# Assessing orbital vs. volcanic control on carbon cycle during the Early Cretaceous

Mathieu Martinez, Beatriz Aguirre-Urreta, Marina Lescano, Guillaume Dera, Julieta Omarini, Maisa Tunik, Tomas Frederichs, Heiko Pälike, Luis O'Dogherty, Roque Aguado, et al.

► To cite this version:

Mathieu Martinez, Beatriz Aguirre-Urreta, Marina Lescano, Guillaume Dera, Julieta Omarini, et al. "Assessing orbital vs. volcanic control on carbon cycle during the Early Cretaceous." vEGU21, 2021, à renseigner, Unknown Region. 10.5194/egusphere-egu21-11871. insu-03669248

HAL Id: insu-03669248

https://insu.hal.science/insu-03669248

Submitted on 31 May 2023

HAL is a multi-disciplinary open access
archive for the deposit and dissemination of sci-
entific research documents, whether they are pub-
lished or not. The documents may come from
teaching and research institutions in France or
abroad, or from public or private research centers.

L'archive ouverte pluridisciplinaire HAL, est
destinée au dépôt et à la diffusion de documents
scientifiques de niveau recherche, publiés ou non,
émanant des établissements d'enseignement et de
recherche français ou étrangers, des laboratoires
publics ou privés.
<figure><img src="image_1.png" /></figure>

# Assessing orbital vs. volcanic control on carbon cycle during the Early Cretaceous

**Mathieu Martinez**<fnref n="1" />, **Beatriz Aguirre-Urreta**<fnref n="2" />, **Marina Lescano**<fnref n="2" />, **Guillaume Dera**<fnref n="3" />, **Julieta Omarini**<fnref n="4" />,<fnref n="5" />, **Maisa Tunik**<fnref n="4" />, **Tomas Frederichs**<fnref n="6" />, **Heiko Pälike**<fnref n="6" />, **Luis O'Dogherty**<fnref n="7" />, **Roque Aguado**<fnref n="8" />, **Miguel Company**<fnref n="9" />, and **Jose Sandoval**<fnref n="9" />

The interval from the Valanginian to the Barremian stages (137–121 Ma; Early Cretaceous) is punctuated by several episodes of environmental changes, accompanied by shifts in weathering intensity on the continents and changes in the Tethyan neritic carbonate production. We synthetize here the astrochronology of two recent studies performed in the Neuquén basin, Vocontian Basin and Subbetic Domain (Aguirre-Urreta et al., 2019; Martinez et al., 2020), anchored to CA-ID-TIMS U-Pb ages, which conclusions have been included in the Geologic Time Scale 2020 (Gale et al, in press). We applied this time scale to a compilation of carbon-isotope ratio from belemnites and proxies of detrital supply in the Tethyan area (Vocontian Basin and Subbetic Domain). From this compilation, we show that the episodes of environmental changes are paced by a 2.4-Myr cycle and, with a lower amplitude, a 1.2-Myr cycle. In addition, the new time scale shows the synchronicity between the Weissert Event and the Parana-Etendeka Large Igneous Province. In the series of carbon-isotope ratios measured on belemnite rostra, the amplitude of the 2.4-Myr cycle is twice higher during the Valanginian than in the Late Barremian and three times higher than in the Hauterivian and Early Barremian, suggesting that the activity of the Parana-Etendeka Large Igneous Province amplified the initial orbital forcing to trigger the environmental changes observed during the Mid-Valanginian.

## Reference:

Aguirre-Urreta, B., Martinez, M., Schmitz, M., Lescano, M., Omarini, J., Tunik, M., Kuhnert, H.,

<footnote n="1">¹Univ. Rennes, Géosciences Rennes, Vandoeuvre-les-Nancy, France (mathieu.martinez@univ-rennes1.fr)</footnote>

<footnote n="2">²Instituto de Estudios Andinos Don Pablo Groeber, CONICET & Universidad de Buenos Aires, Ciudad Universitaria, pabellón 2, 1428 Buenos Aires, Argentina</footnote>

<footnote n="3">³Géosciences Environnement Toulouse (GET), Université Paul Sabatier Toulouse 3, CNRS UMR 5563, IRD, Toulouse, France</footnote>

<footnote n="4">⁴Instituto de Investigación en Paleobiología y Geología, CONICET & Universidad de Río Negro, Sede Alto Valle, 8332 General Roca, Río Negro, Argentina</footnote>

<footnote n="5">⁵IIPG, CONICET. Av. J. A. Roca 1242, General Roca, Río Negro, Argentina</footnote>

<footnote n="6">⁶MARUM: Center for marine Environmental Sciences, Leobener Strasse 8, Universität Bremen, 28359 Bremen, Germany</footnote>

<footnote n="7">⁷Departamento Ciencias de la Tierra, Universidad de Cádiz, CASEM, 11510 Puerto Real, Spain</footnote>

<footnote n="8">⁸Departamento de Geología y CEACTEMA, Universidad de Jaén, Campus Científico-Tecnológico de Linares, 23700 Linares, Spain</footnote>

<footnote n="9">⁹Departamento de Estratigrafía y Paleontología, Universidad de Granada, 18002 Granada, Spain</footnote>
Concheyro, A., Rawson, P.F., Ramos, V.A., Reboulet, S., Noclin, N., Frederichs, T., Nickl, A.-L., Pälike, H., 2019. Interhemispheric radio-astrochronological calibration of the time scales from the Andean and the Tethyan areas in the Valanginian–Hauterivian (Early Cretaceous). Gondwana Research 70, 104-132. https://doi.org/10.1016/j.gr.2019.01.006.

Gale, A.S., Mutterlose, J., Batenburg, S., in press. Chapter 27: The Cretaceous Period, in: Gradstein, F.M., Ogg, J.G., Schmitz, M.D., Ogg, G.M. (Eds.) Geologic Time Scale 2020. Elsevier BV, Amsterdam, The Netherlands, pp. 1023–1086.

Martinez, M., Aguado, R., Company, M., Sandoval, J., O'Dogherty, L., 2020. Integrated astrochronology of the Barremian Stage (Early Cretaceous) and its biostratigraphic subdivisions. Global and Planetary Change 195, 103368. https://doi.org/10.1016/j.gloplacha.2020.103368.