Results 61 to 70 of about 3,332 (193)

The Uplift of Armorica and the Bretonian Movements of the Variscan Orogeny‐New Insights From Detrital Zircons in the Early Carboniferous Terrigenous Rocks of the Laval Basin (Armorican Massif, France)

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 6, June 2025.
Abstract In the French Armorican Massif, the Bretonian phase of the Variscan orogeny has been defined by the Late Devonian (Famennian‐Frasnian) erosion gap, and the Early Carboniferous (Tournaisian) syntectonic terrigenous deposits of the l’Huisserie formation in the Laval basin in the Central‐North Armorican Domain, ascribed to the Armorica ...
Wei Lin, Michel Faure, Lingtong Meng
wiley   +1 more source

Classification and Flooding Potential Assessment of Subbasins of a Tropical River Using Cluster Algorithms

Journal of Flood Risk Management, Volume 18, Issue 2, June 2025.
ABSTRACT Three clustering algorithms, K‐means clustering analysis (KCA), fuzzy cluster analysis (FCA), and density‐based spatial clustering of applications with noise (DBSCAN), are applied to classify the 13 subbasins of the Mahe River, southwest India, based on 13 morphometric parameters of each. Suitable validation indices, such as Davies–Bouldin and
Ajith G. Nair, R. Kiran
wiley   +1 more source

Vigor and viability of wheat seeds treated with zinc [PDF]

Biotemas, 2012
Zinc has been used in the formulation of products named phytostimulants, acting on cell elongation and lateral root formation. Thus, this paper aimed to evaluate the effect of doses of zinc applied in seed treatment on germination and vigor of wheat ...
Silvana Ohse, Jonathan Gomes Cubis, Bráulio Luciano Alves Rezende, Marluce Gonçalves Cortez, Rosana Fernandez Otto   +4 more
doaj  

Composição Química da Turmalina de Turmalinitos Estratiformes da Mina de Passagem de Mariana, Sudeste do Quadrilátero Ferrífero (MG)

Geologia USP. Série Científica, 2009
A mina subterrânea de Passagem de Mariana é uma das minas de ouro mais antigas do Brasil. O ouro associa-se a turmalinitos estratiformes e veios e brechas de quartzo e carbonato com turmalina.
Gianna Maria Garda, Johann Hans Daniel Schorscher, Paulo Beljavskis, Marcos de Souza Mansueto, Margareth Sugano Navarro, Andrezza Alves Mota   +5 more
doaj   +1 more source

Deep and Clustered Microseismicity at the Edge of Southern New Zealand's Transpressive Plate Boundary

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 5, May 2025.
Abstract Deep (>∼ ${ >} \sim $20 km) crustal seismicity is typically associated with cold Precambrian lithosphere. However, previous studies have reported that the depth above which 90% of seismicity occurs (D90) in the Southland region of New Zealand is 30–35 km, even though it is situated in relatively young Mesozoic crust at the eastern edge of the ...
Jack N. Williams, Donna Eberhart‐Phillips, Sandra Bourguignon, Mark W. Stirling, Will Oliver   +4 more
wiley   +1 more source

Transport and Depositional Processes of Neogene Pumice Fragments in a Distal Fluvial System of the Northern Patagonian Foreland (Argentina)

Basin Research, Volume 37, Issue 3, May/June 2025.
In this work we analyse the origin, transport, and deposition processes of pumice fragments up to 30 cm in size, deposited in the Northern Patagonian Foreland more than 200 km from the Andean volcanic arc. ABSTRACT There are numerous studies analysing volcaniclastic supply to continental environments in distal areas from source volcanoes.
Lucas Peñacorada, Ricardo Gómez, Maisa Tunik, Silvio Casadio   +3 more
wiley   +1 more source

Idade U-Pb (LA-ICPMS) em zircão e isótopos de Nd para granitoides do Complexo Tamboril-Santa Quitéria, Domínio Ceará Central: implicações para magmatismo neoproterozoico sin-colisional no domínio norte da Província Borborema

Geologia USP. Série Científica, 2013
O Complexo Tamboril Santa-Quitéria (CTSQ) é uma das maiores manifestações plutônicas do Neoproterozoico na porção norte da Província Borborema (NE Brasil).
Felipe Grandjean da Costa, Carlos Eduardo Ganade de Araújo, Wagner da Silva Amaral, Antonio Maurilio Vasconcelos, Joseneusa Brilhante Rodrigues   +4 more
doaj  

Estudo de quartzos em catodoluminescência

, 2010
The application of cathodoluminescence microscopy to the study of quartz from different sources aims to show the importance of this technique to distinguish different generations of quartz, and to identify geochemical signatures with different origins.
H. Couto, A. Lourenço, F. Borges
openaire   +1 more source

Sedimentology and reservoir characterisation of Lower Jurassic clastic sedimentary rocks, Salt and Trans Indus Ranges, Pakistan: Evidence from petrography, scanning electron microscopy and petrophysics

The Depositional Record, Volume 11, Issue 2, Page 698-717, April 2025.
In this study, sandstones of the Lower Jurassic Datta Formation (DF‐LJ) in the Salt and Trans‐Indus Ranges are investigated regarding composition, diagenesis, provenance and reservoir properties using petrography, scanning electron microscopy (SEM) and petrophysical analysis.
Salman Ahmed Khattak, Nasar Khan, Waseem Khan, S. Sahaya Jude Dhas, George Kontakiotis, Ihtisham Islam, Hammad Tariq Janjuhah, Assimina Antonarakou   +7 more
wiley   +1 more source

Mineralogia de um argissolo vermelho-amarelo eutrófico e de um planossolo háplico eutrófico solódico numa toposseqüência de gnaisse no Sertão Central do Ceará

Revista Brasileira de Ciência do Solo, 2002
Propriedades morfológicas, físicas e químicas, mineralogia e transformações mineralógicas foram investigadas num Argissolo Vermelho - Amarelo eutrófico (bem drenado) e num Planossolo Háplico eutrófico solódico (imperfeitamente drenado), originados de ...
F. O. B. Mota, J. B. Oliveira, H. Gebhardt   +2 more
doaj   +1 more source