Sedimentological investigation on 4 cores from the Antarctic continental margin
Sedimentary sequences spanning early Oligocene and Neogene time intervals were recovered with piston and gravity cores along erosional structures at northern Gunnerus Ridge and Kainan Maru Seamount in the southernmost Indian Ocean. Results of sedimentological investigations help to reconstruct the C...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.734001 2023-05-15T13:42:09+02:00 Sedimentological investigation on 4 cores from the Antarctic continental margin Hillenbrand, Claus-Dieter Ehrmann, Werner MEDIAN LATITUDE: -65.505495 * MEDIAN LONGITUDE: 33.585413 * SOUTH-BOUND LATITUDE: -66.087330 * WEST-BOUND LONGITUDE: 33.282330 * NORTH-BOUND LATITUDE: -64.919830 * EAST-BOUND LONGITUDE: 33.714330 * DATE/TIME START: 1990-03-26T10:31:00 * DATE/TIME END: 1990-03-29T01:41:00 2003-04-15 application/zip, 4 datasets https://doi.pangaea.de/10.1594/PANGAEA.734001 https://doi.org/10.1594/PANGAEA.734001 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.734001 https://doi.org/10.1594/PANGAEA.734001 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Hillenbrand, Claus-Dieter; Ehrmann, Werner (2003): Palaeoenvironmental Implications from Tertiary Sediments of Kainan Maru Seamount and Northern Gunnerus Ridge. Antarctic Science, 15, 522-536, https://doi.org/10.1017/S0954102003001640 ANT-VIII/6 AWI_Paleo Gravity corer (Kiel type) Gunnerus Ridge Kainan Maru Seamount KL Paleoenvironmental Reconstructions from Marine Sediments @ AWI Piston corer (BGR type) Polarstern PS16 PS16/515 PS16/516 PS16/518 PS16/522 PS1811-8 PS1812-6 PS1813-6 PS1816-1 SL Dataset 2003 ftpangaea https://doi.org/10.1594/PANGAEA.734001 https://doi.org/10.1017/S0954102003001640 2023-01-20T07:31:39Z Sedimentary sequences spanning early Oligocene and Neogene time intervals were recovered with piston and gravity cores along erosional structures at northern Gunnerus Ridge and Kainan Maru Seamount in the southernmost Indian Ocean. Results of sedimentological investigations help to reconstruct the Cenozoic palaeoenvironment. Main emphasis was placed on grain size and clay mineral data. The clay mineral assemblages are dominated by illite and smectite. Chlorite and kaolinite occur in trace amounts. Whereas illite has a distinct source on the East Antarctic craton, smectite is of somewhat speculative origin, but probably is derived from erosion of Cenozoic or older shelf sediments. The presence of terrigenous sand indicates that ice-rafting was active throughout the time represented by the investigated cores, although with varying intensity. During the early Oligocene interval (30.1–29.0 Ma), siliceous phytoplankton production dominated sedimentation. Environmental conditions were quite different from those on Maud Rise and Kerguelen Plateau. The middle Miocene sedimentary sequence (14.1–12.8 Ma) documents an intensification of East Antarctic glaciation. The sediments deposited during the late Miocene interval (8.7–6.5 Ma) and the Pliocene interval (5.1–2.7 Ma) indicate continued cooling of Antarctica, but a more dynamic Antarctic ice sheet resulting in episodic sedimentation patterns. Dataset Antarc* Antarctic Antarctic Science Antarctica Ice Sheet PANGAEA - Data Publisher for Earth & Environmental Science Antarctic The Antarctic Kerguelen Indian Maud Rise ENVELOPE(3.000,3.000,-66.000,-66.000) Gunnerus Ridge ENVELOPE(33.750,33.750,-66.500,-66.500) Kainan Maru Seamount ENVELOPE(34.433,34.433,-65.233,-65.233) ENVELOPE(33.282330,33.714330,-64.919830,-66.087330) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
ANT-VIII/6 AWI_Paleo Gravity corer (Kiel type) Gunnerus Ridge Kainan Maru Seamount KL Paleoenvironmental Reconstructions from Marine Sediments @ AWI Piston corer (BGR type) Polarstern PS16 PS16/515 PS16/516 PS16/518 PS16/522 PS1811-8 PS1812-6 PS1813-6 PS1816-1 SL |
spellingShingle |
ANT-VIII/6 AWI_Paleo Gravity corer (Kiel type) Gunnerus Ridge Kainan Maru Seamount KL Paleoenvironmental Reconstructions from Marine Sediments @ AWI Piston corer (BGR type) Polarstern PS16 PS16/515 PS16/516 PS16/518 PS16/522 PS1811-8 PS1812-6 PS1813-6 PS1816-1 SL Hillenbrand, Claus-Dieter Ehrmann, Werner Sedimentological investigation on 4 cores from the Antarctic continental margin |
