The sequestration of trace metals preserved in pyritized burrows

Brolly, C., Parnell, J. and Wang, X. (2021) The sequestration of trace metals preserved in pyritized burrows. Sedimentary Geology, 421, p. 105959. (doi: 10.1016/j.sedgeo.2021.105959)

Abstract

Pyritized burrows from three localities were analysed using LA-ICP-MS to determine their trace element content and assess their ability to sequester trace elements. Pyritic burrows from Hock Cliff (Jurassic), Wren's Nest (Silurian) and Southerham Grey Pit (Cretaceous) have anomalous levels of Se, Cu and Pb and are enriched relative to their host sediments. Sequestration rates were calculated using sedimentation rates from similar depositional environments. Results show that pyritic burrows, mediated by bacterial sulphate reduction, can sequester Se, Cu and Pb up to 3 orders of magnitude greater than the rate of Fe–Mn crusts, which are considered rich sources of trace elements, demonstrating that bioturbated marine sediments are significant sinks of trace elements.

• Item Type: Articles
• Additional Information: This work was supported by NERC grant NE/M010953/1.
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Brolly, Dr Connor
• Authors: Brolly, C., Parnell, J., and Wang, X.
• College/School: College of Science and Engineering > Scottish Universities Environmental Research Centre
• Journal Name: Sedimentary Geology
• Publisher: Elsevier
• ISSN: 0037-0738
• ISSN (Online): 1879-0968
• Published Online: 01 July 2021
• Copyright Holders: Copyright © 2021 Elsevier B.V.
• First Published: First published in Sedimentary Geology 421: 105959
• Publisher Policy: Reproduced in accordance with the publisher copyright policy