INTERSTRATIFIED LOW-TI AND HIGH-TI VOLCANICS IN ARC-RELATED KHAIRAGARH GROUP OF CENTRAL INDIA

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.