Journal ArticleDOI
Gas geochemistry of hydrothermal fluids of the S. Miguel and Terceira Islands, Azores
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TLDR
In this article, a complete dataset of the chemical and isotopic compositions of fumarolic fluids collected on the S. Miguel (Fogo and Furnas volcanoes) and Terceira (Pico Alto volcano) Islands is presented, to provide a comprehensive picture of the thermodynamic conditions of the hydrothermal systems on these two islands, and to give new insight into the origins of these fluids, for a better understanding of the geodynamic context of the Azores archipelago.About:
This article is published in Geochimica et Cosmochimica Acta.The article was published on 2015-11-01. It has received 42 citations till now.read more
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Journal ArticleDOI
3D electrical conductivity tomography of volcanoes
A. Soueid Ahmed,A. Soueid Ahmed,André Revil,André Revil,S. Byrdina,S. Byrdina,A. Coperey,A. Coperey,Lydie-Sarah Gailler,Niels Grobbe,Fátima Viveiros,Catarina Silva,Damien Jougnot,Ahmad Ghorbani,Colin Hogg,Duygu Kiyan,Volker Rath,Michael J. Heap,Hendra Grandis,Hanik Humaida +19 more
TL;DR: In this article, a large-scale inversion code named ECT-3D was developed to handle complex topographical effects like those encountered in volcanic areas, which can reconstruct the electrical conductivity field of an edifice marked by a strong topography and strong variations in the resistivity distribution.
Journal ArticleDOI
Estimation of the CO2 flux from Furnas volcanic Lake (São Miguel, Azores)
TL;DR: In this paper, a study on diffuse CO 2 degassing was conducted at Furnas lake (Sao Miguel island, Azores) in order to estimate the total CO 2 output and identify anomalous degassing areas over the lake.
Journal ArticleDOI
Geochemical and isotopic characteristics of fluids in the Niutuozhen geothermal field, North China
TL;DR: In this article, chemical and isotopic analyses were carried out on 14 samples of the geothermal fluids discharged from Neogene Minghuazhen (Nm), Guantao (Ng), and Jixianian Wumishan (Jxw) formations.
Journal ArticleDOI
Abiogenesis not required to explain the origin of volcanic-hydrothermal hydrocarbons
Jens Fiebig,Andri Stefánsson,Andrea Ricci,Franco Tassi,Fátima Viveiros,S. Silva,Taryn Lopez,C. Schreiber,Sven Hofmann,Bruce W. Mountain +9 more
TL;DR: Fiebig et al. as discussed by the authors presented the first global investigation of the carbon and hydrogen isotopic compositions of n-alkanes in volcanic-hydrothermal fluids hosted by basaltic, andesitic, trachytic and rhyolitic rocks.
Journal ArticleDOI
Automatic Filtering of Soil CO2 Flux Data. Different Statistical Approaches Applied to Long Time Series
TL;DR: In this paper, different statistical approaches applied to the long time series recorded in this degassing area, focusing on the application of stepwise multivariate regression analysis, wavelets and Fast Fourier Transform to understand the CO2 flux variations and to detect eventual anomalous periods that can represent deep changes in the volcano feeding reservoirs.
References
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Journal ArticleDOI
Isotopic Variations in Meteoric Waters
TL;DR: The relationship between deuterium and oxygen-18 concentrations in natural meteoric waters from many parts of the world has been determined with a mass spectrometer and shows a linear correlation over the entire range for waters which have not undergone excessive evaporation.
Journal ArticleDOI
Geothermal solute equilibria. Derivation of Na-K-Mg-Ca geoindicators
TL;DR: In this paper, the relative Na, K, Mg and Ca contents of thermal waters in full equilibrium with a thermodynamically stable mineral system derived through isochemical recrystallization of an average crustal rock are, at a given temperature and salinity, uniquely fixed.
Book
Noble Gas Geochemistry
Minoru Ozima,Frank A. Podosek +1 more
TL;DR: The Earth References Index as discussed by the authors is a collection of articles about the physical chemistry and cosmochemistry of the Earth that can be found in the Google Docs directory. But they are not related to this paper.
Journal ArticleDOI
A redetermination of the isotopic abundances of atmospheric Ar
Jee-Yon Lee,Jee-Yon Lee,Jee-Yon Lee,Kurt Marti,Jeffrey P. Severinghaus,Kenji Kawamura,Kenji Kawamura,Hee-Soo Yoo,Jin Bok Lee,Jin Seog Kim +9 more
TL;DR: In this article, the isotopic abundances of atmospheric Ar were determined using a dynamically operated isotope ratio mass spectrometer with minor modifications and special gas handling techniques to avoid fractionation.