Data for Oceanic euxinia and seafloor oxygenation linked to continental weathering and influxes during the Late Devonian Frasnian–Famennian bio-crisis and Annulata bio-event

Description

the dataset is used to test the hypotheses that the oceanic euxinia was contributed by land input of nutrients and seafloor was likely oxygenated by hyperpycnal flows, in the Late Devonian Seaway, during the F-F bio-crisis. It also proves that the watermass of the seaway became weakly restricted after the F-F bio-crisis and the seafloor redox shifted from relative oxygenation to silled euxinia. Under such hydrographic and seafloor redox backgrounds, the dataset proves that the silled euxinia was enhanced by continental input during the Annulata bio-event.

Steps to reproduce

Samples from the T-6590 drollcore of the Upper Devonian New Albany Shale were collected in May 2019. The samples were successively processed for organic carbon by EA-IRMS, biomarker by GC-MS, and metal by ICP-MS and ICP-OES from May 2019 to March 2021 in the Molecular Eco-Geochemistry Laboratory of the University of Alabama, Organic Geochemistry Unit of Zhejiang University, Alabama Stable Isotope Laboratory, and ALS Chemex Lab, Ltd. Metal data by ED-XRF were collected from June to July 2021 in the Kentucky Geological Survey. The details of the data collection and generation method can be found in the following publication: Jian Chen, YueHan Lu, YongGe Sun, Nicholas Hogancamp, Man Lu. Oceanic euxinia and seafloor oxygenation linked to continental weathering and influxes during the Late Devonian Frasnian–Famennian bio-crisis and Annulata bio-event, Chemical Geology, 2024.

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