IODP Expedition 382: Supplementary Tables for "Episodes of early Pleistocene West Antarctic Ice Sheet retreat recorded by Iceberg Alley sediments"

• Main Authors: Bailey, Ian, Hemming, Sidney, Reilly, Brendan, Rollinson, Gavyn, Williams, Trevor, Weber, Michael E., Raymo, Maureen E., Peck, Victoria L., Ronge, Thomas A., Brachfeld, Stefanie, O'Connell, Suzanne, Tauxe, Lisa, Warnock, Jonathan P., Armbrecht, Linda, Cardillo, Fabricio G., Du, Zhiheng, Fauth, Gerson, Garcia, Marga, Glueder, Anna, Guitard, Michele, Gutjahr, Marcus, Hernández-Almeida, Ivan, Hoem, Frida S., Hwang, Ji-Hwan, Iizuka, Mutsumi, Kato, Yuji, Kenlee, Bridget, Martos, Yasmina M., Pérez, Lara F., Seki, Osamu, Tripathi, Shubham, Zheng, Xufeng
• Format: Dataset
• Language: unknown
• Published: 2022
• Subjects: Provenance; Ar-Ar; QEMSCAN; MicroCT; IODP; Scotia Sea; Pirie Basin; Iceberg Alley; Southern Ocean; ice rafted debris; iceberg rafted debris; Antarctic Ice Sheet; West Antarctic Ice Sheet; ice sheet retreat; deglaciation; IODP Expedition 382; Antarctic; Pirie; Antarc*; Ice Sheet; Iceberg*
• Online Access: https://zenodo.org/record/6539604; https://doi.org/10.5281/zenodo.6539604

IODP Expedition 382: Supplementary Tables for "Episodes of early Pleistocene West Antarctic Ice Sheet retreat recorded by Iceberg Alley sediments" Includes SEM QEMSCAN® and 40Ar/39Ar data for International Ocean Discovery Program (IODP) Expedition 382 Site U1538. Also includes a movie of a 3D-volume realization of an iceberg-rafted sedimentary layer from this site based on non-destructive X-ray microtomography imaging. Data Set Captions: Data Set S1. Modal mineralogy data based on QEMSCAN® analyses, which infer minerals from chemistry. The mineral name assignations for each chemistry-based category stated in this table are aided by visual (microscope-based) inspection of the raw sieved samples. Data Set S2. Mineral association data based on QEMSCAN® analyses. Please read data in columns, mineral against mineral (down then across left). These data define what touches what in the sample and is displayed as a percentage. Association refers to adjacency. Two minerals are “associated” if a pixel of one of the minerals occurs adjacent to a pixel of the other mineral. iExplorer software used scans the measured particles horizontally, from left to right, counting the associations that occur in the images (so the more pixels/closer the x-ray spacing the more accurate the data). Each column is independent. That is, it is split into a percentage of what touches what, so it is not expected that any two minerals’ data are reciprocal. The background category primarily reflects the free boundaries of ‘grains’ rather than liberated grains/particles. While it may provide an indicator of liberation, it does not represent liberation since it does not describe ‘particles’ which are made up of mineral grains. Inclusions and composite particles are therefore not described. Please consider the modal mineralogy (Tab. S1) when examining these mineral association data. Data Set S3. Lithotyping data based on QEMSCAN® analyses. Particles have been digitally filtered using a set of lithotype rules (also displayed in this data set). These ...