Sample information and classification of lower Miocene gravity-flow types of sediment core CRP-1 (Table 1)
Nineteen samples of the Cape Roberts-1 drillcore were taken from Miocene- age deposits, from 90.25 – 146.50 metres below seafloor (mbsf) for thin section and laser grain-size analysis. Using the grain-size distribution, detailed core logging, X-radiography and thin-section analysis of microstructure...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.433054 2023-05-15T13:50:45+02:00 Sample information and classification of lower Miocene gravity-flow types of sediment core CRP-1 (Table 1) Howe, John Woolfe, Ken Fielding, Christopher R 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: 90.260 m * MAXIMUM DEPTH, sediment/rock: 146.495 m 1998-01-15 text/tab-separated-values, 114 data points https://doi.pangaea.de/10.1594/PANGAEA.433054 https://doi.org/10.1594/PANGAEA.433054 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.433054 https://doi.org/10.1594/PANGAEA.433054 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Howe, John; Woolfe, Ken; Fielding, Christopher R (1998): Lower Miocene glacimarine gravity flows, Cape Roberts drillhole-1, Ross Sea, Antarctica. Terra Antartica, 5(3), 393-399, hdl:10013/epic.28328.d001 16 km ENE Cape Roberts Cape Roberts Project Comment Core wireline system CRP CRP-1 CWS Depth bottom/max sediment/rock top/min Interpretation Lithologic unit/sequence Lithology/composition/facies off Cape Roberts Ross Sea Antarctica Sampling/drilling ice Dataset 1998 ftpangaea https://doi.org/10.1594/PANGAEA.433054 2023-01-20T08:18:44Z Nineteen samples of the Cape Roberts-1 drillcore were taken from Miocene- age deposits, from 90.25 – 146.50 metres below seafloor (mbsf) for thin section and laser grain-size analysis. Using the grain-size distribution, detailed core logging, X-radiography and thin-section analysis of microstructures, coupled with a statistical grouping of the grain-size data, three main styles of gravity-flow sedimentation were revealed. Thin (centimetre-scale) muddy debris-flow deposits are the most common and are possibly tirggered by debris rain-out from sea-ice These deposits are characterised by very poorly sorted, faintly laminated muddy sandstones with coarse granules toward their base. Contacts are gradational to sharp. Variations on this style of mass-wasting deposit are rhythmically stacked sequences of pebbly-coarse sandstones representing successive thin debris-flow events. These suggest very high sedimentation rates on an unstable slope in a shallow-water proximal glacimarine environment. Sandy-silty turbidites appear more common in the lower sections of the core, below approximately 141.00 mbsf, although they occur occasionally with the debris flow deposits The turbidites are characterised by inversely to normally graded, well-laminated siltstones with occasional lonestones, and represent a more distal shallow-water glacimarine environment. Dataset Antarc* Antarctica Ross Sea Sea ice PANGAEA - Data Publisher for Earth & Environmental Science Cape Roberts ENVELOPE(-70.467,-70.467,-68.950,-68.950) Roberts Cape ENVELOPE(163.200,163.200,-77.033,-77.033) Ross Sea 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 Cape Roberts Project Comment Core wireline system CRP CRP-1 CWS Depth bottom/max sediment/rock top/min Interpretation Lithologic unit/sequence Lithology/composition/facies off Cape Roberts Ross Sea Antarctica Sampling/drilling ice |
spellingShingle |
16 km ENE Cape Roberts Cape Roberts Project Comment Core wireline system CRP CRP-1 CWS Depth bottom/max sediment/rock top/min Interpretation Lithologic unit/sequence Lithology/composition/facies off Cape Roberts Ross Sea Antarctica Sampling/drilling ice Howe, John Woolfe, Ken Fielding, Christopher R Sample information and classification of lower Miocene gravity-flow types of sediment core CRP-1 (Table 1) |
topic_facet |
16 km ENE Cape Roberts Cape Roberts Project Comment Core wireline system CRP CRP-1 CWS Depth bottom/max sediment/rock top/min Interpretation Lithologic unit/sequence Lithology/composition/facies off Cape Roberts Ross Sea Antarctica Sampling/drilling ice |
description |
Nineteen samples of the Cape Roberts-1 drillcore were taken from Miocene- age deposits, from 90.25 – 146.50 metres below seafloor (mbsf) for thin section and laser grain-size analysis. Using the grain-size distribution, detailed core logging, X-radiography and thin-section analysis of microstructures, coupled with a statistical grouping of the grain-size data, three main styles of gravity-flow sedimentation were revealed. Thin (centimetre-scale) muddy debris-flow deposits are the most common and are possibly tirggered by debris rain-out from sea-ice These deposits are characterised by very poorly sorted, faintly laminated muddy sandstones with coarse granules toward their base. Contacts are gradational to sharp. Variations on this style of mass-wasting deposit are rhythmically stacked sequences of pebbly-coarse sandstones representing successive thin debris-flow events. These suggest very high sedimentation rates on an unstable slope in a shallow-water proximal glacimarine environment. Sandy-silty turbidites appear more common in the lower sections of the core, below approximately 141.00 mbsf, although they occur occasionally with the debris flow deposits The turbidites are characterised by inversely to normally graded, well-laminated siltstones with occasional lonestones, and represent a more distal shallow-water glacimarine environment. |
format |
Dataset |
author |
Howe, John Woolfe, Ken Fielding, Christopher R |
author_facet |
Howe, John Woolfe, Ken Fielding, Christopher R |
author_sort |
Howe, John |
title |
Sample information and classification of lower Miocene gravity-flow types of sediment core CRP-1 (Table 1) |
title_short |
Sample information and classification of lower Miocene gravity-flow types of sediment core CRP-1 (Table 1) |
title_full |
Sample information and classification of lower Miocene gravity-flow types of sediment core CRP-1 (Table 1) |
title_fullStr |
Sample information and classification of lower Miocene gravity-flow types of sediment core CRP-1 (Table 1) |
title_full_unstemmed |
Sample information and classification of lower Miocene gravity-flow types of sediment core CRP-1 (Table 1) |
title_sort |
sample information and classification of lower miocene gravity-flow types of sediment core crp-1 (table 1) |
publisher |
PANGAEA |
publishDate |
1998 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.433054 https://doi.org/10.1594/PANGAEA.433054 |
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: 90.260 m * MAXIMUM DEPTH, sediment/rock: 146.495 m |
long_lat |
ENVELOPE(-70.467,-70.467,-68.950,-68.950) ENVELOPE(163.200,163.200,-77.033,-77.033) ENVELOPE(163.755080,163.755080,-77.007580,-77.007580) |
geographic |
Cape Roberts Roberts Cape Ross Sea |
geographic_facet |
Cape Roberts Roberts Cape Ross Sea |
genre |
Antarc* Antarctica Ross Sea Sea ice |
genre_facet |
Antarc* Antarctica Ross Sea Sea ice |
op_source |
Supplement to: Howe, John; Woolfe, Ken; Fielding, Christopher R (1998): Lower Miocene glacimarine gravity flows, Cape Roberts drillhole-1, Ross Sea, Antarctica. Terra Antartica, 5(3), 393-399, hdl:10013/epic.28328.d001 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.433054 https://doi.org/10.1594/PANGAEA.433054 |
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.433054 |
_version_ |
1766253980859498496 |