Results 31 to 40 of about 1,389 (158)

Evidence From Microscopy and U–Pb Geochronology as a Clue to the Influence of the Cretaceous Magmatism in the Diagenesis of Pre‐Salt Carbonate Reservoirs in the Santos Basin (Brazil)

Geological Journal, EarlyView.
Carbonates from Santos Basin revealed U–Pb ages correlated with basalt ages (A), suggesting that they were formed during magmatic events. These events placed hot CO2 in the reservoir, which, when mixed with carbonate‐rich cold water (B), led to thermal convection, enabling the formation of the U contained in the carbonates.
Marco António Ruivo de Castro e Brito, Cristiano Leite Sombra, Davy Raeder Brandão, Cleverson Guizan Silva, Sidney Luiz de Matos Mello, Eugênio Vaz dos Santos Neto, Rui Jorge Fernandes Baptista, Ramsés Capilla, Luiz Antônio Pierantoni Gambôa   +8 more
wiley   +1 more source

First evidence of the early cretaceous oceanic anoxic events (MBE and OAE1a) in the southern Tethyan margin (NE-Tunisia): biostratigraphy and shale resource system

Journal of Petroleum Exploration and Production Technology, 2021
The Jebel Oust region (north-eastern Tunisia) recorded two levels of marine black shale in the Lower Cretaceous marly series. Geodynamic evolution, biostratigraphic and Rock–Eval analysies allow classifying those black shales as unconventional shale oil ...
Rachida Talbi, Ahlem Amri, Abdelhamid Boujemaa, Hakim Gabtni, Reginal Spiller, Raymond Levey   +5 more
doaj   +1 more source

Atmospheric pCO₂ Reconstruction of Early Cretaceous Terrestrial Deposits in Texas and Oklahoma Using Pedogenic Carbonate and Occluded Organic Matter

Geosciences, 2022
Pedogenic carbonate samples collected from three Lower Cretaceous (Aptian–Albian) fossil localities in Texas and Oklahoma were analyzed to develop paleoatmospheric pCO2 estimates by measuring the stable carbon isotopes of pedogenic calcite and their co ...
Kate Andrzejewski, Neil Tabor, Dale Winkler, Timothy Myers   +3 more
doaj   +1 more source

The making of pure quartzose sand in continental interiors: Paraná River (Brazil and Argentina)

Sedimentology, EarlyView.
ABSTRACT As part of a comprehensive project on sedimentary processes in South America, this study focuses on sediment generation in the intracratonic Paraná Basin and monitors the evolution of sand composition along the Paraná River from central Brazil to the Río de la Plata estuary in Argentina.
Eduardo Garzanti, Marta Barbarano, Mara Limonta, Guido Pastore, Pieter Vermeesch, Giovanni Vezzoli   +5 more
wiley   +1 more source

Umbria-Marche Basin, Central Italy: A Reference Section for the Aptian-Albian Interval at Low Latitudes

Scientific Drilling, 2012
Within the Cretaceous Period, the Aptian-Albian interval (125–99.6 Ma, Ogg et al., 2008) was a critical time on a global scale. This is evident from 1) changes in the nature of the ocean-climate system brought about by increased ocean crust production ...
Renato Paes de Almeida, Grasiane Luz Mathias, Jairo Savian, Liliane Janikian, Fabrizio Frontalini, Gerson Fauth, Carla Bucci, Giuseppe Bancalà, Luigi Jovane, Rodolfo Coccioni, Ricardo Ivan Ferreira da Trindade   +10 more
doaj   +1 more source

Barremian-early Aptian charophyte biostratigraphy

, 2021
New Barremian-early Aptian charophyte biozonations are proposed here based on the charophyte succession in the Maestrat Basin (Iberian Chain, Spain). Biostratigraphic analysis distinguished two biozonations, European and Eurasian, which were compared to establish correlations.
Pérez Cano, Jordi, Bover-Arnal, Telm, Martín-Closas, Carles   +2 more
openaire   +1 more source

The systematic affinities between the Lower Cretaceous Ammonoidea Protacanthoplites abichi (Anthula, 1900) and Acanthohoplites aschiltaensis (Anthula, 1900)

European Journal of Taxonomy, 2023
This work provides the first revision and illustration of the type material of the ammonite species Parahoplites abichi Anthula [Type species of Protacanthoplites Tovbina] and Parahoplites aschiltaensis Anthula [Type species of Acanthohoplites Sinzow ...
Camille Frau
doaj   +1 more source

Correction to: Aptian–Albian shale oil unconventional system as registration of Cretaceous oceanic anoxic sub-events in the southern Tethys (Bir M’Cherga basin, Tunisia)

Journal of Petroleum Exploration and Production Technology, 2018
In the original publication, article title has been incorrectly published as “Aptian–Albian oil shale unconventional system as registration of Cretaceous oceanic anoxic sub-events in the southern Tethys (Bir M’Cherga basin, Tunisia)” instead of Aptian ...
Rachida Talbi, Rached Lakhdar, Amor Smati, Reginal Spiller, Raymond Levey   +4 more
doaj   +1 more source

The lower Aptian ammonites of the Les Ferres Aptian Basin (Lower Cretaceous, Southeast of France) Part I: Introduction and biostratigraphy [PDF]

Carnets de géologie (Notebooks on geology), 2019
On the southern margin of the Vocontian Basin (SE France), for taphonomic reasons (fragmentation, reworking, pyritization), lower Aptian (Lower Cretaceous) deposits of the interval between the Deshayesites deshayesi and Dufrenoyia furcata zones are usually not suitable for studying the late ontogenetic developments of ammonites (fossil cephalopods). In
Bersac, Stéphane, Bert, Didier
openaire   +2 more sources

Enhancing paleoclimate reconstructions in the late Aptian North-Northeast Brazil using clay mineralogy

Evolving Earth
Paleoclimate changes are commonly analyzed on three distinct scales: small-scale (20–500 kyr), linked to Milankovitch cycles; medium-scale events (∼30 Myr), associated with sea-level changes and tectonic activity; and large-scale (∼300 Myr), related to ...
Victor Matheus Joaquim Salgado-Campos, Luiz Carlos Bertolino, Leonardo Borghi, Aristóteles de Moraes Rios-Netto, Bruno Cesar Araújo, Danielle Cardoso de Souza, Laís de Oliveira Ferreira, Fabia Emanuela Rafaloski Bobco, Jéssica de Souza Gabi Barcellos, Ismar de Souza Carvalho   +9 more
doaj   +1 more source