The Upper Aptian-Albian Succession of the Sergipe Basin, Brazil: An Integrated Paleoenvironmental Assessment (1)

Drilling the Aptian–Albian of the Sergipe–Alagoas Basin, Brazil: paleobiogeographic and paleoceanographic studies in the South Atlantic

“…In addition, the late Aptian-Albian interval has been characterized by an important time in the evolution of planktonic foraminifera including extinction and speciation events and changes in shell architecture (e.g., Leckie et al, 2002;Huber and Leckie, 2011;Petrizzo et al, 2012). Thus, late Aptian foraminiferal assemblages showed larger, heavily ornamented species, whereas the Albian foraminiferal assemblages comprise small-sized species in different deep-sea sites in the Atlantic and Indian oceans (Huber and Leckie, 2011).…”

“…The Aptian-Albian interval is characterized by significant paleoclimatic, paleoceanographic, and paleogeographic changes. In addition, important perturbations in the global carbon cycle, the development of large igneous provinces (LIPs) such as the Kerguelen Plateau and Rajmahal Traps, and an increase of the global sea level have also been recognized (e.g., Leckie et al, 2002;Courtillot and Renne, 2003;Haq, 2014). These changes affected the distribution and evolution of marine ecosystems on a worldwide scale (e.g., Dias-Brito, 1987;Riccardi, 1991;Leckie et al, 2002;Browning and Watkins, 2008;Huber and Leckie, 2011;McAnena et al, 2013;Coccioni et al, 2014;Dummann et al, 2020).…”

“…In addition, important perturbations in the global carbon cycle, the development of large igneous provinces (LIPs) such as the Kerguelen Plateau and Rajmahal Traps, and an increase of the global sea level have also been recognized (e.g., Leckie et al, 2002;Courtillot and Renne, 2003;Haq, 2014). These changes affected the distribution and evolution of marine ecosystems on a worldwide scale (e.g., Dias-Brito, 1987;Riccardi, 1991;Leckie et al, 2002;Browning and Watkins, 2008;Huber and Leckie, 2011;McAnena et al, 2013;Coccioni et al, 2014;Dummann et al, 2020). This interval contains multiple black shale horizons associated with oceanic anoxic events (OAEs) such as the Selli, 113/Jacob, Kilian, Urbino/Paquier, and Leenhardt events (e.g., Erbacher et al, 1999;Leckie et al, 2002;Browning and Watkins, 2008;Jenkyns, 2010;Coccioni et al, 2014;Sabatino et al, 2015Sabatino et al, , 2018Bottini and Erba, 2018).…”

“…These changes affected the distribution and evolution of marine ecosystems on a worldwide scale (e.g., Dias-Brito, 1987;Riccardi, 1991;Leckie et al, 2002;Browning and Watkins, 2008;Huber and Leckie, 2011;McAnena et al, 2013;Coccioni et al, 2014;Dummann et al, 2020). This interval contains multiple black shale horizons associated with oceanic anoxic events (OAEs) such as the Selli, 113/Jacob, Kilian, Urbino/Paquier, and Leenhardt events (e.g., Erbacher et al, 1999;Leckie et al, 2002;Browning and Watkins, 2008;Jenkyns, 2010;Coccioni et al, 2014;Sabatino et al, 2015Sabatino et al, , 2018Bottini and Erba, 2018). In addition, the Aptian-Albian was one of the most recent prolonged periods of stable polarity in the magnetic field of the Earth, the so-called Cretaceous Normal Superchron (CNS), which occurred approximately from 121 to 83 Ma (Helsley and Steiner, 1968;Gee and Kent, 2007;He et al, 2008).…”

Geochemical factors associated with deposition of lower Aptian organic-rich sediments during OAE1a in the Basque-Cantabrian Basin, northern Spain

“…These Cretaceous anoxic events are well documented since the Valanginian (e.g., Lini et al, 1992;Aguirre-Urreta et al, 2008) through the Santonian (Wagreich, 2012). Such an event is widely recognized as OAE1a which characterizes lower Aptian sediments (e.g., Schlanger and Jenkyns, 1976;Arthur, 1979;Arthur et al, 1990;Koutsoukos et al, 1991a;Koutsoukos et al, 1991b;Kuhnt et al, 1998;Masse and Machhour, 1998;Menegatti et al, 1998;Mutterlose and Böckel, 1998;Scarparo Cunha and Koutsoukos, 1998;Larson and Erba, 1999;Maurrasse and Ponton, 2005;Coccioni et al, 2006;Abu-Zied, 2007;Barragán and Maurrasse, 2008;Michalík et al, 2008;Yilmaz, 2008;Moreno-Bedmar et al, 2009;Moreno-Bedmar, 2010;Föllmi, 2012;Husinec et al, 2012;Léonide et al, 2012;Roban and Melinte-Dobrinescu, 2012;Elkhazri et al, 2013;Gaona-Narvaez et al, 2013;Socorro and Maurrasse, 2019;Hu et al, 2020;Socorro and Maurrasse, 2020;Herdocia and Maurrasse, 2022;Socorro and Maurrasse, 2022). These studies (herein above) generally agree that different marine physiographic conditions may respond with varieties of facies during OAEs exclusive of black shales and with remarkable differences in degrees of oxygen depletion which may not show OM-rich sediments.…”