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Article: Recalibration of the garnet-muscovite (GM) geothermometer and the garnet-muscovite-plagioclase-quartz (GMPQ) geobarometer for metapelitic assemblages

TitleRecalibration of the garnet-muscovite (GM) geothermometer and the garnet-muscovite-plagioclase-quartz (GMPQ) geobarometer for metapelitic assemblages
Authors
KeywordsApplication
Calibration
Geobarometer
Geothermometer
Metapelite
Issue Date2006
PublisherOxford University Press. The Journal's web site is located at http://petrology.oxfordjournals.org/
Citation
Journal Of Petrology, 2006, v. 47 n. 12, p. 2357-2368 How to Cite?
AbstractThe garnet-muscovite (GM) geothermometer and the garnet-muscovite-plagioclase-quartz (GMPQ) geobarometer have been simultaneously calibrated under conditions of T = 450-760°C and P = 0.8-11.1 kbar, using a large number of metapelitic samples in the compositional ranges XFe grt= 0.53-0.81, XMg grt = 0.05-0.24, XCa grt =0.03-0.23 in garnet, XCa pl = 0.17-0.74 in plagioclase, and Fe = 0.04-0.16, Mg = 0.04-0.13, AlVI =1.74-1.96 in muscovite on the basis of 11 oxygens. The resulting GM thermometer yielded similar temperature estimates (mostly within ±50°C) to that of the garnet-biotite thermometer, and successfully discerned the expected systematic temperature change of prograde sequences, thermal contact zones and an inverted metamorphic zone. The resulting GMPQ barometer yielded similar pressure estimates (mostly within ±1.0 kbar) to the garnet-aluminum silicate-plagioclase-quartz (GASP) barometer and placed the aluminosilicate-bearing samples in the appropriate aluminosilicate stability fields. Application of the GMPQ barometer to thermal contact aureoles or rocks within limited geographical areas confirmed the expected constant pressures that should exist in these settings. The random errors of the GM thermometer and the GMPQ barometer are estimated to be ±16°C and ±1.5 kbar, respectively. When biotite or aluminosilicate is absent in metapelites, metamorphic P-T conditions may be determined by simultaneously applying the GM thermometer and the GMPQ barometer. © 2006 Oxford University Press.
Persistent Identifierhttp://hdl.handle.net/10722/72567
ISSN
2015 Impact Factor: 3.768
2015 SCImago Journal Rankings: 2.992
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorWu, CMen_HK
dc.contributor.authorZhao, Gen_HK
dc.date.accessioned2010-09-06T06:43:03Z-
dc.date.available2010-09-06T06:43:03Z-
dc.date.issued2006en_HK
dc.identifier.citationJournal Of Petrology, 2006, v. 47 n. 12, p. 2357-2368en_HK
dc.identifier.issn0022-3530en_HK
dc.identifier.urihttp://hdl.handle.net/10722/72567-
dc.description.abstractThe garnet-muscovite (GM) geothermometer and the garnet-muscovite-plagioclase-quartz (GMPQ) geobarometer have been simultaneously calibrated under conditions of T = 450-760°C and P = 0.8-11.1 kbar, using a large number of metapelitic samples in the compositional ranges XFe grt= 0.53-0.81, XMg grt = 0.05-0.24, XCa grt =0.03-0.23 in garnet, XCa pl = 0.17-0.74 in plagioclase, and Fe = 0.04-0.16, Mg = 0.04-0.13, AlVI =1.74-1.96 in muscovite on the basis of 11 oxygens. The resulting GM thermometer yielded similar temperature estimates (mostly within ±50°C) to that of the garnet-biotite thermometer, and successfully discerned the expected systematic temperature change of prograde sequences, thermal contact zones and an inverted metamorphic zone. The resulting GMPQ barometer yielded similar pressure estimates (mostly within ±1.0 kbar) to the garnet-aluminum silicate-plagioclase-quartz (GASP) barometer and placed the aluminosilicate-bearing samples in the appropriate aluminosilicate stability fields. Application of the GMPQ barometer to thermal contact aureoles or rocks within limited geographical areas confirmed the expected constant pressures that should exist in these settings. The random errors of the GM thermometer and the GMPQ barometer are estimated to be ±16°C and ±1.5 kbar, respectively. When biotite or aluminosilicate is absent in metapelites, metamorphic P-T conditions may be determined by simultaneously applying the GM thermometer and the GMPQ barometer. © 2006 Oxford University Press.en_HK
dc.languageengen_HK
dc.publisherOxford University Press. The Journal's web site is located at http://petrology.oxfordjournals.org/en_HK
dc.relation.ispartofJournal of Petrologyen_HK
dc.subjectApplicationen_HK
dc.subjectCalibrationen_HK
dc.subjectGeobarometeren_HK
dc.subjectGeothermometeren_HK
dc.subjectMetapeliteen_HK
dc.titleRecalibration of the garnet-muscovite (GM) geothermometer and the garnet-muscovite-plagioclase-quartz (GMPQ) geobarometer for metapelitic assemblagesen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0022-3530&volume=47&issue=12&spage=2357&epage=2368&date=DEC&atitle=Recalibration+of+the+Garnet+−+Muscovite+(GM)+Geothermometer+and+the+Garnet+−+Muscovite+−+Plagioclase+−+Quartz+(GMPQ)+Geobarometer+for+Metapelitic+Assemblagesen_HK
dc.identifier.emailZhao, G:gzhao@hkucc.hku.hken_HK
dc.identifier.authorityZhao, G=rp00842en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1093/petrology/egl047en_HK
dc.identifier.scopuseid_2-s2.0-33845982618en_HK
dc.identifier.hkuros127555en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-33845982618&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume47en_HK
dc.identifier.issue12en_HK
dc.identifier.spage2357en_HK
dc.identifier.epage2368en_HK
dc.identifier.isiWOS:000242771300004-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridWu, CM=7501664637en_HK
dc.identifier.scopusauthoridZhao, G=7403296321en_HK
dc.identifier.citeulike968640-

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