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Article: Petrogenesis of Jurassic granitoids at the northeastern margin of the North China Craton: New geochemical and geochronological constraints on subduction of the Paleo-Pacific Plate

TitlePetrogenesis of Jurassic granitoids at the northeastern margin of the North China Craton: New geochemical and geochronological constraints on subduction of the Paleo-Pacific Plate
Authors
KeywordsAdakitic granitoids
Jurassic
North China Craton
Northeast China
Paleo-Pacific Plate
Issue Date2018
Citation
Journal of Asian Earth Sciences, 2018, v. 158, p. 287-300 How to Cite?
AbstractAt the junction between the North China Craton (NCC) and the Central Asian Orogenic Belt (CAOB), northern Liaoning province, NE China, there are widespread Jurassic igneous rocks. The tectonic setting and petrogenesis of these rocks are unresolved. Zircon U–Pb dating, whole-rock geochemistry, and Hf isotopic compositions of Jurassic granitoids were investigated to constrain their ages and petrogenesis in order to understand the tectonic evolution of the Paleo-Pacific Ocean along the northeastern margin of the NCC. Geochronological data indicate that magmatism occurred between the early and late Jurassic (180–156 Ma). Despite the wide range in ages of the intrusions, Jurassic granitoids were likely derived from a similar or common source, as inferred from their geochemical and Hf isotopic characteristics. Compared to the island arc andesite-dacite-rhyolite series, the Jurassic granitoids are characterized by higher SiO2, Al2O3, and Sr contents, and lower MgO, FeOT, Y, and Yb contents, indicating that the primary magmas show typical characteristics of adakitic magmas derived from partial melting of thickened lower crust. These findings, combined with their εHf(t) values (+1.4 to +5.4) and two-stage model ages (1515–1165 Ma), indicate the primary magmas originated from partial melting of juvenile crustal material accreted during the Mesoproterozoic. They are enriched in large-ion lithophile elements (e.g., Rb, K, Th, Ba, and U) and light rare-earth elements (REE), and depleted in high-field-strength elements (e.g., Nb, Ta, Ti, and P) and heavy REE. Based on these findings and previous studies, we suggest that the Jurassic adakitic granitoids (180–156 Ma) were formed in an active continental margin and compressive tectonic setting, related to subduction of the Paleo-Pacific Plate.
Persistent Identifierhttp://hdl.handle.net/10722/327180
ISSN
2023 Impact Factor: 2.7
2023 SCImago Journal Rankings: 0.964
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorLiu, Jin-
dc.contributor.authorZhang, Jian-
dc.contributor.authorLiu, Zhenghong-
dc.contributor.authorYin, Changqing-
dc.contributor.authorZhao, Chen-
dc.contributor.authorPeng, Youbo-
dc.date.accessioned2023-03-31T05:29:32Z-
dc.date.available2023-03-31T05:29:32Z-
dc.date.issued2018-
dc.identifier.citationJournal of Asian Earth Sciences, 2018, v. 158, p. 287-300-
dc.identifier.issn1367-9120-
dc.identifier.urihttp://hdl.handle.net/10722/327180-
dc.description.abstractAt the junction between the North China Craton (NCC) and the Central Asian Orogenic Belt (CAOB), northern Liaoning province, NE China, there are widespread Jurassic igneous rocks. The tectonic setting and petrogenesis of these rocks are unresolved. Zircon U–Pb dating, whole-rock geochemistry, and Hf isotopic compositions of Jurassic granitoids were investigated to constrain their ages and petrogenesis in order to understand the tectonic evolution of the Paleo-Pacific Ocean along the northeastern margin of the NCC. Geochronological data indicate that magmatism occurred between the early and late Jurassic (180–156 Ma). Despite the wide range in ages of the intrusions, Jurassic granitoids were likely derived from a similar or common source, as inferred from their geochemical and Hf isotopic characteristics. Compared to the island arc andesite-dacite-rhyolite series, the Jurassic granitoids are characterized by higher SiO2, Al2O3, and Sr contents, and lower MgO, FeOT, Y, and Yb contents, indicating that the primary magmas show typical characteristics of adakitic magmas derived from partial melting of thickened lower crust. These findings, combined with their εHf(t) values (+1.4 to +5.4) and two-stage model ages (1515–1165 Ma), indicate the primary magmas originated from partial melting of juvenile crustal material accreted during the Mesoproterozoic. They are enriched in large-ion lithophile elements (e.g., Rb, K, Th, Ba, and U) and light rare-earth elements (REE), and depleted in high-field-strength elements (e.g., Nb, Ta, Ti, and P) and heavy REE. Based on these findings and previous studies, we suggest that the Jurassic adakitic granitoids (180–156 Ma) were formed in an active continental margin and compressive tectonic setting, related to subduction of the Paleo-Pacific Plate.-
dc.languageeng-
dc.relation.ispartofJournal of Asian Earth Sciences-
dc.subjectAdakitic granitoids-
dc.subjectJurassic-
dc.subjectNorth China Craton-
dc.subjectNortheast China-
dc.subjectPaleo-Pacific Plate-
dc.titlePetrogenesis of Jurassic granitoids at the northeastern margin of the North China Craton: New geochemical and geochronological constraints on subduction of the Paleo-Pacific Plate-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.jseaes.2018.03.006-
dc.identifier.scopuseid_2-s2.0-85043537548-
dc.identifier.volume158-
dc.identifier.spage287-
dc.identifier.epage300-
dc.identifier.isiWOS:000431469600020-

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