Back to Search Start Over

Conjugated enrichments in arsenic and antimony in marine deposits used as paleoenvironmental proxies: preliminary results

Authors :
Tribovillard Nicolas
Source :
BSGF-Earth Sciences Bulletin, Vol 192, p 39 (2021)
Publication Year :
2021
Publisher :
EDP Sciences, 2021.

Abstract

Two redox-sensitive metalloids, arsenic (As) and antimony (Sb), are examined here to determine what can be their help in the deciphering of past depositional conditions. The enrichment factors of the two elements are compared for a set of geological formations and marine deposits covering a relatively wide range of paleoenvironmental settings, from oxic to euxinic conditions. This work confirms that As and Sb are not robust paleoredox proxies but examining their relative enrichment may be useful. These preliminary results indicate that a co-enrichment of both elements with Sb being more enriched than As could be the mark of the so-called particulate shuttle effect. Notably, Sb would be more sensitive to Mn-shuttling than As. If confirmed, this trend could be used to further identify the cause of As-enrichment in marine sediments impacted by cold seepage fluids.

Details

ISSN :
17775817
Volume :
192
Database :
OpenAIRE
Journal :
BSGF - Earth Sciences Bulletin
Accession number :
edsair.doi.dedup.....30486aeeecac7f5928183e293f9072ec
Full Text :
https://doi.org/10.1051/bsgf/2021034