Contact-metamorphic changes of coal at the Kayerkanskoye deposit

Abstract

At the Kayerkanskoye field, a comprehensive study of coal alteration of strata X and IX (Daldykan Formation P) at contacts with dolerite dikes was carried out to reveal the nature of the relationship between the scale of intrusions and near-contact zones of altered coal, as well as the features of contact-thermal metamorphism of coal. At different distances from the contacts with dikes, changes in the values of the main coal parameters were traced: ash content, volatile yield, caloric content, carbon content, specific gravity, reflectivity, microhardness.