English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

In modern environments, pore water geochemistry and modelling simulations allow the study of methane (CH 4 ) sources and sinks at any geographic location. However, reconstructing CH 4  dynamics in geological records is challenging. Here, we show that the benthic foraminiferal δ 34 S can be used to reconstruct the flux (i.e., diffusive vs. advective) and timing of CH 4  emissions in fossil records. We measured the δ 34 S of  Cassidulina neoteretis  specimens from selected samples collected at Vestnesa Ridge, a methane cold seep site in the Arctic Ocean. Our results show lower benthic foraminiferal δ 34 S values (∼20‰) in the sample characterized by seawater conditions, whereas higher values (∼25–27‰) were measured in deeper samples as a consequence of the presence of past sulphate-methane transition zones. The correlation between δ 34 S and the bulk benthic foraminiferal δ 13 C supports this interpretation, whereas the foraminiferal δ 18 O-δ 34 S correlation indicates CH 4  advection at the studied site during the Early Holocene and the Younger-Dryas – post-Bølling. This study highlights the potential of the benthic foraminiferal δ 34 S as a novel tool to reconstruct the flux of CH 4  emissions in geological records and to indirectly date fossil seeps.

The benthic foraminiferal δ34S records flux and timing of paleo methane emissions