Clay mineralogy of South Atlantic surface sediments
Surface samples, mostly from abyssal sediments of the South Atlantic, from parts of the equatorial Atlantic, and of the Antarctic Ocean, were investigated for clay content and clay mineral composition. Maps of relative clay mineral content were compiled, which improve previous maps by showing more d...
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Format: | Other/Unknown Material |
Language: | English |
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PANGAEA
1996
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Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.726293 https://doi.org/10.1594/PANGAEA.726293 |
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.726293 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
06MT15_2 Adelaide Island Agulhas Basin Agulhas Ridge Amazon Fan Angola Basin Antarctic Peninsula ANTARTIDA8611 ANT-I/2 ANT-II/3 ANT-II/4 ANT-III/3 ANT-IV/2 ANT-IV/3 ANT-IV/4 ANT-IX/2 ANT-IX/3 ANT-IX/4 ANT-V/4 ANT-VI/2 ANT-VI/3 ANT-VIII/3 ANT-VIII/5 ANT-VIII/6 ANT-X/2 ANT-X/4 ANT-X/5 ANT-X/6 ANT-XI/2 ANT-XI/4 ANT-XII/4 Anvers Island Argentine Basin Argentine Islands Astrid Ridge Atka Bay Atlantic Indik Ridge Atlantic Ridge AWI_Paleo Barents Sea BC Box corer Bransfield Strait Brazil Basin Camp Norway Cape Basin Cape Blanc Cape Fiske Congo Fan Conrad Rise |
spellingShingle |
06MT15_2 Adelaide Island Agulhas Basin Agulhas Ridge Amazon Fan Angola Basin Antarctic Peninsula ANTARTIDA8611 ANT-I/2 ANT-II/3 ANT-II/4 ANT-III/3 ANT-IV/2 ANT-IV/3 ANT-IV/4 ANT-IX/2 ANT-IX/3 ANT-IX/4 ANT-V/4 ANT-VI/2 ANT-VI/3 ANT-VIII/3 ANT-VIII/5 ANT-VIII/6 ANT-X/2 ANT-X/4 ANT-X/5 ANT-X/6 ANT-XI/2 ANT-XI/4 ANT-XII/4 Anvers Island Argentine Basin Argentine Islands Astrid Ridge Atka Bay Atlantic Indik Ridge Atlantic Ridge AWI_Paleo Barents Sea BC Box corer Bransfield Strait Brazil Basin Camp Norway Cape Basin Cape Blanc Cape Fiske Congo Fan Conrad Rise Petschick, Rainer Kuhn, Gerhard Gingele, Franz Clay mineralogy of South Atlantic surface sediments |
topic_facet |
06MT15_2 Adelaide Island Agulhas Basin Agulhas Ridge Amazon Fan Angola Basin Antarctic Peninsula ANTARTIDA8611 ANT-I/2 ANT-II/3 ANT-II/4 ANT-III/3 ANT-IV/2 ANT-IV/3 ANT-IV/4 ANT-IX/2 ANT-IX/3 ANT-IX/4 ANT-V/4 ANT-VI/2 ANT-VI/3 ANT-VIII/3 ANT-VIII/5 ANT-VIII/6 ANT-X/2 ANT-X/4 ANT-X/5 ANT-X/6 ANT-XI/2 ANT-XI/4 ANT-XII/4 Anvers Island Argentine Basin Argentine Islands Astrid Ridge Atka Bay Atlantic Indik Ridge Atlantic Ridge AWI_Paleo Barents Sea BC Box corer Bransfield Strait Brazil Basin Camp Norway Cape Basin Cape Blanc Cape Fiske Congo Fan Conrad Rise |
description |
Surface samples, mostly from abyssal sediments of the South Atlantic, from parts of the equatorial Atlantic, and of the Antarctic Ocean, were investigated for clay content and clay mineral composition. Maps of relative clay mineral content were compiled, which improve previous maps by showing more details, especially at high latitudes. Large-scale relations regarding the origin and transport paths of detrital clay are revealed. High smectite concentrations are observed in abyssal regions, primarily derived from southernmost South America and from minor sources in Southwest Africa. Near submarine volcanoes of the Antarctic Ocean (South Sandwich, Bouvet Island) smectite contents exhibit distinct maxima, which is ascribed to the weathering of altered basalts and volcanic glasses. The illite distribution can be subdivided into five major zones including two maxima revealing both South African and Antarctic sources. A particularly high amount of Mg- and Fe-rich illites are observed close to East