Modal analyses of thin-sections of sediment core CRP-1 (Table 1), supplement to: Fielding, Christopher R; Baker, Julian C; Woolfe, Ken; Howe, John; Lavelle, Mark (1998): Reassessment of the Miocene-Quaternary boundary in CRP-1, Cape Roberts Project, Antarctica. Terra Antartica, 5(3), 425-426
During the course of the 1997 drilling campaign, lithostratigraphic boundaries were assigned to the CRP-l core on the basis of perceived changes in lithology. The geologically most important boundary in the core, between the Miocene and overlying Quaternary sections, was placed at 43.55 mbsf. This h...
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PANGAEA - Data Publisher for Earth & Environmental Science
1998
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ftdatacite:10.1594/pangaea.438843 2023-05-15T13:47:06+02:00 Modal analyses of thin-sections of sediment core CRP-1 (Table 1), supplement to: Fielding, Christopher R; Baker, Julian C; Woolfe, Ken; Howe, John; Lavelle, Mark (1998): Reassessment of the Miocene-Quaternary boundary in CRP-1, Cape Roberts Project, Antarctica. Terra Antartica, 5(3), 425-426 Fielding, Christopher R Baker, Julian C Woolfe, Ken Howe, John Lavelle, Mark 1998 text/tab-separated-values https://dx.doi.org/10.1594/pangaea.438843 https://doi.pangaea.de/10.1594/PANGAEA.438843 en eng PANGAEA - Data Publisher for Earth & Environmental Science Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY DEPTH, sediment/rock Epoch Quartz Chert Kalifeldspar Plagioclase Volcanite Volcanic glass Pyroxene Calcite Micrite Opaque minerals Claystone Porosity Grain size, mean radius Sorting description Core wireline system Thin section analysis/measurements CRP-1 Sampling/drilling ice Cape Roberts Project CRP Supplementary Dataset dataset Dataset 1998 ftdatacite https://doi.org/10.1594/pangaea.438843 2021-11-05T12:55:41Z During the course of the 1997 drilling campaign, lithostratigraphic boundaries were assigned to the CRP-l core on the basis of perceived changes in lithology. The geologically most important boundary in the core, between the Miocene and overlying Quaternary sections, was placed at 43.55 mbsf. This horizon was described in the core logs (Cape Roberts Science Team, 1998) as a contact between muddy, finegrained sandstone (which were assigned a Lower Miocene age based on diatom biostratigsaphy) and overlying diamictons containing Quaternary diatoms. This boundary is a major unconformity, recognisable on seismic reflection records. As such, it has considerable significance in the ongoing scientific analysis of the drillcore. During a re-examination of the core, focusing on the archive half held at the Antarctic Geology Research Facility of the Florida State University at Tallahassee; the authors noted that the core across the published boundary (43.55 mbsf) did not show any lithological change, but logged a sharp contact between dark olive grey, muddy sandstone and overlying diamicton at 43.15 mbsf (Fig. l). We suggest, therefore, that the core log in appendix l of Cape Roberts Science Team (1998) is misleading over this interval. In order to test the veracity of the suggested boundary revision, a series of thin-sections was examined and point-counted for framework grain abundances. Dataset Antarc* Antarctic Antarctica antartic* DataCite Metadata Store (German National Library of Science and Technology) Antarctic The Antarctic Cape Roberts ENVELOPE(-70.467,-70.467,-68.950,-68.950) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
DEPTH, sediment/rock Epoch Quartz Chert Kalifeldspar Plagioclase Volcanite Volcanic glass Pyroxene Calcite Micrite Opaque minerals Claystone Porosity Grain size, mean radius Sorting description Core wireline system Thin section analysis/measurements CRP-1 Sampling/drilling ice Cape Roberts Project CRP |
spellingShingle |
DEPTH, sediment/rock Epoch Quartz Chert Kalifeldspar Plagioclase Volcanite Volcanic glass Pyroxene Calcite Micrite Opaque minerals Claystone Porosity Grain size, mean radius Sorting description Core wireline system Thin section analysis/measurements CRP-1 Sampling/drilling ice Cape Roberts Project CRP Fielding, Christopher R Baker, Julian C Woolfe, Ken Howe, John Lavelle, Mark Modal analyses of thin-sections of sediment core CRP-1 (Table 1), supplement to: Fielding, Christopher R; Baker, Julian C; Woolfe, Ken; Howe, John; Lavelle, Mark (1998): Reassessment of the Miocene-Quaternary boundary in CRP-1, Cape Roberts Project, Antarctica. Terra Antartica, 5(3), 425-426 |
