contributor.institutionUniversity of St Andrews.School of Earth & Environmental Sciencesen
dc.contributor.institutionUniversity of St Andrews.Scottish Oceans Instituteen
dc.contributor.institutionUniversity of St Andrews.St Andrews Isotope Geochemistryen
dc.identifier.doihttps://doi.org/10.1016/j.precamres.2017.06.007
dc.description.statusPeer revieweden
dc.date.embargoedUntil2018-06-13


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