PETROCHEMISTRY OF THE EASTERN PART OF PIPARAN GRANITE, DODA DISTRICT,JAMMU LESSER HIMALAYA

Piparan Granite batholith, in the southwest of Pir Panjal, Jammu Lesse r Himalaya, is exposed within the Older Metamorphics (Precambrian). Th e granite is leuco- to mesocratic composed of quartz (32%), perthitic K-feldspar (27%), plagioclase An(13-28) (23%), micas (13%), garnet, ap atite, zircon and ilmenite (8%). It is of two mica. monzogranitic comp osition. Its major and trace element concentrations are comparable to the avenge crustal granite. The differentiation of the rock favours a normal trend with a positive correlation of alkalies and a negative tr end of magnesium against silica. The granite is S-type (ilmenite serie s) and peraluminous, produced as a result of syntectonic crustal anate ctic process at a temperature range of 650 degrees-690 degrees C, 3-5 kb P-H2O and at a depth of approximately 20-30 km.