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Article: The applicability of the GRIPS geobarometry in metapelitic assemblages

TitleThe applicability of the GRIPS geobarometry in metapelitic assemblages
Authors
KeywordsApplicability
Calibration
Geobarometer
GRIPS
Metapelite
Issue Date2006
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, 2006, v. 24 n. 4, p. 297-307 How to Cite?
AbstractAlthough the garnet-rutile-ilmenite-plagioclase-silica (quartz) (GRIPS) geobarometer has been experimentally calibrated and widely applied, its applicability to metapelitic rocks has not yet been discussed carefully. In this paper, this barometer was recalibrated by fitting the available reversed-phase equilibrium data incorporating different combinations of activity models of garnet, plagioclase and ilmenite. The resultant GRIPS barometer formalisms reproduce the experimental pressures well within ± 0.2 kbar. The GRIPS and garnet-aluminium silicate-plagioclase-quartz (GASP) barometer values are concordant within ± 1 kbar for pressures above ∼ 6 kbar for natural metapelites, but the difference of pressure determinations between these two barometers becomes larger when pressure and/or the grossular content of garnet decrease. However, the pressure difference is independent of ither temperature, or almandine in garnet, or anorthite in plagioclase, or iron content in ilmenite. After testing and application of the GRIPS barometer to aluminosilicate-bearing metapelites and metapelitic assemblages within limited geographical areas as well as within contact thermal aureoles, it is concluded that this barometer may be applied to low- to high-grade, medium- to high-pressure metapelites. The application of the GRIPS barometer to metapelites is not advocated in situations where calcium is deficient in garnet (XCa grt < 0.05) or plagioclase (XCa pl < 0.17), or for pressures below ∼ 6 kbar. © 2006 Blackwell Publishing Ltd.
Persistent Identifierhttp://hdl.handle.net/10722/72709
ISSN
2015 Impact Factor: 3.673
2015 SCImago Journal Rankings: 3.397
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorWu, CMen_HK
dc.contributor.authorZhao, GCen_HK
dc.date.accessioned2010-09-06T06:44:22Z-
dc.date.available2010-09-06T06:44:22Z-
dc.date.issued2006en_HK
dc.identifier.citationJournal Of Metamorphic Geology, 2006, v. 24 n. 4, p. 297-307en_HK
dc.identifier.issn0263-4929en_HK
dc.identifier.urihttp://hdl.handle.net/10722/72709-
dc.description.abstractAlthough the garnet-rutile-ilmenite-plagioclase-silica (quartz) (GRIPS) geobarometer has been experimentally calibrated and widely applied, its applicability to metapelitic rocks has not yet been discussed carefully. In this paper, this barometer was recalibrated by fitting the available reversed-phase equilibrium data incorporating different combinations of activity models of garnet, plagioclase and ilmenite. The resultant GRIPS barometer formalisms reproduce the experimental pressures well within ± 0.2 kbar. The GRIPS and garnet-aluminium silicate-plagioclase-quartz (GASP) barometer values are concordant within ± 1 kbar for pressures above ∼ 6 kbar for natural metapelites, but the difference of pressure determinations between these two barometers becomes larger when pressure and/or the grossular content of garnet decrease. However, the pressure difference is independent of ither temperature, or almandine in garnet, or anorthite in plagioclase, or iron content in ilmenite. After testing and application of the GRIPS barometer to aluminosilicate-bearing metapelites and metapelitic assemblages within limited geographical areas as well as within contact thermal aureoles, it is concluded that this barometer may be applied to low- to high-grade, medium- to high-pressure metapelites. The application of the GRIPS barometer to metapelites is not advocated in situations where calcium is deficient in garnet (XCa grt < 0.05) or plagioclase (XCa pl < 0.17), or for pressures below ∼ 6 kbar. © 2006 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.rightsThe definitive version is available at www3.interscience.wiley.comen_HK
dc.subjectApplicabilityen_HK
dc.subjectCalibrationen_HK
dc.subjectGeobarometeren_HK
dc.subjectGRIPSen_HK
dc.subjectMetapeliteen_HK
dc.titleThe applicability of the GRIPS geobarometry in metapelitic assemblagesen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0263-4929&volume=24&issue=4&spage=297&epage=307&date=MAY&atitle=The+applicability+of+the+GRIPS+geobarometry+in+metapelitic+assemblagesen_HK
dc.identifier.emailZhao, GC:gzhao@hkucc.hku.hken_HK
dc.identifier.authorityZhao, GC=rp00842en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1111/j.1525-1314.2006.00638.xen_HK
dc.identifier.scopuseid_2-s2.0-33646258978en_HK
dc.identifier.hkuros122047en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-33646258978&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume24en_HK
dc.identifier.issue4en_HK
dc.identifier.spage297en_HK
dc.identifier.epage307en_HK
dc.identifier.isiWOS:000237299500002-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridWu, CM=37046380900en_HK
dc.identifier.scopusauthoridZhao, GC=7403296321en_HK
dc.identifier.citeulike614178-

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