Terrigenous grain size (sortable silt) and detrital provenance (Hf, Nd, Pb/Pb) data, Eocene-Oligocene, Newfoundland ridges drifts, IODP Sites 342-U1406 and 342-U1411

• Main Authors: Romans, Brian W, Parent, Andrew, Chilton, Kristin, van Peer, Tim E, Bohaty, Steven M, Spray, James, Wilson, Paul A
• Format: Other/Unknown Material
• Language: English
• Published: PANGAEA 2024
• Subjects: circulation; contourites; Eocene-Oligocene Transition; North Atlantic; Paleoceanography; sortable silt; Newfoundland
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.965577; https://doi.org/10.1594/PANGAEA.965577

This dataset consists of terrigenous grain-size data from Integrated Ocean Drilling Program (IODP) Sites 342-U1406 and 342-U1411 and lithogenic isotope (Hf, Nd, Pb/Pb) data from IODP Site 342-U1411. These two sites are in the Newfoundland ridges contourite drift complex and were cored during IODP Expedition 342 (Paleogene Newfoundland Drifts) in summer 2012. The grain-size data consists of 137 samples from Site 342-U1406 and 192 samples from Site 342-U1411 and was measured with a Micromeritics SediGraph 5120 particle size analyzer. The Hf and Nd data consists of 30 samples from Site 342-U1411 and were measured using a ThermoFisher Neptune multi-collector inductively coupled plasma mass spectrometer (MC-ICPMS). The Pb/Pb data consists of 23 samples from Site 342-U1411 were also measured using a ThermoFisher Neptune MC-ICPMS. All data were generated between the years 2014 and 2019. The timespan of the data set is from ~35 Ma to 26 Ma (9 Myr total duration). Sample resolution ranges and is up to one sample per 10-15 kyr during the Eocene-Oligocene Transition (EOT; 33.65-34.44 Ma) and intervals immediately prior (35-34.44 Ma) and immediately after (33.65-32.5 Ma). Sortable silt metrics (abundance and mean) were calculated from the grain-size data and used to reconstruct bottom-current and paleocirculation history. The lower-resolution lithogenic isotope data is used to infer sediment source (provenance) changes across the EOT.