Antarctica. They are derived from biotite-bearing crystalline rocks and transported to the west by the East Antarctic Coastal Current. Chiorite and well-crystallized dioctaedral illite are typical minerals enriched within the Subantarctic and Polarfrontal-Zone but of minor importance off East Antarctica. Kaolinite dominates the clay mineral assemblage at low latitudes, where the continental source rocks (West Africa, Brazil) are mainly affected by intensive chemical weathering. Surprisingly, a slight increase of kaolinite is observed in the Enderby Basin and near the Filchner-Ronne Ice shelf. The investigated area can be subdivided into ten, large-scale clay facies zones with characteristic possible source regions and transport paths. Clay mineral assemblages of the largest part of the South Atlantic, especially of the western basins are dominated by chlorite and illite derived from the Antarctic Peninsula and southernmost South America and supported by advection within the Circumantarctic Deep Water flow. In contrast, the ... |
format |
Other/Unknown Material |
author |
Petschick, Rainer Kuhn, Gerhard Gingele, Franz |
author_facet |
Petschick, Rainer Kuhn, Gerhard Gingele, Franz |
author_sort |
Petschick, Rainer |
title |
Clay mineralogy of South Atlantic surface sediments |
title_short |
Clay mineralogy of South Atlantic surface sediments |
title_full |
Clay mineralogy of South Atlantic surface sediments |
title_fullStr |
Clay mineralogy of South Atlantic surface sediments |
title_full_unstemmed |
Clay mineralogy of South Atlantic surface sediments |
title_sort |
clay mineralogy of south atlantic surface sediments |
publisher |
PANGAEA |
publishDate |
1996 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.726293 https://doi.org/10.1594/PANGAEA.726293 |
op_coverage |
MEDIAN LATITUDE: -51.145355 * MEDIAN LONGITUDE: -21.877778 * SOUTH-BOUND LATITUDE: -78.254000 * WEST-BOUND LONGITUDE: -98.001000 * NORTH-BOUND LATITUDE: 29.095000 * EAST-BOUND LONGITUDE: 40.868333 * DATE/TIME START: 1983-02-13T00:00:00 * DATE/TIME END: 1995-05-10T21:07:00 |
long_lat |
ENVELOPE(-98.001000,40.868333,29.095000,-78.254000) |
genre |
Adelaide Island Antarc* Antarctic Antarctic Ocean Antarctic Peninsula Antarctica Anvers Island Argentine Islands Barents Sea Bouvet Island Bransfield Strait East Antarctica Filchner Ronne Ice Shelf Filchner-Ronne Ice Shelf Ice Shelf Ronne Ice Shelf |
genre_facet |
Adelaide Island Antarc* Antarctic Antarctic Ocean Antarctic Peninsula Antarctica Anvers Island Argentine Islands Barents Sea Bouvet Island Bransfield Strait East Antarctica Filchner Ronne Ice Shelf Filchner-Ronne Ice Shelf Ice Shelf Ronne Ice Shelf |
op_source |
Supplement to: Petschick, Rainer; Kuhn, Gerhard; Gingele, Franz (1996): Clay mineral distribution in surface sediments of the South Atlantic: sources, transport, and relation to oceanography. Marine Geology, 130(3-4), 203-229, https://doi.org/10.1016/0025-3227(95)00148-4 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.726293 https://doi.org/10.1594/PANGAEA.726293 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.72629310.1016/0025-3227(95)00148-4 |
_version_ |
1810436589735641088 |
