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Occurrence of Nepouite in the Serpentinite of the Manipur Ophiolite Belt, Northeastern India: Implication for Melt-rock Interaction in a Supra-subduction Zone
THUNGYANI N OVUNG, , , DEBABRATA MANDAL, PALLAB DASGUPTA, MADHUPARNA PAUL
Published in SPRINGER INDIA
2017
Volume: 90
   
Issue: 2
Pages: 154 - 158
Abstract
Serpentinization is pervasive in the ultramafic rocks of Manipur ophiolite belt (MOB), Northeastern India. Electron microprobe data of a serpentinite from the Ukhrul-Nungbi sector of MOB shows Ni-rich serpentine mineral (NiO = 33.4-33.9 wt %, SiO2 = 37.55-38.96 wt %, MgO = 14.83-16.89 wt %). The composition and X-ray diffraction pattern characterize this Ni-rich serpentine mineral as nepouite which is suggested to be a hydrothermal alteration product of NiO-rich olivine in a fore-arc peridotite. The genesis of this NiO-rich olivine is attributed to the melt-rock interaction in a supra-subduction zone setting.
About the journal
JournalData powered by TypesetJournal of the Geological Society of India
PublisherData powered by TypesetSPRINGER INDIA
ISSN0016-7622
Open AccessNo