THE GRANITOIDS OF PINDAR-SARJU-RAMGANGA AND GORIGANGA VALLEYS OF HIGHER KUMAUN-HIMALAYA

In the Higher Kumaun Himalaya granitoids are widely distributed and oc cur as bands, lenses or sheet-like bodies. They include different vari eties of gneissic granites (schistose, foliated, augen and porphyrobla stic). The field, petrographic as well as chemical data indicate that the granitoids of Kumaun Higher Himalaya are formed due to metasomatic transformation of metasediments by alkali-rich emanations. The geoche mistry of these reveal their calc-alkaline, peraluminous, S-type natur e and compositionally mainly represent granite. Trace elements discrim inate the granitoids in the syn-collisional environment.