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Article: Abundant Fe-Ti oxide inclusions in olivine from the Panzhihua and Hongge layered intrusions, SW China: Evidence for early saturation of Fe-Ti oxides in ferrobasaltic magma

TitleAbundant Fe-Ti oxide inclusions in olivine from the Panzhihua and Hongge layered intrusions, SW China: Evidence for early saturation of Fe-Ti oxides in ferrobasaltic magma
Authors
KeywordsFe-Ti Oxides
Hongge
Inclusion
Layered Intrusion
Panzhihua
Sw China
Issue Date2008
PublisherSpringer Verlag. The Journal's web site is located at http://link.springer.de/link/service/journals/00410/index.htm
Citation
Contributions To Mineralogy And Petrology, 2008, v. 156 n. 3, p. 307-321 How to Cite?
AbstractAbundant Fe-Ti oxide inclusions in cumulus olivine (Fo77-81) from the Panzhihua and Hongge intrusions, Emeishan large igneous province, SW China, document the first evidence for early crystallization of Fe-Ti oxides in ferrobasaltic systems in nature. The intrusions also contain significant stratiform Fe-Ti-V oxide ores. The oxide inclusions are sub-rounded or irregular, range from ∼5 to 50 μm in diameter, and are dominated by either titanomagnetite or ilmenite. The fact that the inclusions are either titanomagnetite- or ilmenite-dominant suggests that they are trapped crystals, instead of immiscible oxide melt, formed during growth of the host olivine. The absence of other silicate phases in the inclusion-bearing olivine is difficult to reconcile with a possible xenocrystic origin of the oxide inclusions. These oxide inclusions are thus interpreted to be cumulus minerals crystallized together and trapped in olivine from the same parental magma. In addition to Fe-Ti oxides, some inclusions contain amphibole + biotite ± fluorapatite that might have formed by reaction of trapped hydrous liquid with the host olivine. Numerical modeling of high-Ti Emeishan basalts using the MELTS program successfully simulates early crystallization of olivine (∼Fo81) and Fe-Ti spinel in the presence of a moderate amount of H2O (∼1.5 wt%) under pressure and fO2 conditions generally pertinent to the Panzhihua and Hongge intrusions. The modal mineralogy of the oxide inclusions is in good agreement with the bulk compositions of the ore, as inferred from whole-rock data, in a given intrusion. This is consistent with the interpretation that the stratiform oxide ores in the intrusions formed by accumulation of Fe-Ti oxide crystals that appeared on the liquidus with olivine and clinopyroxene. © Springer-Verlag 2008.
Persistent Identifierhttp://hdl.handle.net/10722/151250
ISSN
2014 Impact Factor: 3.484
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorPang, KNen_US
dc.contributor.authorLi, Cen_US
dc.contributor.authorZhou, MFen_US
dc.contributor.authorRipley, EMen_US
dc.date.accessioned2012-06-26T06:19:18Z-
dc.date.available2012-06-26T06:19:18Z-
dc.date.issued2008en_US
dc.identifier.citationContributions To Mineralogy And Petrology, 2008, v. 156 n. 3, p. 307-321en_US
dc.identifier.issn0010-7999en_US
dc.identifier.urihttp://hdl.handle.net/10722/151250-
dc.description.abstractAbundant Fe-Ti oxide inclusions in cumulus olivine (Fo77-81) from the Panzhihua and Hongge intrusions, Emeishan large igneous province, SW China, document the first evidence for early crystallization of Fe-Ti oxides in ferrobasaltic systems in nature. The intrusions also contain significant stratiform Fe-Ti-V oxide ores. The oxide inclusions are sub-rounded or irregular, range from ∼5 to 50 μm in diameter, and are dominated by either titanomagnetite or ilmenite. The fact that the inclusions are either titanomagnetite- or ilmenite-dominant suggests that they are trapped crystals, instead of immiscible oxide melt, formed during growth of the host olivine. The absence of other silicate phases in the inclusion-bearing olivine is difficult to reconcile with a possible xenocrystic origin of the oxide inclusions. These oxide inclusions are thus interpreted to be cumulus minerals crystallized together and trapped in olivine from the same parental magma. In addition to Fe-Ti oxides, some inclusions contain amphibole + biotite ± fluorapatite that might have formed by reaction of trapped hydrous liquid with the host olivine. Numerical modeling of high-Ti Emeishan basalts using the MELTS program successfully simulates early crystallization of olivine (∼Fo81) and Fe-Ti spinel in the presence of a moderate amount of H2O (∼1.5 wt%) under pressure and fO2 conditions generally pertinent to the Panzhihua and Hongge intrusions. The modal mineralogy of the oxide inclusions is in good agreement with the bulk compositions of the ore, as inferred from whole-rock data, in a given intrusion. This is consistent with the interpretation that the stratiform oxide ores in the intrusions formed by accumulation of Fe-Ti oxide crystals that appeared on the liquidus with olivine and clinopyroxene. © Springer-Verlag 2008.en_US
dc.languageengen_US
dc.publisherSpringer Verlag. The Journal's web site is located at http://link.springer.de/link/service/journals/00410/index.htmen_US
dc.relation.ispartofContributions to Mineralogy and Petrologyen_US
dc.subjectFe-Ti Oxidesen_US
dc.subjectHonggeen_US
dc.subjectInclusionen_US
dc.subjectLayered Intrusionen_US
dc.subjectPanzhihuaen_US
dc.subjectSw Chinaen_US
dc.titleAbundant Fe-Ti oxide inclusions in olivine from the Panzhihua and Hongge layered intrusions, SW China: Evidence for early saturation of Fe-Ti oxides in ferrobasaltic magmaen_US
dc.typeArticleen_US
dc.identifier.emailZhou, MF: mfzhou@hkucc.hku.hken_US
dc.identifier.authorityZhou, MF=rp00844en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1007/s00410-008-0287-zen_US
dc.identifier.scopuseid_2-s2.0-47949124490en_US
dc.identifier.hkuros153179-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-47949124490&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume156en_US
dc.identifier.issue3en_US
dc.identifier.spage307en_US
dc.identifier.epage321en_US
dc.identifier.isiWOS:000257721200003-
dc.publisher.placeGermanyen_US
dc.identifier.scopusauthoridPang, KN=23493522200en_US
dc.identifier.scopusauthoridLi, C=8092856900en_US
dc.identifier.scopusauthoridZhou, MF=7403506005en_US
dc.identifier.scopusauthoridRipley, EM=7007165825en_US
dc.identifier.citeulike3114751-

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