Controls on the chemical variability of peat types in a domed peat deposit, Baram River Area, Sarawak, Malaysia

Calvert, G. C., Durig, J. R. and Esterle, J. S. (1991) Controls on the chemical variability of peat types in a domed peat deposit, Baram River Area, Sarawak, Malaysia. International Journal of Coal Geology, 17 2: 171-188. doi:10.1016/0166-5162(91)90009-8


Author Calvert, G. C.
Durig, J. R.
Esterle, J. S.
Title Controls on the chemical variability of peat types in a domed peat deposit, Baram River Area, Sarawak, Malaysia
Journal name International Journal of Coal Geology   Check publisher's open access policy
ISSN 0166-5162
Publication date 1991-01-01
Sub-type Article (original research)
DOI 10.1016/0166-5162(91)90009-8
Volume 17
Issue 2
Start page 171
End page 188
Total pages 18
Place of publication London
Publisher Elsevier B.V.
Language eng
Subject 040309 Petroleum and Coal Geology
Abstract Pyrolysis GC/FT-IR/FID and pyrolysis GC/MS studies have been conducted on peat samples from the margin and central portions of a tropical domed peat deposit in the Baram River area, Sarawak, Malaysia, in order to determine the chemical variability of peat types found within the deposit. In an effort to “unmix” the chemical variability of the samples, an EXTENDED QMODEL program was utilized which produced a series of 4 end members. These end members, composed of various proportions of each of the 49 pyrolysis products monitored in this study, are combined in various proportions to reproduce the composition of each of the 32 samples. Comparison of the chemical data with previous petrographic and megascopic analysis reveals parallel trends between the input from the end members and the makeup and degree of degradation of each of the peat types. From this analysis, it can be concluded that the 4 end members produced in this analysis represent input from (a) guaiacyl lignins, (b) lignin biodegradation products, (c) cellulosic derived products, and (d) syringyl lignins. The inputs from the 4 end members can be traced to the type of plants and the degree of degradation. In addition, comparison of the spatial distribution of the 4 end members reveals that the samples in the central portion of the deposit have much more chemical variability than the highly degraded samples on the margin of the deposit.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Physical Sciences Publications
 
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Created: Wed, 06 Aug 2008, 19:51:33 EST by Laura McTaggart on behalf of School of Mathematics & Physics