(Table T1) Ice rafted debris characteristics of ODP Site 177-1092, supplement to: Murphy, L; Warnke, Detlef A (2002): Data Report: Ice-rafted debris of the Pliocene portion of ODP Site 1092. In: Gersonde, R; Hodell, DA; Blum, P (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 177, 1-6
We have carried out a multiphase analysis of samples from ODP Site 177-1092, Meteor Rise, subantarctic South Atlantic. Samples were analyzed for ice-rafted debris (IRD [see Table T1]) and stable isotopes from benthic foraminifera [see Murphy et al., 2002, doi:10.1016/S0031-0182(01)00495-3]. Both ana...
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Online Access: | https://dx.doi.org/10.1594/pangaea.787347 https://doi.pangaea.de/10.1594/PANGAEA.787347 |
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ftdatacite:10.1594/pangaea.787347 2023-05-15T13:51:18+02:00 (Table T1) Ice rafted debris characteristics of ODP Site 177-1092, supplement to: Murphy, L; Warnke, Detlef A (2002): Data Report: Ice-rafted debris of the Pliocene portion of ODP Site 1092. In: Gersonde, R; Hodell, DA; Blum, P (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 177, 1-6 Murphy, L Warnke, Detlef A 2002 text/tab-separated-values https://dx.doi.org/10.1594/pangaea.787347 https://doi.pangaea.de/10.1594/PANGAEA.787347 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.2973/odp.proc.sr.177.111.2001 https://dx.doi.org/10.1016/s0031-0182(01)00495-3 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY DEPTH, sediment/rock Ice rafted debris Ice rafted debris, general Composite Core Leg177 Joides Resolution Ocean Drilling Program ODP Supplementary Dataset dataset Dataset 2002 ftdatacite https://doi.org/10.1594/pangaea.787347 https://doi.org/10.2973/odp.proc.sr.177.111.2001 https://doi.org/10.1016/s0031-0182(01)00495-3 2022-02-08T16:24:46Z We have carried out a multiphase analysis of samples from ODP Site 177-1092, Meteor Rise, subantarctic South Atlantic. Samples were analyzed for ice-rafted debris (IRD [see Table T1]) and stable isotopes from benthic foraminifera [see Murphy et al., 2002, doi:10.1016/S0031-0182(01)00495-3]. Both analyses were performed on the same samples. Additional work was performed to identify the paleomagnetic stratigraphy. The analyzed samples range in age from about 2.6(?) Ma to 4.6 Ma, a time span that saw considerable global warmth, but witnessed overall global refrigeration and the transition to truly bipolar glaciations.IRD arrived frequently during the Early and early Late Pliocene, but only as 'background rafting' (occasional grains per sample). The first identifiable IRD above background rafting is associated with marine isotope stage (MIS) KM4 (~3.18 Ma). Successive IRD peaks become larger, the same pattern as noted at nearby Site 114-704. A very large peak near the top of the record, approximately 2.8 Ma, is considered to represent a hiatus. Peaks below 51.3 meters composite depth (mcd) coincide with positive excursions of the oxygen isotopic record, and with negative excursions of the carbon isotopic curve, a pattern also noted at Site 114-704. However, the reasonably large IRD peak at 51 mcd (tentatively identified with MIS G11) coincides with a positive excursion on the carbon isotopic curve and negative excursion on the oxygen isotopic curve. This relationship suggests a northern hemisphere interglacial, rising sea level, destabilization of the Antarctic margin, and delivery of Antarctic icebergs to the Southern Ocean. Such a mechanism has recently been suggested by Kanfoush et al. (2000, doi:10.1126/science.288.5472.1815) for latest Pleistocene stadial/interstadial oscillations. Here we suggest that such a mechanism may have been in place on glacial/interglacial time scales as early as the Late Pliocene. : Sediment depth is given in mcd. Dataset Antarc* Antarctic Iceberg* Southern Ocean DataCite Metadata Store (German National Library of Science and Technology) Antarctic Southern Ocean The Antarctic Warnke ENVELOPE(-64.833,-64.833,-84.333,-84.333) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
DEPTH, sediment/rock Ice rafted debris Ice rafted debris, general Composite Core Leg177 Joides Resolution Ocean Drilling Program ODP |
spellingShingle |
DEPTH, sediment/rock Ice rafted debris Ice rafted debris, general Composite Core Leg177 Joides Resolution Ocean Drilling Program ODP Murphy, L Warnke, Detlef A (Table T1) Ice rafted debris characteristics of ODP Site 177-1092, supplement to: Murphy, L; Warnke, Detlef A (2002): Data Report: Ice-rafted debris of the Pliocene portion of ODP Site 1092. In: Gersonde, R; Hodell, DA; Blum, P (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 177, 1-6 |
topic_facet |
DEPTH, sediment/rock Ice rafted debris Ice rafted debris, general Composite Core Leg177 Joides Resolution Ocean Drilling Program ODP |
