Grain size determination of IODP Site 374-U1523

• Main Author: Gales, Jenny A
• Format: Dataset
• Language: English
• Published: PANGAEA 2023
• Subjects: 374-U1523A; 374-U1523B; 374-U1523E; Antarctica; Clay; Date/Time of event; Date/Time of event 2; DEPTH; sediment/rock; Drilling/coring; DSDP/ODP/IODP sample designation; Elevation of event; Event label; Exp374; grainsize; Grain size; Mastersizer 2000; Malvern Instrument Inc.; Gravel; IODP; IODP Depth Scale Terminology; IODP Exp. 374; Joides Resolution; Latitude of event; Longitude of event; Mud; Sample code/label; Sand; Silt; U1523; Volume moment mean diameter; Iselin Bank; Ross Sea; Antarc*
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.960626; https://doi.org/10.1594/PANGAEA.960626

Cores U1523A, U1523B and U1523E were taken from the Iselin Bank, eastern Ross Sea, Antarctica (74°9.02′S, 176°47.70′W) in 828 m water depth during International Ocean Discovery Program Expedition 374. Grain size analysis of the <1 mm fraction was measured every 15 cm at the University of Plymouth using a Malvern Mastersizer 2000 laser particle size-analyser. Subsamples (5 mm³) were dry sieved, 10% H2O2 solution added and samples were left overnight in a water bath at 60°C. 10% solution of sodium hexametaphosphate was added and ultrasound applied before measurements were made. The coarse fraction (>1 mm) was measured by dry sieving 1 cm³ subsamples using a nested stack at half-phi intervals (1.4 mm - 16 mm). Grain-size data is presented as the sand%, silt%, clay% and gravel%, sand%, mud% fractions according to the following grain-size intervals: very fine-coarse sand (1 mm - 62.5 μm), silt (62.5 - 4 μm) and clay (<4 μm). The volume mean grain-size diameter is also presented (D4,3).