Results 61 to 70 of about 8,027 (255)

Late Triassic to Early Jurassic carbon isotope chemostratigraphy and organo-facies evolution in a distal to proximal transect of the North German Basin

International journal of earth sciences
Throughout the Latest Triassic and the Early Jurassic, major changes in paleogeography, climate and eustatic sea-level impacted on the development of shelf depositional environments. Secular trends in environmental conditions were punctuated by transient
W. Ruebsam, Matthias Franz, Jörg Ansorge, K. Obst, L. Schwark   +4 more
semanticscholar   +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

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

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

Local and global controls on carbon isotope chemostratigraphy

, 2022
Over million-year timescales, the geologic cycling of carbon controls long-term climate and the oxidation of Earth's surface. Inferences about the carbon cycle can be made from time series of carbon isotopic ratios measured from sedimentary rocks.
A. Ahm, J. Husson
semanticscholar   +1 more source

A Stratified Redox Model for the Ediacaran Ocean [PDF]

, 2010
The Ediacaran Period (635 to 542 million years ago) was a time of fundamental environmental and evolutionary change, culminating in the first appearance of macroscopic animals.
Chu, Xuelei, Fike, David A., Li, Chao, Love, Gordon D., Lyons, Timothy W., Sessions, Alex L.   +5 more
core   +1 more source

Trans-Atlantic application of the Baltic Middle and Upper Ordovician carbon isotope zonation [PDF]

Estonian Journal of Earth Sciences, 2015
Application of the recently introduced Baltic d13C isotope zonation to a composite North American Darriwilian through Hirnantian succession shows that in most intervals there is good trans-Atlantic agreement not only between the isotope zones but also ...
Stig M. Bergström, Matthew R. Saltzman, Stephen A. Leslie, Annalisa Ferretti, Seth A. Young   +4 more
doaj   +1 more source

Multi‐elemental chemostratigraphy of Triassic mudstones in eastern Svalbard: Implications for source rock formation in front of the World’s largest delta plain

The Depositional Record, 2022
The Triassic Boreal Ocean was a shallow epicontinental basin and the sink of the World's largest delta plain known to date. Nutrient and freshwater supply from this delta have been regarded as important causes for high productivity and water mass ...
Fredrik Wesenlund, S. Grundvåg, V. Engelschiøn, Olaf Thieβen, J. H. Pedersen   +4 more
semanticscholar   +1 more source

Sedimentation and subsidence history of the Lomonosov Ridge [PDF]

, 2006
During the first scientific ocean drilling expedition to the Arctic Ocean (Arctic Coring Expedition [ACEX]; Integrated Ocean Drilling Program Expedition 302), four sites were drilled and cored atop the central part of the Lomonosov Ridge in the Arctic ...
Backman, J., Brinkhuis, H., Clemens, S., Cronin, T., Dickens, G.R., Eynaud, F., Gattacceca, J., Jakobsson, M., Jordan, R.W., Kaminski, M., King, J., Koç, N., Martinez, N.C., Matthiessen, J., McInroy, D., Moore Jr., T.C., Moore, T.C., Moran, K., O'Regan, M., Onodera, J., Pälike, H., Rea, B., Rio, D., Sakamoto, T., Smith, D.C., St. John, K.E.K., Stein, R., Suto, I., Suzuki, N., Takahashi, K., Watanabe, M., Yamamoto, M.   +31 more
core   +2 more sources

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