topic_facet |
ANT-VIII/6 AWI_Paleo Gravity corer (Kiel type) Gunnerus Ridge Kainan Maru Seamount KL Paleoenvironmental Reconstructions from Marine Sediments @ AWI Piston corer (BGR type) Polarstern PS16 PS16/515 PS16/516 PS16/518 PS16/522 PS1811-8 PS1812-6 PS1813-6 PS1816-1 SL |
description |
Sedimentary sequences spanning early Oligocene and Neogene time intervals were recovered with piston and gravity cores along erosional structures at northern Gunnerus Ridge and Kainan Maru Seamount in the southernmost Indian Ocean. Results of sedimentological investigations help to reconstruct the Cenozoic palaeoenvironment. Main emphasis was placed on grain size and clay mineral data. The clay mineral assemblages are dominated by illite and smectite. Chlorite and kaolinite occur in trace amounts. Whereas illite has a distinct source on the East Antarctic craton, smectite is of somewhat speculative origin, but probably is derived from erosion of Cenozoic or older shelf sediments. The presence of terrigenous sand indicates that ice-rafting was active throughout the time represented by the investigated cores, although with varying intensity. During the early Oligocene interval (30.1–29.0 Ma), siliceous phytoplankton production dominated sedimentation. Environmental conditions were quite different from those on Maud Rise and Kerguelen Plateau. The middle Miocene sedimentary sequence (14.1–12.8 Ma) documents an intensification of East Antarctic glaciation. The sediments deposited during the late Miocene interval (8.7–6.5 Ma) and the Pliocene interval (5.1–2.7 Ma) indicate continued cooling of Antarctica, but a more dynamic Antarctic ice sheet resulting in episodic sedimentation patterns. |
format |
Dataset |
author |
Hillenbrand, Claus-Dieter Ehrmann, Werner |
author_facet |
Hillenbrand, Claus-Dieter Ehrmann, Werner |
author_sort |
Hillenbrand, Claus-Dieter |
title |
Sedimentological investigation on 4 cores from the Antarctic continental margin |
title_short |
Sedimentological investigation on 4 cores from the Antarctic continental margin |
title_full |
Sedimentological investigation on 4 cores from the Antarctic continental margin |
title_fullStr |
Sedimentological investigation on 4 cores from the Antarctic continental margin |
title_full_unstemmed |
Sedimentological investigation on 4 cores from the Antarctic continental margin |
title_sort |
sedimentological investigation on 4 cores from the antarctic continental margin |
publisher |
PANGAEA |
publishDate |
2003 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.734001 https://doi.org/10.1594/PANGAEA.734001 |
op_coverage |
MEDIAN LATITUDE: -65.505495 * MEDIAN LONGITUDE: 33.585413 * SOUTH-BOUND LATITUDE: -66.087330 * WEST-BOUND LONGITUDE: 33.282330 * NORTH-BOUND LATITUDE: -64.919830 * EAST-BOUND LONGITUDE: 33.714330 * DATE/TIME START: 1990-03-26T10:31:00 * DATE/TIME END: 1990-03-29T01:41:00 |
long_lat |
ENVELOPE(3.000,3.000,-66.000,-66.000) ENVELOPE(33.750,33.750,-66.500,-66.500) ENVELOPE(34.433,34.433,-65.233,-65.233) ENVELOPE(33.282330,33.714330,-64.919830,-66.087330) |
geographic |
Antarctic The Antarctic Kerguelen Indian Maud Rise Gunnerus Ridge Kainan Maru Seamount |
geographic_facet |
Antarctic The Antarctic Kerguelen Indian Maud Rise Gunnerus Ridge Kainan Maru Seamount |
genre |
Antarc* Antarctic Antarctic Science Antarctica Ice Sheet |
genre_facet |
Antarc* Antarctic Antarctic Science Antarctica Ice Sheet |
op_source |
Supplement to: Hillenbrand, Claus-Dieter; Ehrmann, Werner (2003): Palaeoenvironmental Implications from Tertiary Sediments of Kainan Maru Seamount and Northern Gunnerus Ridge. Antarctic Science, 15, 522-536, https://doi.org/10.1017/S0954102003001640 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.734001 https://doi.org/10.1594/PANGAEA.734001 |
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.734001 https://doi.org/10.1017/S0954102003001640 |
_version_ |
1766163680223821824 |