Changing sediment supply during glacial-interglacial intervals in the North Atlantic revealed by particle size characterization and environmental magnetism
The Pliocene-Pleistocene transition is characterized by an abundance of Ice-Rafted Debris (IRD) in the North Atlantic basin. One of the regions affected by IRD during this period is the Gardar Drift, where the DSDP Leg 94 Hole 611A is located. This region received sediments from different sources du...
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ftunivutrecht:oai:dspace.library.uu.nl:1874/428808 2023-11-12T04:17:54+01:00 Changing sediment supply during glacial-interglacial intervals in the North Atlantic revealed by particle size characterization and environmental magnetism Leone, Stephanie Palcu, Dan V. Srivastava, Priyeshu Hassan, Muhammad Bin Muraszko, Joy R. Jovane, Luigi Paleomagnetism 2023-01 application/pdf https://dspace.library.uu.nl/handle/1874/428808 en eng 0921-8181 https://dspace.library.uu.nl/handle/1874/428808 info:eu-repo/semantics/OpenAccess DSDP Leg 94 Hole 611A Early Pleistocene Glacial-interglacial intervals IRD Paleoclimate Sediment provenance Oceanography Global and Planetary Change Article 2023 ftunivutrecht 2023-11-01T23:30:31Z The Pliocene-Pleistocene transition is characterized by an abundance of Ice-Rafted Debris (IRD) in the North Atlantic basin. One of the regions affected by IRD during this period is the Gardar Drift, where the DSDP Leg 94 Hole 611A is located. This region received sediments from different sources during the glacial and interglacial intervals (e.g., Iceland and Greenland). We analyzed grain size and particle-size specific magnetic properties of sediments for their provenance characterization between ∼2.64 and 2.52 Ma. Our results show that major proportion of bulk sediments during both glacial and interglacial periods were made up of basaltic-rich Icelandic sediments, whereas only during intense glacial periods (Marine Isotope Stages 100 and 104), a small proportion of non-basaltic sand compositions were identified, possibly sourced from Greenland and other non-basaltic provenance. The non-basaltic sand fractions during the intense glacial periods were likely supplied as IRDs. In addition, a new level of coarse lithics (38 pcs. of >1 mm) composed of different rocks types (e.g., basalt, granite, granodiorite etc.) were identified in DSDP 611A Hole during the end of MIS 104 glacial period. The coarse lithic fragments showed distinctive magnetic properties than rest of the particle sizes and were classified as Iceberg-Rafted Debris (IBRD). Overall, our results show that higher sand percentage was found during the intense glacial episodes, and their magnetic grain size analysis could help in distinguishing their provenance. We elaborate that particle size specific magnetic measurements of sand fractions could help in rapidly characterizing the glacial episodes in the subpolar North Atlantic. Article in Journal/Newspaper Greenland Iceland North Atlantic Utrecht University Repository Greenland |
institution |
Open Polar |
collection |
Utrecht University Repository |
op_collection_id |
ftunivutrecht |
language |
English |
topic |
DSDP Leg 94 Hole 611A Early Pleistocene Glacial-interglacial intervals IRD Paleoclimate Sediment provenance Oceanography Global and Planetary Change |
spellingShingle |
DSDP Leg 94 Hole 611A Early Pleistocene Glacial-interglacial intervals IRD Paleoclimate Sediment provenance Oceanography Global and Planetary Change Leone, Stephanie Palcu, Dan V. Srivastava, Priyeshu Hassan, Muhammad Bin Muraszko, Joy R. Jovane, Luigi Changing sediment supply during glacial-interglacial intervals in the North Atlantic revealed by particle size characterization and environmental magnetism |
topic_facet |
DSDP Leg 94 Hole 611A Early Pleistocene Glacial-interglacial intervals IRD Paleoclimate Sediment provenance Oceanography Global and Planetary Change |
description |
The Pliocene-Pleistocene transition is characterized by an abundance of Ice-Rafted Debris (IRD) in the North Atlantic basin. One of the regions affected by IRD during this period is the Gardar Drift, where the DSDP Leg 94 Hole 611A is located. This region received sediments from different sources during the glacial and interglacial intervals (e.g., Iceland and Greenland). We analyzed grain size and particle-size specific magnetic properties of sediments for their provenance characterization between ∼2.64 and 2.52 Ma. Our results show that major proportion of bulk sediments during both glacial and interglacial periods were made up of basaltic-rich Icelandic sediments, whereas only during intense glacial periods (Marine Isotope Stages 100 and 104), a small proportion of non-basaltic sand compositions were identified, possibly sourced from Greenland and other non-basaltic provenance. The non-basaltic sand fractions during the intense glacial periods were likely supplied as IRDs. In addition, a new level of coarse lithics (38 pcs. of >1 mm) composed of different rocks types (e.g., basalt, granite, granodiorite etc.) were identified in DSDP 611A Hole during the end of MIS 104 glacial period. The coarse lithic fragments showed distinctive magnetic properties than rest of the particle sizes and were classified as Iceberg-Rafted Debris (IBRD). Overall, our results show that higher sand percentage was found during the intense glacial episodes, and their magnetic grain size analysis could help in distinguishing their provenance. We elaborate that particle size specific magnetic measurements of sand fractions could help in rapidly characterizing the glacial episodes in the subpolar North Atlantic. |
author2 |
Paleomagnetism |
format |
Article in Journal/Newspaper |
author |
Leone, Stephanie Palcu, Dan V. Srivastava, Priyeshu Hassan, Muhammad Bin Muraszko, Joy R. Jovane, Luigi |
author_facet |
Leone, Stephanie Palcu, Dan V. Srivastava, Priyeshu Hassan, Muhammad Bin Muraszko, Joy R. Jovane, Luigi |
author_sort |
Leone, Stephanie |
title |
Changing sediment supply during glacial-interglacial intervals in the North Atlantic revealed by particle size characterization and environmental magnetism |
title_short |
Changing sediment supply during glacial-interglacial intervals in the North Atlantic revealed by particle size characterization and environmental magnetism |
title_full |
Changing sediment supply during glacial-interglacial intervals in the North Atlantic revealed by particle size characterization and environmental magnetism |
title_fullStr |
Changing sediment supply during glacial-interglacial intervals in the North Atlantic revealed by particle size characterization and environmental magnetism |
title_full_unstemmed |
Changing sediment supply during glacial-interglacial intervals in the North Atlantic revealed by particle size characterization and environmental magnetism |
title_sort |
changing sediment supply during glacial-interglacial intervals in the north atlantic revealed by particle size characterization and environmental magnetism |
publishDate |
2023 |
url |
https://dspace.library.uu.nl/handle/1874/428808 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Iceland North Atlantic |
genre_facet |
Greenland Iceland North Atlantic |
op_relation |
0921-8181 https://dspace.library.uu.nl/handle/1874/428808 |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782334654572920832 |