Distribution, classification, petrological and related gochemical (SRA) characteristics of a tropical lowland peat dome in the Kota Samarahan-Asajaya area, West Sarawak, Malaysia

Zulkifley, M.T.M. and Fatt, N.T. and Abdullah, W.H. and Raj, J.K. and Paramanathan Param, S. and Hashim, R. and Ashraf, M.A. (2013) Distribution, classification, petrological and related gochemical (SRA) characteristics of a tropical lowland peat dome in the Kota Samarahan-Asajaya area, West Sarawak, Malaysia. Central European Journal of Geosciences, 5 (2). pp. 285-314. ISSN 20819900

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Abstract

Petrographic studies indicate that lateral variations in the decomposition levels of peat are associated with the predominantly occurring peat macerals. Source Rock Analyzer (SRA) results indicate lateral variation in peat organic matter types from type II to III and back again to type II, occurring laterally within the top 0-m to 0.5-m layer at the basin margin to the midsection and further towards the near-center areas of the peat dome. This variation is most likely caused by a combination of factors: (a) Horizontal zonation and lateral variation of the dominant species of plant assemblages (b) Fibric (marginal) peats and hemic to sapric peats associated with type II organic matter (kerogen). Sample organic matter (coal-equivalent kerogen) typing indicates that the relative abundance of phytoclasts and palynomorphs generally supports the organic matter classification obtained by the SRA method. Lateral variations in the peat organic matter types may support the lateral vegetation variation concept. The classification of peat organic matter types (interpreted from visual analyses of palynological slides) occurring from the basin periphery to the mid-section and further towards the basin center yields organic matter of type II to type III and mixed types II to III (coal kerogen-equivalent), respectively.

Item Type: Article
Additional Information: Export Date: 16 December 2013 Source: Scopus Language of Original Document: English Correspondence Address: Department of Geology, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia References: Andriesse, J.P., (1988) Nature and Management of Tropical Peat Soils, , 1st ed. FAO Rome; Kurbatov, I.M., The question of the genesis of peat and its humic acids (1968) Transactions of the Second International Peat Congress, Leningrad. HMSO, Edinburgh, 1, pp. 133-137; Murtedza, M., Padmanabhan, E., Mei, B.L.H., Siong, W.B., (2002) The Peat Soils of Sarawak, , University Malaysia Sarawak Sarawak, Malaysia; Tie, Y.L., Baille, I.C., Phang, C.M.S., Lee, C.P., (1979) Soils of Gunung Mulu National Park, Kuching, Sarawak, Malaysia, , Department of Agriculture Sarawak; (1998) Keys to Soil Taxonomy, , Soil Survey Staff 8th ed. 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Uncontrolled Keywords: Organic matter type (coal-equivalent kerogen), palynofacies, phasic community zonation, phytoclasts, tropical lowland peats, Decomposition level, Lateral variations, Organic matter types, Petrographic studies, Relative abundance, Biogeochemistry, Biological materials, Coal, Domes, Kerogen, Organic compounds, Petroleum geology, Peat, abundance, basin, clast, decomposition, dome, maceral, tropical region, vegetation structure, Malaysia
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Faculty of Engineering
Depositing User: Mr Jenal S
Date Deposited: 10 Feb 2014 01:35
Last Modified: 10 Feb 2014 01:35
URI: http://eprints.um.edu.my/id/eprint/8868

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