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Article: Geochemistry of ~2.5 Ga granitoids at the northern margin of the Yinshan Block: implications for the crustal evolution of the North China Craton

TitleGeochemistry of ~2.5 Ga granitoids at the northern margin of the Yinshan Block: implications for the crustal evolution of the North China Craton
Authors
KeywordsCrustal evolution
Geochemistry
Granitoids
Late Neoarchean-early Paleoproterozoic
North China Craton
Issue Date2017
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/precamres
Citation
Precambrian Research, 2017, v. 303, p. 673-686 How to Cite?
AbstractIn order to further constrain the crustal development and tectonic evolution of the North China Craton (NCC) during late Neoarchean to early Paleoproterozoic, we performed petrological and geochemical analyses on forty-six granitoid samples from the northern margin of the craton at Siziwangqi in central Inner Mongolia. The granitoids commonly consist of a tonalite-trondhjemite-granodiorite (TTG) suite and alkali feldspar (rich in potassium) granites. The geochemistry and isotopic characteristics suggest that they formed in a subduction-related arc setting. An Andean-type magmatic arc model is proposed to explain several unique geochemical features of the Siziwangqi granitoids, notably that the rocks are metaluminous to peraluminous and belong to the calc-alkaline (TTG) and subalkaline to alkaline (alkali feldspar granite) series. The TTG granitoids are characterized by light LREE enrichment, a weak positive Eu anomaly, and flat heavy HREE profiles. The alkali granite is also enriched in the LREE but has a strong positive chondrite-normalized Eu anomaly and displays weak HREE enrichment. Petrogenetic studies reveal that most samples are of I-type granitoids. The data further suggest that the subduction-induced magmatism and slab rollback processes may have triggered reworking of both juvenile arc crust and minor older continental crust material along the north margin of Yinshan Block, leading to the formation of granitoids from S- to I-type in the study area. Overall, the NCC experienced a tectonic regime that changed from compressional to extensional during the early Paleoproterozoic at ∼2.4 Ga, after the ca. 2.5 Ga cratonization event.
Persistent Identifierhttp://hdl.handle.net/10722/264074
ISSN
2017 Impact Factor: 3.907
2015 SCImago Journal Rankings: 3.214
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorChen, H-C-
dc.contributor.authorZhao, G-
dc.contributor.authorSun, M-
dc.contributor.authorZhou, H-
dc.date.accessioned2018-10-22T07:49:04Z-
dc.date.available2018-10-22T07:49:04Z-
dc.date.issued2017-
dc.identifier.citationPrecambrian Research, 2017, v. 303, p. 673-686-
dc.identifier.issn0301-9268-
dc.identifier.urihttp://hdl.handle.net/10722/264074-
dc.description.abstractIn order to further constrain the crustal development and tectonic evolution of the North China Craton (NCC) during late Neoarchean to early Paleoproterozoic, we performed petrological and geochemical analyses on forty-six granitoid samples from the northern margin of the craton at Siziwangqi in central Inner Mongolia. The granitoids commonly consist of a tonalite-trondhjemite-granodiorite (TTG) suite and alkali feldspar (rich in potassium) granites. The geochemistry and isotopic characteristics suggest that they formed in a subduction-related arc setting. An Andean-type magmatic arc model is proposed to explain several unique geochemical features of the Siziwangqi granitoids, notably that the rocks are metaluminous to peraluminous and belong to the calc-alkaline (TTG) and subalkaline to alkaline (alkali feldspar granite) series. The TTG granitoids are characterized by light LREE enrichment, a weak positive Eu anomaly, and flat heavy HREE profiles. The alkali granite is also enriched in the LREE but has a strong positive chondrite-normalized Eu anomaly and displays weak HREE enrichment. Petrogenetic studies reveal that most samples are of I-type granitoids. The data further suggest that the subduction-induced magmatism and slab rollback processes may have triggered reworking of both juvenile arc crust and minor older continental crust material along the north margin of Yinshan Block, leading to the formation of granitoids from S- to I-type in the study area. Overall, the NCC experienced a tectonic regime that changed from compressional to extensional during the early Paleoproterozoic at ∼2.4 Ga, after the ca. 2.5 Ga cratonization event.-
dc.languageeng-
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/precamres-
dc.relation.ispartofPrecambrian Research-
dc.subjectCrustal evolution-
dc.subjectGeochemistry-
dc.subjectGranitoids-
dc.subjectLate Neoarchean-early Paleoproterozoic-
dc.subjectNorth China Craton-
dc.titleGeochemistry of ~2.5 Ga granitoids at the northern margin of the Yinshan Block: implications for the crustal evolution of the North China Craton-
dc.typeArticle-
dc.identifier.emailZhao, G: gzhao@hku.hk-
dc.identifier.emailSun, M: minsun@hku.hk-
dc.identifier.authorityZhao, G=rp00842-
dc.identifier.authoritySun, M=rp00780-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.precamres.2017.08.022-
dc.identifier.scopuseid_2-s2.0-85028613400-
dc.identifier.hkuros294394-
dc.identifier.volume303-
dc.identifier.spage673-
dc.identifier.epage686-
dc.identifier.isiWOS:000423004300035-
dc.publisher.placeNetherlands-

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