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pro vyhledávání: '"N. Sial"'
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Autor:
N. S. Pereira, C. M. Chiessi, S. Crivellari, K. H. Kilbourne, R. K. P. Kikuchi, B. P. Ferreira, R. J. A. Macêdo, M. C. M. dosSantos, M. G. Pereira, L. S. Neves da Rocha, A. N. Sial
Publikováno v:
Geochemistry, Geophysics, Geosystems, Vol 25, Iss 8, Pp n/a-n/a (2024)
Abstract Coral‐based stable oxygen isotopes (δ18O) have been used as a proxy for sea surface temperature (SST) since the 1970s, and δ18O–SST calibration studies have been fundamental to assure robust and faithful SST reconstructions. Paleoclima
Externí odkaz:
https://doaj.org/article/2d8d0026e2294707ab491234147fea6f
Autor:
Fabricio A. Caxito, Erik Sperling, Gabriella Fazio, Rodrigo Rodrigues Adorno, Matheus Denezine, Dermeval Aparecido Do Carmo, Martino Giorgioni, Gabriel J. Uhlein, Alcides N. Sial
Publikováno v:
Geoscience Frontiers, Vol 15, Iss 4, Pp 101810- (2024)
The Ediacaran–Cambrian transition witnessed some of the most important biological, tectonic, climatic and geochemical changes in Earth’s history. Of utmost importance for early animal evolution is the likely shift in redox conditions of bottom wa
Externí odkaz:
https://doaj.org/article/a7301df0b0dd4998b59359e9fb02d978
Autor:
Fabricio Caxito, Cristiano Lana, Robert Frei, Gabriel J. Uhlein, Alcides N. Sial, Elton L. Dantas, André G. Pinto, Filippe C. Campos, Paulo Galvão, Lucas V. Warren, Juliana Okubo, Carlos E. Ganade
Publikováno v:
Scientific Reports, Vol 11, Iss 1, Pp 1-15 (2021)
Abstract We combine U–Pb in-situ carbonate dating, elemental and isotope constraints to calibrate the synergy of integrated mountain-basin evolution in western Gondwana. We show that deposition of the Bambuí Group coincides with closure of the Goi
Externí odkaz:
https://doaj.org/article/34b267a34b9f4faa8c4825288af8dad6
Publikováno v:
Agrociencia Uruguay, Vol 26, Iss NE1, p e799 (2022)
The Chuy Formation is characterized by up to 135 m of an alternation of green pelites and fine to coarse sandstones with sparse invertebrate fossils. The marine deposits are interbedded with continental, loessic deposits of the Libertad Formation and
Externí odkaz:
https://doaj.org/article/68bcbaeb3beb4b28955ff4390d769676
Publikováno v:
Anuário do Instituto de Geociências, Vol 42, Iss 4, Pp 349-358 (2020)
This work focuses on the behavior of the C and O isotopes and major and trace element chemistry of the carbonate rocks of the Tambaba Formation, Paraíba Basin, Northeastern Brazil. Thirteen carbonate samples collected from three vertical profiles l
Externí odkaz:
https://doaj.org/article/0092384e0c5041b7842221c5c2516043
Publikováno v:
Anais da Academia Brasileira de Ciências, Vol 93, Iss suppl 4 (2021)
Abstract The Tamboril and Olho d’Água granitic stocks are part of the abundant calc-alkalic magmatic epidote-bearing granitic rocks in the Cachoeirinha–Salgueiro Terrane (CST) in the Transversal Zone Domain, northeastern Brazil. The equigranular
Externí odkaz:
https://doaj.org/article/b2a0211fd52b4c1c94734dc3e770a30d
Autor:
Lucía E. Gómez-Peral, M. Julia Arrouy, M. Sol Raigemborn, Camila Ferreyra, Victoria Penzo, Alcides N. Sial, Daniel G. Poiré
Publikováno v:
International Journal of Earth Sciences. 112:1503-1525
Autor:
Alejandro R. Gómez Dacal, Damián Moyano Paz, Luis A. Spalletti, Lucía E. Gómez Peral, Alcides N. Sial
Publikováno v:
Latin American Journal of Sedimentology and Basin Analysis, Vol 26, Iss 1 (2021)
Con el objetivo de conocer como varía la composición geoquímica de las aguas con la profundidad y que factores influyen en estos cambios, se realizaron estudios de tierras raras e isótopos estables sobre sucesiones sedimentarias definidas ambient
Externí odkaz:
https://doaj.org/article/c8a5e6f716f24fa1a6e74b4facecf55f
Autor:
NATAN S. PEREIRA, ALCIDES N. SIAL, PATRÍCIA B. PINHEIRO, FABRÍCIO L. FREITAS, ADRIANA M.C. SILVA
Publikováno v:
Anais da Academia Brasileira de Ciências, Vol 93, Iss 1 (2021)
Abstract Fish otoliths store geochemical and isotopic signatures that can be used as proxies for environmental conditions in ecological investigations. We investigated the δ13C and δ18O of otoliths of four freshwater fish species (Astronotus ocella
Externí odkaz:
https://doaj.org/article/996583d6fcea4fde946e7c06fad567dc