Results 71 to 80 of about 34,869 (280)

Petrographic and mineralogical characteristics of diagenetic overprinting in Neoproterozoic diamictites from Murchisonfjorden, Nordaustlandet, Svalbard

Mineralogia
The diagenetic processes exhibited by the Neoproterozoic diamictites from Murchisonfjorden (Nordaustlandet, NE Svalbard) are presented. Diamictite samples from the Cryogene Polarisbreen Group - the Petrovbreen Member of the Elbobreen Formation and the ...
Bal Szczepan, Nejbert Krzysztof, Michalski Krzysztof, Domańska-Siuda Justyna, Manby Geoffrey, Hołda-Michalska Aleksandra, Sláma Jiři   +6 more
doaj   +1 more source

Relics of ophiolite-bearing accretionary wedges in NE Brazil and NW Africa: Connecting threads of western Gondwana´s ocean during Neoproterozoic times

Geosystems and Geoenvironment, 2023
Neoproterozoic breakup of Rodinia resulted in the formation of several oceanic realms between dispersing cratons, which were later consumed during the assembly of Gondwana. In its western portion, the interior orogenic belts of Gondwana formed during the
Lauro Cézar M. de Lira Santos, Fabrício A. Caxito, Merlain H. Bouyo, Sonia Ouadahi, Kawther Araïbia, Geysson A. Lages, Glenda L. Santos, João Paulo A. Pitombeira, Peter A. Cawood   +8 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

Lithostratigraphy of the Portfjeld Group (Ediacaran – lowermost Cambrian) of North Greenland

GEUS Bulletin
The Portfjeld Formation, as originally defined, is the lowermost lithostratigraphic unit of the mainly Lower Palaeozoic Franklinian Basin in southern Peary Land, central North Greenland.
Jon R. Ineson, John S. Peel, Sebastian Willman, Elias J. Rugen, Martin Sønderholm, Peter Frykman   +5 more
doaj   +1 more source

MAGMATIC SOURCES OF THE EVOLVING CONTINENTAL TECTONOSPHERE IN INDIA: GENERATION OF ALKALINE IGNEOUS COMPLEXES WITH CARBONATITES IN THE SAMALPATTI (SOUTHERN INDIA) AND AMBA DONGAR (WESTERN INDIA) MASSIFS

Геодинамика и тектонофизика
Neoproterozoic Samalpatti and Cretaceous-Paleogene Amba Dongar massifs are considered to evaluate the change of sources of carbonatite magmatism in evolving tectonosphere of India. The inherited character of Ba and Sr distribution components is traced in
S. V. Rasskazov, T. A. Yasnygina, K. R. Hari, I. S. Chuvashova, E. V. Saranina   +4 more
doaj   +1 more source

Biological feedbacks as cause and demise of the Neoproterozoic icehouse: astrobiological prospects for faster evolution and importance of cold conditions. [PDF]

PLoS ONE, 2007
Several severe glaciations occurred during the Neoproterozoic eon, and especially near its end in the Cryogenian period (630-850 Ma). While the glacial periods themselves were probably related to the continental positions being appropriate for glaciation,
Pekka Janhunen, Hermanni Kaartokallio, Ilona Oksanen, Kirsi Lehto, Harry Lehto   +4 more
doaj   +1 more source

Tectonic overview of the West Gondwana margin [PDF]

, 2008
The oceanic southern margin of Gondwana, from southern South America through South Africa, West Antarctica, New Zealand (in its pre break-up position), and Victoria Land to Eastern Australia is one of the longest and longest-lived active continental ...
Pankhurst, Robert J., Vaughan, Alan P.M.
core   +1 more source

Comprehensive evaluation of Neoproterozoic source rocks formation

Georesursy
Based on comprehensive analysis of geological, geochemical, and paleotectonic settings, the conditions for the formation of Neoproterozoic oil and gas source rocks of the Earth are analyzed. A brief review of oil and gas fields in Eastern Siberia, China,
K. A. Sitar, B. V. Georgievskiy, M. A. Bolshakova, R. S. Sautkin   +3 more
doaj   +1 more source

Sedimentary evolution of Neoproterozoic rift basin in northern Tarim

Petroleum Research, 2017
Based on the outcrop, drilling and seismic data, the sedimentary successions, evolution and hydrocarbon exploration potential of the Neoproterozoic rift basin in the northern Tarim were firstly analyzed.
Lin Wu, Shuwei Guan, Rong Ren, Chunyu Zhang   +3 more
doaj   +1 more source

The Fuchuan Ophiolite in South China: Evidence for Modern‐Style Plate Tectonics During Rodinia Breakup

Geochemistry, Geophysics, Geosystems, 2021
Subduction initiation processes, such as those evidenced in the Izu‐Bonin‐Mariana (IBM) forearc crust are a key feature of modern‐style plate tectonics.
Si‐Fang Huang, Wei Wang, Andrew C. Kerr, Jun‐Hong Zhao, Qing Xiong, Jian Wang   +5 more
doaj   +1 more source