Occurrence of microtextures recorded from quartz sand grains of ODP Hole 178-1101A (Table 1)
Sediment drifts on the continental rise are located proximal to the western side of the Antarctic Peninsula and recorded changes in glacial volume and thermal regime over the last ca. 15 m.y. At Ocean Drilling Program (ODP) Site 1101 (Leg 178), which recovered sediments back to 3.1 Ma, glacial-inter...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.706581 2024-09-15T17:44:22+00:00 Occurrence of microtextures recorded from quartz sand grains of ODP Hole 178-1101A (Table 1) Cowan, Ellen A Hillenbrand, Claus-Dieter Hassler, Lauren E Ake, Matthew T LATITUDE: -64.372200 * LONGITUDE: -70.261180 * DATE/TIME START: 1998-03-18T10:30:00 * DATE/TIME END: 1998-03-18T10:30:00 * MINIMUM DEPTH, sediment/rock: 2.00 m * MAXIMUM DEPTH, sediment/rock: 213.38 m 2008 text/tab-separated-values, 525 data points https://doi.pangaea.de/10.1594/PANGAEA.706581 https://doi.org/10.1594/PANGAEA.706581 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.706581 https://doi.org/10.1594/PANGAEA.706581 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Cowan, Ellen A; Hillenbrand, Claus-Dieter; Hassler, Lauren E; Ake, Matthew T (2008): Coarse-grained terrigenous sediment deposition on continental rise drifts: A record of Plio-Pleistocene glaciation on the Antarctic Peninsula. Palaeogeography, Palaeoclimatology, Palaeoecology, 265(3-4), 275-291, https://doi.org/10.1016/j.palaeo.2008.03.010 178-1101A AGE Comment Counting 250-2000 µm fraction DEPTH sediment/rock DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Joides Resolution Leg178 Ocean Drilling Program ODP Quartz surface texture Roundness Sample code/label Scanning electron microscope (SEM) South Pacific Ocean dataset 2008 ftpangaea https://doi.org/10.1594/PANGAEA.70658110.1016/j.palaeo.2008.03.010 2024-07-24T02:31:30Z Sediment drifts on the continental rise are located proximal to the western side of the Antarctic Peninsula and recorded changes in glacial volume and thermal regime over the last ca. 15 m.y. At Ocean Drilling Program (ODP) Site 1101 (Leg 178), which recovered sediments back to 3.1 Ma, glacial-interglacial cyclicity was identified based on the biogenic component and sedimentary structures observed in X-radiographs, magnetic susceptibility and lithofacies descriptions. Glacial intervals are dominated by fine-grained laminated mud and interglacial units consist of bioturbated muds enriched in biogenic components. From 2.2 to 0.76 Ma, planktonic foraminifera and calcareous nannofossils dominate in the interglacials suggesting a shift of the Antarctic Polar Front (APF) to the south near the drifts. Prior to 2.2 Ma, cyclicity cannot be identified and diatoms dominate the biogenic component and high percent opal suggests warmer conditions south of the APF and reduced sea ice over the drifts. Analyses of the coarse-grained terrigenous fraction (pebbles and coarse sand) from Sites 1096 and 1101 record glaciers at sea-level releasing iceberg-rafted debris (IRD) throughout the last 3.1 m.y. Analyses of quartz sand grains in IRD with the scanning electron microscope (SEM) show an abrupt change in the frequency of occurrence of microtextures at ~1.35 Ma. During the Late Pliocene to Early Pleistocene, the population of quartz grains included completely weathered grains and a low frequency of crushing and abrasion, suggesting that glaciers were small and did not inundate the topography. Debris shed from mountain peaks was transported supraglacially or englacially allowing weathered grains to pass through the glacier unmodified. During glacial periods from 1.35-0.76 Ma, glaciers expanded in size. The IRD flux was very high and dropstones have diverse lithologies. Conditions resembling those at the Last Glacial Maximum (LGM) have been episodically present on the Antarctic Peninsula since ~0.76 Ma. Quartz sand grains show high ... Dataset Antarc* Antarctic Antarctic Peninsula Iceberg* Planktonic foraminifera Sea ice PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-70.261180,-70.261180,-64.372200,-64.372200) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
178-1101A AGE Comment Counting 250-2000 µm fraction DEPTH sediment/rock DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Joides Resolution Leg178 Ocean Drilling Program ODP Quartz surface texture Roundness Sample code/label Scanning electron microscope (SEM) South Pacific Ocean |
spellingShingle |
