ХОЙД ЭЛДЭВИЙН ОРДЫН НҮҮРСНИЙ ПЕТРОГРАФИЙН НАЙРЛАГА, ЧАНАРЫН СУДАЛГАА

Abstract

North-Eldev coal deposit is located in ChoirNyalga coal-bearing basin of the eastern Mongolia. Coal seams are hosted in middle Jurassic sediments. This study presents geological setting, deposit coal quality and petrograph study of North Eldev coal deposit. The results show that the coal of North Eldev deposit composed of three microlitotypes including 74.6-94.0% vitrinite, 1.5-12.5% inertinite, 0.1-1.8% liptinite and of 0.6-13.5% inorganic matters. Vitrinite reflectance (Rr) of coal is ranged from 0.38 % to 0.45%. Moisture is 8.34 to 10.12%, ar basis and volatile matter content 33.3 to 49.7%, daf basis. Ash content of Seam IV ranges from 25.6 to 29.5% (ar basis), whereas that of Seam II, III are low, ranging from 28.04-34.04 to 31.25% (ar basis). The calorific values of Seam II, III, IV range from 4926.18-5292.06, 4792.37, 4975.95-5198.95 to kcal/kg (ar basis). Total sulphur contents of the all three seams are low (1.34 to 2.35%, ad basis). The coal of North-Eldev deposit is classified as Long Flame coal according to Mongolian standard.