Heavy mineral study of the glacigenic deposits from the East Siberian continental margin collected during the SWERUS-C3 expedition

• Main Author: Alatarvas, Raisa
• Format: Dataset
• Language: English
• Published: PANGAEA 2022
• Subjects: 77DN20140705; Amphibole; grains; Core; De Long Trough; East Siberian margin; DEPTH; sediment/rock; Description; East Siberian Sea; East Siberian Shelf; Elevation of event; Epidote; Event label; Garnet; GC; glacigenic sediments; Gravity corer; Heavy mineral grains; other; heavy minerals; Ilmenite; Iron oxide; Latitude of event; Location of event; Longitude of event; marine geology; Mica; Oden; Oxides grains; Phosphates; Pyroxene; Sample ID; Scanning electron microscope (SEM); Section; Section Bot in meters below surface; Section Top in meters below surface; Southern Lomonosov Ridge; Sulfides; SWERUS-C3; Norway; Tromsø; Barrow; Lomonosov Ridge; Alaska
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.950199; https://doi.org/10.1594/PANGAEA.950199

The heavy mineral signature of glacigenic deposits from the East Siberian continental margin were studied and the data presented are from samples from cores acquired on Leg 2 of the SWERUS-C3 2014 Expedition on IB Oden, which departed 21 August from Barrow, Alaska, and ended 3 October in Tromsø, Norway. Four sediment cores presented were collected using either a piston (PC) or gravity (GC) corer, both rigged with a 1360 kg core head. The unsplit sediment cores logged shipboard on a Multi-Sensor Core Logger (MSCL). A total of 17 samples were analysed. Two samples are from the 0.83 m long core 20-GC1, which was recovered in 115 m water depth from the East Siberian shelf. Two diamict samples are from the 4.06 m long core 23-GC1, which was recovered in water depth of 508 m, and nine samples are from 4.05 m long core 24-GC1 recovered in water depth of 964 m from the De Long Trough. The samples from core 24-GC1 also include surface sediments and other lithologies found between the seafloor and the diamict. Four samples are from core 29-GC1. The 4.66 m long core was recovered in 824 m water depth from the southern Lomonosov Ridge. The heavy mineral grains >63 μm from 17 samples were analysed with Zeiss Ultra Plus Scanning Electron Microscope (SEM) at the Centre for Material Analysis, University of Oulu in 2019. Heavy mineral identification was done by using MinIdent-Win 3.0 computer program. The 18 analysed elements Na, Mg, Al, Si, P, S, K, Ca, Ti, V, Cr, Fe, Cu, Zn, Zr, La, Ce, and Nd (expressed as oxides) were used in the specification of the minerals.