description |
We have carried out a multiphase analysis of samples from ODP Site 177-1092, Meteor Rise, subantarctic South Atlantic. Samples were analyzed for ice-rafted debris (IRD [see Table T1]) and stable isotopes from benthic foraminifera [see Murphy et al., 2002, doi:10.1016/S0031-0182(01)00495-3]. Both analyses were performed on the same samples. Additional work was performed to identify the paleomagnetic stratigraphy. The analyzed samples range in age from about 2.6(?) Ma to 4.6 Ma, a time span that saw considerable global warmth, but witnessed overall global refrigeration and the transition to truly bipolar glaciations.IRD arrived frequently during the Early and early Late Pliocene, but only as 'background rafting' (occasional grains per sample). The first identifiable IRD above background rafting is associated with marine isotope stage (MIS) KM4 (~3.18 Ma). Successive IRD peaks become larger, the same pattern as noted at nearby Site 114-704. A very large peak near the top of the record, approximately 2.8 Ma, is considered to represent a hiatus. Peaks below 51.3 meters composite depth (mcd) coincide with positive excursions of the oxygen isotopic record, and with negative excursions of the carbon isotopic curve, a pattern also noted at Site 114-704. However, the reasonably large IRD peak at 51 mcd (tentatively identified with MIS G11) coincides with a positive excursion on the carbon isotopic curve and negative excursion on the oxygen isotopic curve. This relationship suggests a northern hemisphere interglacial, rising sea level, destabilization of the Antarctic margin, and delivery of Antarctic icebergs to the Southern Ocean. Such a mechanism has recently been suggested by Kanfoush et al. (2000, doi:10.1126/science.288.5472.1815) for latest Pleistocene stadial/interstadial oscillations. Here we suggest that such a mechanism may have been in place on glacial/interglacial time scales as early as the Late Pliocene. : Sediment depth is given in mcd. |
format |
Dataset |
author |
Murphy, L Warnke, Detlef A |
author_facet |
Murphy, L Warnke, Detlef A |
author_sort |
Murphy, L |
title |
(Table T1) Ice rafted debris characteristics of ODP Site 177-1092, supplement to: Murphy, L; Warnke, Detlef A (2002): Data Report: Ice-rafted debris of the Pliocene portion of ODP Site 1092. In: Gersonde, R; Hodell, DA; Blum, P (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 177, 1-6 |
title_short |
(Table T1) Ice rafted debris characteristics of ODP Site 177-1092, supplement to: Murphy, L; Warnke, Detlef A (2002): Data Report: Ice-rafted debris of the Pliocene portion of ODP Site 1092. In: Gersonde, R; Hodell, DA; Blum, P (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 177, 1-6 |
title_full |
(Table T1) Ice rafted debris characteristics of ODP Site 177-1092, supplement to: Murphy, L; Warnke, Detlef A (2002): Data Report: Ice-rafted debris of the Pliocene portion of ODP Site 1092. In: Gersonde, R; Hodell, DA; Blum, P (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 177, 1-6 |
title_fullStr |
(Table T1) Ice rafted debris characteristics of ODP Site 177-1092, supplement to: Murphy, L; Warnke, Detlef A (2002): Data Report: Ice-rafted debris of the Pliocene portion of ODP Site 1092. In: Gersonde, R; Hodell, DA; Blum, P (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 177, 1-6 |
title_full_unstemmed |
(Table T1) Ice rafted debris characteristics of ODP Site 177-1092, supplement to: Murphy, L; Warnke, Detlef A (2002): Data Report: Ice-rafted debris of the Pliocene portion of ODP Site 1092. In: Gersonde, R; Hodell, DA; Blum, P (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 177, 1-6 |
title_sort |
(table t1) ice rafted debris characteristics of odp site 177-1092, supplement to: murphy, l; warnke, detlef a (2002): data report: ice-rafted debris of the pliocene portion of odp site 1092. in: gersonde, r; hodell, da; blum, p (eds.) proceedings of the ocean drilling program, scientific results, college station, tx (ocean drilling program), 177, 1-6 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
2002 |
url |
https://dx.doi.org/10.1594/pangaea.787347 https://doi.pangaea.de/10.1594/PANGAEA.787347 |
long_lat |
ENVELOPE(-64.833,-64.833,-84.333,-84.333) |
geographic |
Antarctic Southern Ocean The Antarctic Warnke |
geographic_facet |
Antarctic Southern Ocean The Antarctic Warnke |
genre |
Antarc* Antarctic Iceberg* Southern Ocean |
genre_facet |
Antarc* Antarctic Iceberg* Southern Ocean |
op_relation |
https://dx.doi.org/10.2973/odp.proc.sr.177.111.2001 https://dx.doi.org/10.1016/s0031-0182(01)00495-3 |
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.787347 https://doi.org/10.2973/odp.proc.sr.177.111.2001 https://doi.org/10.1016/s0031-0182(01)00495-3 |
_version_ |
1766255120355426304 |