BATUAN SEDIMEN HALUS KELOMPOK MANDAI BERDASARKAN ANALISIS SCANNING ELECTRON MICROSCOPE (SEM)
DOI:
https://doi.org/10.33332/jgsm.geologi.v23i3.85Abstract
The eastern part of the Ketungau basin that is generally known us the Mandai sub-basin is a sedimentary basin that had been formed since early Tertiary. Fine-grained sedimentary rocks taken from the Mandai Group comprising four samples of mudstone and three samples of siltstone. Based on Scanning Electron Microscope analysis seven samples fine sediment of the Mandai group consist of illite (K1-1.5Al4(Si7-6.5Al1-1.5O20)(OH)4, smectite (1/2Ca)0.7(Al,Mg,Fe)4(Si,Al)8O20)nH2O and kaolinite (Al4(Si4O10)(OH)8. Other minerals are silica or fine-grained quarzt, feldspar, and algae (botryococcus). Diagenesis processes show that fine sediment of the Mandai group have undergone a diagenetic process within an mesodiagenetic level. Fine sediments have been buried at more than 2500 - 4000 m depth by temperature varying from 80° to 120°C.
Key words : Ketungau Basin, SEM, diagenesis, siltstone, mudstone
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References
BPPKA, Pertamina, 1997.
Burley, S.D., Kantorowicz , J.D. & Waugh, B. 1987. Clastic Diagenesis., In: Beaumont, E.A. and Foster, N.H., (compilators); Reservoirs II, Sandstones, Treatise of Petroleum Geology Reprint Series No. 4, AAPG., p.408-445.
Heriyanto, R., William, P.R., Harahap, B., dan Pieters, P.E., 1993, Peta Geologi Lembar Sintang, Kalimantan, Skala 1: 250.000, Direktorat Geologi, Bandung.
Hermiyanto, M.H., dan Suyono, 2009, Laporan Penelitian Dinamika Cekungan Ketungau, Kalimantan Barat, Pusat Survei Geologi, Bandung.
Noya.Y.,Pieters P.E, dan Surono. 1993. Peta Geologi Lembar Nangaobat, Kalimantan, skala 1 : 250.000, Pusat penelitian dan Pengembangan Geologi, Bandung.
Pieters, P.E., Trail, D.S., and Supriatna, S, 1987. 'Correlation of Early Tertiary rocks across Kalimantan. Proc. Indon. Petrol. Assoc., 16 Ann. Con., 291-306.
Pieters, P.E., Surono, and Noya, Y., 1993. Peta Geologi Lembar Putussibau, Kalimantan, Skala 1: 250.000, Direktorat Geologi, Bandung.
Pittman, E.D., 1979. Porosity, diagenesis and productive capability of sandstone reservoirs; SEPM Spec. Publ., No. 26, p. 159-173.
Schmidt, V. dan Mc Donald, D.A., 1979. The rock of secondary in the course of sandstone diagenesis. Soc. Econ. Pal. Min., Spec. Publ. No.26, p 175-207.
Wilson, M.D. and Pittman, E.D., 1979. Authigenetic Clays in sandstone: Recoqnized and influence on reservoir properties and palaeoenvironmental analysis, Jour. Sed. Petrol. No. 47, p. 3-31.
Surono, Peiters P.E, dan Noya.Y.1993. Peta Geologi Lembar Pegunungan Kapuas, Kalimantan, skala 1 : 250.000, Pusat penelitian dan Pengembangan Geologi, Bandung.
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