178-1101A AGE Comment Counting 250-2000 µm fraction DEPTH sediment/rock DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Joides Resolution Leg178 Ocean Drilling Program ODP Quartz surface texture Roundness Sample code/label Scanning electron microscope (SEM) South Pacific Ocean Cowan, Ellen A Hillenbrand, Claus-Dieter Hassler, Lauren E Ake, Matthew T Occurrence of microtextures recorded from quartz sand grains of ODP Hole 178-1101A (Table 1) |
topic_facet |
178-1101A AGE Comment Counting 250-2000 µm fraction DEPTH sediment/rock DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Joides Resolution Leg178 Ocean Drilling Program ODP Quartz surface texture Roundness Sample code/label Scanning electron microscope (SEM) South Pacific Ocean |
description |
Sediment drifts on the continental rise are located proximal to the western side of the Antarctic Peninsula and recorded changes in glacial volume and thermal regime over the last ca. 15 m.y. At Ocean Drilling Program (ODP) Site 1101 (Leg 178), which recovered sediments back to 3.1 Ma, glacial-interglacial cyclicity was identified based on the biogenic component and sedimentary structures observed in X-radiographs, magnetic susceptibility and lithofacies descriptions. Glacial intervals are dominated by fine-grained laminated mud and interglacial units consist of bioturbated muds enriched in biogenic components. From 2.2 to 0.76 Ma, planktonic foraminifera and calcareous nannofossils dominate in the interglacials suggesting a shift of the Antarctic Polar Front (APF) to the south near the drifts. Prior to 2.2 Ma, cyclicity cannot be identified and diatoms dominate the biogenic component and high percent opal suggests warmer conditions south of the APF and reduced sea ice over the drifts. Analyses of the coarse-grained terrigenous fraction (pebbles and coarse sand) from Sites 1096 and 1101 record glaciers at sea-level releasing iceberg-rafted debris (IRD) throughout the last 3.1 m.y. Analyses of quartz sand grains in IRD with the scanning electron microscope (SEM) show an abrupt change in the frequency of occurrence of microtextures at ~1.35 Ma. During the Late Pliocene to Early Pleistocene, the population of quartz grains included completely weathered grains and a low frequency of crushing and abrasion, suggesting that glaciers were small and did not inundate the topography. Debris shed from mountain peaks was transported supraglacially or englacially allowing weathered grains to pass through the glacier unmodified. During glacial periods from 1.35-0.76 Ma, glaciers expanded in size. The IRD flux was very high and dropstones have diverse lithologies. Conditions resembling those at the Last Glacial Maximum (LGM) have been episodically present on the Antarctic Peninsula since ~0.76 Ma. Quartz sand grains show high ... |
format |
Dataset |
author |
Cowan, Ellen A Hillenbrand, Claus-Dieter Hassler, Lauren E Ake, Matthew T |
author_facet |
Cowan, Ellen A Hillenbrand, Claus-Dieter Hassler, Lauren E Ake, Matthew T |
author_sort |
Cowan, Ellen A |
title |
Occurrence of microtextures recorded from quartz sand grains of ODP Hole 178-1101A (Table 1) |
title_short |
Occurrence of microtextures recorded from quartz sand grains of ODP Hole 178-1101A (Table 1) |
title_full |
Occurrence of microtextures recorded from quartz sand grains of ODP Hole 178-1101A (Table 1) |
title_fullStr |
Occurrence of microtextures recorded from quartz sand grains of ODP Hole 178-1101A (Table 1) |
title_full_unstemmed |
Occurrence of microtextures recorded from quartz sand grains of ODP Hole 178-1101A (Table 1) |
title_sort |
occurrence of microtextures recorded from quartz sand grains of odp hole 178-1101a (table 1) |
publisher |
PANGAEA |
publishDate |
2008 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.706581 https://doi.org/10.1594/PANGAEA.706581 |
op_coverage |
LATITUDE: -64.372200 * LONGITUDE: -70.261180 * DATE/TIME START: 1998-03-18T10:30:00 * DATE/TIME END: 1998-03-18T10:30:00 * MINIMUM DEPTH, sediment/rock: 2.00 m * MAXIMUM DEPTH, sediment/rock: 213.38 m |
long_lat |
ENVELOPE(-70.261180,-70.261180,-64.372200,-64.372200) |
genre |
Antarc* Antarctic Antarctic Peninsula Iceberg* Planktonic foraminifera Sea ice |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Iceberg* Planktonic foraminifera Sea ice |
op_source |
Supplement to: Cowan, Ellen A; Hillenbrand, Claus-Dieter; Hassler, Lauren E; Ake, Matthew T (2008): Coarse-grained terrigenous sediment deposition on continental rise drifts: A record of Plio-Pleistocene glaciation on the Antarctic Peninsula. Palaeogeography, Palaeoclimatology, Palaeoecology, 265(3-4), 275-291, https://doi.org/10.1016/j.palaeo.2008.03.010 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.706581 https://doi.org/10.1594/PANGAEA.706581 |
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.70658110.1016/j.palaeo.2008.03.010 |
_version_ |
1810491847913504768 |