D. Asthana et al., INTERSTRATIFIED LOW-TI AND HIGH-TI VOLCANICS IN ARC-RELATED KHAIRAGARH GROUP OF CENTRAL INDIA, Current Science, 71(4), 1996, pp. 304-306
We report here the petrotectonic implications of interstratified low-T
i and high-Ti volcanics in the Khairagarh metabasalts of Sitagota Sync
line, Central India. The low-Ti volcanics have higher CaO/TiO2, Al2O3/
TiO2, ratios and LILE (?), LREE, Zr, Hf, and Cr concentration and dist
inct negative Eu anomalies, and lower FeOT/MgO, P, V, Sc, HREE than hi
gh-Ti volcanics, Although low-Ti and high-Ti volcanics are both arc-re
lated tholeiites, they are not related to each other by crystal fracti
onation and/or crustal contamination processes, They represent differe
nt degrees of partial melting of heterogeneous mantle source under dif
ferent subduction fluxes, P-H2O and fo(2) conditions.