Plio-Pleistocene magnetic polarity stratigraphies of ODP Leg 177 Sites from the South Atlantic, supplement to: Channell, James E T; Stoner, Joseph S (2002): Plio-Pleistocene magnetic polarity stratigraphies and diagenetic magnetite dissolution at ODP Leg 177 Sites (1089, 1091, 1093 and 1094). Marine Micropaleontology, 45(3-4), 269-290
Magnetic polarity stratigraphies from ODP Leg 177 'high resolution' sites indicate Brunhes sedimentation rates in the 12-25 cm/kyr range, with a trend of decreasing sedimentation rates with increasing age. Magnetite is the principal remanence-carrying mineral. Downcore alteration of magnet...
Main Authors: | , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
PANGAEA - Data Publisher for Earth & Environmental Science
2002
|
Subjects: | |
Online Access: | https://dx.doi.org/10.1594/pangaea.678516 https://doi.pangaea.de/10.1594/PANGAEA.678516 |
id |
ftdatacite:10.1594/pangaea.678516 |
---|---|
record_format |
openpolar |
spelling |
ftdatacite:10.1594/pangaea.678516 2023-05-15T18:25:38+02:00 Plio-Pleistocene magnetic polarity stratigraphies of ODP Leg 177 Sites from the South Atlantic, supplement to: Channell, James E T; Stoner, Joseph S (2002): Plio-Pleistocene magnetic polarity stratigraphies and diagenetic magnetite dissolution at ODP Leg 177 Sites (1089, 1091, 1093 and 1094). Marine Micropaleontology, 45(3-4), 269-290 Channell, James E T Stoner, Joseph S 2002 application/zip https://dx.doi.org/10.1594/pangaea.678516 https://doi.pangaea.de/10.1594/PANGAEA.678516 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.1016/s0377-8398(02)00032-4 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY Composite Core Leg177 Joides Resolution Ocean Drilling Program ODP Supplementary Collection of Datasets Collection article 2002 ftdatacite https://doi.org/10.1594/pangaea.678516 https://doi.org/10.1016/s0377-8398(02)00032-4 2022-02-08T16:24:46Z Magnetic polarity stratigraphies from ODP Leg 177 'high resolution' sites indicate Brunhes sedimentation rates in the 12-25 cm/kyr range, with a trend of decreasing sedimentation rates with increasing age. Magnetite is the principal remanence-carrying mineral. Downcore alteration of magnetite and authigenic growth of iron sulfides introduces a high coercivity diagenetic remanence carrier (pyrrhotite). The change in pore water sulfate with depth in the sediment tends to be in step with the decrease in magnetization intensity, indicating the link between sulfate reduction and magnetite dissolution. Shipboard pass-through magnetometer data are generally very noisy due to a combination of weak magnetization intensities, drilling-related core deformation, and the influence of authigenic iron sulfides. Post-cruise progressive demagnetization of discrete samples aids the magnetostratigraphic interpretation, as these measurements are less influenced by low magnetization intensities and drilling-related deformation. The magnetostratigraphic interpretations provide much-needed calibration for biostratigraphic events in the high latitude southern oceans. Apart from the ODP Hole 745B (Kerguelen Plateau), published Plio-Pleistocene magnetostratigraphies from ODP sites in the Southern Ocean are poorly constrained. For this reason, we compare interpolated ages of 11 radiolarian events and one diatom event that occur at Hole 745B and Leg 177 sites. Article in Journal/Newspaper Southern Ocean DataCite Metadata Store (German National Library of Science and Technology) Kerguelen Southern Ocean |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Composite Core Leg177 Joides Resolution Ocean Drilling Program ODP |
spellingShingle |
Composite Core Leg177 Joides Resolution Ocean Drilling Program ODP Channell, James E T Stoner, Joseph S Plio-Pleistocene magnetic polarity stratigraphies of ODP Leg 177 Sites from the South Atlantic, supplement to: Channell, James E T; Stoner, Joseph S (2002): Plio-Pleistocene magnetic polarity stratigraphies and diagenetic magnetite dissolution at ODP Leg 177 Sites (1089, 1091, 1093 and 1094). Marine Micropaleontology, 45(3-4), 269-290 |
topic_facet |
Composite Core Leg177 Joides Resolution Ocean Drilling Program ODP |
description |
