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Article: Genetic links of magmatic deposits in the Emeishan large igneous province with the dynamics of a mantle plume

TitleGenetic links of magmatic deposits in the Emeishan large igneous province with the dynamics of a mantle plume
Authors
KeywordsDynamic Process
Magmatic Deposits
Mantle Plume
The Emeishan Igneous Province
Issue Date2005
Citation
Kuangwu Yanshi, 2005, v. 25 n. 4, p. 35-44 How to Cite?
Abstract
The Emeishan large igneous province in the western Yangtze Block was resulted from a mantle plume at end of the Middle Permian. Four super-large V-Ti-magnetite deposits and 10 large-medium Ni-Cu-(PGE) sulfide deposits have been explored in the Emeishan large igneous province. Precise age data indicated that these ore-bearing mafic-ultramafic intrusions were produced by the same mantle plume that caused the Emeishan flood basalts at 260 Ma±. The maficultramafic intrusion hosting V-Ti-magnetite deposits and Ni-Cu-(PGE) sulfide deposits are distinguished in localization, scale, rock-assemblages, components of rock-forming minerals. The Emeishan large province can be divided to Inner- and Outer-Zones. The Inner-Zone is marked by large thickness of the Emeishan flood basalts, large layered intrusions, mafic-ultrmafic intrusive bodies, low-Ti basalts, alkaline intrusions, and various mineralizations related to the mantle plume. The basalts become thinner and consist of high-Ti basalts in the Outer-Zone where fewer mafic-ultramafic bodies are exposed. Special and geochemical relationship between the two type of magmatic deposits and high- and low-Ti basalts,the study on petrogenetic links between the Ni-Cu-(PGE) sulfide deposits and the Emeishan flood basalts in the Yangliuping area indicate that the magmatic deposits formed in different dynamic stages of the mantle plume. The V-Ti-magnetite deposits are associated with the high-Ti basaltic magmas and related to fractional crystallization. In contrast, the Ni-Cu-(PGE) sulfide mineralization may be related to either the high- or low-Ti basaltic magmas and controlled by three factors: high degree partial melting of upper mantle, contamination of the lower crust, and fractional crystallization. The Ni-Cu-(PGE) sulfide deposits were formed earlier than the V-Ti-magnetite deposits.
Persistent Identifierhttp://hdl.handle.net/10722/151180
ISSN
2013 SCImago Journal Rankings: 0.162
References

 

Author Affiliations
  1. Institute of Geochemistry Chinese Academy of Sciences
  2. The University of Hong Kong
  3. Chengdu University of Technology
DC FieldValueLanguage
dc.contributor.authorSong, XYen_US
dc.contributor.authorZhang, CJen_US
dc.contributor.authorHu, RZen_US
dc.contributor.authorZhong, Hen_US
dc.contributor.authorZhou, MFen_US
dc.contributor.authorMa, RZen_US
dc.contributor.authorLi, YGen_US
dc.date.accessioned2012-06-26T06:18:19Z-
dc.date.available2012-06-26T06:18:19Z-
dc.date.issued2005en_US
dc.identifier.citationKuangwu Yanshi, 2005, v. 25 n. 4, p. 35-44en_US
dc.identifier.issn1001-6872en_US
dc.identifier.urihttp://hdl.handle.net/10722/151180-
dc.description.abstractThe Emeishan large igneous province in the western Yangtze Block was resulted from a mantle plume at end of the Middle Permian. Four super-large V-Ti-magnetite deposits and 10 large-medium Ni-Cu-(PGE) sulfide deposits have been explored in the Emeishan large igneous province. Precise age data indicated that these ore-bearing mafic-ultramafic intrusions were produced by the same mantle plume that caused the Emeishan flood basalts at 260 Ma±. The maficultramafic intrusion hosting V-Ti-magnetite deposits and Ni-Cu-(PGE) sulfide deposits are distinguished in localization, scale, rock-assemblages, components of rock-forming minerals. The Emeishan large province can be divided to Inner- and Outer-Zones. The Inner-Zone is marked by large thickness of the Emeishan flood basalts, large layered intrusions, mafic-ultrmafic intrusive bodies, low-Ti basalts, alkaline intrusions, and various mineralizations related to the mantle plume. The basalts become thinner and consist of high-Ti basalts in the Outer-Zone where fewer mafic-ultramafic bodies are exposed. Special and geochemical relationship between the two type of magmatic deposits and high- and low-Ti basalts,the study on petrogenetic links between the Ni-Cu-(PGE) sulfide deposits and the Emeishan flood basalts in the Yangliuping area indicate that the magmatic deposits formed in different dynamic stages of the mantle plume. The V-Ti-magnetite deposits are associated with the high-Ti basaltic magmas and related to fractional crystallization. In contrast, the Ni-Cu-(PGE) sulfide mineralization may be related to either the high- or low-Ti basaltic magmas and controlled by three factors: high degree partial melting of upper mantle, contamination of the lower crust, and fractional crystallization. The Ni-Cu-(PGE) sulfide deposits were formed earlier than the V-Ti-magnetite deposits.en_US
dc.languageengen_US
dc.relation.ispartofKuangwu Yanshien_US
dc.subjectDynamic Processen_US
dc.subjectMagmatic Depositsen_US
dc.subjectMantle Plumeen_US
dc.subjectThe Emeishan Igneous Provinceen_US
dc.titleGenetic links of magmatic deposits in the Emeishan large igneous province with the dynamics of a mantle plumeen_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.scopuseid_2-s2.0-33644825937en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-33644825937&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume25en_US
dc.identifier.issue4en_US
dc.identifier.spage35en_US
dc.identifier.epage44en_US
dc.identifier.scopusauthoridSong, XY=7402269092en_US
dc.identifier.scopusauthoridZhang, CJ=7405496025en_US
dc.identifier.scopusauthoridHu, RZ=7202640800en_US
dc.identifier.scopusauthoridZhong, H=35785435900en_US
dc.identifier.scopusauthoridZhou, MF=7403506005en_US
dc.identifier.scopusauthoridMa, RZ=8723972900en_US
dc.identifier.scopusauthoridLi, YG=8291300900en_US

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