Clay mineralogy of ODP Site 188-1165
The Ocean Drilling Program Leg 188 Site 1165 was drilled on the Wild Drift on the Continental Rise off Prydz Bay, East Antarctica to a total depth of 999.1 meters below seafloor (mbsf). It recovered an extensive suite of terrigenous and hemipelagic sediments of early Miocene to Pleistocene age. Of s...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.742608 2023-05-15T13:42:10+02:00 Clay mineralogy of ODP Site 188-1165 Junttila, Juho Ruikka, Marttiina Strand, Kari O LATITUDE: -64.379583 * LONGITUDE: 67.218733 * DATE/TIME START: 2000-01-28T00:00:00 * DATE/TIME END: 2000-02-14T00:00:00 2005-06-29 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.742608 https://doi.org/10.1594/PANGAEA.742608 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.742608 https://doi.org/10.1594/PANGAEA.742608 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Junttila, Juho; Ruikka, Marttiina; Strand, Kari O (2005): Clay-mineral assemblages in high-resolution Plio-Pleistocene interval at ODP Site 1165, Prydz Bay, Antarctica. Global and Planetary Change, 45(1-3), 151-163, https://doi.org/10.1016/j.gloplacha.2004.09.007 188-1165 COMPCORE Composite Core Indian Ocean Joides Resolution Leg188 Ocean Drilling Program ODP Dataset 2005 ftpangaea https://doi.org/10.1594/PANGAEA.742608 https://doi.org/10.1016/j.gloplacha.2004.09.007 2023-01-20T07:31:50Z The Ocean Drilling Program Leg 188 Site 1165 was drilled on the Wild Drift on the Continental Rise off Prydz Bay, East Antarctica to a total depth of 999.1 meters below seafloor (mbsf). It recovered an extensive suite of terrigenous and hemipelagic sediments of early Miocene to Pleistocene age. Of special interest in this study is the sediment column between 0 and 50 mbsf, which consists of a well-preserved section of Pliocene-Pleistocene-age sediments that was sampled at 10-cm intervals. Multiproxy study of this interval could show possible intervals of expansions of the ice-sheet across the continental shelves and express the climatic evolution in Antarctica, particularly during the 'middle' Pliocene warm period (3.15 to 2.85 Ma) which may provide an indication of how the Earth responds to a rise of its surface temperature. According to the existing age model, the upper 50 mbsf stratigraphic sequence of Site 1165 reaches back to ~4.9 Ma. Throughout this interval, the clay-mineral content is characterized by fluctuations of individual clay minerals, particularly smectite and chlorite. The smectite concentration varies mainly between 0% and 30%. Illite fluctuates less between 50% and 80%, and kaolinite varies mainly between 10% and 20%. Chlorite concentrations are mainly 0% to 10%. There is also a noticeable change in magnetic susceptibility at ~34 mbsf that is clearly indicated in the composition of the clay-mineral suite. At this level, smectite decreases and illite, kaolinite and chlorite show some variability. In particular, there is a slight but persistent increase in chlorite. The results from the Plio-Pleistocene transition, with evenly fluctuating smectite and illite contents and the gradually increasing chlorite content, may indicate cooler conditions compared to the mid-Pliocene conditions. Slight increase in illite content and decrease in smectite content towards Pleistocene supports the previous assumption. The results from the mid-Pliocene with the increasing smectite content and decreasing illite ... Dataset Antarc* Antarctica East Antarctica Ice Sheet Prydz Bay PANGAEA - Data Publisher for Earth & Environmental Science East Antarctica Prydz Bay Indian ENVELOPE(67.218733,67.218733,-64.379583,-64.379583) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
188-1165 COMPCORE Composite Core Indian Ocean Joides Resolution Leg188 Ocean Drilling Program ODP |
spellingShingle |
