Clay and smectite analysis of sediment core CRP-2A ...
Sediments of the CRP-2/2A drill core from the continental shelf of McMurdo Sound in Ross Sea, Pacific sector of the Southern Ocean, have been investigated for their clay mineral assemblages, especially for the smectite contents and smectite crystallinities. Highest smectite amounts and best crystall...
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Online Access: | https://dx.doi.org/10.1594/pangaea.56138 https://doi.pangaea.de/10.1594/PANGAEA.56138 |
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ftdatacite:10.1594/pangaea.56138 2024-09-15T17:47:18+00:00 Clay and smectite analysis of sediment core CRP-2A ... Ehrmann, Werner 2000 text/tab-separated-values https://dx.doi.org/10.1594/pangaea.56138 https://doi.pangaea.de/10.1594/PANGAEA.56138 en eng PANGAEA Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 DEPTH, sediment/rock Size fraction < 0.002 mm, clay Smectite/standard ratio Smectite, integral width Core wireline system Grain size, sieving/settling tube X-ray diffraction TEXTUR, clay fraction CRP-2 Sampling/drilling from ice Cape Roberts Project CRP dataset Supplementary Dataset Dataset 2000 ftdatacite https://doi.org/10.1594/pangaea.56138 2024-08-01T11:03:26Z Sediments of the CRP-2/2A drill core from the continental shelf of McMurdo Sound in Ross Sea, Pacific sector of the Southern Ocean, have been investigated for their clay mineral assemblages, especially for the smectite contents and smectite crystallinities. Highest smectite amounts and best crystallinities occur in three intervals below 485 mbsf in CRP-2/2A. They indicate deposition of sediments during a time when chemical weathering was active on large ice-free areas on the nearby Antarctic continent. In he upper part of the core, smectite contents are much lower and crystallinities are worse. This clay mineral composition indicates deposition of sediments during a time when physical weathering prevailed on an ice-covered continent. At deep-sea sites around Antarctica the shift from smectite-dominated to smectite-poor and illite-rich assemblages is well dated as earliest Oligocene, 33.9-33.1 Ma, and documents the onset of continental glaciation in East Antarctica. At CIROS-1 a corresponding shift in the ... : Supplement to: Ehrmann, Werner (2000): Smectite content and crystallinity in sediments from CRP-2/2A, Victoria Land Basin, Antarctica. Terra Antartica, 7(4), 575-580 ... Dataset Antarc* Antarctic Antarctica antartic* East Antarctica McMurdo Sound Ross Sea Southern Ocean Victoria Land DataCite |
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English |
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DEPTH, sediment/rock Size fraction < 0.002 mm, clay Smectite/standard ratio Smectite, integral width Core wireline system Grain size, sieving/settling tube X-ray diffraction TEXTUR, clay fraction CRP-2 Sampling/drilling from ice Cape Roberts Project CRP |
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DEPTH, sediment/rock Size fraction < 0.002 mm, clay Smectite/standard ratio Smectite, integral width Core wireline system Grain size, sieving/settling tube X-ray diffraction TEXTUR, clay fraction CRP-2 Sampling/drilling from ice Cape Roberts Project CRP Ehrmann, Werner Clay and smectite analysis of sediment core CRP-2A ... |
topic_facet |
DEPTH, sediment/rock Size fraction < 0.002 mm, clay Smectite/standard ratio Smectite, integral width Core wireline system Grain size, sieving/settling tube X-ray diffraction TEXTUR, clay fraction CRP-2 Sampling/drilling from ice Cape Roberts Project CRP |
description |
Sediments of the CRP-2/2A drill core from the continental shelf of McMurdo Sound in Ross Sea, Pacific sector of the Southern Ocean, have been investigated for their clay mineral assemblages, especially for the smectite contents and smectite crystallinities. Highest smectite amounts and best crystallinities occur in three intervals below 485 mbsf in CRP-2/2A. They indicate deposition of sediments during a time when chemical weathering was active on large ice-free areas on the nearby Antarctic continent. In he upper part of the core, smectite contents are much lower and crystallinities are worse. This clay mineral composition indicates deposition of sediments during a time when physical weathering prevailed on an ice-covered continent. At deep-sea sites around Antarctica the shift from smectite-dominated to smectite-poor and illite-rich assemblages is well dated as earliest Oligocene, 33.9-33.1 Ma, and documents the onset of continental glaciation in East Antarctica. At CIROS-1 a corresponding shift in the ... : Supplement to: Ehrmann, Werner (2000): Smectite content and crystallinity in sediments from CRP-2/2A, Victoria Land Basin, Antarctica. Terra Antartica, 7(4), 575-580 ... |
format |
Dataset |
author |
Ehrmann, Werner |
author_facet |
Ehrmann, Werner |
author_sort |
Ehrmann, Werner |
title |
Clay and smectite analysis of sediment core CRP-2A ... |
title_short |
Clay and smectite analysis of sediment core CRP-2A ... |
title_full |
Clay and smectite analysis of sediment core CRP-2A ... |
title_fullStr |
Clay and smectite analysis of sediment core CRP-2A ... |
title_full_unstemmed |
Clay and smectite analysis of sediment core CRP-2A ... |
title_sort |
clay and smectite analysis of sediment core crp-2a ... |
publisher |
PANGAEA |
publishDate |
2000 |
url |
https://dx.doi.org/10.1594/pangaea.56138 https://doi.pangaea.de/10.1594/PANGAEA.56138 |
genre |
Antarc* Antarctic Antarctica antartic* East Antarctica McMurdo Sound Ross Sea Southern Ocean Victoria Land |
genre_facet |
Antarc* Antarctic Antarctica antartic* East Antarctica McMurdo Sound Ross Sea Southern Ocean Victoria Land |
op_rights |
Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_doi |
https://doi.org/10.1594/pangaea.56138 |
_version_ |
1810496395887509504 |