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Article: Archean blocks and their boundaries in the North China Craton: Lithological, geochemical, structural and P-T path constraints and tectonic evolution

TitleArchean blocks and their boundaries in the North China Craton: Lithological, geochemical, structural and P-T path constraints and tectonic evolution
Authors
KeywordsArchean
Collision
Mantle plumes
North China Craton
Paleoproterozoic
Issue Date2001
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/precamres
Citation
Precambrian Research, 2001, v. 107 n. 1-2, p. 45-73 How to Cite?
AbstractAn examination of lithological, geochemical, geochronological, structural and metamorphic P-T path data suggests that the basement of the North China Craton can be divided into Eastern and Western Blocks, separated by major crustal boundaries that roughly correspond with the limits of a 300 km wide zone, called the Trans-North China Orogen. The Eastern Block consists predominantly of Late Archean domiform tonalitic-trondhjemitic-granodioritic (TTG) batholiths surrounded by anastomosing networks and linear belts of open to tight synforms of minor volcanic and sedimentary rocks metamorphosed from greenschist to granulite facies at ∼ 2.5 Ga, with anticlockwise P-T paths. Some Early to Middle Archean rocks are locally present in the Eastern Block, but their tectonic history is unclear due to reworking by the 2.5 Ga tectonothermal event. The Western Block has a Late Archean assemblage, structural style and metamorphic history similar to that of the Eastern Block, but it differs in the absence of early to middle Archean assemblages and in being overlain by and interleaved with Paleoproterozoic khondalites, which were affected by a ∼ 1.8 Ga metamorphic event involving clockwise P-T paths. A mantle plume model is proposed for the formation and evolution of Late Archean basement rocks in the Eastern and Western Blocks based on a combination of extensive exposure of TTG gneisses, affinities of mafic rocks to continental tholeiitic basalts, presence of voluminous komatiitic rocks, dominant diaprism-related domiform structures, anticlockwise P-T paths, and a short time span from the primary emplacement of TTG and ultramafic to mafic rocks until the onset of regional metamorphism. Between the two blocks is the Trans-North China Orogen which is bounded by two major fault systems and is composed of Late Archean to Paleoproterozoic TTG gneisses and granitoids, interleaved with abundant sedimentary and volcanic rocks that are geochemically interpreted as having developed in magmatic arc and intra-arc basin environments. These rocks underwent multiple phases of compressional deformation and peak high-pressure metamorphism followed by rapid exhumation during the Late Paleoproterozoic at ∼ 1.8 Ga as a result of collision between the Eastern and Western Blocks, resulting in the amalgamation of the North China Craton. © 2001 Elsevier Science B.V.
Persistent Identifierhttp://hdl.handle.net/10722/72550
ISSN
2015 Impact Factor: 4.037
2015 SCImago Journal Rankings: 3.214
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorZhao, Gen_HK
dc.contributor.authorWilde, SAen_HK
dc.contributor.authorCawood, PAen_HK
dc.contributor.authorSun, Men_HK
dc.date.accessioned2010-09-06T06:42:53Z-
dc.date.available2010-09-06T06:42:53Z-
dc.date.issued2001en_HK
dc.identifier.citationPrecambrian Research, 2001, v. 107 n. 1-2, p. 45-73en_HK
dc.identifier.issn0301-9268en_HK
dc.identifier.urihttp://hdl.handle.net/10722/72550-
dc.description.abstractAn examination of lithological, geochemical, geochronological, structural and metamorphic P-T path data suggests that the basement of the North China Craton can be divided into Eastern and Western Blocks, separated by major crustal boundaries that roughly correspond with the limits of a 300 km wide zone, called the Trans-North China Orogen. The Eastern Block consists predominantly of Late Archean domiform tonalitic-trondhjemitic-granodioritic (TTG) batholiths surrounded by anastomosing networks and linear belts of open to tight synforms of minor volcanic and sedimentary rocks metamorphosed from greenschist to granulite facies at ∼ 2.5 Ga, with anticlockwise P-T paths. Some Early to Middle Archean rocks are locally present in the Eastern Block, but their tectonic history is unclear due to reworking by the 2.5 Ga tectonothermal event. The Western Block has a Late Archean assemblage, structural style and metamorphic history similar to that of the Eastern Block, but it differs in the absence of early to middle Archean assemblages and in being overlain by and interleaved with Paleoproterozoic khondalites, which were affected by a ∼ 1.8 Ga metamorphic event involving clockwise P-T paths. A mantle plume model is proposed for the formation and evolution of Late Archean basement rocks in the Eastern and Western Blocks based on a combination of extensive exposure of TTG gneisses, affinities of mafic rocks to continental tholeiitic basalts, presence of voluminous komatiitic rocks, dominant diaprism-related domiform structures, anticlockwise P-T paths, and a short time span from the primary emplacement of TTG and ultramafic to mafic rocks until the onset of regional metamorphism. Between the two blocks is the Trans-North China Orogen which is bounded by two major fault systems and is composed of Late Archean to Paleoproterozoic TTG gneisses and granitoids, interleaved with abundant sedimentary and volcanic rocks that are geochemically interpreted as having developed in magmatic arc and intra-arc basin environments. These rocks underwent multiple phases of compressional deformation and peak high-pressure metamorphism followed by rapid exhumation during the Late Paleoproterozoic at ∼ 1.8 Ga as a result of collision between the Eastern and Western Blocks, resulting in the amalgamation of the North China Craton. © 2001 Elsevier Science B.V.en_HK
dc.languageengen_HK
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/precamresen_HK
dc.relation.ispartofPrecambrian Researchen_HK
dc.rightsPrecambrian Research. Copyright © Elsevier BV.en_HK
dc.subjectArcheanen_HK
dc.subjectCollisionen_HK
dc.subjectMantle plumesen_HK
dc.subjectNorth China Cratonen_HK
dc.subjectPaleoproterozoicen_HK
dc.titleArchean blocks and their boundaries in the North China Craton: Lithological, geochemical, structural and P-T path constraints and tectonic evolutionen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0301-9268&volume=107&spage=45&epage=73&date=2001&atitle=Archean+blocks+and+their+boundaries+in+the+North+China+Craton:+lithological,+geochemical,+structural+and+P-T+path+constraints+and+tectonic+evolution.+en_HK
dc.identifier.emailZhao, G:gzhao@hkucc.hku.hken_HK
dc.identifier.emailSun, M:minsun@hku.hken_HK
dc.identifier.authorityZhao, G=rp00842en_HK
dc.identifier.authoritySun, M=rp00780en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/S0301-9268(00)00154-6en_HK
dc.identifier.scopuseid_2-s2.0-0035970734en_HK
dc.identifier.hkuros73234en_HK
dc.identifier.hkuros57271-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0035970734&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume107en_HK
dc.identifier.issue1-2en_HK
dc.identifier.spage45en_HK
dc.identifier.epage73en_HK
dc.identifier.isiWOS:000167596800004-
dc.publisher.placeNetherlandsen_HK
dc.identifier.scopusauthoridZhao, G=7403296321en_HK
dc.identifier.scopusauthoridWilde, SA=35254758600en_HK
dc.identifier.scopusauthoridCawood, PA=7004146041en_HK
dc.identifier.scopusauthoridSun, M=25932315800en_HK

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