Results 71 to 80 of about 6,689 (261)

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

High-precision tephrostratigraphy : tracking the time-varying eruption pulse of Mt. Taranaki, North Island, New Zealand : a thesis presented in partial fulfilment of the requirements for the degree of Doctor of Philosophy in Earth Science, Massey University, Palmerston North, New Zealand [PDF]

, 2017
In this research it was proposed that a more robust record of volcanic activity for Mt. Taranaki (New Zealand) could be derived from tephras (pyroclastic fall deposits) within cores from several lakes and peatlands across a 120o arc, NE-SE of the ...
Damaschke, Magret
core  

Intermittent Beginning to the Formation of Hydrogenous Ferromanganese Nodules in the Vast Field: Insights from Multi-Element Chemostratigraphy Using Microfocus X-ray Fluorescence [PDF]

, 2021
Shiki Machida, Ryo Shimomura, Kentaro Nakamura, Tetsu Kogiso, Yasuhiro Kato   +4 more
openalex   +3 more sources

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

Correlated chemostratigraphy of Mn-carbonate microbialites (Úrkút, Hungary) [PDF]

Gondwana Research, 2016
Abstract The genesis of a suite of Jurassic (Lias) microbialites at the Urkut black shale-hosted manganese carbonate ore body (central Hungary) is described by a two-step microbial formation model that uses mineral chemistry combined with whole-profile (up section) textural context and sulfur isotopic compositions of associated pyrite and barite ...
Polgári Márta Piroska, Németh Tibor, Pál-Molnár Elemér, Futó István, Vigh Tamás, Mojzsis Stephen, James   +5 more
openaire   +2 more sources

Seawater redox variations during the deposition of the Kimmeridge Clay Formation, United Kingdom (Upper Jurassic): evidence from molybdenum isotopes and trace metal ratios [PDF]

, 2010
The Kimmeridge Clay Formation (KCF) and its equivalents worldwide represent one of the most prolonged periods of organic carbon accumulation of the Mesozoic.
Abbink, Ahmadi, Al-Suwaidi, Algeo, Algeo, Algeo, Anbar, Angela L. Coe, Anthony S. Cohen, Archer, Arnold, Barling, Bertrand, Chambers, Christopher R. Pearce, Cohen, Cohen, Cox, Crusius, Crusius, Demaison, Dunn, Emerson, Glennie, Gradstein, Hallam, Herbin, Hesselbo, Hesselbo, Huang, Jenkyns, Jenkyns, Jenkyns, Jenkyns, Kemp, Lallier-Vergès, Lallier-Vergès, Lees, Lees, Ling, Matthews, McArthur, McManus, Miller, Morford, Morgans-Bell, Neubert, Oschmann, Oschmann, Padden, Pearce, Pearce, Pearson, Piper, Poulson, Pálfy, Raiswell, Raiswell, Saelen, Schouten, Siebert, Siebert, Sinninghe Damsté, Taylor, Tossell, Tribovillard, Tribovillard, Tribovillard, Tribovillard, Tyson, Tyson, Tyson, van Dongen, van Kaam-Peters, van Kaam-Peters, Weedon, Weedon, Weissert, Wignall, Wignall, Wignall, Ziegler   +81 more
core   +1 more source

Fluctuations of sea-water chemistry during Gargasian (Middle Aptian) time. Data from trace-element content (Mg, Sr, Mn, Fe) in hemipelagic carbonates from La Marcouline Quarry (Cassis, SE France)

Carnets de Géologie, 2007
In the Lower Aptian historical stratotype area (Cassis-La Bédoule, SE France), a geochemical study of the Gargasian (Middle Aptian) marl-limestone alternations of the La Marcouline quarry complements data already obtained from Bedoulian (Early Aptian ...
TRONCHETTI Guy, EMMANUEL Laurent, BELTRAN Catherine, MOULLADE Michel, RENARD Maurice, RAFELIS Marc de   +5 more
doaj  

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

High‐Dimensional Chemostratigraphy of Pelagic Clay in the Western North Pacific Ocean Revealed via an Unsupervised Clustering Approach [PDF]

, 2023
Kazutaka Yasukawa, Erika Tanaka, Takashi Miyazaki, Bogdan Stefanov Vaglarov, Qing Chang, Kentaro Nakamura, Junichiro Ohta, Koichiro Fujinaga, Hikaru Iwamori, Yasuhiro Kato   +9 more
openalex   +1 more source

Geochemical and Seismic Constraints on the Role of Mud Diapirs in Petroleum Migration and Accumulation in the Recôncavo Basin, NE Brazil

Journal of Petroleum Geology, Volume 49, Issue 2, Page 433-447, April 2026.
ABSTRACT In the Recôncavo Basin, Northeast of Brazil, mud diapirs have been reported for decades, but their role within the basin's petroleum system remains poorly constrained. Here, we combine 2D seismic interpretation, field observations, and organic geochemical analyses of rocks and oil seeps to investigate the relationship between diapirism and ...
Cora Mattos, Egberto Pereira, Lucas Pinto Heckert Bastos, René Rodrigues   +3 more
wiley   +1 more source