Pb. Maithani et al., YTTRIUM-RICH, NIOBIUM-RICH AND ZIRCONIUM-RICH RHYOLITE DYKES OF DHORIO-NES AREA, DISTRICT JAMNAGAR, GUJARAT, INDIA, Current Science, 69(3), 1995, pp. 270-272
Anomalously high contents of Nb (818 ppm), La (173 ppm), Y (305 ppm) a
nd Zr (> 1000 ppm) are reported for the first time in the rhyolite dyk
es/veins spatially associated with the Deccan basalts in Alech hills a
round Dhorio Nes, district Jamnagar, Gujarat. The enrichment of these
elements is due to influx of alkalies and volatiles in rhyolites empla
ced along the western continuity of E-W-trending Son-Narmada rift.