Lithology and measurement of largest grains in ODP Hole 152-918D (Table 1)
Shipboard analysis of the 1183-m sedimentary section recovered at Site 918 in the Irminger Basin during Ocean Drilling Program Leg 152 revealed material of glacial origin (diamictons, ice-rafted debris (IRD) and dropstones) as deep as 543 m below sea floor (bsf). The sediment containing the deepest...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.704899 2023-05-15T16:27:21+02:00 Lithology and measurement of largest grains in ODP Hole 152-918D (Table 1) Helland, P E Holmes, Mary Anne LATITUDE: 63.092900 * LONGITUDE: -38.638900 * DATE/TIME START: 1993-10-28T21:30:00 * DATE/TIME END: 1993-11-12T16:50:00 * MINIMUM DEPTH, sediment/rock: 536 m * MAXIMUM DEPTH, sediment/rock: 870 m 1997-10-01 text/tab-separated-values, 33 data points https://doi.pangaea.de/10.1594/PANGAEA.704899 https://doi.org/10.1594/PANGAEA.704899 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.704899 https://doi.org/10.1594/PANGAEA.704899 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Helland, P E; Holmes, Mary Anne (1997): Surface textural analysis of quartz sand grains from ODP Site 918 off the southeast coast of Greenland suggests glaciation of southern Greenland at 11 Ma. Palaeogeography, Palaeoclimatology, Palaeoecology, 135(1-4), 109-121, https://doi.org/10.1016/S0031-0182(97)00025-4 152-918D DEPTH sediment/rock DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Greenland Sea Joides Resolution Leg152 Lithology/composition/facies Ocean Drilling Program ODP Sample code/label Scanning electron microscope (SEM) Size Dataset 1997 ftpangaea https://doi.org/10.1594/PANGAEA.704899 https://doi.org/10.1016/S0031-0182(97)00025-4 2023-01-20T08:46:44Z Shipboard analysis of the 1183-m sedimentary section recovered at Site 918 in the Irminger Basin during Ocean Drilling Program Leg 152 revealed material of glacial origin (diamictons, ice-rafted debris (IRD) and dropstones) as deep as 543 m below sea floor (bsf). The sediment containing the deepest dropstone was biostratigraphically dated shipboard as approximately 7 Ma, pushing back the date for the onset of glaciation on southern Greenland by 5 Ma. Thin layers of fine sand were found as much as 60 m deeper in the core, raising the possibility of an even earlier date for glaciation. To determine the sedimentary history of these deeper sand layers, the surface textures on quartz grains from eleven cores bracketing the interval of interest were analyzed by scanning electron microscope. The results suggest that the grains in the 60-m interval below the deepest dropstone have a glacial history. At that level, an 11 -Ma Sr-isotope date was obtained from planktonic foraminifers. This late Miocene timing is supported biostratigraphically by both nannofossil and foraminifer assemblages, indicating a new minimum age for the onset of glaciation on southern Greenland and in the North Atlantic. Dataset Greenland Greenland Sea North Atlantic PANGAEA - Data Publisher for Earth & Environmental Science Greenland Irminger Basin ENVELOPE(-36.000,-36.000,61.000,61.000) ENVELOPE(-38.638900,-38.638900,63.092900,63.092900) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
152-918D DEPTH sediment/rock DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Greenland Sea Joides Resolution Leg152 Lithology/composition/facies Ocean Drilling Program ODP Sample code/label Scanning electron microscope (SEM) Size |
spellingShingle |
152-918D DEPTH sediment/rock DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Greenland Sea Joides Resolution Leg152 Lithology/composition/facies Ocean Drilling Program ODP Sample code/label Scanning electron microscope (SEM) Size Helland, P E Holmes, Mary Anne Lithology and measurement of largest grains in ODP Hole 152-918D (Table 1) |
topic_facet |
152-918D DEPTH sediment/rock DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Greenland Sea Joides Resolution Leg152 Lithology/composition/facies Ocean Drilling Program ODP Sample code/label Scanning electron microscope (SEM) Size |
description |
Shipboard analysis of the 1183-m sedimentary section recovered at Site 918 in the Irminger Basin during Ocean Drilling Program Leg 152 revealed material of glacial origin (diamictons, ice-rafted debris (IRD) and dropstones) as deep as 543 m below sea floor (bsf). The sediment containing the deepest dropstone was biostratigraphically dated shipboard as approximately 7 Ma, pushing back the date for the onset of glaciation on southern Greenland by 5 Ma. Thin layers of fine sand were found as much as 60 m deeper in the core, raising the possibility of an even earlier date for glaciation. To determine the sedimentary history of these deeper sand layers, the surface textures on quartz grains from eleven cores bracketing the interval of interest were analyzed by scanning electron microscope. The results suggest that the grains in the 60-m interval below the deepest dropstone have a glacial history. At that level, an 11 -Ma Sr-isotope date was obtained from planktonic foraminifers. This late Miocene timing is supported biostratigraphically by both nannofossil and foraminifer assemblages, indicating a new minimum age for the onset of glaciation on southern Greenland and in the North Atlantic. |
format |
Dataset |
author |
Helland, P E Holmes, Mary Anne |
author_facet |
Helland, P E Holmes, Mary Anne |
author_sort |
Helland, P E |
title |
Lithology and measurement of largest grains in ODP Hole 152-918D (Table 1) |
title_short |
Lithology and measurement of largest grains in ODP Hole 152-918D (Table 1) |
title_full |
Lithology and measurement of largest grains in ODP Hole 152-918D (Table 1) |
title_fullStr |
Lithology and measurement of largest grains in ODP Hole 152-918D (Table 1) |
title_full_unstemmed |
Lithology and measurement of largest grains in ODP Hole 152-918D (Table 1) |
title_sort |
lithology and measurement of largest grains in odp hole 152-918d (table 1) |
publisher |
PANGAEA |
publishDate |
1997 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.704899 https://doi.org/10.1594/PANGAEA.704899 |
op_coverage |
LATITUDE: 63.092900 * LONGITUDE: -38.638900 * DATE/TIME START: 1993-10-28T21:30:00 * DATE/TIME END: 1993-11-12T16:50:00 * MINIMUM DEPTH, sediment/rock: 536 m * MAXIMUM DEPTH, sediment/rock: 870 m |
long_lat |
ENVELOPE(-36.000,-36.000,61.000,61.000) ENVELOPE(-38.638900,-38.638900,63.092900,63.092900) |
geographic |
Greenland Irminger Basin |
geographic_facet |
Greenland Irminger Basin |
genre |
Greenland Greenland Sea North Atlantic |
genre_facet |
Greenland Greenland Sea North Atlantic |
op_source |
Supplement to: Helland, P E; Holmes, Mary Anne (1997): Surface textural analysis of quartz sand grains from ODP Site 918 off the southeast coast of Greenland suggests glaciation of southern Greenland at 11 Ma. Palaeogeography, Palaeoclimatology, Palaeoecology, 135(1-4), 109-121, https://doi.org/10.1016/S0031-0182(97)00025-4 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.704899 https://doi.org/10.1594/PANGAEA.704899 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.704899 https://doi.org/10.1016/S0031-0182(97)00025-4 |
_version_ |
1766016501533376512 |