13C-depleted charcoal from C4 grasses and the role of occluded carbon in phytoliths
dc.contributor.author | Krull, E | |
dc.contributor.author | Skjemstad, J | |
dc.contributor.author | Graetz, D | |
dc.contributor.author | Grice, Kliti | |
dc.contributor.author | Dunning, William | |
dc.contributor.author | Cook, G | |
dc.contributor.author | Parr, J | |
dc.date.accessioned | 2017-01-30T14:59:24Z | |
dc.date.available | 2017-01-30T14:59:24Z | |
dc.date.created | 2009-03-05T00:55:26Z | |
dc.date.issued | 2003 | |
dc.identifier.citation | Krull, E and Skjemstad, J and Graetz, D and Grice, Kliti and Dunning, William and Cook, G and Parr, J. 2003. 13C-depleted charcoal from C4 grasses and the role of occluded carbon in phytoliths. Organic Geochemistry. 34: pp. 1337-1352. | |
dc.identifier.uri | http://hdl.handle.net/20.500.11937/42404 | |
dc.identifier.doi | 10.1016/S0146-6380(03)00100-1 | |
dc.description.abstract |
The 13C values of plants and corresponding charred materials from wood, C3 and C4 grasses, derived from natural burning and laboratory combustion were obtained to determine whether there was a significant difference in 13C of grass-derived char (C3 and C4) compared with wood-derived (C3) char. Our data showed that there is an up to 8% 13C-depletion in C4-derived chars from natural burning but there was no significant isotopic change in chars from wood or C3 grasses. We suggest that this 13C-depletion in C4-derived chars is due to protected organic matter in silicate structures (phytoliths), which were found to be depleted by up to 9%. Analysis of this protected carbon by Py-GCMS indicated the presence of low relative amounts of n-alkanes. However, 13C-NMR data suggested that a significantportion of the phytolith-occluded material was composed of simple carbohydrates (O-alkyl carbon) and that alkyl carbon (lipid material) constituted a minor fraction.These isotopic and spectroscopic data have important implications for the calculation of the proportions of C3- versus C4-derived charred organic matter in modern as well as geological studies. | |
dc.publisher | Pergamon-Elsevier | |
dc.title | 13C-depleted charcoal from C4 grasses and the role of occluded carbon in phytoliths | |
dc.type | Journal Article | |
dcterms.source.volume | 34 | |
dcterms.source.startPage | 1337 | |
dcterms.source.endPage | 1352 | |
dcterms.source.issn | 0146-6380 | |
dcterms.source.title | Organic Geochemistry | |
curtin.note |
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curtin.accessStatus | Fulltext not available | |
curtin.faculty | Department of Applied Chemistry | |
curtin.faculty | School of Science and Computing | |
curtin.faculty | Faculty of Science and Engineering |