Biogenic opal record of gravity core MSM45_19-2

• Main Authors: Kolling, Henriette Marie, Doering, Kristin, Kienast, Markus, Kienast, Stephanie S, Schneider, Ralph R
• Format: Dataset
• Language: English
• Published: PANGAEA 2022
• Subjects: 8.2 ka event; Accumulation rate; biogenic silica per year; Accumulation rate per year; After Mortlock and Froelich (1981); biogenic opal; DEPTH; sediment/rock; GC; Gravity corer; Holocene; Labrador Sea; Labrador Shelf; Maria S. Merian; MSM45; MSM45_418-2; MSM45-19-2; Opal; biogenic silica; primary production
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.949244; https://doi.org/10.1594/PANGAEA.949244

Biogenic opal (BSi) concentrations were analysed as indicator for past primary productivity on gravity core MSM45_19-2 from the northern Labrador Shelf. Gravity core MSM45_19-2 was obtained during R/V Maria S. Merian expedition MSM45 (58°45.68'N, 61°56.25'W, water depth: 202 m) in 2015 (Schneider et al., 2016). Biogenic opal was determined at Dalhousie University following the method of (Mortlock and Froelich , 1989). Briefly, amorphous silica was extracted from ca. 20 mg subsamples using a 2 M Na2 CO3 solution at 85°C for 5 h, followed by the measurement of dissolved silica concentrations by molybdenum blue spectrophotometry.