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Conference Paper: Fe-Ti-Cr oxides from the Permian Xinjie mafic-ultramafic layered intrusion in the Emeishan large igneous province, SW China: Crystallization from Fe- and Ti-rich basaltic magmas

TitleFe-Ti-Cr oxides from the Permian Xinjie mafic-ultramafic layered intrusion in the Emeishan large igneous province, SW China: Crystallization from Fe- and Ti-rich basaltic magmas
Authors
KeywordsChromite
Fe-Ti oxides
Mineral chemistry
Petrogenesis
SW China
Xinjie intrusion
Issue Date2008
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/lithos
Citation
International Conference on Continental Volcanism. In Lithos, 2008, v. 102 n. 1-2, p. 198-217 How to Cite?
AbstractThe ∼ 260 Ma Xinjie mafic-ultramafic intrusion in the Emeishan large igneous province, SW China, is a sill-like body hosting Fe-Ti-Cr oxide mineralization. The intrusion comprises, from the base upward, a marginal zone and three cyclic zones. Fe-Ti oxides (magnetite and ilmenite) are disseminated throughout the intrusion and the oxide mineralization includes several Fe-Ti oxide-rich layers. The oxides in the lower parts of cyclic zones I and II are associated with variable amounts of ferrichromite with abundant ilmenite lamellae, indicating crystallization from Fe- and Ti-rich silicate magma. The Fe-Ti oxides contain relatively high Cr2O3 contents, which decrease upward in the sequence, consistent with formation by crystallization from silicate magma in a closed system. In the lower parts of Zones I and II, chromite grains are enclosed in olivine, whereas magnetite and ilmenite grains are enclosed in either clinopyroxene or plagioclase. Magnetite and ilmenite are also interstitial to olivine. The textural relationships of the minerals suggest that the Fe-Ti oxides may have crystallized slightly later than chromite and olivine but slightly earlier than clinopyroxene and plagioclase. Therefore, two parallel crystallization series may have developed at the same time: chromite → Fe-Ti solid solution and olivine → clinopyroxene → plagioclase. In this way Fe-Ti oxide grains can be both interstitial to early formed olivine and enclosed in later-formed clinopyroxene and plagioclase. This explains the unusual association of chromite with Fe-Ti oxides in the lower part of the sequence. © 2007 Elsevier B.V. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/72451
ISSN
2015 Impact Factor: 3.723
2015 SCImago Journal Rankings: 2.920
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorWang, CYen_HK
dc.contributor.authorZhou, MFen_HK
dc.contributor.authorZhao, Den_HK
dc.date.accessioned2010-09-06T06:41:57Z-
dc.date.available2010-09-06T06:41:57Z-
dc.date.issued2008en_HK
dc.identifier.citationInternational Conference on Continental Volcanism. In Lithos, 2008, v. 102 n. 1-2, p. 198-217en_HK
dc.identifier.issn0024-4937en_HK
dc.identifier.urihttp://hdl.handle.net/10722/72451-
dc.description.abstractThe ∼ 260 Ma Xinjie mafic-ultramafic intrusion in the Emeishan large igneous province, SW China, is a sill-like body hosting Fe-Ti-Cr oxide mineralization. The intrusion comprises, from the base upward, a marginal zone and three cyclic zones. Fe-Ti oxides (magnetite and ilmenite) are disseminated throughout the intrusion and the oxide mineralization includes several Fe-Ti oxide-rich layers. The oxides in the lower parts of cyclic zones I and II are associated with variable amounts of ferrichromite with abundant ilmenite lamellae, indicating crystallization from Fe- and Ti-rich silicate magma. The Fe-Ti oxides contain relatively high Cr2O3 contents, which decrease upward in the sequence, consistent with formation by crystallization from silicate magma in a closed system. In the lower parts of Zones I and II, chromite grains are enclosed in olivine, whereas magnetite and ilmenite grains are enclosed in either clinopyroxene or plagioclase. Magnetite and ilmenite are also interstitial to olivine. The textural relationships of the minerals suggest that the Fe-Ti oxides may have crystallized slightly later than chromite and olivine but slightly earlier than clinopyroxene and plagioclase. Therefore, two parallel crystallization series may have developed at the same time: chromite → Fe-Ti solid solution and olivine → clinopyroxene → plagioclase. In this way Fe-Ti oxide grains can be both interstitial to early formed olivine and enclosed in later-formed clinopyroxene and plagioclase. This explains the unusual association of chromite with Fe-Ti oxides in the lower part of the sequence. © 2007 Elsevier B.V. All rights reserved.en_HK
dc.languageengen_HK
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/lithosen_HK
dc.relation.ispartofLithosen_HK
dc.subjectChromiteen_HK
dc.subjectFe-Ti oxidesen_HK
dc.subjectMineral chemistryen_HK
dc.subjectPetrogenesisen_HK
dc.subjectSW Chinaen_HK
dc.subjectXinjie intrusionen_HK
dc.titleFe-Ti-Cr oxides from the Permian Xinjie mafic-ultramafic layered intrusion in the Emeishan large igneous province, SW China: Crystallization from Fe- and Ti-rich basaltic magmasen_HK
dc.typeConference_Paperen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0024-4937&volume=102&issue=1-2&spage=198&epage=217&date=2008&atitle=Fe-Ti-Cr+oxides+from+the+Permian+Xinjie+mafic-ultramafic+layered+intrusion+in+the+Emeishan+large+igneous+province,+SW+China:+Crystallization+from+Fe-+and+Ti-rich+basaltic+magmas-
dc.identifier.emailZhou, MF:mfzhou@hkucc.hku.hken_HK
dc.identifier.authorityZhou, MF=rp00844en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.lithos.2007.08.007en_HK
dc.identifier.scopuseid_2-s2.0-41349101110en_HK
dc.identifier.hkuros167280en_HK
dc.identifier.hkuros144282-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-41349101110&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume102en_HK
dc.identifier.issue1-2en_HK
dc.identifier.spage198en_HK
dc.identifier.epage217en_HK
dc.identifier.isiWOS:000255605500012-
dc.publisher.placeNetherlandsen_HK
dc.identifier.scopusauthoridWang, CY=34976092700en_HK
dc.identifier.scopusauthoridZhou, MF=7403506005en_HK
dc.identifier.scopusauthoridZhao, D=36509465000en_HK

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