Results 1 to 10 of about 32,530 (245)

Metal Catalysis Acting on Nitriles in Early Earth Hydrothermal Systems

Life, 2023
Hydrothermal systems are areas in which heated fluids and organic molecules rush through basaltic material rich in metals and minerals. By studying malononitrile and acetonitrile, we examine the effects of metal and mineral nanoparticles on nitrile ...
Miranda Sturtz, Christopher House
doaj   +2 more sources

Bacterial Diversity and Biogeochemistry of Two Marine Shallow-Water Hydrothermal Systems off Dominica (Lesser Antilles) [PDF]

Frontiers in Microbiology, 2017
Shallow-water hydrothermal systems represent extreme environments with unique biogeochemistry and high biological productivity, at which autotrophic microorganisms use both light and chemical energy for the production of biomass. Microbial communities of
Petra Pop Ristova, Thomas Pichler, Michael W. Friedrich, Solveig I. Bühring   +3 more
doaj   +2 more sources

Comparative Metagenomics Highlight a Widespread Pathway Involved in Catabolism of Phosphonates in Marine and Terrestrial Serpentinizing Ecosystems

mSystems, 2022
Serpentinizing hydrothermal systems result from water circulating into the subsurface and interacting with mantle-derived rocks notably near mid-ocean ridges or continental ophiolites.
Eléonore Frouin, Aurélien Lecoeuvre, Fabrice Armougom, Matthew O. Schrenk, Gaël Erauso   +4 more
doaj   +1 more source

Stability of DL-Glyceraldehyde under Simulated Hydrothermal Conditions: Synthesis of Sugar-like Compounds in an Iron(III)-Oxide-Hydroxide-Rich Environment under Acidic Conditions

Life, 2022
Researchers have suggested that the condensation of low-molecular-weight aldehydes under basic conditions (e.g., pH > 11) is the prebiotic reaction responsible for the abiotic formation of carbohydrates.
Claudio Alejandro Fuentes-Carreón, Jorge Armando Cruz-Castañeda, Eva Mateo-Martí, Alicia Negrón-Mendoza   +3 more
doaj   +1 more source

Listvenites: new insights of a hydrothermal system fossilized in Cerro Matoso peridotites, Montelíbano, Córdoba Department, Colombia

Boletín Geológico, 2020
The products of metasomatic alteration (e.g., carbonation) of peridotites are called listvenites. Based on a description of the outcrops in the laterite deposit at Cerro Matoso located in the NW of Colombia, the mineralogical composition confirmed by ...
Andrés Castrillón, Javier Guerrero
doaj   +1 more source

The Basse-Terre Island of Guadeloupe (Eastern Caribbean, France) and Its Volcanic-Hydrothermal Geodiversity: A Case Study of Challenges, Perspectives, and New Paradigms for Resilience and Sustainability on Volcanic Islands

Geosciences, 2021
The volcanic-hydrothermal geo-diversity of the Basse-Terre Island of Guadeloupe archipelago (Eastern Caribbean, France) is a major asset of the Caribbean bio-geoheritage.
Roberto Moretti, Séverine Moune, David Jessop, Chagnon Glynn, Vincent Robert, Sébastien Deroussi   +5 more
doaj   +1 more source

Recent high-resolution mapping of Guaymas hydrothermal fields (Southern Trough)

BSGF - Earth Sciences Bulletin, 2018
Insights into the factors controlling fluid circulation through the crust and the nature of fluid venting at the seafloor are first steps in understanding their effect on ocean properties and climate change.
Ondréas Hélène, Scalabrin Carla, Fouquet Yves, Godfroy Anne   +3 more
doaj   +1 more source

Novel barite chimneys at the Loki´s Castle Vent Field shed light on key factors shaping microbial communities and functions in hydrothermal systems

Frontiers in Microbiology, 2016
In order to fully understand the cycling of elements in hydrothermal systems it is critical to understand intra-field variations in geochemical and microbiological processes in both focused, high-temperature and diffuse, low-temperature areas.
Ida Helene eSteen, Hakon eDahle, Runar eStokke, Irene eRoalkvam, Frida-Lise eDaae, Hans-Tore eRapp, Rolf-Birger ePedersen, Ingunn Hindenes Thorseth   +7 more
doaj   +1 more source

Cation-Exchange Capacity Distribution within Hydrothermal Systems and Its Relation to the Alteration Mineralogy and Electrical Resistivity

Energies, 2020
Cation-exchange capacity (CEC) measurements are widely used to quantify the smectite content in altered rocks. Within this study, we measure the CEC of drill cuttings in four wells from three different high-temperature geothermal areas in Iceland.
Tobias Björn Weisenberger, Heimir Ingimarsson, Gylfi Páll Hersir, Ólafur G. Flóvenz   +3 more
doaj   +1 more source

Feasibility to Use Continuous Magnetotelluric Observations for Monitoring Hydrothermal Activity. Numerical Modeling Applied to Campi Flegrei Volcanic System (Southern Italy)

Frontiers in Earth Science, 2019
The magnetotelluric (MT) method is useful for monitoring geophysical processes because of a large dynamic depth range. In this paper, a feasibility study of employing continuous MT observations to monitor hydrothermal systems for both volcanic hazard ...
Rolando Carbonari, Rosa Di Maio, Ester Piegari   +2 more
doaj   +1 more source