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Article: Ultra-high pressure minerals in the Luobusa Ophiolite, Tibet, and their tectonic implications

TitleUltra-high pressure minerals in the Luobusa Ophiolite, Tibet, and their tectonic implications
Authors
Issue Date2004
PublisherGeological Society Publishing House. The Journal's web site is located at http://www.geolsoc.org.uk/sp
Citation
Geological Society Special Publication, 2004, v. 226, p. 247-271 How to Cite?
AbstractNumerous ultra-high-pressure minerals have been recovered from podiform chromitites in the Luobusa ophiolite, Tibet. Recovered minerals include diamond, moissanite, Fe-silicides, wüstite, Ni-Fe-Cr-C alloys, PGE alloys and octahedral Mg-Fe silicates. These are accompanied by a variety of native elements, including Si, Fe, Ni, Cr and graphite. All of the minerals were hand-picked from heavy-mineral separates of the chromitites and care was taken to prevent natural or anthropogenic contamination of the samples. Many of the minerals and alloys are either enclosed in, or attached to, chromite grains, leaving no doubt as to their provenance. The ophiolite formed originally at a mid-ocean ridge (MOR) spreading centre at 177±33 Ma, and was later modified by suprasubduction zone magmatism at about 126 Ma. The chromitites were formed in the suprasubduction zone environment from boninitic melts reacting with the host peridotites. The UHP minerals are believed to have been transported from the lower mantle by a plume and incorporated in the ophiolite during seafloor spreading at 176 Ma. Blocks of the mantle containing the UHP minerals were presumably picked up by the later boninitic melts, transported to shallow depth and incorporated in the chromitites during crystallization. © The Geological Society of London 2004.
Persistent Identifierhttp://hdl.handle.net/10722/151268
ISSN
2015 SCImago Journal Rankings: 0.747
References

 

DC FieldValueLanguage
dc.contributor.authorRobinson, PTen_HK
dc.contributor.authorBai, WJen_HK
dc.contributor.authorMalpas, Jen_HK
dc.contributor.authorYang, JSen_HK
dc.contributor.authorZhou, MFen_HK
dc.contributor.authorFang, QSen_HK
dc.contributor.authorHu, XFen_HK
dc.contributor.authorCameron, Sen_HK
dc.contributor.authorStaudigel, Hen_HK
dc.date.accessioned2012-06-26T06:19:43Z-
dc.date.available2012-06-26T06:19:43Z-
dc.date.issued2004en_HK
dc.identifier.citationGeological Society Special Publication, 2004, v. 226, p. 247-271en_HK
dc.identifier.issn0305-8719en_HK
dc.identifier.urihttp://hdl.handle.net/10722/151268-
dc.description.abstractNumerous ultra-high-pressure minerals have been recovered from podiform chromitites in the Luobusa ophiolite, Tibet. Recovered minerals include diamond, moissanite, Fe-silicides, wüstite, Ni-Fe-Cr-C alloys, PGE alloys and octahedral Mg-Fe silicates. These are accompanied by a variety of native elements, including Si, Fe, Ni, Cr and graphite. All of the minerals were hand-picked from heavy-mineral separates of the chromitites and care was taken to prevent natural or anthropogenic contamination of the samples. Many of the minerals and alloys are either enclosed in, or attached to, chromite grains, leaving no doubt as to their provenance. The ophiolite formed originally at a mid-ocean ridge (MOR) spreading centre at 177±33 Ma, and was later modified by suprasubduction zone magmatism at about 126 Ma. The chromitites were formed in the suprasubduction zone environment from boninitic melts reacting with the host peridotites. The UHP minerals are believed to have been transported from the lower mantle by a plume and incorporated in the ophiolite during seafloor spreading at 176 Ma. Blocks of the mantle containing the UHP minerals were presumably picked up by the later boninitic melts, transported to shallow depth and incorporated in the chromitites during crystallization. © The Geological Society of London 2004.en_HK
dc.languageengen_US
dc.publisherGeological Society Publishing House. The Journal's web site is located at http://www.geolsoc.org.uk/spen_HK
dc.relation.ispartofGeological Society Special Publicationen_HK
dc.titleUltra-high pressure minerals in the Luobusa Ophiolite, Tibet, and their tectonic implicationsen_HK
dc.typeArticleen_HK
dc.identifier.emailMalpas, J: jgmalpas@hku.hken_HK
dc.identifier.emailZhou, MF: mfzhou@hkucc.hku.hken_HK
dc.identifier.authorityMalpas, J=rp00059en_HK
dc.identifier.authorityZhou, MF=rp00844en_HK
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1144/GSL.SP.2004.226.01.14en_HK
dc.identifier.scopuseid_2-s2.0-5544306579en_HK
dc.identifier.hkuros93744-
dc.identifier.hkuros108959-
dc.identifier.hkuros111506-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-5544306579&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume226en_HK
dc.identifier.spage247en_HK
dc.identifier.epage271en_HK
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridRobinson, PT=7403720506en_HK
dc.identifier.scopusauthoridBai, WJ=9271474700en_HK
dc.identifier.scopusauthoridMalpas, J=7006136845en_HK
dc.identifier.scopusauthoridYang, JS=49061676200en_HK
dc.identifier.scopusauthoridZhou, MF=7403506005en_HK
dc.identifier.scopusauthoridFang, QS=7202644200en_HK
dc.identifier.scopusauthoridHu, XF=7404710867en_HK
dc.identifier.scopusauthoridCameron, S=52163097800en_HK
dc.identifier.scopusauthoridStaudigel, H=7003773594en_HK

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