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Article: Deformation history of the Paleoproterozoic Liaohe assemblage in the Eastern block of the North China Craton

TitleDeformation history of the Paleoproterozoic Liaohe assemblage in the Eastern block of the North China Craton
Authors
KeywordsLiaohe assemblage
North China Craton
Paleoproterozoic
Regional deformation and metamorphism
Issue Date2005
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/jseaes
Citation
Journal Of Asian Earth Sciences, 2005, v. 24 n. 5 SPEC. ISS., p. 659-674 How to Cite?
AbstractThe Paleoproterozoic Liaohe assemblage and associated Liaoji granitoids represent the youngest basement in the Eastern Block of the North China Craton. Various structural elements and metamorphic reaction relations indicate that the Liaohe assemblage has experienced three distinct deformational events (D 1 to D 3) and four episodes of metamorphism (M 1 to M 4). The earliest greenschist facies event (M 1) is recognized in undeformed or weakly deformed domains wrapped by the S 1 schistosity, suggesting that M 1 occurred before D 1. The D 1 deformation produced small, mostly meter-scale, isoclinal and recumbent folds (F 1), an associated penetrative axial planar schistosity (S 1), a mineral stretching lineation (L 1) and regional-scale ductile shear zones. Concurrent with D 1 was M 2 metamorphism, which occurred before D 2 and produced low- to medium-pressure amphibolite facies assemblages. Regionally divergent motion senses reflected by the asymmetric F 1 folds and other sense-of-shear indicators, together with the radial distribution of the L 1 lineation surrounding the Liaoji granitoids, imply that D 1 represents an extensional event. The D 2 deformation produced open to tight F 2 folds of varying scales, S 2 axial crenulation cleavages and ENE-NE-striking thrust faults, involving broadly NW-SE compression. Following D 2 was M 3 metamorphism that led to the formation of sillimanite and cordierite in low-pressure type rocks and kyanite in medium-pressure rocks. The last deformational event (D 3) formed NW-WNW-trending folds (F 3), axial planar kink bands, spaced cleavages (S 3), and strike-slip and thrust faults, which deflect the earlier D 1 and D 2 structures. D 3 occurred at a shallow crustal level and was associated with, or followed by, a greenschist facies retrograde metamorphic event (M 4). The Liaohe assemblage and associated Liaoji granitoids are considered to have formed in a Paleoproterozoic rift, the late spreading of which led to the occurrence of the early extensional deformation (D 1) and the M 1 and M 2 metamorphism, and the final closing of which was associated with the D 2 and D 3 phases of deformation and M 3 and M 4 metamorphism. © 2004 Elsevier Ltd. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/72787
ISSN
2015 Impact Factor: 2.647
2015 SCImago Journal Rankings: 1.393
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorLi, Sen_HK
dc.contributor.authorZhao, Gen_HK
dc.contributor.authorSun, Men_HK
dc.contributor.authorHan, Zen_HK
dc.contributor.authorLuo, Yen_HK
dc.contributor.authorHao, Den_HK
dc.contributor.authorXia, Xen_HK
dc.date.accessioned2010-09-06T06:45:06Z-
dc.date.available2010-09-06T06:45:06Z-
dc.date.issued2005en_HK
dc.identifier.citationJournal Of Asian Earth Sciences, 2005, v. 24 n. 5 SPEC. ISS., p. 659-674en_HK
dc.identifier.issn1367-9120en_HK
dc.identifier.urihttp://hdl.handle.net/10722/72787-
dc.description.abstractThe Paleoproterozoic Liaohe assemblage and associated Liaoji granitoids represent the youngest basement in the Eastern Block of the North China Craton. Various structural elements and metamorphic reaction relations indicate that the Liaohe assemblage has experienced three distinct deformational events (D 1 to D 3) and four episodes of metamorphism (M 1 to M 4). The earliest greenschist facies event (M 1) is recognized in undeformed or weakly deformed domains wrapped by the S 1 schistosity, suggesting that M 1 occurred before D 1. The D 1 deformation produced small, mostly meter-scale, isoclinal and recumbent folds (F 1), an associated penetrative axial planar schistosity (S 1), a mineral stretching lineation (L 1) and regional-scale ductile shear zones. Concurrent with D 1 was M 2 metamorphism, which occurred before D 2 and produced low- to medium-pressure amphibolite facies assemblages. Regionally divergent motion senses reflected by the asymmetric F 1 folds and other sense-of-shear indicators, together with the radial distribution of the L 1 lineation surrounding the Liaoji granitoids, imply that D 1 represents an extensional event. The D 2 deformation produced open to tight F 2 folds of varying scales, S 2 axial crenulation cleavages and ENE-NE-striking thrust faults, involving broadly NW-SE compression. Following D 2 was M 3 metamorphism that led to the formation of sillimanite and cordierite in low-pressure type rocks and kyanite in medium-pressure rocks. The last deformational event (D 3) formed NW-WNW-trending folds (F 3), axial planar kink bands, spaced cleavages (S 3), and strike-slip and thrust faults, which deflect the earlier D 1 and D 2 structures. D 3 occurred at a shallow crustal level and was associated with, or followed by, a greenschist facies retrograde metamorphic event (M 4). The Liaohe assemblage and associated Liaoji granitoids are considered to have formed in a Paleoproterozoic rift, the late spreading of which led to the occurrence of the early extensional deformation (D 1) and the M 1 and M 2 metamorphism, and the final closing of which was associated with the D 2 and D 3 phases of deformation and M 3 and M 4 metamorphism. © 2004 Elsevier Ltd. All rights reserved.en_HK
dc.languageengen_HK
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/jseaesen_HK
dc.relation.ispartofJournal of Asian Earth Sciencesen_HK
dc.subjectLiaohe assemblageen_HK
dc.subjectNorth China Cratonen_HK
dc.subjectPaleoproterozoicen_HK
dc.subjectRegional deformation and metamorphismen_HK
dc.titleDeformation history of the Paleoproterozoic Liaohe assemblage in the Eastern block of the North China Cratonen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1367-9120&volume=24&issue=5&spage=659&epage=674&date=FEB&atitle=Deformation+history+of+the+Paleoproterozoic+Liaohe+assemblage+in+the+eastern+block+of+the+North+China+Cratonen_HK
dc.identifier.emailZhao, G: gzhao@hkucc.hku.hken_HK
dc.identifier.emailSun, M: minsun@hku.hken_HK
dc.identifier.emailXia, X: xpxia@hotmail.comen_HK
dc.identifier.authorityZhao, G=rp00842en_HK
dc.identifier.authoritySun, M=rp00780en_HK
dc.identifier.authorityXia, X=rp00815en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.jseaes.2003.11.008en_HK
dc.identifier.scopuseid_2-s2.0-14944359460en_HK
dc.identifier.hkuros108534en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-14944359460&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume24en_HK
dc.identifier.issue5 SPEC. ISS.en_HK
dc.identifier.spage659en_HK
dc.identifier.epage674en_HK
dc.identifier.isiWOS:000228247800010-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridLi, S=8784176300en_HK
dc.identifier.scopusauthoridZhao, G=7403296321en_HK
dc.identifier.scopusauthoridSun, M=25932315800en_HK
dc.identifier.scopusauthoridHan, Z=8284175100en_HK
dc.identifier.scopusauthoridLuo, Y=49161174100en_HK
dc.identifier.scopusauthoridHao, D=8620949400en_HK
dc.identifier.scopusauthoridXia, X=35241486400en_HK

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