Incidence of Molybdenite in the Crystalline Limestone of Ghansali formation at Thayeli Area, Tehri District, Uttaranchal

Molybdenite occurs as veins and fracture fillings in the crystalline limestone patches that occur with in quartzite of Ghansali Formation at Thayeli area in the Bhillangana valley, Tehri district. The limestone contains anomalous quantities of trace elements like Ba, Sr, Cu, Mo, U and Th. The mineralogy, trace element chemistry and geological setting of the crystalline limestone patches reveal that the limestone has under gone contact metamorphism into a skarn due to intrusion of the chirpatiyakhal granite.