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Dated ages and sedimentation rates of sediment core BOFS10K

Authors
Publisher
PANGAEA
Publication Date
Identifiers
DOI: 10.1594/pangaea.199844
Keywords
  • Accumulation Rate
  • Sediment
  • Mean
  • Age
  • Comment
  • Age
  • Dated
  • Biogeochemical Ocean Flux Study
  • Bofs
  • Bofs10K
  • Bofs11890#2
  • D184
  • Density
  • Dry Bulk
  • Discovery (1962)
  • Jgofs
  • Joint Global Ocean Flux Study
  • Kasten Corer
  • Northeast Atlantic
  • Sedimentation Rate
  • Susceptibility
  • Water Content Of Wet Mass
Disciplines
  • Chemistry

Abstract

Kasten Core Data Set Introduction This document covers the data obtained from a series of Kasten cores collected during Discovery 184. The data are held in a number of files. File KASISO contains oxygen and carbon isotope data obtained from foramanifera tests. File KASGEN contains dating, correlation, sedimentation rate, density, water content and magnetic susceptibility data. File KASCHEM contains carbon and nitrogen chemistry data. File KASSED contains a range of sediment grain size parameters. Files KBFHEAD and KBFDAT contain species counts of benthic foraminifera. Sampling The Kasten Corer used was built to the specifications of Kuehl et al (1985). The barrel (3m long and 15 cm square) had one removable side, which acted as a lid, and a mechanism to allow the core to be extruded sideways and subsampled into slabs of any desired size. A sliding weight provided extra stability to keep the barrel vertical during penetration. During recovery, a perforated plate was fitted into the barrel and pressed onto the core surface with a rod before the barrel was brought on board to prevent slumping. This tended to destroy the integrity of the top 2cm of the core, but produced a better result than a slumped core. The corer successfully produced cores up to 2.6m long, providing a sedimentary record from the present day back to the late Pleistocene. The large size of the core (15 cm square) provided adequate material for subsamples to be provided for several research groups. The core was subsampled by pressing square section PVC conduit (1m long and 6cm square) into the opened surface of the core. Samples (approximately 10 cubic centimetres volume) were taken, using a syringe, from the 4cm spaces between the conduit and stored in airtight containers for water content analysis. The core was then raised by 6 cm and the conduit was detached from the core using a cheese wire. The samples were then closed, sealed and stored in wooden trays. A layer of plastic trays (33 cm by 15 cm and

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