Olivine compositional mapping of mafic-ultramafic complexes in eastern Xinjiang (NW China): Implications for Cu-Ni mineralization and tectonic dynamics

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dc.contributor.authorSu, B.
dc.contributor.authorQin, K.
dc.contributor.authorSun, H.
dc.contributor.authorTang, D.
dc.contributor.authorXiao, Q.
dc.contributor.authorLiu, P.
dc.contributor.authorSakyi, P.A.
dc.date.accessioned2019-01-21T10:33:22Z
dc.date.available2019-01-21T10:33:22Z
dc.date.issued2012-02
dc.description.abstractEarly Permian mafic-ultramafic complexes in eastern Xinjiang (Chinese source) are mainly distributed in the Beishan (Chinese source) area, Mid-Tianshan (Chinese source) massif and Jueluotage (Chinese source) belt. Systematic compositional mapping of olivines from these Early Permian mafic-ultramafic complexes demonstrates that an apparently spatial distribution and heterogeneous partial melting in the mantle source exists from the Beishan area, across the Mid-Tianshan massif, to the Jueluotage belt from the south to the north. This is probably consistent with the spatial evolutional differences and tectonic features of these three belts. The decreasing degree of partial melting, as revealed by decreasing Fo contents of olivines, from south to north and from east to west reflects the southward subduction of the Paleo-Asian Ocean and the south location of the indistinct mantle plume in the Permian. Simultaneously, NiO and Fo-mapping in olivine also indicates that sulfide segregation before olivine crystallization played an important role in Ni-Cu mineralization in the mafic-ultramafic complexes. Olivines with the compositional range of Fo (77-86) and NiO (less than 0.22 wt.%) are more favorable for Ni-Cu sulfide mineralization. © 2012 China University of Geosciences and Springer-Verlag Berlin Heidelberg.en_US
dc.identifier.citationSu, B., Qin, K., Sun, H. et al. J. Earth Sci. (2012) 23: 41. https://doi.org/10.1007/s12583-012-0232-yen_US
dc.identifier.otherVolume 23, Issue 1, pp 41–53
dc.identifier.otherhttps://doi.org/10.1007/s12583-012-0232-y
dc.identifier.urihttp://ugspace.ug.edu.gh/handle/123456789/26935
dc.language.isoenen_US
dc.publisherJournal of Earth Scienceen_US
dc.subjectBeishanen_US
dc.subjectJueluotage belten_US
dc.subjectmafic-ultramafic complexen_US
dc.subjectMid-Tianshan massifen_US
dc.subjectNi-Cu sulfide mineralizationen_US
dc.subjectolivine compositional mappingen_US
dc.titleOlivine compositional mapping of mafic-ultramafic complexes in eastern Xinjiang (NW China): Implications for Cu-Ni mineralization and tectonic dynamicsen_US
dc.typeArticleen_US

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