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Article: Quantitative P-T-X constraints on orthopyroxene-bearing high-pressure granulites in felsic-metapelitic rocks: Evidence from the Huangtuling granulite, Dabieshan Orogen

TitleQuantitative P-T-X constraints on orthopyroxene-bearing high-pressure granulites in felsic-metapelitic rocks: Evidence from the Huangtuling granulite, Dabieshan Orogen
Authors
KeywordsHigh-pressure granulite
NCKFMASHTOsystem
Orthopyroxene
P-T-X pseudosections
Issue Date2008
PublisherWiley-Blackwell Publishing Ltd. The Journal's web site is located at http://www.wiley.com/bw/journal.asp?ref=0263-4929
Citation
Journal Of Metamorphic Geology, 2008, v. 26 n. 1, p. 1-15 How to Cite?
AbstractHigh-pressure granulites are generally characterized by the absence of orthopyroxene. However, orthopyroxene is reported in a few high-pressure, felsic-metapelitic granulites, such as the Huangtuling felsic high-pressure granulite in the North Dabie metamorphic core complex in east-central China, which rarely preserves the high-pressure granulite facies assemblage of garnet+orthopyroxene+biotite+plagioclase+K-feldspar+quartz. To investigate the effects of bulk-rock composition on the stability of orthopyroxene-bearing, high-pressure granulite facies assemblages in the NCKFMASHTO (Na 2O-CaO-K 2O-FeO-MgO-Al 2 O 3-SiO 2-H 2O-TiO 2- Fe 2O 3) system, a series of P-T-X pseudosections based on the melt-reintegrated composition of the Huangtuling felsic high-pressure granulite were constructed. Calculations demonstrate that the orthopyroxene-bearing, high-pressure granulite facies assemblages are restricted to low X Al [Al 2O 3/(Na 2O + CaO + K 2O + FeO + MgO + Al 2O 3) < 0.35, mole proportion] or high X Mg [MgO/(MgO + FeO) > 0.85] felsic-metapelitic rock types. This study also reveals that the X Al values in the residual felsic-metapelitic, high-pressure granulites could be significantly reduced by a high proportion of melt loss. We suggest that orthopyroxene-bearing, high-pressure granulites occur in residual overthickened crustal basement under continental subduction-collision zones and arc-continent collision belts. © 2007 Blackwell Publishing Ltd.
Persistent Identifierhttp://hdl.handle.net/10722/72871
ISSN
2015 Impact Factor: 3.673
2015 SCImago Journal Rankings: 3.397
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorChen, Yen_HK
dc.contributor.authorYe, Ken_HK
dc.contributor.authorLiu, JBen_HK
dc.contributor.authorSun, Men_HK
dc.date.accessioned2010-09-06T06:45:53Z-
dc.date.available2010-09-06T06:45:53Z-
dc.date.issued2008en_HK
dc.identifier.citationJournal Of Metamorphic Geology, 2008, v. 26 n. 1, p. 1-15en_HK
dc.identifier.issn0263-4929en_HK
dc.identifier.urihttp://hdl.handle.net/10722/72871-
dc.description.abstractHigh-pressure granulites are generally characterized by the absence of orthopyroxene. However, orthopyroxene is reported in a few high-pressure, felsic-metapelitic granulites, such as the Huangtuling felsic high-pressure granulite in the North Dabie metamorphic core complex in east-central China, which rarely preserves the high-pressure granulite facies assemblage of garnet+orthopyroxene+biotite+plagioclase+K-feldspar+quartz. To investigate the effects of bulk-rock composition on the stability of orthopyroxene-bearing, high-pressure granulite facies assemblages in the NCKFMASHTO (Na 2O-CaO-K 2O-FeO-MgO-Al 2 O 3-SiO 2-H 2O-TiO 2- Fe 2O 3) system, a series of P-T-X pseudosections based on the melt-reintegrated composition of the Huangtuling felsic high-pressure granulite were constructed. Calculations demonstrate that the orthopyroxene-bearing, high-pressure granulite facies assemblages are restricted to low X Al [Al 2O 3/(Na 2O + CaO + K 2O + FeO + MgO + Al 2O 3) < 0.35, mole proportion] or high X Mg [MgO/(MgO + FeO) > 0.85] felsic-metapelitic rock types. This study also reveals that the X Al values in the residual felsic-metapelitic, high-pressure granulites could be significantly reduced by a high proportion of melt loss. We suggest that orthopyroxene-bearing, high-pressure granulites occur in residual overthickened crustal basement under continental subduction-collision zones and arc-continent collision belts. © 2007 Blackwell Publishing Ltd.en_HK
dc.languageengen_HK
dc.publisherWiley-Blackwell Publishing Ltd. The Journal's web site is located at http://www.wiley.com/bw/journal.asp?ref=0263-4929en_HK
dc.relation.ispartofJournal of Metamorphic Geologyen_HK
dc.rightsJournal of Metamorphic Geology. Copyright © Blackwell Publishing Ltd.en_HK
dc.subjectHigh-pressure granuliteen_HK
dc.subjectNCKFMASHTOsystemen_HK
dc.subjectOrthopyroxeneen_HK
dc.subjectP-T-X pseudosectionsen_HK
dc.titleQuantitative P-T-X constraints on orthopyroxene-bearing high-pressure granulites in felsic-metapelitic rocks: Evidence from the Huangtuling granulite, Dabieshan Orogenen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0263-4929&volume=26&spage=1&epage=15&date=2008&atitle=Quantitative+P-T-X+constraints+on+orthopyroxene-bearing+high-pressure+granulites+in+felsic-metapelitic+rocks:+evidence+from+the+Huangtuling+granulite,+Dabieshan+Orogen.en_HK
dc.identifier.emailSun, M:minsun@hku.hken_HK
dc.identifier.authoritySun, M=rp00780en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1111/j.1525-1314.2007.00742.xen_HK
dc.identifier.scopuseid_2-s2.0-37549010987en_HK
dc.identifier.hkuros144174en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-37549010987&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume26en_HK
dc.identifier.issue1en_HK
dc.identifier.spage1en_HK
dc.identifier.epage15en_HK
dc.identifier.isiWOS:000251811300001-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridChen, Y=7601427514en_HK
dc.identifier.scopusauthoridYe, K=7102173832en_HK
dc.identifier.scopusauthoridLiu, JB=35201627800en_HK
dc.identifier.scopusauthoridSun, M=25932315800en_HK
dc.identifier.citeulike2161906-

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