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dc.contributor.authorBanerjee, R.
dc.contributor.authorRay, Dwijesh
dc.contributor.authorIshii, T.
dc.date.accessioned2015-10-26T09:14:05Z
dc.date.available2015-10-26T09:14:05Z
dc.date.issued2015
dc.identifier.citationJournal Geological Society of India, vol.86(1); 2015; 41-51
dc.identifier.urihttp://drs.nio.org/drs/handle/2264/4810
dc.description.abstractSerpentinites (frequently cross cut by gabbroic dikelet), collected from Northern Central Indian Ridge (NCIR), Indian Ocean, contain both Cr-rich (Group I) and Cr-poor (Group II) variety of spinel. Based on mineralogy they can be classified as non-residual and residual spinel, respectively. While, non residual spinel (TiO<sub>2</sub> up to 0.5 wt %; Group I) display the evidences of peridotite-gabbro interaction, residual spinel (TiO<sub>2</sub><0.1 wt%; Cr# ~24; Group II), suggests intermediate degree of partial melting (~10%) of mantle peridotite, which falls between most depleted mantle peridotite (~15%) and most fertile peridotite (~5%). Alteration of spinel porphyroclast is conceded by the presence of relict fresh interior, intermediate ferritchromit zone and secondary magnetite at the margins. Due to the effect of serpentinisation, marginal areas of spinel porphyroclasts display increasing Fe, but decreasing Al and Mg, while their Cr content remains unaffected throughout the spinel
dc.language.isoen
dc.publisherGeological Society of India
dc.rightsCopyright [2015]. All efforts have been made to respect the copyright to the best of our knowledge. Inadvertent omissions, if brought to our notice, stand for correction and withdrawal of document from this repository.
dc.subjectGEOLOGY AND GEOPHYSICS
dc.subjectCHEMISTRY AND BIOGEOCHEMISTRY
dc.subjectAQUATIC RESOURCES
dc.titleMineral chemistry and alteration characteristics of spinel in serpentinised peridotites from the northern central Indian Ridge
dc.typeJournal Article


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