Lithology and measurement of largest grains in ODP Hole 152-918D (Table 1), 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
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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1997
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ftdatacite:10.1594/pangaea.704899 2023-05-15T16:26:46+02:00 Lithology and measurement of largest grains in ODP Hole 152-918D (Table 1), 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 Helland, P E Holmes, Mary Anne 1997 text/tab-separated-values https://dx.doi.org/10.1594/pangaea.704899 https://doi.pangaea.de/10.1594/PANGAEA.704899 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.1016/s0031-0182(97)00025-4 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY DEPTH, sediment/rock Sample code/label Lithology/composition/facies Size Drilling/drill rig DSDP/ODP/IODP sample designation Scanning electron microscope SEM Leg152 Joides Resolution Ocean Drilling Program ODP Supplementary Dataset dataset Dataset 1997 ftdatacite https://doi.org/10.1594/pangaea.704899 https://doi.org/10.1016/s0031-0182(97)00025-4 2022-02-08T16:24:46Z 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 North Atlantic DataCite Metadata Store (German National Library of Science and Technology) Greenland Helland ENVELOPE(6.470,6.470,62.608,62.608) Irminger Basin ENVELOPE(-36.000,-36.000,61.000,61.000) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
DEPTH, sediment/rock Sample code/label Lithology/composition/facies Size Drilling/drill rig DSDP/ODP/IODP sample designation Scanning electron microscope SEM Leg152 Joides Resolution Ocean Drilling Program ODP |
spellingShingle |
DEPTH, sediment/rock Sample code/label Lithology/composition/facies Size Drilling/drill rig DSDP/ODP/IODP sample designation Scanning electron microscope SEM Leg152 Joides Resolution Ocean Drilling Program ODP Helland, P E Holmes, Mary Anne Lithology and measurement of largest grains in ODP Hole 152-918D (Table 1), 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 |
topic_facet |
DEPTH, sediment/rock Sample code/label Lithology/composition/facies Size Drilling/drill rig DSDP/ODP/IODP sample designation Scanning electron microscope SEM Leg152 Joides Resolution Ocean Drilling Program ODP |
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), 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 |
title_short |
Lithology and measurement of largest grains in ODP Hole 152-918D (Table 1), 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 |
title_full |
Lithology and measurement of largest grains in ODP Hole 152-918D (Table 1), 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 |
title_fullStr |
Lithology and measurement of largest grains in ODP Hole 152-918D (Table 1), 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 |
title_full_unstemmed |
Lithology and measurement of largest grains in ODP Hole 152-918D (Table 1), 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 |
title_sort |
lithology and measurement of largest grains in odp hole 152-918d (table 1), 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 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
1997 |
url |
https://dx.doi.org/10.1594/pangaea.704899 https://doi.pangaea.de/10.1594/PANGAEA.704899 |
long_lat |
ENVELOPE(6.470,6.470,62.608,62.608) ENVELOPE(-36.000,-36.000,61.000,61.000) |
geographic |
Greenland Helland Irminger Basin |
geographic_facet |
Greenland Helland Irminger Basin |
genre |
Greenland North Atlantic |
genre_facet |
Greenland North Atlantic |
op_relation |
https://dx.doi.org/10.1016/s0031-0182(97)00025-4 |
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.704899 https://doi.org/10.1016/s0031-0182(97)00025-4 |
_version_ |
1766015750506545152 |