Clay mineralogy of sediment core CRP-1, supplement to: Ehrmann, Werner (1998): Lower Miocene and Quaternary clay mineral assemblages from CRP-1. Terra Antartica, 5(3), 613-619
Clay mineral assemblages in lower Miocene and Quaternary sediments recovered at the CRP-1 drillsite, McMurdo Sound shelf, Antarctica, were analysed in order to reconstruct source areas of the sediments and late Cenozoic Antarctic icedynamics. The assemblages are dominated by smectite, illite and chl...
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1998
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ftdatacite:10.1594/pangaea.54627 2023-05-15T13:47:06+02:00 Clay mineralogy of sediment core CRP-1, supplement to: Ehrmann, Werner (1998): Lower Miocene and Quaternary clay mineral assemblages from CRP-1. Terra Antartica, 5(3), 613-619 Ehrmann, Werner 1998 text/tab-separated-values https://dx.doi.org/10.1594/pangaea.54627 https://doi.pangaea.de/10.1594/PANGAEA.54627 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 Size fraction < 0.002 mm, clay Smectite Illite Chlorite Kaolinite Smectite, integral width Illite, integral width Illite 5Å/10Å Esquevin-index Illite position 10Å Core wireline system Grain size, sieving/settling tube X-ray diffraction TEXTUR, clay fraction CRP-1 Sampling/drilling ice Cape Roberts Project CRP Supplementary Dataset dataset Dataset 1998 ftdatacite https://doi.org/10.1594/pangaea.54627 2021-11-05T12:55:41Z Clay mineral assemblages in lower Miocene and Quaternary sediments recovered at the CRP-1 drillsite, McMurdo Sound shelf, Antarctica, were analysed in order to reconstruct source areas of the sediments and late Cenozoic Antarctic icedynamics. The assemblages are dominated by smectite, illite and chlorite. Kaolinite occurs in trace amounts only. The lower part of the drillcore, below c. 70 mbsf, is characterised by high illite and chlorite, but low smectite concentrations. This assemblage is typical of a source consisting mainly of granitic and metamorphic rocks, such as are widespread in the Transantarctic Mountains and on the East Antarctic craton. In contrast, the upper c. 70 mbsf of the core is characterised by three intervals with high smectite, but low illite and chlorite concentrations at around 59, 45 and 33 mbsf. The smectite-rich assemblage is typical of a hinterland composed of volcanic rocks, such as are found in the region of the present-day Ross Ice Shelf. The clay minerals are mainly detrital and therefore document the changing influence of different source areas through time. Correlation of the clay mineral record of CRP-1 with that of the CIROS-1 and MSSTS-1 cores implies that the oldest sediments at CRP-1 are younger than 21.8 Ma, and that there is no overlap between CRP-l and the other cores. Dataset Antarc* Antarctic Antarctica antartic* Ice Shelf McMurdo Sound Ross Ice Shelf DataCite Metadata Store (German National Library of Science and Technology) Antarctic McMurdo Sound Ross Ice Shelf Transantarctic Mountains 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 Size fraction < 0.002 mm, clay Smectite Illite Chlorite Kaolinite Smectite, integral width Illite, integral width Illite 5Å/10Å Esquevin-index Illite position 10Å Core wireline system Grain size, sieving/settling tube X-ray diffraction TEXTUR, clay fraction CRP-1 Sampling/drilling ice Cape Roberts Project CRP |
spellingShingle |
DEPTH, sediment/rock Size fraction < 0.002 mm, clay Smectite Illite Chlorite Kaolinite Smectite, integral width Illite, integral width Illite 5Å/10Å Esquevin-index Illite position 10Å Core wireline system Grain size, sieving/settling tube X-ray diffraction TEXTUR, clay fraction CRP-1 Sampling/drilling ice Cape Roberts Project CRP Ehrmann, Werner Clay mineralogy of sediment core CRP-1, supplement to: Ehrmann, Werner (1998): Lower Miocene and Quaternary clay mineral assemblages from CRP-1. Terra Antartica, 5(3), 613-619 |
