Diatom abundance index and biogenic opal content for ODP Leg 175 holes, supplement to: Lange, Carina Beatriz; Berger, Wolfgang H; Lin, Hui-Ling; Wefer, Gerold; Shipboard Scientific Party (1999): The early Matuyama diatom maximum off SW Africa, Benguela Current System (ODP Leg 175). Marine Geology, 161(2-4), 93-114
Several sites of Ocean Drilling Program Leg 175 between 20° and 30°S (1081, 1082, 1083, 1084 and 1085) in the Benguela Current system show a distinct opal (and diatom) maximum within the late Pliocene and early Quaternary, spanning the lower half of the Matuyama reversed polarity Chron (MDM, Matuyam...
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ftdatacite:10.1594/pangaea.735178 2023-05-15T13:40:55+02:00 Diatom abundance index and biogenic opal content for ODP Leg 175 holes, supplement to: Lange, Carina Beatriz; Berger, Wolfgang H; Lin, Hui-Ling; Wefer, Gerold; Shipboard Scientific Party (1999): The early Matuyama diatom maximum off SW Africa, Benguela Current System (ODP Leg 175). Marine Geology, 161(2-4), 93-114 Lange, Carina Beatriz Berger, Wolfgang H Lin, Hui-Ling Wefer, Gerold Shipboard Scientific Party 1999 application/zip https://dx.doi.org/10.1594/pangaea.735178 https://doi.pangaea.de/10.1594/PANGAEA.735178 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.1016/s0025-3227(99)00081-x Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY Drilling/drill rig Leg175 Joides Resolution Ocean Drilling Program ODP Supplementary Collection of Datasets Collection article 1999 ftdatacite https://doi.org/10.1594/pangaea.735178 https://doi.org/10.1016/s0025-3227(99)00081-x 2022-02-08T16:24:46Z Several sites of Ocean Drilling Program Leg 175 between 20° and 30°S (1081, 1082, 1083, 1084 and 1085) in the Benguela Current system show a distinct opal (and diatom) maximum within the late Pliocene and early Quaternary, spanning the lower half of the Matuyama reversed polarity Chron (MDM, Matuyama Diatom Maximum). This maximum is centered around 2.0-2.6 Ma, and follows a rapid increase of diatom deposition near 3.1 Ma. Within the MDM, we recognized intervals dominated by the antarctic/subantarctic species Thalassiothrix antarctica which have the aspect of diatom mats. The MDM (and the mats) developed during a time of sustained Southern Ocean influence (3.2-1.6 Ma), probably reflecting a period of seasonally-pulsed continuous advection of subantarctic waters into the Benguela Oceanic Current. The onset and cessation of the MDM raises questions about modes in the operation of the silica cycle and the relation of these to major oceanographic events. A depositional model for the late Pliocene is proposed which involves positional changes in a longshore system of fronts, substantial equatorward excursions of subantarctic waters during MDM time, and subsurface waters greatly enriched in silicate. Article in Journal/Newspaper Antarc* Antarctic Antarctica Southern Ocean DataCite Metadata Store (German National Library of Science and Technology) Antarctic Southern Ocean The Antarctic |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Drilling/drill rig Leg175 Joides Resolution Ocean Drilling Program ODP |
spellingShingle |
Drilling/drill rig Leg175 Joides Resolution Ocean Drilling Program ODP Lange, Carina Beatriz Berger, Wolfgang H Lin, Hui-Ling Wefer, Gerold Shipboard Scientific Party Diatom abundance index and biogenic opal content for ODP Leg 175 holes, supplement to: Lange, Carina Beatriz; Berger, Wolfgang H; Lin, Hui-Ling; Wefer, Gerold; Shipboard Scientific Party (1999): The early Matuyama diatom maximum off SW Africa, Benguela Current System (ODP Leg 175). Marine Geology, 161(2-4), 93-114 |
topic_facet |
Drilling/drill rig Leg175 Joides Resolution Ocean Drilling Program ODP |
description |
