The influence of intrusion on change characteristic of coal in Mallawa Formation of South Sulawesi Province Anshariah, AM Imran , S Widodo and UR Irvan
1Doctoral student of Earth and Environmental Technology, Faculty Engineering,
Hasanuddin University, 90245, Indonesia.
2Geological Engineering Department, Faculty of Engineering, Hasanuddin
University, 90245, Indonesia.
3Mining Engineering Department, Faculty of Engineering, Hasanuddin University,
90245, Indonesia.
4Mining Engineering Department, Faculty of Industrial Technology, Universitas
Muslim Indonesia, 90231, Indonesia
Abstract
Coal that is deposited in the same depositional environment, age, and formation will
usually have the same characteristics. However, the influence of geological conditions in an area
can cause differences in the characteristics of coal in the same formation. This study aims to analyze
geological factors that can affect differences in the characteristics of coal in the same depositional
environment, age and formation. The study was conducted at three different locations, namely
Mallawa District, Maros Regency- Lanne District, Pangkep Regency- and Massenrengpulu Region,
Bone Regency. The coal sampling method in the study area uses the channel sampling method (ply
by ply) which represents the bottom, middle and top coal seams. The results of the proximate
analysis of coal in the Mallawa District Maros Regency showed an average moisture content of
7.78%, an average ash content of 39.99%, volatile matter 32.85%, and fixed carbon 19.39%. While
in the area of Lanne District, Pangkep Regency shows an average moisture content of 9.65%, an
average ash content of 40.41%, volatile matter 33.80%, and fixed carbon 16.16%. The results of
proximate analysis in the Massenrengpulu area of Pangkep Regency showed an average moisture
content of 3.86%, an average ash content of 23.16%, volatile matter 35.53%, and fixed carbon
37.46%. Coal from Mallawa and Lanne District has relatively the same characteristics, while the
Massenrengpulu coal has lower moisture and ash content, and higher fixed carbon caused by the
intrusion of igneous rocks in the area which causes the coal maturation process to be faster than the
other two regions.
