Cardiff University | Prifysgol Caerdydd ORCA
Online Research @ Cardiff 
WelshClear Cookie - decide language by browser settings

The oceanic budgets of nickel and zinc isotopes: the importance of sulphidic environments as illustrated by the Black Sea

Vance, Derek, Little, Susan H., Archer, Corey, Cameron, Vyllinniskii, Andersen, Morten, Rijkenberg, Micha J. A. and Lyons, Timothy W. 2016. The oceanic budgets of nickel and zinc isotopes: the importance of sulphidic environments as illustrated by the Black Sea. Philosophical Transactions of the Royal Society of London Series A: Mathematical and Physical Sciences 374 (2081) , 20150294. 10.1098/rsta.2015.0294

[img]
Preview
PDF - Accepted Post-Print Version
Download (3MB) | Preview

Abstract

Isotopic data collected to date as part of the GEOTRACES and other programmes show that the oceanic dissolved pool is isotopically heavy relative to the inputs for zinc (Zn) and nickel (Ni). All Zn sinks measured until recently, and the only output yet measured for Ni, are isotopically heavier than the dissolved pool. This would require either a non-steady state ocean or other unidentified sinks. Recently, isotopically light Zn has been measured in organic carbon-rich sediments from productive upwelling margins, providing a potential resolution of this issue, at least for Zn. However, the origin of the isotopically light sedimentary Zn signal is uncertain. Cellular uptake of isotopically light Zn followed by transfer to sediment does not appear to be a quantitatively important process. Here, we present Zn and Ni isotope data for the water column and sediments of the Black Sea. These data demonstrate that isotopically light Zn and Ni are extracted from the water column, likely through an equilibrium fractionation between different dissolved species followed by sequestration of light Zn and Ni in sulphide species to particulates and the sediment. We suggest that a similar, non-quanitative, process, operating in porewaters, explains the Zn data from organic carbon-rich sediments.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Earth and Ocean Sciences
Uncontrolled Keywords: Zinc, nickel, isotopes, Black Sea, oceanic budgets, GEOTRACES
Publisher: Royal Society of London
ISSN: 0080-4614
Date of First Compliant Deposit: 15 September 2016
Date of Acceptance: 26 August 2016
Last Modified: 24 Oct 2017 21:17
URI: http://orca.cf.ac.uk/id/eprint/94594

Citation Data

Cited 26 times in Scopus. View in Scopus. Powered By Scopus® Data

Actions (repository staff only)

Edit Item Edit Item

Downloads

Downloads per month over past year

View more statistics