Development of Funginite on Muaraenim and Lower Members of Telisa Formations at Central Sumatra Basin - Indonesia

Abstract

Petrography analysis of coal is the study organic and inorganic components of coal bearing formations. This research conducted observation method under microscopic of thin incision to identify organic maseral group. The organic composition of coal from Muaraenim Formation is known to average for vitrinite maseral group 79.30%, inertinite 10%, liptinite 3.4%, and non-organic 7.3%. While the composition of coal from the Bottom Members of Telisa Formation for the average of vitrinite maseral group 66.4%, mineral matter 30.32%, inertinite 3.26%. The liptinite maseral group is not present as a coal component in the study area. The funginite development of the Muaraenim Formation is quite abundant 2.8% indicating peat swamp ecosystem in wet-dry conditions in ph 3 -5. In contrast, the development of funginite Lower Members of Telisa Formation is known to be absent which is replaced by the presence of frambiodal pyrite and indicates peat ecosystem in wet conditions at ph 6 -7.

Geology Of Tanjung Medan ,Rokan IV Koto , Rokan Hulu District, Riau Province

“…The detailed stratigraphic measurements including qualitativequantitative data in the form of lithologic observations, textures, primary-secondary sedimentary structures, biogenic sedimentary structures, mineral rock compositions (Pettijohn, 1975;Dunham, 1962;Streickesen, 1976), the thickness of each layer and the general layers of rock layers (Kausarian et al, 2018). Measurement structures include taking primary and secondary data in the form of indications that shown structural processes that occur such as joint, fold, and fault (Choanji, 2016;Prayitno, B, 2016;prayitno B., 2017;Yuskar et al, 2017).…”

Development of Active Fault Mapping Method Using Geoelectric and Geographical Information System

“…The Pretersier to Holocene-aged rocks that make up this region are varied and include sedimentary rocks, metasediments, young volcanic rocks, and intrusive rocks [7]. The pre-tertiary rock group exposed as bedrock in the eastern part of Bukit Barisan is the Tapanuli group (Tapanuli Group), which is of Ear ly Carbon to Early Perm age consisting of the Kuantan Formation which has lithology characteristics of greenschist metamorphic rocks, amphibolites and meta conglomerates [20]. Chronological conformable above it, The Peusangan Group, which is Late Permian to Late Triassic in age, consisting of tuffaceous limestone lithology, both of which have tectonic contact with the Woyla Group, which is Late Jurassic to Early Cretaceous in age, which is dominated by associated rocks with ophiolite which is very difficult to identify [21].…”