Magnetic polarity stratigraphies from ODP Leg 177 'high resolution' sites indicate Brunhes sedimentation rates in the 12-25 cm/kyr range, with a trend of decreasing sedimentation rates with increasing age. Magnetite is the principal remanence-carrying mineral. Downcore alteration of magnetite and authigenic growth of iron sulfides introduces a high coercivity diagenetic remanence carrier (pyrrhotite). The change in pore water sulfate with depth in the sediment tends to be in step with the decrease in magnetization intensity, indicating the link between sulfate reduction and magnetite dissolution. Shipboard pass-through magnetometer data are generally very noisy due to a combination of weak magnetization intensities, drilling-related core deformation, and the influence of authigenic iron sulfides. Post-cruise progressive demagnetization of discrete samples aids the magnetostratigraphic interpretation, as these measurements are less influenced by low magnetization intensities and drilling-related deformation. The magnetostratigraphic interpretations provide much-needed calibration for biostratigraphic events in the high latitude southern oceans. Apart from the ODP Hole 745B (Kerguelen Plateau), published Plio-Pleistocene magnetostratigraphies from ODP sites in the Southern Ocean are poorly constrained. For this reason, we compare interpolated ages of 11 radiolarian events and one diatom event that occur at Hole 745B and Leg 177 sites. |
format |
Article in Journal/Newspaper |
author |
Channell, James E T Stoner, Joseph S |
author_facet |
Channell, James E T Stoner, Joseph S |
author_sort |
Channell, James E T |
title |
Plio-Pleistocene magnetic polarity stratigraphies of ODP Leg 177 Sites from the South Atlantic, supplement to: Channell, James E T; Stoner, Joseph S (2002): Plio-Pleistocene magnetic polarity stratigraphies and diagenetic magnetite dissolution at ODP Leg 177 Sites (1089, 1091, 1093 and 1094). Marine Micropaleontology, 45(3-4), 269-290 |
title_short |
Plio-Pleistocene magnetic polarity stratigraphies of ODP Leg 177 Sites from the South Atlantic, supplement to: Channell, James E T; Stoner, Joseph S (2002): Plio-Pleistocene magnetic polarity stratigraphies and diagenetic magnetite dissolution at ODP Leg 177 Sites (1089, 1091, 1093 and 1094). Marine Micropaleontology, 45(3-4), 269-290 |
title_full |
Plio-Pleistocene magnetic polarity stratigraphies of ODP Leg 177 Sites from the South Atlantic, supplement to: Channell, James E T; Stoner, Joseph S (2002): Plio-Pleistocene magnetic polarity stratigraphies and diagenetic magnetite dissolution at ODP Leg 177 Sites (1089, 1091, 1093 and 1094). Marine Micropaleontology, 45(3-4), 269-290 |
title_fullStr |
Plio-Pleistocene magnetic polarity stratigraphies of ODP Leg 177 Sites from the South Atlantic, supplement to: Channell, James E T; Stoner, Joseph S (2002): Plio-Pleistocene magnetic polarity stratigraphies and diagenetic magnetite dissolution at ODP Leg 177 Sites (1089, 1091, 1093 and 1094). Marine Micropaleontology, 45(3-4), 269-290 |
title_full_unstemmed |
Plio-Pleistocene magnetic polarity stratigraphies of ODP Leg 177 Sites from the South Atlantic, supplement to: Channell, James E T; Stoner, Joseph S (2002): Plio-Pleistocene magnetic polarity stratigraphies and diagenetic magnetite dissolution at ODP Leg 177 Sites (1089, 1091, 1093 and 1094). Marine Micropaleontology, 45(3-4), 269-290 |
title_sort |
plio-pleistocene magnetic polarity stratigraphies of odp leg 177 sites from the south atlantic, supplement to: channell, james e t; stoner, joseph s (2002): plio-pleistocene magnetic polarity stratigraphies and diagenetic magnetite dissolution at odp leg 177 sites (1089, 1091, 1093 and 1094). marine micropaleontology, 45(3-4), 269-290 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
2002 |
url |
https://dx.doi.org/10.1594/pangaea.678516 https://doi.pangaea.de/10.1594/PANGAEA.678516 |
geographic |
Kerguelen Southern Ocean |
geographic_facet |
Kerguelen Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_relation |
https://dx.doi.org/10.1016/s0377-8398(02)00032-4 |
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.678516 https://doi.org/10.1016/s0377-8398(02)00032-4 |
_version_ |
1766207219560349696 |