Laser-derived particle size data from CRP-3, Victoria Land Basin, Antarctica: Implications for sequence and seismic stratigraphy
Seven hundred and nineteen samples from throughout the Cainozoic section in CRP-3 were analysed by a Malvern Mastersizer laser particle analyser, in order to derive a stratigraphic distribution of grain-size parameters downhole. Entropy analysis of these data (using the method of Woolfe and Michibay...
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2001
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ftunivqespace:oai:espace.library.uq.edu.au:UQ:58883 2023-05-15T13:32:23+02:00 Laser-derived particle size data from CRP-3, Victoria Land Basin, Antarctica: Implications for sequence and seismic stratigraphy Fielding, C. R. Dunbar, G. B. Bryce, S.M. Peter J Barrett Carlo Alberto Ricci 2001-01-01 https://espace.library.uq.edu.au/view/UQ:58883 eng eng Terra Antartica Publication issn:1122-8628 Cenozoic laser method lithology particle size seismic stratigraphy sequence stratigraphy well logging 260104 Sedimentology C1 780104 Earth sciences 0499 Other Earth Sciences Journal Article 2001 ftunivqespace 2020-08-04T00:52:53Z Seven hundred and nineteen samples from throughout the Cainozoic section in CRP-3 were analysed by a Malvern Mastersizer laser particle analyser, in order to derive a stratigraphic distribution of grain-size parameters downhole. Entropy analysis of these data (using the method of Woolfe and Michibayashi, 1995) allowed recognition of four groups of samples, each group characterised by a distinctive grain-size distribution. Group 1, which shows a multi-modal distribution, corresponds to mudrocks, interbedded mudrock/sandstone facies, muddy sandstones and diamictites. Group 2, with a sand-grade mode but showing wide dispersion of particle size, corresponds to muddy sandstones, a few cleaner sandstones and some conglomerates. Group 3 and Group 4 are also sand-dominated, with better grain-size sorting, and correspond to clean, well-washed sandstones of varying mean grain-size (medium and fine modes, respectively). The downhole disappearance of Group 1, and dominance of Groups 3 and 4 reflect a concomitant change from mudrock- and diamictite-rich lithology to a section dominated by clean, well-washed sandstones with minor conglomerates. Progressive downhole increases in percentage sand and principal mode also reflect these changes. Significant shifts in grain-size parameters and entropy group membership were noted across sequence boundaries and seismic reflectors, as recognised in others studies. Article in Journal/Newspaper Antarc* Antarctica Victoria Land The University of Queensland: UQ eSpace Victoria Land |
institution |
Open Polar |
collection |
The University of Queensland: UQ eSpace |
op_collection_id |
ftunivqespace |
language |
English |
topic |
Cenozoic laser method lithology particle size seismic stratigraphy sequence stratigraphy well logging 260104 Sedimentology C1 780104 Earth sciences 0499 Other Earth Sciences |
spellingShingle |
Cenozoic laser method lithology particle size seismic stratigraphy sequence stratigraphy well logging 260104 Sedimentology C1 780104 Earth sciences 0499 Other Earth Sciences Fielding, C. R. Dunbar, G. B. Bryce, S.M. Laser-derived particle size data from CRP-3, Victoria Land Basin, Antarctica: Implications for sequence and seismic stratigraphy |
topic_facet |
Cenozoic laser method lithology particle size seismic stratigraphy sequence stratigraphy well logging 260104 Sedimentology C1 780104 Earth sciences 0499 Other Earth Sciences |
description |
Seven hundred and nineteen samples from throughout the Cainozoic section in CRP-3 were analysed by a Malvern Mastersizer laser particle analyser, in order to derive a stratigraphic distribution of grain-size parameters downhole. Entropy analysis of these data (using the method of Woolfe and Michibayashi, 1995) allowed recognition of four groups of samples, each group characterised by a distinctive grain-size distribution. Group 1, which shows a multi-modal distribution, corresponds to mudrocks, interbedded mudrock/sandstone facies, muddy sandstones and diamictites. Group 2, with a sand-grade mode but showing wide dispersion of particle size, corresponds to muddy sandstones, a few cleaner sandstones and some conglomerates. Group 3 and Group 4 are also sand-dominated, with better grain-size sorting, and correspond to clean, well-washed sandstones of varying mean grain-size (medium and fine modes, respectively). The downhole disappearance of Group 1, and dominance of Groups 3 and 4 reflect a concomitant change from mudrock- and diamictite-rich lithology to a section dominated by clean, well-washed sandstones with minor conglomerates. Progressive downhole increases in percentage sand and principal mode also reflect these changes. Significant shifts in grain-size parameters and entropy group membership were noted across sequence boundaries and seismic reflectors, as recognised in others studies. |
author2 |
Peter J Barrett Carlo Alberto Ricci |
format |
Article in Journal/Newspaper |
author |
Fielding, C. R. Dunbar, G. B. Bryce, S.M. |
author_facet |
Fielding, C. R. Dunbar, G. B. Bryce, S.M. |
author_sort |
Fielding, C. R. |
title |
Laser-derived particle size data from CRP-3, Victoria Land Basin, Antarctica: Implications for sequence and seismic stratigraphy |
title_short |
Laser-derived particle size data from CRP-3, Victoria Land Basin, Antarctica: Implications for sequence and seismic stratigraphy |
title_full |
Laser-derived particle size data from CRP-3, Victoria Land Basin, Antarctica: Implications for sequence and seismic stratigraphy |
title_fullStr |
Laser-derived particle size data from CRP-3, Victoria Land Basin, Antarctica: Implications for sequence and seismic stratigraphy |
title_full_unstemmed |
Laser-derived particle size data from CRP-3, Victoria Land Basin, Antarctica: Implications for sequence and seismic stratigraphy |
title_sort |
laser-derived particle size data from crp-3, victoria land basin, antarctica: implications for sequence and seismic stratigraphy |
publisher |
Terra Antartica Publication |
publishDate |
2001 |
url |
https://espace.library.uq.edu.au/view/UQ:58883 |
geographic |
Victoria Land |
geographic_facet |
Victoria Land |
genre |
Antarc* Antarctica Victoria Land |
genre_facet |
Antarc* Antarctica Victoria Land |
op_relation |
issn:1122-8628 |
_version_ |
1766026224464822272 |