PETROGRAPHIC CHARACTERISTICS AND DEPOSITIONAL ENVIRONMENT OF COAL SEAMS D (MERAPI) AND E (KELADI), MUARA ENIM FORMATION, SOUTH SUMATERA BASIN
DOI:
https://doi.org/10.30556/imj.Vol15.No1.2012.470Keywords:
coal, petrography, depositional environment, South Sumatra BasinAbstract
Coal seams D and E belong to the Muara Enim Formation in South Sumatra Basin, which includes to the Middle Miocene to Late Miocene. The research is located at the Air Laya coal mines, PTBA, Tanjung Enim, South Suma- tra. The purpose of this study was to investigate the characteristics of coal and coal depositional environments of Seam D (Merapi) and Seam E (Keladi). Observations were done on samples of coal from exploration drilling results from the Air Laya mining pit. The analysis is carried out by a petrographic analysis, which is supported by the results of coal vitrinite refl ectance.
Petrographic characteristics indicate that both of seams D and E dominant macerals are vitrinite, the most dominant sub-group of vitrinite is telovitrinite. Inertinite in both seams consists of semifusinite, sclerotinite and inertodetrinite. Pyrite, clay mineral and carbonate are the main mineral in the seams. Vitrinite refl ectance (Rv- max,%) value shows similar rank of sub-bituminous to high volatile bituminous. Based on the results of coal depositional environment reconstruction using four parameters, which are the degree of preservation of plant tissue (TPI), the degree of Gelifi cation (GI), the degree of ground water infl uence (GWI) and vegetation aspects (VI), it is interpreted that seams D (Merapi) and E (Keladi) were deposited in upper delta plain depositional environment with ombrotrophic peat type.
References
ASTM Standards, 2009. Section five: Petroleum product, lubricants and fossil fuels, volume 05.06 Gaseous fuel; coal and coke, revision issued annually, p. 776.
Anggayana, K., 1991. Perubahan Harga Parameter Terukur Dari Pengukuran Resonansi Spin Elektron Pada Batubara Akibat Perubahan Temperatur. Tesis S2. Teknik Pertambangan, ITB.
Belkin, H.E., Tewalt, S.J., Hower, J.C., Stucker, J.D. and O’Keefe, J.M.K., 2009. Geochemistry and petrology of selected coal samples from Sumatra, Kalimantan, Sulawesi and Papua, Indonesia. International Journal of Coal Geology, vol.77, p. 260-268.
Bustin, R.M., Cameron, A.R., Grieve, D.A. and Kalkreuth, W.D., 1983. Coal petrology its principles, methods, and applications, Geological Association of Canada, Short course notes, vol. 3, Canada, p. 273.
Calder, J.H., Gibling, M.R and Mukhopadhyay, P.K 1991. Peat Formation in a Westphalian B Piedmont Setting, Cumberland Basin, Nova Scotia: Implications for the Maceral-Based Interpretation of Rheotrophic and Raised Paleomires, Bulletin of Social Geology France.
Daranin,E.A., 1995. Studi Petrografi Batubara Untuk Penentuan Peringkat dan Lingkungan Pengendapan Batubara di Daerah Bukit Kendi, Muara Enim, Sumatera Selatan. Bidang Spesialisasi Eksplorasi Sumberdaya Bumi. Program Studi Rekayasa Pertambangan Program Pasca Sarjana, Institut Teknologi Bandung.
Darman, H. and Sidi, F.H., 2000. An outline of the geology of Indonesia. Indonesian Association of Geologists, Jakarta, 192 p.
Daulay, B., Ningrum, N.S. and Cook, A.C., 2000. Coalification of Indonesian Coal, Proceedings of Southeast Asian coal Geology, Bandung, p. 85-92.
Diessel, C.F.K., et al., 1986. The correlation between Coal facies and depositional enviroment advamce in study basin.
Diessel, C.F.K., 1992. Coal-bearing depositional systems. Springer-Verlag, 721 p.
Falcon, R.M.S. and Snyman, C.P., 1986. An introduction to coal petrography: Atlas of petrographic constituents in bituminous coal of Southern Africa, The Geological Society of South Africa, Review paper Number 2, 27 p, 39 plates.
Gafoer, S., Cobrie, T. and Purnomo, J., 2007. Geological map of the Lahat quadrangle, South Sumatera, scale 1:250,000. Geological Research and Development Centre, Bandung.
Kinhill-otto Gold, 1986. Exploration, feasibility study preparation and training activities related to coal deposits in the South Sumatera province of Indonesia.
Shell Mijnbouw, 1978. Explanatory notes to the geological map of the South Sumatera coal province. Jakarta (unpublished).
Stach, E., Mackowsky, M.Th., Teichmüller, M., Taylor, G.H., Chandra, D. and Teichmüller, R., 1982. Stach’s textbook of coal petrology, 3rd edition, Berlin, Stuttgart, 535 p.
Suarez-Ruiz, I and Crelling, J.C., 2008. Applied coal petrology. Elsevier. Amsterdam, 388 p.
Susilawati, R. and Ward, C.R., 2006. Metamorphism of mineral matter in coal from the Bukit Asam deposit, South Sumatra, Indonesia. International Journal of Coal Geology, vol.68, p. 171-195.
Suwarna, N. and Kusumahbrata, Y., 2010. Macroscopic, microscopic and paleodepositional features of selected coals in Arahan, Banjarsari, Suban Jeriji and South Banko regions, South Sumatera. Jurnal Geologi Indonesia, vol.5, no.4, p. 269-290.
Teichmüller, M. and Teichmüller, R., 1982, The geological basis of coal formation: in Stach, E., Mackowsky, M.Th., Teichmüller, M., Taylor, G.H., Chandra, D., and Teichmuller, Coal Petrology, 3rd Edition, Gebruder Borntraeger, Berlin-Stuttgart, p. 5-86.
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