spelling |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.726293 2024-09-15T17:35:01+00:00 Clay mineralogy of South Atlantic surface sediments Petschick, Rainer Kuhn, Gerhard Gingele, Franz MEDIAN LATITUDE: -51.145355 * MEDIAN LONGITUDE: -21.877778 * SOUTH-BOUND LATITUDE: -78.254000 * WEST-BOUND LONGITUDE: -98.001000 * NORTH-BOUND LATITUDE: 29.095000 * EAST-BOUND LONGITUDE: 40.868333 * DATE/TIME START: 1983-02-13T00:00:00 * DATE/TIME END: 1995-05-10T21:07:00 1996 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.726293 https://doi.org/10.1594/PANGAEA.726293 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.726293 https://doi.org/10.1594/PANGAEA.726293 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Petschick, Rainer; Kuhn, Gerhard; Gingele, Franz (1996): Clay mineral distribution in surface sediments of the South Atlantic: sources, transport, and relation to oceanography. Marine Geology, 130(3-4), 203-229, https://doi.org/10.1016/0025-3227(95)00148-4 06MT15_2 Adelaide Island Agulhas Basin Agulhas Ridge Amazon Fan Angola Basin Antarctic Peninsula ANTARTIDA8611 ANT-I/2 ANT-II/3 ANT-II/4 ANT-III/3 ANT-IV/2 ANT-IV/3 ANT-IV/4 ANT-IX/2 ANT-IX/3 ANT-IX/4 ANT-V/4 ANT-VI/2 ANT-VI/3 ANT-VIII/3 ANT-VIII/5 ANT-VIII/6 ANT-X/2 ANT-X/4 ANT-X/5 ANT-X/6 ANT-XI/2 ANT-XI/4 ANT-XII/4 Anvers Island Argentine Basin Argentine Islands Astrid Ridge Atka Bay Atlantic Indik Ridge Atlantic Ridge AWI_Paleo Barents Sea BC Box corer Bransfield Strait Brazil Basin Camp Norway Cape Basin Cape Blanc Cape Fiske Congo Fan Conrad Rise dataset publication series 1996 ftpangaea https://doi.org/10.1594/PANGAEA.72629310.1016/0025-3227(95)00148-4 2024-08-21T00:02:25Z Surface samples, mostly from abyssal sediments of the South Atlantic, from parts of the equatorial Atlantic, and of the Antarctic Ocean, were investigated for clay content and clay mineral composition. Maps of relative clay mineral content were compiled, which improve previous maps by showing more details, especially at high latitudes. Large-scale relations regarding the origin and transport paths of detrital clay are revealed. High smectite concentrations are observed in abyssal regions, primarily derived from southernmost South America and from minor sources in Southwest Africa. Near submarine volcanoes of the Antarctic Ocean (South Sandwich, Bouvet Island) smectite contents exhibit distinct maxima, which is ascribed to the weathering of altered basalts and volcanic glasses. The illite distribution can be subdivided into five major zones including two maxima revealing both South African and Antarctic sources. A particularly high amount of Mg- and Fe-rich illites are observed close to East Antarctica. They are derived from biotite-bearing crystalline rocks and transported to the west by the East Antarctic Coastal Current. Chiorite and well-crystallized dioctaedral illite are typical minerals enriched within the Subantarctic and Polarfrontal-Zone but of minor importance off East Antarctica. Kaolinite dominates the clay mineral assemblage at low latitudes, where the continental source rocks (West Africa, Brazil) are mainly affected by intensive chemical weathering. Surprisingly, a slight increase of kaolinite is observed in the Enderby Basin and near the Filchner-Ronne Ice shelf. The investigated area can be subdivided into ten, large-scale clay facies zones with characteristic possible source regions and transport paths. Clay mineral assemblages of the largest part of the South Atlantic, especially of the western basins are dominated by chlorite and illite derived from the Antarctic Peninsula and southernmost South America and supported by advection within the Circumantarctic Deep Water flow. In contrast, the ... Other/Unknown Material Adelaide Island Antarc* Antarctic Antarctic Ocean Antarctic Peninsula Antarctica Anvers Island Argentine Islands Barents Sea Bouvet Island Bransfield Strait East Antarctica Filchner Ronne Ice Shelf Filchner-Ronne Ice Shelf Ice Shelf Ronne Ice Shelf PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-98.001000,40.868333,29.095000,-78.254000) |