Several sites of Ocean Drilling Program Leg 175 between 20° and 30°S (1081, 1082, 1083, 1084 and 1085) in the Benguela Current system show a distinct opal (and diatom) maximum within the late Pliocene and early Quaternary, spanning the lower half of the Matuyama reversed polarity Chron (MDM, Matuyama Diatom Maximum). This maximum is centered around 2.0-2.6 Ma, and follows a rapid increase of diatom deposition near 3.1 Ma. Within the MDM, we recognized intervals dominated by the antarctic/subantarctic species Thalassiothrix antarctica which have the aspect of diatom mats. The MDM (and the mats) developed during a time of sustained Southern Ocean influence (3.2-1.6 Ma), probably reflecting a period of seasonally-pulsed continuous advection of subantarctic waters into the Benguela Oceanic Current. The onset and cessation of the MDM raises questions about modes in the operation of the silica cycle and the relation of these to major oceanographic events. A depositional model for the late Pliocene is proposed which involves positional changes in a longshore system of fronts, substantial equatorward excursions of subantarctic waters during MDM time, and subsurface waters greatly enriched in silicate. |
format |
Article in Journal/Newspaper |
author |
Lange, Carina Beatriz Berger, Wolfgang H Lin, Hui-Ling Wefer, Gerold Shipboard Scientific Party |
author_facet |
Lange, Carina Beatriz Berger, Wolfgang H Lin, Hui-Ling Wefer, Gerold Shipboard Scientific Party |
author_sort |
Lange, Carina Beatriz |
title |
Diatom abundance index and biogenic opal content for ODP Leg 175 holes, supplement to: Lange, Carina Beatriz; Berger, Wolfgang H; Lin, Hui-Ling; Wefer, Gerold; Shipboard Scientific Party (1999): The early Matuyama diatom maximum off SW Africa, Benguela Current System (ODP Leg 175). Marine Geology, 161(2-4), 93-114 |
title_short |
Diatom abundance index and biogenic opal content for ODP Leg 175 holes, supplement to: Lange, Carina Beatriz; Berger, Wolfgang H; Lin, Hui-Ling; Wefer, Gerold; Shipboard Scientific Party (1999): The early Matuyama diatom maximum off SW Africa, Benguela Current System (ODP Leg 175). Marine Geology, 161(2-4), 93-114 |
title_full |
Diatom abundance index and biogenic opal content for ODP Leg 175 holes, supplement to: Lange, Carina Beatriz; Berger, Wolfgang H; Lin, Hui-Ling; Wefer, Gerold; Shipboard Scientific Party (1999): The early Matuyama diatom maximum off SW Africa, Benguela Current System (ODP Leg 175). Marine Geology, 161(2-4), 93-114 |
title_fullStr |
Diatom abundance index and biogenic opal content for ODP Leg 175 holes, supplement to: Lange, Carina Beatriz; Berger, Wolfgang H; Lin, Hui-Ling; Wefer, Gerold; Shipboard Scientific Party (1999): The early Matuyama diatom maximum off SW Africa, Benguela Current System (ODP Leg 175). Marine Geology, 161(2-4), 93-114 |
title_full_unstemmed |
Diatom abundance index and biogenic opal content for ODP Leg 175 holes, supplement to: Lange, Carina Beatriz; Berger, Wolfgang H; Lin, Hui-Ling; Wefer, Gerold; Shipboard Scientific Party (1999): The early Matuyama diatom maximum off SW Africa, Benguela Current System (ODP Leg 175). Marine Geology, 161(2-4), 93-114 |
title_sort |
diatom abundance index and biogenic opal content for odp leg 175 holes, supplement to: lange, carina beatriz; berger, wolfgang h; lin, hui-ling; wefer, gerold; shipboard scientific party (1999): the early matuyama diatom maximum off sw africa, benguela current system (odp leg 175). marine geology, 161(2-4), 93-114 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
1999 |
url |
https://dx.doi.org/10.1594/pangaea.735178 https://doi.pangaea.de/10.1594/PANGAEA.735178 |
geographic |
Antarctic Southern Ocean The Antarctic |
geographic_facet |
Antarctic Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Antarctica Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica Southern Ocean |
op_relation |
https://dx.doi.org/10.1016/s0025-3227(99)00081-x |
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.735178 https://doi.org/10.1016/s0025-3227(99)00081-x |
_version_ |
1766143284301791232 |