topic_facet |
DEPTH, sediment/rock Epoch Quartz Chert Kalifeldspar Plagioclase Volcanite Volcanic glass Pyroxene Calcite Micrite Opaque minerals Claystone Porosity Grain size, mean radius Sorting description Core wireline system Thin section analysis/measurements CRP-1 Sampling/drilling ice Cape Roberts Project CRP |
description |
During the course of the 1997 drilling campaign, lithostratigraphic boundaries were assigned to the CRP-l core on the basis of perceived changes in lithology. The geologically most important boundary in the core, between the Miocene and overlying Quaternary sections, was placed at 43.55 mbsf. This horizon was described in the core logs (Cape Roberts Science Team, 1998) as a contact between muddy, finegrained sandstone (which were assigned a Lower Miocene age based on diatom biostratigsaphy) and overlying diamictons containing Quaternary diatoms. This boundary is a major unconformity, recognisable on seismic reflection records. As such, it has considerable significance in the ongoing scientific analysis of the drillcore. During a re-examination of the core, focusing on the archive half held at the Antarctic Geology Research Facility of the Florida State University at Tallahassee; the authors noted that the core across the published boundary (43.55 mbsf) did not show any lithological change, but logged a sharp contact between dark olive grey, muddy sandstone and overlying diamicton at 43.15 mbsf (Fig. l). We suggest, therefore, that the core log in appendix l of Cape Roberts Science Team (1998) is misleading over this interval. In order to test the veracity of the suggested boundary revision, a series of thin-sections was examined and point-counted for framework grain abundances. |
format |
Dataset |
author |
Fielding, Christopher R Baker, Julian C Woolfe, Ken Howe, John Lavelle, Mark |
author_facet |
Fielding, Christopher R Baker, Julian C Woolfe, Ken Howe, John Lavelle, Mark |
author_sort |
Fielding, Christopher R |
title |
Modal analyses of thin-sections of sediment core CRP-1 (Table 1), supplement to: Fielding, Christopher R; Baker, Julian C; Woolfe, Ken; Howe, John; Lavelle, Mark (1998): Reassessment of the Miocene-Quaternary boundary in CRP-1, Cape Roberts Project, Antarctica. Terra Antartica, 5(3), 425-426 |
title_short |
Modal analyses of thin-sections of sediment core CRP-1 (Table 1), supplement to: Fielding, Christopher R; Baker, Julian C; Woolfe, Ken; Howe, John; Lavelle, Mark (1998): Reassessment of the Miocene-Quaternary boundary in CRP-1, Cape Roberts Project, Antarctica. Terra Antartica, 5(3), 425-426 |
title_full |
Modal analyses of thin-sections of sediment core CRP-1 (Table 1), supplement to: Fielding, Christopher R; Baker, Julian C; Woolfe, Ken; Howe, John; Lavelle, Mark (1998): Reassessment of the Miocene-Quaternary boundary in CRP-1, Cape Roberts Project, Antarctica. Terra Antartica, 5(3), 425-426 |
title_fullStr |
Modal analyses of thin-sections of sediment core CRP-1 (Table 1), supplement to: Fielding, Christopher R; Baker, Julian C; Woolfe, Ken; Howe, John; Lavelle, Mark (1998): Reassessment of the Miocene-Quaternary boundary in CRP-1, Cape Roberts Project, Antarctica. Terra Antartica, 5(3), 425-426 |
title_full_unstemmed |
Modal analyses of thin-sections of sediment core CRP-1 (Table 1), supplement to: Fielding, Christopher R; Baker, Julian C; Woolfe, Ken; Howe, John; Lavelle, Mark (1998): Reassessment of the Miocene-Quaternary boundary in CRP-1, Cape Roberts Project, Antarctica. Terra Antartica, 5(3), 425-426 |
title_sort |
modal analyses of thin-sections of sediment core crp-1 (table 1), supplement to: fielding, christopher r; baker, julian c; woolfe, ken; howe, john; lavelle, mark (1998): reassessment of the miocene-quaternary boundary in crp-1, cape roberts project, antarctica. terra antartica, 5(3), 425-426 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
1998 |
url |
https://dx.doi.org/10.1594/pangaea.438843 https://doi.pangaea.de/10.1594/PANGAEA.438843 |
long_lat |
ENVELOPE(-70.467,-70.467,-68.950,-68.950) |
geographic |
Antarctic The Antarctic Cape Roberts |
geographic_facet |
Antarctic The Antarctic Cape Roberts |
genre |
Antarc* Antarctic Antarctica antartic* |
genre_facet |
Antarc* Antarctic Antarctica antartic* |
op_rights |
Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/pangaea.438843 |
_version_ |
1766246318323269632 |