dc.contributor.author | Banerjee, R. | |
dc.contributor.author | Ray, Dwijesh | |
dc.contributor.author | Ishii, T. | |
dc.date.accessioned | 2015-10-26T09:14:05Z | |
dc.date.available | 2015-10-26T09:14:05Z | |
dc.date.issued | 2015 | |
dc.identifier.citation | Journal Geological Society of India, vol.86(1); 2015; 41-51 | |
dc.identifier.uri | http://drs.nio.org/drs/handle/2264/4810 | |
dc.description.abstract | Serpentinites (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.iso | en | |
dc.publisher | Geological Society of India | |
dc.rights | Copyright [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.subject | GEOLOGY AND GEOPHYSICS | |
dc.subject | CHEMISTRY AND BIOGEOCHEMISTRY | |
dc.subject | AQUATIC RESOURCES | |
dc.title | Mineral chemistry and alteration characteristics of spinel in serpentinised peridotites from the northern central Indian Ridge | |
dc.type | Journal Article | |