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Article: The applicability of garnet-orthopyroxene geobarometry in mantle xenoliths

TitleThe applicability of garnet-orthopyroxene geobarometry in mantle xenoliths
Authors
KeywordsAccuracy
Garnet
Geobarometer
Mantle xenolith
Orthopyroxene
Precision
Issue Date2011
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/lithos
Citation
Lithos, 2011, v. 125 n. 1-2, p. 1-9 How to Cite?
AbstractThe various existing garnet-orthopyroxene geobarometers calibrated based on the Al2O3 or Cr2O3 components in orthopyroxene buffered by coexisting garnet for mantle xenoliths, abbreviated as Al2O3-barometer and Cr2O3-barometer, respectively, have been extensively studied, to test their precision by applying them to phase equilibrium experimental data, and to evaluate their validity by applying them to natural pyrolites. The Cr2O3-barometers failed in reconstructing the experimental pressures due to imprecise description of activities of garnet and orthopyroxene end members. Several of the Al2O3-barometers showed perfect ability in reproducing the experimental pressures and successfully discerned the garnet-facies and garnet-spinel transition facies lherzolites as well as the graphite- or diamond-bearing mantle xenoliths. It is recommended that pressure and temperature estimation of mantle xenoliths may be best determined simultaneously by combining the garnet-orthopyroxene barometer and the two-pyroxene thermometer of Taylor (1998). Orthopyroxenes containing Al2O3 contents of less than 0.37wt.% should not be used in the pressure estimation in order to avoid significant P-T errors propagated from analytical errors. © 2011 Elsevier B.V.
Persistent Identifierhttp://hdl.handle.net/10722/139170
ISSN
2015 Impact Factor: 3.723
2015 SCImago Journal Rankings: 2.920
ISI Accession Number ID
Funding AgencyGrant Number
Chinese Academy of SciencesXMXX280734
National Natural Science Foundation of China40872125
40730315
Funding Information:

Professor Erling J.K. Ravna and an anonymous referee carefully revised both the science and the English of the original manuscript. This work was supported by the Knowledge Innovation Program of the Chinese Academy of Sciences (XMXX280734) and the National Natural Science Foundation of China (40872125, 40730315). This paper is dedicated to Professor Qihan Shen, member of the Chinese Academy of Sciences, in honor of his ninetieth birthday.

References

 

DC FieldValueLanguage
dc.contributor.authorWu, CMen_HK
dc.contributor.authorZhao, Gen_HK
dc.date.accessioned2011-09-23T05:46:19Z-
dc.date.available2011-09-23T05:46:19Z-
dc.date.issued2011en_HK
dc.identifier.citationLithos, 2011, v. 125 n. 1-2, p. 1-9en_HK
dc.identifier.issn0024-4937en_HK
dc.identifier.urihttp://hdl.handle.net/10722/139170-
dc.description.abstractThe various existing garnet-orthopyroxene geobarometers calibrated based on the Al2O3 or Cr2O3 components in orthopyroxene buffered by coexisting garnet for mantle xenoliths, abbreviated as Al2O3-barometer and Cr2O3-barometer, respectively, have been extensively studied, to test their precision by applying them to phase equilibrium experimental data, and to evaluate their validity by applying them to natural pyrolites. The Cr2O3-barometers failed in reconstructing the experimental pressures due to imprecise description of activities of garnet and orthopyroxene end members. Several of the Al2O3-barometers showed perfect ability in reproducing the experimental pressures and successfully discerned the garnet-facies and garnet-spinel transition facies lherzolites as well as the graphite- or diamond-bearing mantle xenoliths. It is recommended that pressure and temperature estimation of mantle xenoliths may be best determined simultaneously by combining the garnet-orthopyroxene barometer and the two-pyroxene thermometer of Taylor (1998). Orthopyroxenes containing Al2O3 contents of less than 0.37wt.% should not be used in the pressure estimation in order to avoid significant P-T errors propagated from analytical errors. © 2011 Elsevier B.V.en_HK
dc.languageengen_US
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/lithosen_HK
dc.relation.ispartofLithosen_HK
dc.subjectAccuracyen_HK
dc.subjectGarneten_HK
dc.subjectGeobarometeren_HK
dc.subjectMantle xenolithen_HK
dc.subjectOrthopyroxeneen_HK
dc.subjectPrecisionen_HK
dc.titleThe applicability of garnet-orthopyroxene geobarometry in mantle xenolithsen_HK
dc.typeArticleen_HK
dc.identifier.emailZhao, G:gzhao@hkucc.hku.hken_HK
dc.identifier.authorityZhao, G=rp00842en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.lithos.2011.02.018en_HK
dc.identifier.scopuseid_2-s2.0-79958800760en_HK
dc.identifier.hkuros193877en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-79958800760&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume125en_HK
dc.identifier.issue1-2en_HK
dc.identifier.spage1en_HK
dc.identifier.epage9en_HK
dc.identifier.isiWOS:000292663600001-
dc.publisher.placeNetherlandsen_HK
dc.identifier.scopusauthoridWu, CM=37032960800en_HK
dc.identifier.scopusauthoridZhao, G=7403296321en_HK
dc.identifier.citeulike8984266-

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