188-1165 COMPCORE Composite Core Indian Ocean Joides Resolution Leg188 Ocean Drilling Program ODP Junttila, Juho Ruikka, Marttiina Strand, Kari O Clay mineralogy of ODP Site 188-1165 |
topic_facet |
188-1165 COMPCORE Composite Core Indian Ocean Joides Resolution Leg188 Ocean Drilling Program ODP |
description |
The Ocean Drilling Program Leg 188 Site 1165 was drilled on the Wild Drift on the Continental Rise off Prydz Bay, East Antarctica to a total depth of 999.1 meters below seafloor (mbsf). It recovered an extensive suite of terrigenous and hemipelagic sediments of early Miocene to Pleistocene age. Of special interest in this study is the sediment column between 0 and 50 mbsf, which consists of a well-preserved section of Pliocene-Pleistocene-age sediments that was sampled at 10-cm intervals. Multiproxy study of this interval could show possible intervals of expansions of the ice-sheet across the continental shelves and express the climatic evolution in Antarctica, particularly during the 'middle' Pliocene warm period (3.15 to 2.85 Ma) which may provide an indication of how the Earth responds to a rise of its surface temperature. According to the existing age model, the upper 50 mbsf stratigraphic sequence of Site 1165 reaches back to ~4.9 Ma. Throughout this interval, the clay-mineral content is characterized by fluctuations of individual clay minerals, particularly smectite and chlorite. The smectite concentration varies mainly between 0% and 30%. Illite fluctuates less between 50% and 80%, and kaolinite varies mainly between 10% and 20%. Chlorite concentrations are mainly 0% to 10%. There is also a noticeable change in magnetic susceptibility at ~34 mbsf that is clearly indicated in the composition of the clay-mineral suite. At this level, smectite decreases and illite, kaolinite and chlorite show some variability. In particular, there is a slight but persistent increase in chlorite. The results from the Plio-Pleistocene transition, with evenly fluctuating smectite and illite contents and the gradually increasing chlorite content, may indicate cooler conditions compared to the mid-Pliocene conditions. Slight increase in illite content and decrease in smectite content towards Pleistocene supports the previous assumption. The results from the mid-Pliocene with the increasing smectite content and decreasing illite ... |
format |
Dataset |
author |
Junttila, Juho Ruikka, Marttiina Strand, Kari O |
author_facet |
Junttila, Juho Ruikka, Marttiina Strand, Kari O |
author_sort |
Junttila, Juho |
title |
Clay mineralogy of ODP Site 188-1165 |
title_short |
Clay mineralogy of ODP Site 188-1165 |
title_full |
Clay mineralogy of ODP Site 188-1165 |
title_fullStr |
Clay mineralogy of ODP Site 188-1165 |
title_full_unstemmed |
Clay mineralogy of ODP Site 188-1165 |
title_sort |
clay mineralogy of odp site 188-1165 |
publisher |
PANGAEA |
publishDate |
2005 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.742608 https://doi.org/10.1594/PANGAEA.742608 |
op_coverage |
LATITUDE: -64.379583 * LONGITUDE: 67.218733 * DATE/TIME START: 2000-01-28T00:00:00 * DATE/TIME END: 2000-02-14T00:00:00 |
long_lat |
ENVELOPE(67.218733,67.218733,-64.379583,-64.379583) |
geographic |
East Antarctica Prydz Bay Indian |
geographic_facet |
East Antarctica Prydz Bay Indian |
genre |
Antarc* Antarctica East Antarctica Ice Sheet Prydz Bay |
genre_facet |
Antarc* Antarctica East Antarctica Ice Sheet Prydz Bay |
op_source |
Supplement to: Junttila, Juho; Ruikka, Marttiina; Strand, Kari O (2005): Clay-mineral assemblages in high-resolution Plio-Pleistocene interval at ODP Site 1165, Prydz Bay, Antarctica. Global and Planetary Change, 45(1-3), 151-163, https://doi.org/10.1016/j.gloplacha.2004.09.007 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.742608 https://doi.org/10.1594/PANGAEA.742608 |
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.742608 https://doi.org/10.1016/j.gloplacha.2004.09.007 |
_version_ |
1766163833711230976 |