Sedimentology and U-Pb dating of Carboniferous to Permian continental series of the northern Massif Central (France): Local palaeogeographic evolution and larger scale correlations

Abstract

The Carboniferous to Permian volcanic-sedimentary succession shown by the LY-F core from the Lucenay-lès-Aix area, in the northern part of the Massif Central, has been studied in order to obtain both landscape reconstructions (sedimentological analyses) and geochronological constraints (U-Pb dating on zircon and apatite). The lowermost part

Report on ICDP Deep Dust workshops: probing continental climate of the late Paleozoic icehouse–greenhouse transition and beyond

“…The only area in western Europe containing the P-T boundary occurs in the central part of the Germanic Basin (Bourquin et al, 2011), and the correlation with the Paris Basin is well established (e.g., Bourquin et al, 2006Bourquin et al, , 2009. Moreover, the C-P boundary is well defined and dated in nearby outcrops and subsurface data (Ducassou et al, 2019;Pellenard et al, 2017;Mercuzot et al, 2020;Mercuzot, 2020). A number of basins in Germany contain parts of the Permian, with extensively cored sections, but the common occurrence of coarsegrained, high-energy facies (e.g., inferred alluvial-fan, fluvial, volcaniclastic) and lack of a single site traversing the entire (or nearly entire) section are problematic from the perspective of the primary science drivers for the Deep Dust project.…”

“…Together with recent work that reveals mean Variscan paleoelevations of 3300 ± 1000 m at ca. 300 Ma (Dusséaux, 2019), this has significant implications for understanding climatic-tectonic interactions.…”

“…-Geochronology: ash beds are well known throughout the Carboniferous-Permian section of, e.g., the Lodève Basin (Michel et al, 2015), southern Paris Basin (Ducassou et al, 2019), Autun Basin (Pellenard et al, 2017), and associated Carboniferous-Permian basins of France and adjoining regions, and these should be especially visible in the core. Permian volcanism was farther removed from the Anadarko Basin, but tephras (likely from Permian arc(s) of northwestern Mexico) are well recognized in the youngest Permian strata here (Tabor et al, 2011;Geissman et al, 2012) and have been long recognized by industry geologists in the Upper Pennsylvanian and Permian sections of the nearby Permian Basin in western Texas (personal communication, E. Kvale, 2015;S.…”

Carbon and Nitrogen Cycle Dynamic in Continental Late-Carboniferous to Early Permian Basins of Eastern Pangea (Northeastern Massif Central, France)

“…While sedimentological context of northeastern Massif Central CPT basins (France) has been recently updated (Ducassou et al, 2019;Mercuzot et al, 2021;Mercuzot et al, submitted), both the dynamics of OM production and preservation are poorly documented in these areas, except for a few studies (Elsass-Damon 1977;Garel et al, 2017). Moreover, the OM isotopic characterization is still lacking in most studies on continental series from this period, although many studies have successfully demonstrated that carbon and nitrogen isotope signals of OM help to decipher its production (primary productivity), preservation (remineralization), and paleoclimate dynamics (e.g., Hollander and McKenzie, 1991;Hollander et al, 1993;Altabet and Francois, 1994;Schubert and Calvert, 2001;Sephton et al, 2002;Deutsch et al, 2004;Algeo et al, 2008;Kashiyama et al, 2008;Ramaswamy et al, 2008;Schnyder et al, 2009;Thomazo et al, 2009;Jenkyns, 2010;Ader et al, 2014;Ader et al, 2016;Wang et al, 2017).…”

“…In this study, we aim to describe the sedimentary dynamics of OM and associated geochemical signatures from recently radioisotopically-dated continental series of the northeastern Massif Central (Pellenard et al, 2017;Ducassou et al, 2019).…”