Neogene ice-rafted debris record of ODP Hole 120-751A
One of the primary objectives of Leg 120 was to obtain a high-resolution Neogene stratigraphic section from the Kerguelen Plateau. Site 751, located in the central part of the Raggatt Basin on the Southern Kerguelen Plateau in 1633.8 m of water (57°43.56'S; 79°48.89'E), was selected as the...
Main Author: | |
---|---|
Format: | Other/Unknown Material |
Language: | English |
Published: |
PANGAEA
1992
|
Subjects: | |
Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.757576 https://doi.org/10.1594/PANGAEA.757576 |
id |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.757576 |
---|---|
record_format |
openpolar |
spelling |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.757576 2024-09-15T17:41:47+00:00 Neogene ice-rafted debris record of ODP Hole 120-751A Breza, James R LATITUDE: -57.726000 * LONGITUDE: 79.814800 * DATE/TIME START: 1988-04-18T20:00:00 * DATE/TIME END: 1988-04-19T23:30:00 1992 application/zip, 7 datasets https://doi.pangaea.de/10.1594/PANGAEA.757576 https://doi.org/10.1594/PANGAEA.757576 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.757576 https://doi.org/10.1594/PANGAEA.757576 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Breza, James R (1992): High-resolution study of Neogene ice-rafted debris, Site 751, southern Kerguelen Plateau. In: Wise, SW; Schlich, R; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 120, 207-221, https://doi.org/10.2973/odp.proc.sr.120.136.1992 120-751A DRILL Drilling/drill rig Joides Resolution Leg120 Ocean Drilling Program ODP South Indian Ridge South Indian Ocean dataset publication series 1992 ftpangaea https://doi.org/10.1594/PANGAEA.75757610.2973/odp.proc.sr.120.136.1992 2024-07-24T02:31:20Z One of the primary objectives of Leg 120 was to obtain a high-resolution Neogene stratigraphic section from the Kerguelen Plateau. Site 751, located in the central part of the Raggatt Basin on the Southern Kerguelen Plateau in 1633.8 m of water (57°43.56'S; 79°48.89'E), was selected as the dedicated Neogene site for this objective. High-resolution sampling at Site 751 was used to delineate in detail the Neogene ice-rafted debris (IRD) occurrences on the Kerguelen Plateau. The oldest IRD found at Site 751 was approximately 9.9 Ma, and it was not until approximately 8.5 Ma that significant concentrations of IRD were detected. The first major IRD event at this site occurred in the uppermost Miocene between 6.0 and 5.5 Ma. During this time period, a general climatic cooling and glacial expansion occurred on Antarctica. The late Miocene IRD event was followed by a continuous episode of elevated IRD deposition in the lowermost Pliocene between 4.5 and 4.1 Ma. The 0.4-m.y. duration and the timing of the early Pliocene IRD event on the Kerguelen Plateau corresponds with IRD fluxes observed on the Falkland Plateau and in the Weddell Abyssal Plain. This correspondence of data indicates that a major global climatic event occurred during the early Pliocene. The East Antarctic Ice Sheet may have experienced deglaciation between 4.5 and 4.1 Ma and, as a result, released large volumes of sediment-laden ice into the Southern Ocean. Other/Unknown Material Antarc* Antarctic Antarctica Ice Sheet Southern Ocean PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(79.814800,79.814800,-57.726000,-57.726000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
120-751A DRILL Drilling/drill rig Joides Resolution Leg120 Ocean Drilling Program ODP South Indian Ridge South Indian Ocean |
spellingShingle |
120-751A DRILL Drilling/drill rig Joides Resolution Leg120 Ocean Drilling Program ODP South Indian Ridge South Indian Ocean Breza, James R Neogene ice-rafted debris record of ODP Hole 120-751A |
topic_facet |
120-751A DRILL Drilling/drill rig Joides Resolution Leg120 Ocean Drilling Program ODP South Indian Ridge South Indian Ocean |
description |
One of the primary objectives of Leg 120 was to obtain a high-resolution Neogene stratigraphic section from the Kerguelen Plateau. Site 751, located in the central part of the Raggatt Basin on the Southern Kerguelen Plateau in 1633.8 m of water (57°43.56'S; 79°48.89'E), was selected as the dedicated Neogene site for this objective. High-resolution sampling at Site 751 was used to delineate in detail the Neogene ice-rafted debris (IRD) occurrences on the Kerguelen Plateau. The oldest IRD found at Site 751 was approximately 9.9 Ma, and it was not until approximately 8.5 Ma that significant concentrations of IRD were detected. The first major IRD event at this site occurred in the uppermost Miocene between 6.0 and 5.5 Ma. During this time period, a general climatic cooling and glacial expansion occurred on Antarctica. The late Miocene IRD event was followed by a continuous episode of elevated IRD deposition in the lowermost Pliocene between 4.5 and 4.1 Ma. The 0.4-m.y. duration and the timing of the early Pliocene IRD event on the Kerguelen Plateau corresponds with IRD fluxes observed on the Falkland Plateau and in the Weddell Abyssal Plain. This correspondence of data indicates that a major global climatic event occurred during the early Pliocene. The East Antarctic Ice Sheet may have experienced deglaciation between 4.5 and 4.1 Ma and, as a result, released large volumes of sediment-laden ice into the Southern Ocean. |
format |
Other/Unknown Material |
author |
Breza, James R |
author_facet |
Breza, James R |
author_sort |
Breza, James R |
title |
Neogene ice-rafted debris record of ODP Hole 120-751A |
title_short |
Neogene ice-rafted debris record of ODP Hole 120-751A |
title_full |
Neogene ice-rafted debris record of ODP Hole 120-751A |
title_fullStr |
Neogene ice-rafted debris record of ODP Hole 120-751A |
title_full_unstemmed |
Neogene ice-rafted debris record of ODP Hole 120-751A |
title_sort |
neogene ice-rafted debris record of odp hole 120-751a |
publisher |
PANGAEA |
publishDate |
1992 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.757576 https://doi.org/10.1594/PANGAEA.757576 |
op_coverage |
LATITUDE: -57.726000 * LONGITUDE: 79.814800 * DATE/TIME START: 1988-04-18T20:00:00 * DATE/TIME END: 1988-04-19T23:30:00 |
long_lat |
ENVELOPE(79.814800,79.814800,-57.726000,-57.726000) |
genre |
Antarc* Antarctic Antarctica Ice Sheet Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica Ice Sheet Southern Ocean |
op_source |
Supplement to: Breza, James R (1992): High-resolution study of Neogene ice-rafted debris, Site 751, southern Kerguelen Plateau. In: Wise, SW; Schlich, R; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 120, 207-221, https://doi.org/10.2973/odp.proc.sr.120.136.1992 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.757576 https://doi.org/10.1594/PANGAEA.757576 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.75757610.2973/odp.proc.sr.120.136.1992 |
_version_ |
1810488028045508608 |