Journal article
Onset of the Mulde Biogeochemical Event in the Midcontinent Basin (Silurian, USA)
Palaeogeography, palaeoclimatology, palaeoecology, Vol.675, 113096
10/01/2025
DOI: 10.1016/j.palaeo.2025.113096
Abstract
The mid-Silurian (Homerian) Mulde Biogeochemical Event has one of the most highly refined chronologies in the Paleozoic. The turnover of marine benthic and pelagic faunas and floras that defines the biotic component of the event is associated with the initial rise of a double-peaked positive carbonate carbon (δ13Ccarb) isotope excursion. Five previously published UPb ages constrain the duration of the first peak of the δ13Ccarb excursion, which reaches values of up to +5.5 ‰, to as little as a few hundred thousand years. Establishing a robust process understanding of this biogeochemical event requires seamless integration of these high-precision UPb ages with intercontinental chronostratigraphic correlation to temporally compile the records of environmental change while parsing local from global drivers. Our new bio- and chemostratigraphic data from the Midcontinent Basin (USA) fine-tune the chronostratigraphic framework through the onset of the Mulde Event and refine intercontinental comparison with the gold-standard sections of Gotland (Sweden).
•Mulde Event has unparalleled geochronology with six published U-Pb zircon ages.•New paleobathymetric model allows depth-parallel comparison of Mulde Event records.•First integrated study of sections containing Limberlost oolite and Waldron Shale.•Chitinozoan and carbon isotope results refine chrono-correlation with Baltic Basin.
Details
- Title: Subtitle
- Onset of the Mulde Biogeochemical Event in the Midcontinent Basin (Silurian, USA)
- Creators
- C. Klock - Ghent UniversityP.I. McLaughlin - University of Illinois Urbana-ChampaignT. Paton - University of Illinois Urbana-ChampaignA.M. Bancroft - University of IowaG. Cane - University of Illinois Urbana-ChampaignT.R.A. Vandenbroucke - Ghent UniversityP. Emsbo - U.S. Geological Survey, Denver, CO, USA
- Resource Type
- Journal article
- Publication Details
- Palaeogeography, palaeoclimatology, palaeoecology, Vol.675, 113096
- DOI
- 10.1016/j.palaeo.2025.113096
- ISSN
- 0031-0182
- eISSN
- 1872-616X
- Publisher
- Elsevier B.V
- Grant note
- FWO: I013118N HFSP- Human Frontiers Science Program: RGP0066/2021 Research Foundation - Flanders: G038722N King Baudouin Foundation
SEM images were generated using research infrastructure funded through FWO grant I013118N. Carolina Klock and Thijs Vandenbroucke received support from the HFSP- Human Frontiers Science Program (grant RGP0066/2021) . Thijs Vandenbroucke, Patrick McLaughlin and Poul Emsbo acknowledge funding by the Research Foundation - Flanders (research grant G038722N, Monsters of the Apocalypse) . Thijs Van-denbroucke also acknowledges support from the King Baudouin Foundation (Professor T. Van Autenboer Fund) . The authors want to thank Don Mikulic, Carl Brett, Brad Cramer, Bill and Linda Harris, Matt Rine, and Jacques Verniers for fruitful discussions and access to samples. We also thank Sabine Van Cauwenberghe for the palynological lab prepa-rations, and Nina Athanasopoulos and Susie McLaughlin for analyses conducted at the Illinois State Geological Survey. We express our sincere gratitude to Prof. Dr. Mikael Calner and an anonymous reviewer for the insightful feedback and constructive suggestions, which contributed to improving this manuscript. We also thank the guest editors Annalisa Ferretti, Marco Balini, Thomas Servais and David Harper for inviting us to contribute this study to the special volume From Rock to Time. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
- Language
- English
- Date published
- 10/01/2025
- Academic Unit
- Earth and Environmental Sciences; Iowa Geological Survey; IIHR--Hydroscience and Engineering
- Record Identifier
- 9984833482502771
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