Results 101 to 110 of about 16,262 (232)

Crustal Evolution of the Himalaya since Paleoproterozoic

, 2022
Understanding the crustal evolution of any orogen is essential in delineating the nomenclature of litho units, stratigraphic growth, tectonic evolution, and, most importantly, deciphering the paleogeography of the Earth. In this context, the Himalayas, one of the youngest continent-continent collisional orogen on the Earth, has played a key role in ...
Vikas, Adlakha,, Kalachand, Sain,
openaire   +2 more sources

Introduction to the Special Collection Through the Arctic Lens: Progress in Understanding the Arctic Ocean, Margins, and Landmasses

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 4, April 2026.
Abstract The 9th International Conference on Arctic Margins, held in Ottawa, Canada, from 13–15 June 2022, convened under the theme Through the Arctic Lens, drawing renewed attention to the scientific, logistical, and environmental challenges inherent to geoscience research in the Arctic. This Special Collection presents a suite of studies spanning the
Marie‐Claude Williamson
wiley   +1 more source

Rapid oxygenation of Earths atmosphere 2.33 billion years ago [PDF]

, 2016
Molecular oxygen (O[subscript 2]) is, and has been, a primary driver of biological evolution and shapes the contemporary landscape of Earth’s biogeochemical cycles.
Beukes, Nicolas J., Luo, Genming, Ono, Shuhei, Summons, Roger E., Wang, David T., Xie, Shucheng   +5 more
core   +1 more source

High pCO2-induced exopolysaccharide-rich ballasted aggregates of planktonic cyanobacteria could explain Paleoproterozoic carbon burial

Nature Communications, 2018
A Paleoproterozoic carbon isotope anomaly is likely linked to burial of oceanic cyanobacteria, but it is not clear how burial occurred. Here, the authors find that, under Paleoproterozoic pCO2 conditions, planktonic cyanobacteria increase ...
Nina A. Kamennaya, Marcin Zemla, Laura Mahoney, Liang Chen, Elizabeth Holman, Hoi-Ying Holman, Manfred Auer, Caroline M. Ajo-Franklin, Christer Jansson   +8 more
doaj   +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

Manganese-oxidizing photosynthesis before the rise of cyanobacteria [PDF]

, 2013
The emergence of oxygen-producing (oxygenic) photosynthesis fundamentally transformed our planet; however, the processes that led to the evolution of biological water splitting have remained largely unknown.
Allen, Anbar, Bekker, Bekker, Blankenship, Brocks, Buchel, Dismukes, Ettwig, Farquhar, Farquhar, Fischer, Guo, J. E. Johnson, J. L. Kirschvink, K. Thomas, Kirschvink, Klein, Konhauser, Mayhew, McEvoy, Miyano, Olson, Rasmussen, S. M. Webb, S. Ono, Schissel, Tsikos, Umena, W. W. Fischer, Williamson, Xiong   +31 more
core   +2 more sources

The making of pure quartzose sand in continental interiors: Paraná River (Brazil and Argentina)

Sedimentology, Volume 73, Issue 3, Page 802-837, April 2026.
ABSTRACT As part of a comprehensive project on sedimentary processes in South America, this study focuses on sediment generation in the intracratonic Paraná Basin and monitors the evolution of sand composition along the Paraná River from central Brazil to the Río de la Plata estuary in Argentina.
Eduardo Garzanti, Marta Barbarano, Mara Limonta, Guido Pastore, Pieter Vermeesch, Giovanni Vezzoli   +5 more
wiley   +1 more source

Exploring the Gravimetric and Geochronological Links in Ancient Terranes of the São Francisco Craton and Borborema Province, NE‐Brazil

Terra Nova, Volume 38, Issue 2, Page 77-86, April 2026.
ABSTRACT Deep crustal fragments and structural lineaments identified through satellite gravity data provide evidence for the extension of the reworked ancient basement of the Central African Block into the northern São Francisco Craton and southern Borborema Province.
Douglas Teixeira Martins, Wagner da Silva Amaral, Felipe Holanda dos Santos, Evilarde Uchôa Filho   +3 more
wiley   +1 more source

Extreme sensitivity in Snowball Earth formation to mountains on PaleoProterozoic supercontinents [PDF]

, 2019
During the PaleoProterozoic 2.45 to 2.2 billion years ago, several glaciations may have produced Snowball Earths. These glacial cycles occurred during large environmental change when atmospheric oxygen was increasing, a supercontinent was assembled from ...
A Bekker, A Voigt, AA Pavlov, AD Rooney, AJ Kaufman, AP Coleman, B Rasmussen, BP Briegleb, CJ Poulsen, DA Evans, DO Gough, G Feulner, GM Young, GM Young, H Tang, IN Bindeman, J Goodman, JF Kasting, JF Kasting, JP Lewis, K Zahnle, LB Aspler, LJ Pesonen, ME Barley, N Eyles, NV Lubnina, PF Hoffman, PF Hoffman, R Jacob, R Rye, RE Kopp, S Schröder, SP Mohanty, TW Lyons, VA Melezhik, W Bleeker, Y Liu, Y Teitler   +37 more
core   +2 more sources

Near‐Synchronous Cambrian Evolution of the Transbrasiliano‐Kandi‐4°50′ Shear Zone in South America and Africa

Terra Nova, Volume 38, Issue 2, Page 97-105, April 2026.
ABSTRACT The Transbrasiliano‐Kandi‐4°50′ (TK4) shear zone in western Gondwana crosscuts South America and NW Africa for at least 6000 km. Despite its impressive size, the timing of the main episode of dextral ductile shearing is uncertain. We present detailed in situ multi‐mineral geochronology of mylonites from both Brazil and Algeria supporting that ...
F. A. Caxito, B. V. Ribeiro, F. Alkmim, A. Deramchi, C. L. Kirkland   +4 more
wiley   +1 more source