Results 61 to 70 of about 8,217 (293)

Chemostratigraphy of the Cretaceous Yolde Formation in Yola Sub-Basin, Northern Benue Trough, Ne Nigeria

Dutse Journal of Pure and Applied Sciences
This research aims to determine the chemostratigraphy of the Yolde Formation. The formation has been inadequately studied  systematically in the light of chemostratigraphy.
Ahmad Fauziyah Rufai, K. S. Nuhu, A. Maigari, B. Finthan   +3 more
semanticscholar   +1 more source

The Lomagundi-Jatuli carbon isotopic event recorded in the marble of the Tandilia System basement, Río de la Plata Craton, Argentina [PDF]

, 2019
The “Lomagundi-Jatuli event” corresponds to the most important δ13C positive anomaly (≥5‰) globally reported in Palaeoproterozoic marine carbonates (between ∼2.30 and 2.06 Ga).
Ballivian Justiniano, Carlos Alberto, Cingolani, Carlos Alberto, Etcheverry, Ricardo Oscar, Lajoinie, Maria Florencia, Lanfranchini, Mabel Elena, Recio, C., Sial, A.N.   +6 more
core   +1 more source

Mercury Anomalies Link to Extensive Volcanism Across the Late Devonian Frasnian–Famennian Boundary in South China

Frontiers in Earth Science, 2021
The Late Devonian Frasnian–Famennian (F–F) mass extinction has been long-time debated by non-volcanic causes, extra-terrestrial impacts, and large igneous province (LIP) eruptions.
Jiawei Zhang, Jiawei Zhang, Changzhou Deng, Weipeng Liu, Zuoqi Tang, Yue Wang, Taiping Ye, Weian Liang, Lingyun Liu   +8 more
doaj   +1 more source

Carbon isotope chemostratigraphy of the Yucca Formation from the Solitario, Big Bend Ranch State Park, Texas

Frontiers in Earth Science
Introduction: The Yucca Formation is a Lower Cretaceous sedimentary unit present in West Texas. Based on its relative stratigraphic position in the Cretaceous succession of West Texas, it is expected that the Yucca Formation is of Albian and/or Aptian ...
E. J. Biebesheimer, M. B. Suarez
doaj   +1 more source

Chemostratigraphic implications of spatial variation in the Paleocene‐Eocene Thermal Maximum carbon isotope excursion, SE Bighorn Basin, Wyoming

Geochemistry, Geophysics, Geosystems, 2013
The Paleocene‐Eocene Thermal Maximum (PETM) is marked by a prominent negative carbon isotope excursion (CIE) of 3–5‰ that has a characteristic rapid onset, stable body, and recovery to near pre‐CIE isotopic composition.
Allison A. Baczynski, Francesca A. McInerney, Scott L. Wing, Mary J. Kraus, Jonathan I. Bloch, Doug M. Boyer, Ross Secord, Paul E. Morse, Henry C. Fricke   +8 more
doaj   +1 more source

Geochemistry of the Northern Paraná Continental Flood Basalt (PCFB) Province: implications for regional chemostratigraphy

Brazilian Journal of Geology
: The Paraná Continental Flood Basalt (PCFB) province is one of the largest igneous provinces on Earth, but little is known about the architecture and geochemical characteristics of the lava flows.
Fábio Braz Machado, Eduardo Reis Viana Rocha-Júnior, Leila Soares Marques, Antonio José Ranalli Nardy, Larissa Vieira Zezzo, Natasha Sarde Marteleto   +5 more
doaj   +1 more source

Revisiting Ediacaran sulfur isotope chemostratigraphy with in situ nanoSIMS analysis of sedimentary pyrite

Geology, 2021
Reconstructions of ancient sulfur cycling and redox conditions commonly rely on sulfur isotope measurements of sedimentary rocks and minerals. Ediacaran strata (635–541 Ma) record a large range of values in bulk sulfur isotope difference (Δ34S) between ...
Wei Wang, Yongliang Hu, A. Muscente, Huan Cui, C. Guan, J. Hao, Chuanming Zhou   +6 more
semanticscholar   +1 more source

Stratigraphy and geochronology of the Tambien Group, Ethiopia: evidence for globally synchronous carbon isotope change in the Neoproterozoic [PDF]

, 2015
The Neoproterozoic Era was an interval characterized by profound environmental and biological transitions. Existing age models for Neoproterozoic nonglacial intervals largely have been based on correlation of carbonate carbon isotope values, but there ...
Alene, Mulugeta, Condon, Daniel J., Haileab, Berket, Jenkin, Gawen R.T., Maloof, Adam C., Rooney, Alan D., Swanson-Hysell, Nicholas L., Tesema, Tadale, Tremblay, Marissa M.   +8 more
core   +2 more sources

Hirnantian Isotope Carbon Excursion in Gorny Altai, southwestern Siberia [PDF]

Estonian Journal of Earth Sciences, 2015
The Hirnantian Isotope Carbon Excursion (HICE), a glaciation-induced positive δ13C shift in the end-Ordovician successions, has been widely used in chemostratigraphic correlation of the Ordovician–Silurian boundary beds in many areas of the world ...
Nikolay V. Sennikov, Leho Ainsaar, Tõnu Meidla   +2 more
doaj   +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