Results 41 to 50 of about 8,027 (255)

Bio-chemostratigraphy of the Barremian-Aptian shallow-water carbonates of the southern Apennines (Italy): pinpointing the OAE1a in a Tethyan carbonate platform [PDF]

, 2012
Low biostratigraphic resolution and lack of chronostratigraphic calibration hinder precise correlations between platform carbonates and coeval deep-water successions.
DI LUCIA M., MUTTI M., PARENTE, MARIANO, TRECALLI, ALBERTO   +3 more
core   +2 more sources

The SPICE carbon isotope excursion in Siberia: A combined study of the upper Middle Cambrianlowermost Ordovician Kulyumbe River section, northwestern Siberian Platform [PDF]

, 2008
An integrated, high-resolution chemostratigraphic (C, O and Sr isotopes) and magnetostratigraphic study through the upper Middle Cambrian–lowermost Ordovician shallowmarine carbonates of the northwestern margin of the Siberian Platform is reported. The
Kouchinsky, Artem
core   +3 more sources

Hg Isotopes and Enhanced Hg Concentration in the Meishan and Guryul Ravine Successions: Proxies for Volcanism Across the Permian-Triassic Boundary

Frontiers in Earth Science, 2021
High-resolution organic carbon isotope (δ13C), Hg concentration and Hg isotopes curves are presented for the Permian-Triassic boundary (PTB) sections at Guryul Ravine (India) and Meishan D (China).
Alcides Nóbrega Sial, Jiubin Chen, Christoph Korte, Manoj Kumar Pandit, Jorge E. Spangenberg, Juan Carlos Silva-Tamayo, Luiz Drude de Lacerda, Valderez Pinto Ferreira, José Antônio Barbosa, Claudio Gaucher, Natan Silva Pereira, Paulo Ricardo Riedel   +11 more
doaj   +1 more source

Mercury anomalies associated with three extinction events (Capitanian Crisis, Latest Permian Extinction and the Smithian/Spathian Extinction) in NW Pangea [PDF]

, 2015
Copyright © Cambridge University Press 2015. Strata of Permian - Early Triassic age that include a record of three major extinction events (Capitanian Crisis, Latest Permian Extinction and the Smithian/Spathian Extinction) were examined at the Festningen
Beauchamp, Benoit, Bond, David P.G., Grasby, Stephen E., Sanei, Hamed, Wignall, Paul B.   +4 more
core   +1 more source

C- and Sr-isotope stratigraphy of the São Caetano complex, Northeastern Brazil: a contribution to the study of the Meso-Neoproterozoic seawater geochemistry

Anais da Academia Brasileira de Ciências, 2005
C-isotope and 87Sr/86Sr values for five carbonate successions from the São Caetano Complex, northeastern Brazil, were used to constrain their depositional age and to determine large variations in the C- and Sr-isotopic composition of seawater under the ...
Juan C. Silva, Alcides N. Sial, Valderez P. Ferreira, Márcio M. Pimentel   +3 more
doaj   +1 more source

The Nitrogen Cycle in an Epeiric Sea in the Core of Gondwana Supercontinent: A Study on the Ediacaran-Cambrian Bambuí Group, East-central Brazil

Frontiers in Earth Science, 2021
The Ediacaran-Cambrian transition is marked by the diversification of metazoans in the marine realm. However, this is not recorded by the Ediacaran-Cambrian Bambuí Group of the São Francisco basin, Brazil. Containing the sedimentary record of a partially
Paula Luiza Fraga-Ferreira, Magali Ader, Sérgio Caetano-Filho, Pierre Sansjofre, Gustavo Macedo Paula-Santos, Marly Babinski, Cristian Guacaneme, Carolina Bedoya-Rueda, Virginia Rojas, Humberto L. S. Reis, Matheus Kuchenbecker, Ricardo I. F. Trindade   +11 more
doaj   +1 more source

Aras Valley (northwest Iran): high-resolution stratigraphy of a continuous central Tethyan Permian–Triassic boundary section [PDF]

Fossil Record, 2020
The Permian–Triassic boundary section in the Aras Valley in NW Iran is investigated with respect to carbonate microfacies, biostratigraphy (particularly conodonts, nautiloids, and ammonoids), chemostratigraphy (carbon isotopes), and environmental setting.
J. Gliwa, A. Ghaderi, L. Leda, M. Schobben, S. Tomás, W. J. Foster, W. J. Foster, M.-B. Forel, N. Ghanizadeh Tabrizi, S. E. Grasby, U. Struck, A. R. Ashouri, D. Korn   +12 more
doaj   +1 more source

The Steptoean Positive Carbon Isotope Excursion (SPICE), inorganic aragonite precipitation and sea water chemistry: Insights from the Middle–Late Cambrian Port au Port Group, Newfoundland

The Depositional Record, 2022
The Late Cambrian Steptoean Positive Carbon Isotope Excursion marks a time of significant change in ocean chemistry and trilobite faunas. On the lead up to the carbon isotope excursion and at the excursion itself, there is global evidence from Laurentia ...
Joyce E. Neilson, Rosalia Barili, Alexander Brasier, Luiz F. De Ros, Sarah Ledingham   +4 more
doaj   +1 more source

Advances in sediment geochemistry and chemostratigraphy for reservoir characterization

Energy Geoscience, 2021
Sedimentary sequences preserve the records of changes in major controls of sedimentation namely, tectonics, climate, relative sea level and sediment production and preservation.
Mu Ramkumar, R. Nagarajan, M. Santosh
doaj   +1 more source

Selective Recording of Tectonic Forcings in an Oligocene/Miocene Submarine Channel System: Insights From New Age Constraints and Sediment Volumes From the Austrian Northern Alpine Foreland Basin

Frontiers in Earth Science, 2019
Detailed characterization of variations in sediment architecture, flux, and transport processes in peri-orogenic basins offers insights into external climatic or tectonic forcings.
Julian Hülscher, Gero Fischer, Patrick Grunert, Gerald Auer, Anne Bernhardt   +4 more
doaj   +1 more source