Abstract
Expansion of reducing marine environments during the Early Silurian Ireviken biogeochemical event
Abstracts with programs - Geological Society of America, Vol.53(5)
Geological Society of America, 2021 annual meeting; GSA Connects 2021
10/2021
DOI: 10.1130/abs/2021AM-369173
Abstract
New sulfur isotope data, including delta (super 34) S (sub py) (pyrite) and delta (super 34) S (sub CAS) (carbonate-associated sulfate), provide additional evidence for the expansion of reducing oceanic conditions during the early Silurian Ireviken Biogeochemical Event (IBE). This event consists of major perturbations to biogeochemical cycles including major positive carbon and sulfur isotope excursions and increased biotic turnover/extinction. In addition, recent studies have hypothesized that this event coincides with an expansion of reducing marine conditions which allowed for organic carbon burial rates to increase globally leading to the Ireviken positive Carbon Isotope Excursion (ICIE). Recent work in the Altajme core from Gotland, Sweden provides the highest resolution carbon isotopic record of the ICIE in a stratigraphic section and provides an expanded stratigraphic section ideal for studying biogeochemical events. Within the Altajme core, the delta (super 34) S (sub py) values and pyrite concentrations increase at the onset of the ICIE indicating an increase in pyrite burial rates in the marine sediments locally. This dataset along with other previously published delta (super 34) S (sub CAS) datasets from the Baltic and distant basins suggests an expansion of reducing conditions led to an increase in organic carbon burial and the ICIE.
Details
- Title: Subtitle
- Expansion of reducing marine environments during the Early Silurian Ireviken biogeochemical event
- Creators
- Brittany Stolfus - University of IowaLindsi AllmanBradley CramerSeth YoungMikael CalnerEmma HartkeStephan ObornyAlyssa M. Bancroft
- Resource Type
- Abstract
- Publication Details
- Abstracts with programs - Geological Society of America, Vol.53(5)
- Conference
- Geological Society of America, 2021 annual meeting; GSA Connects 2021
- Publisher
- Geological Society of America (GSA)
- DOI
- 10.1130/abs/2021AM-369173
- ISSN
- 0016-7592
- Alternative title
- Geological Society of America, 2021 annual meeting; GSA Connects 2021
- Language
- English
- Date published
- 10/2021
- Academic Unit
- Earth and Environmental Sciences; Iowa Geological Survey; IIHR--Hydroscience and Engineering; International Programs
- Record Identifier
- 9984702715002771
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