Rare earth element geochemistry of selected mafic-ultramafic units from Singhbhum Craton: Implications to source heterogeneity

A. Roy, A. Sarkar, S. K. Bhattacharya, H. Ozaki, M. Ebihara

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Modelling of REE data indicates that while mafic rocks of Dhanjori Group are partial melting products of a spinel Iherzolite source, Dalma ultrabasics are the residue after the melt-extraction from an original garnet Iherzolite rock. Ultramafics of Newer dolente dykes indicate either derivation by mantle meta somatism or effect of post magmatic serpentinisation. REE data in conjunction with the available geochronological data suggest that significant mantle heterogeneity existed over relatively smaller distances (∼100 km) even during Proterozoic and that the mantle evolved in a non-uniform manner with distinct localised processes.

Original languageEnglish
Pages (from-to)717-726
Number of pages10
JournalJournal of the Geological Society of India
Volume50
Issue number6
Publication statusPublished - 1997 Dec 1
Externally publishedYes

Keywords

  • Mantle Heterogeneity
  • REE Geochemistry
  • Singhbhum Craton

ASJC Scopus subject areas

  • Geology

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