MODE OF OCCURRENCE OF PYRITE IN THE TERTIARY COALS OF KALAKUT, METKA AND MAHOGALA COALFIELDS OF JAMMU, JAMMU AND KASHMIR

摘要

This study presents the results of microscopic study of pyrite in the high sulphur coals of Jammu. A quantitative examination of morphological forms of pyrite has been carried out along with their approximate size measurement. The study shows that framboidal pyrite (of 5 to 60 mm) ranges in concentration from 5 to 49 percent, cavity fillings (12 to 300 mm) from 6 to 60 percent, fissure and cleat fillings front 0 to 4 percent, disseminated pyrite from 10 to 25 percent, discrete grains (4 to 18 mm) from 11 to 50 percent and massive replacement from 0 to 20 percent. An effort has also been made to demonstrate the basinal distribution of pyrite forms with respect to size.