Ampbibolites of the Marutha Gold Prospect in the Precambrian High-Grade Terrain of South India

At Marutha, located in the high-grade granulite terrain of South India, gold in association with pyrite and chalcopyrite occurs along the contacts of quartz veins with amphibolite. Structures of the area were produced during two deformational events. Gold-bearing quartz veins were formed before the onset of second deformational event. Amphibolite of Marutha, geochemically comparable with the metavolcanics of Kolar and Hutti, is derived from low-K-tholeiitic basalt and has no komatiitic affinity. Tholeiitic basalt is the probable source of gold at Marutha.