THE ASSOCIATION OF HYPERSOLVUS-SUBSOLVUS GRANITES - A STUDY OF MALANIIGNEOUS SUITE, INDIA

Detailed field, petrographical and the chemical studies of the Jalor g ranites, Western Rajasthan show that the Jalor magmatism is not exclus ively peraluminous in nature but has peralkaline component closely ass ociated in space and time. The Jalor complex is a classic example of h ypersolvus-subsolvus granite association. The similar abundances of tr ace elements such is Ba, Th, U, Ga, Y and Zr in the hypersolvus and th e subsolvus granites suggest that both magmas have common source and a re coeval. The hypersolvus granites show enrichment of LREE as compare d to the subsolvus granites, but the subsolvus granites have more pron ounced Eu anomaly. Tectonic significance of the find is also discussed .