Results 41 to 50 of about 46,249 (173)

Evidence From Microscopy and U–Pb Geochronology as a Clue to the Influence of the Cretaceous Magmatism in the Diagenesis of Pre‐Salt Carbonate Reservoirs in the Santos Basin (Brazil)

Geological Journal, EarlyView.
Carbonates from Santos Basin revealed U–Pb ages correlated with basalt ages (A), suggesting that they were formed during magmatic events. These events placed hot CO2 in the reservoir, which, when mixed with carbonate‐rich cold water (B), led to thermal convection, enabling the formation of the U contained in the carbonates.
Marco António Ruivo de Castro e Brito, Cristiano Leite Sombra, Davy Raeder Brandão, Cleverson Guizan Silva, Sidney Luiz de Matos Mello, Eugênio Vaz dos Santos Neto, Rui Jorge Fernandes Baptista, Ramsés Capilla, Luiz Antônio Pierantoni Gambôa   +8 more
wiley   +1 more source

Monitoring lava lake fluctuations and crater refilling with continuous laser rangefinders

Journal of Applied Volcanology
The U.S. Geological Survey’s Hawaiian Volcano Observatory (HVO) has developed a new method to continuously monitor lava lake elevations. Since 2018, HVO has stationed a laser rangefinder on Kīlauea’s caldera rim.
E. F. Younger, W. Tollett, M. R. Patrick
doaj   +1 more source

Tectonics, volcanism, landscape structure and human evolution in the African Rift [PDF]

, 2000
Tectonic movements and volcanism in the African Rift have usually been considered of relevance to human evolution only at very large geographical and chronological scales, principally in relation to longterm topographic and climatic variation at the ...
Bailey, G., King, G., Manighetti, I.
core  

Controlling banana bunchy top disease in Benin: Crop protection strategies with socio‐economic perspectives

PLANTS, PEOPLE, PLANET, EarlyView.
Banana and plantain are vital for food security and income in West Africa, yet banana bunchy top virus (BBTV) threatens production. This study combined remote sensing, field surveys, modelling and socio‐economic analysis to assess BBTV spread and control strategies in Benin.
Renata Retkute, Martine Zandjanakou‐Tachin, Bonaventure Aman Omondi, Ulrich Roland Agoi, Yaovi Marc Vodounou, Hermine Akofodji, Evrard Akpla, Laurence Dossou, Emiline Médénou, Alban Etchiha, Alphonse Attadéou, P. Lava Kumar, John E. Thomas, Christopher A. Gilligan   +13 more
wiley   +1 more source

Corticosteroid Use and Risk of Adverse Events in Metastatic Hormone‐Sensitive Prostate Cancer

The Prostate, EarlyView.
ABSTRACT Background Among the approved therapies for metastatic hormone‐sensitive prostate cancer (mHSPC), abiraterone and docetaxel are administered concomitantly with corticosteroids. This study evaluated the association between corticosteroid use and risk of adverse events among patients with mHSPC. Methods We conducted an observational cohort study
Umang Swami, Qiujun Shao, Tamuno Alfred, Maelys Touya, Frank Cao, Pinal Kamdar, Jasmina Ivanova, Johanna Celli, David Nimke   +8 more
wiley   +1 more source

Lava Lake Spattering Drives Seismic Tremor During the Geldingadalir 2021 Eruption, Iceland

Geochemistry, Geophysics, Geosystems
Volcanic eruptions generate a continuous ground motion that is commonly referred to as tremor. Although tremor is used worldwide for real‐time monitoring of volcanoes, the mechanisms involved are generally poorly understood.
Alea Joachim, Eva P. S. Eibl, Daniel Müller, Thomas R. Walter, Tom Winder, Nicholas Rawlinson   +5 more
doaj   +1 more source

Sensitivity to lunar cycles prior to the 2007 eruption of Ruapehu volcano [PDF]

, 2017
A long-standing question in Earth Science is the extent to which seismic and volcanic activity can be regulated by tidal stresses, a repeatable and predictable external excitation induced by the Moon-Sun gravitational force.
Caudron, Corentin, Girona, Társilo, Huber, Christian   +2 more
core   +2 more sources

Distance sampling: comparing walked transects and road transects for rock ptarmigan densities and population trends

Wildlife Biology, EarlyView.
We compared population trends for rock ptarmigan Lagopus muta densities (2003‒2019) derived from walked transects and driven road transects in Mosfellsheiði and Slétta in southwest and northeast Iceland, respectively. The walked transects were laid out according to a random rule.
Matteo Ferrarini, Ólafur K. Nielsen
wiley   +1 more source

Local Infrasound Monitoring of Lava Eruptions at Nyiragongo Volcano (D.R. Congo) Using Urban and Near‐Source Stations

Geophysical Research Letters, 2023
During eruptions, volcanoes produce air‐pressure waves inaudible for the human ear called infrasound, which are very helpful for detecting early signs of magma at the surface.
Julien Barrière, Adrien Oth, Nicolas d’Oreye, Josué Subira, Delphine Smittarello, Hugues Brenot, Nicolas Theys, Benoît Smets   +7 more
doaj   +1 more source

A global synthesis of lava lake dynamics

Journal of Volcanology and Geothermal Research, 2019
Abstract Active lava lakes represent a variety of open-vent volcanism in which a sizable body of lava accumulates at the top of the magma column, constrained by the vent and/or crater geometry. The longevity of lava lakes reflects a balancing of cooling and outgassing occurring at the surface and input of hot and gas-rich magma from below.
Einat Lev, Philipp Ruprecht, Clive Oppenheimer, Nial Peters, Matt Patrick, Pedro A. Hernández, Letizia Spampinato, Jeff Marlow   +7 more
openaire   +2 more sources