Modal analyses of thin-sections of sediment core CRP-1 (Table 1)
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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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.438843 2023-05-15T13:50:46+02:00 Modal analyses of thin-sections of sediment core CRP-1 (Table 1) Fielding, Christopher R Baker, Julian C Woolfe, Ken Howe, John Lavelle, Mark LATITUDE: -77.007580 * LONGITUDE: 163.755080 * DATE/TIME START: 1997-10-17T01:30:00 * DATE/TIME END: 1997-10-24T02:00:00 * MINIMUM DEPTH, sediment/rock: 38.41 m * MAXIMUM DEPTH, sediment/rock: 43.57 m 1998-01-15 text/tab-separated-values, 75 data points https://doi.pangaea.de/10.1594/PANGAEA.438843 https://doi.org/10.1594/PANGAEA.438843 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.438843 https://doi.org/10.1594/PANGAEA.438843 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY 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, hdl:10013/epic.28334.d001 16 km ENE Cape Roberts Calcite Cape Roberts Project Chert Claystone Core wireline system CRP CRP-1 CWS DEPTH sediment/rock Epoch Grain size mean radius Kalifeldspar Micrite off Cape Roberts Ross Sea Antarctica Opaque minerals Plagioclase Porosity Pyroxene Quartz Sampling/drilling ice Sorting description Thin section analysis/measurements Volcanic glass Volcanite Dataset 1998 ftpangaea https://doi.org/10.1594/PANGAEA.438843 2023-01-20T08:19:44Z 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 Ross Sea PANGAEA - Data Publisher for Earth & Environmental Science Antarctic The Antarctic Ross Sea Cape Roberts ENVELOPE(-70.467,-70.467,-68.950,-68.950) ENVELOPE(163.755080,163.755080,-77.007580,-77.007580) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
16 km ENE Cape Roberts Calcite Cape Roberts Project Chert Claystone Core wireline system CRP CRP-1 CWS DEPTH sediment/rock Epoch Grain size mean radius Kalifeldspar Micrite off Cape Roberts Ross Sea Antarctica Opaque minerals Plagioclase Porosity Pyroxene Quartz Sampling/drilling ice Sorting description Thin section analysis/measurements Volcanic glass Volcanite |
spellingShingle |
16 km ENE Cape Roberts Calcite Cape Roberts Project Chert Claystone Core wireline system CRP CRP-1 CWS DEPTH sediment/rock Epoch Grain size mean radius Kalifeldspar Micrite off Cape Roberts Ross Sea Antarctica Opaque minerals Plagioclase Porosity Pyroxene Quartz Sampling/drilling ice Sorting description Thin section analysis/measurements Volcanic glass Volcanite Fielding, Christopher R Baker, Julian C Woolfe, Ken Howe, John Lavelle, Mark Modal analyses of thin-sections of sediment core CRP-1 (Table 1) |
topic_facet |
16 km ENE Cape Roberts Calcite Cape Roberts Project Chert Claystone Core wireline system CRP CRP-1 CWS DEPTH sediment/rock Epoch Grain size mean radius Kalifeldspar Micrite off Cape Roberts Ross Sea Antarctica Opaque minerals Plagioclase Porosity Pyroxene Quartz Sampling/drilling ice Sorting description Thin section analysis/measurements Volcanic glass Volcanite |
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) |
title_short |
Modal analyses of thin-sections of sediment core CRP-1 (Table 1) |
title_full |
Modal analyses of thin-sections of sediment core CRP-1 (Table 1) |
title_fullStr |
Modal analyses of thin-sections of sediment core CRP-1 (Table 1) |
title_full_unstemmed |
Modal analyses of thin-sections of sediment core CRP-1 (Table 1) |
title_sort |
modal analyses of thin-sections of sediment core crp-1 (table 1) |
publisher |
PANGAEA |
publishDate |
1998 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.438843 https://doi.org/10.1594/PANGAEA.438843 |
op_coverage |
LATITUDE: -77.007580 * LONGITUDE: 163.755080 * DATE/TIME START: 1997-10-17T01:30:00 * DATE/TIME END: 1997-10-24T02:00:00 * MINIMUM DEPTH, sediment/rock: 38.41 m * MAXIMUM DEPTH, sediment/rock: 43.57 m |
long_lat |
ENVELOPE(-70.467,-70.467,-68.950,-68.950) ENVELOPE(163.755080,163.755080,-77.007580,-77.007580) |
geographic |
Antarctic The Antarctic Ross Sea Cape Roberts |
geographic_facet |
Antarctic The Antarctic Ross Sea Cape Roberts |
genre |
Antarc* Antarctic Antarctica Ross Sea |
genre_facet |
Antarc* Antarctic Antarctica Ross Sea |
op_source |
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, hdl:10013/epic.28334.d001 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.438843 https://doi.org/10.1594/PANGAEA.438843 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.438843 |
_version_ |
1766253981684727808 |