topic_facet |
DEPTH, sediment/rock Size fraction < 0.002 mm, clay Smectite Illite Chlorite Kaolinite Smectite, integral width Illite, integral width Illite 5Å/10Å Esquevin-index Illite position 10Å Core wireline system Grain size, sieving/settling tube X-ray diffraction TEXTUR, clay fraction CRP-1 Sampling/drilling ice Cape Roberts Project CRP |
description |
Clay mineral assemblages in lower Miocene and Quaternary sediments recovered at the CRP-1 drillsite, McMurdo Sound shelf, Antarctica, were analysed in order to reconstruct source areas of the sediments and late Cenozoic Antarctic icedynamics. The assemblages are dominated by smectite, illite and chlorite. Kaolinite occurs in trace amounts only. The lower part of the drillcore, below c. 70 mbsf, is characterised by high illite and chlorite, but low smectite concentrations. This assemblage is typical of a source consisting mainly of granitic and metamorphic rocks, such as are widespread in the Transantarctic Mountains and on the East Antarctic craton. In contrast, the upper c. 70 mbsf of the core is characterised by three intervals with high smectite, but low illite and chlorite concentrations at around 59, 45 and 33 mbsf. The smectite-rich assemblage is typical of a hinterland composed of volcanic rocks, such as are found in the region of the present-day Ross Ice Shelf. The clay minerals are mainly detrital and therefore document the changing influence of different source areas through time. Correlation of the clay mineral record of CRP-1 with that of the CIROS-1 and MSSTS-1 cores implies that the oldest sediments at CRP-1 are younger than 21.8 Ma, and that there is no overlap between CRP-l and the other cores. |
format |
Dataset |
author |
Ehrmann, Werner |
author_facet |
Ehrmann, Werner |
author_sort |
Ehrmann, Werner |
title |
Clay mineralogy of sediment core CRP-1, supplement to: Ehrmann, Werner (1998): Lower Miocene and Quaternary clay mineral assemblages from CRP-1. Terra Antartica, 5(3), 613-619 |
title_short |
Clay mineralogy of sediment core CRP-1, supplement to: Ehrmann, Werner (1998): Lower Miocene and Quaternary clay mineral assemblages from CRP-1. Terra Antartica, 5(3), 613-619 |
title_full |
Clay mineralogy of sediment core CRP-1, supplement to: Ehrmann, Werner (1998): Lower Miocene and Quaternary clay mineral assemblages from CRP-1. Terra Antartica, 5(3), 613-619 |
title_fullStr |
Clay mineralogy of sediment core CRP-1, supplement to: Ehrmann, Werner (1998): Lower Miocene and Quaternary clay mineral assemblages from CRP-1. Terra Antartica, 5(3), 613-619 |
title_full_unstemmed |
Clay mineralogy of sediment core CRP-1, supplement to: Ehrmann, Werner (1998): Lower Miocene and Quaternary clay mineral assemblages from CRP-1. Terra Antartica, 5(3), 613-619 |
title_sort |
clay mineralogy of sediment core crp-1, supplement to: ehrmann, werner (1998): lower miocene and quaternary clay mineral assemblages from crp-1. terra antartica, 5(3), 613-619 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
1998 |
url |
https://dx.doi.org/10.1594/pangaea.54627 https://doi.pangaea.de/10.1594/PANGAEA.54627 |
long_lat |
ENVELOPE(-70.467,-70.467,-68.950,-68.950) |
geographic |
Antarctic McMurdo Sound Ross Ice Shelf Transantarctic Mountains Cape Roberts |
geographic_facet |
Antarctic McMurdo Sound Ross Ice Shelf Transantarctic Mountains Cape Roberts |
genre |
Antarc* Antarctic Antarctica antartic* Ice Shelf McMurdo Sound Ross Ice Shelf |
genre_facet |
Antarc* Antarctic Antarctica antartic* Ice Shelf McMurdo Sound Ross Ice Shelf |
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.54627 |
_version_ |
1766246338300739584 |