scholarly journals Strontium isotopes and water-rock interaction of the Agrokipia 'B' stockwork deposit in the Troodos ophiolite, Cyprus: a fossil subseafloor ore body.

1990 ◽  
Vol 24 (6) ◽  
pp. 349-356 ◽  
Author(s):  
Hodaka Kawahata ◽  
Steven D. Scott
Keyword(s):  
Strontium Isotopes ◽  
Rock Interaction ◽  
Troodos Ophiolite ◽  
Ore Body ◽  
Water Rock Interaction

Geochemical Analogue Study in the Krunkelbach Mine, Menzenschwand, Southern Germany: Geology and Water-Rock Interaction

1988 ◽  
Vol 127 ◽  
Author(s):  
Beda A. Hofmann
Keyword(s):  
Pyrite Oxidation ◽  
Iron Hydroxides ◽  
Iron Sulfides ◽  
Rock Interaction ◽  
Southern Germany ◽  
Analogue Study ◽  
Ore Body ◽  
Vein Type ◽  
Sulphur Species ◽  
Water Rock Interaction

ABSTRACTThe mineralogy, geochemistry and hydrochemistry of water-bearing zones in the Krunkelbach vein-type U deposit, Southern Germany, have been investigated. The U ore body is aligned parallel and a few metres apart from a major waterbearing structure. Oxidation of pitchblende and of iron sulfides has been extensive down to a depth of at least 240 m. U retardation is due to neoformation of U(VI)-phases and to fixation on iron hydroxides, gorceixite and clay minerals. Under the prevailing conditions, Ra is fixed in baryte, but Ba and probably Ra were more mobile during earlier stages of the oxidation event, probably due to the presence of intermediate valence sulphur species as a product of pyrite oxidation.

87SR/86SR, δ18O AND NOBLE GASES AS TRACERS OF WATER-ROCK INTERACTION IN THE THEISTAREYKIR GEOTHERMAL FIELD

2020 ◽  
Author(s):  
Marie Haut-Labourdette ◽  
◽  
Daniele Pinti ◽  
André Poirier ◽  
Marion Saby ◽  
...  
Keyword(s):  
Noble Gases ◽  
Geothermal Field ◽  
Rock Interaction ◽  
Water Rock Interaction

scholarly journals Geochemical and isotopic evidence of groundwater salinization processes in the Essaouira region, north-west coast, Morocco

2021 ◽  
Vol 3 (7) ◽  
Author(s):  
Otman EL Mountassir ◽  
Mohammed Bahir ◽  
Driss Ouazar ◽  
Abdelghani Chehbouni ◽  
Paula M. Carreira
Keyword(s):  
Groundwater Recharge ◽  
West Coast ◽  
Exchange Process ◽  
Environmental Isotopes ◽  
Annual Rainfall ◽  
Groundwater Salinization ◽  
Rock Interaction ◽  
North West ◽  
The North ◽  
Water Rock Interaction

AbstractThe city of Essaouira is located along the north-west coast of Morocco, where groundwater is the main source of drinking, domestic and agricultural water. In recent decades, the salinity of groundwater has increased, which is why geochemical techniques and environmental isotopes have been used to determine the main sources of groundwater recharge and salinization. The hydrochemical study shows that for the years 1995, 2007, 2016 and 2019, the chemical composition of groundwater in the study area consists of HCO3–Ca–Mg, Cl–Ca–Mg, SO4–Ca and Cl–Na chemical facies. The results show that from 1995 to 2019, electrical conductivity increased and that could be explained by a decrease in annual rainfall in relation to climate change and water–rock interaction processes. Geochemical and environmental isotope data show that the main geochemical mechanisms controlling the hydrochemical evolution of groundwater in the Cenomanian–Turonian aquifer are the water–rock interaction and the cation exchange process. The diagram of δ2H = 8 * δ18O + 10 shows that the isotopic contents are close or above to the Global Meteoric Water Line, which suggests that the aquifer is recharged by precipitation of Atlantic origin. In conclusion, groundwater withdrawal should be well controlled to prevent groundwater salinization and further intrusion of seawater due to the lack of annual groundwater recharge in the Essaouira region.

scholarly journals Water–rock interaction and the concentrations of major, trace, and rare earth elements in hydrocarbon-associated produced waters of the United States

2021 ◽  
Author(s):  
Carleton R. Bern ◽  
Justin E. Birdwell ◽  
Aaron M. Jubb
Keyword(s):  
United States ◽  
Rare Earth ◽  
Rare Earth Elements ◽  
Water Chemistry ◽  
Produced Water ◽  
The United States ◽  
Rock Interaction ◽  
Produced Waters ◽  
Water Rock Interaction

Comparisons of hydrocarbon-produced waters from multiple basins and experiments using multiple shales illustrate water–rock interaction influence on produced water chemistry.

Modeling water-rock interaction in the surficial environment: The role of precursors, nucleation, and Ostwald ripening

1990 ◽  
Vol 84 (1-4) ◽  
pp. 322-325 ◽  
Author(s):  
C.I. Steefel ◽  
P. Van Capellen ◽  
K.L Nagy ◽  
A.C. Lasaga
Keyword(s):  
Ostwald Ripening ◽  
Rock Interaction ◽  
Water Rock Interaction

scholarly journals CO2 mineralization by olivine at hydrothermal conditions

2014 ◽  
Vol 78 (6) ◽  
pp. 1473-1477
Author(s):  
Jan Přikryl ◽  
Andri Stefánsson
Keyword(s):  
Ph Value ◽  
Hydrothermal Conditions ◽  
Solution Ph ◽  
Rock Interaction ◽  
Carbonate Formation ◽  
Effects Of Temperature ◽  
Co2 Mineralization ◽  
Geochemical Reaction ◽  
Insight Into ◽  
Water Rock Interaction

The interaction of CO2-rich water with olivine was studied using geochemical reaction modelling in order to gain insight into the effects of temperature, acid supply (CO2) and extent of reaction on the secondary mineralogy, water chemistry and mass transfer. Olivine (Fo93) was dissolved at 150 and 250ºC and pCO2 of 2 and 20 bar in a closed system and an open system with secondary minerals allowed to precipitate. The progressive water–rock interaction resulted in increased solution pH, with gradual carbonate formation starting at pH 5 and various Mg-OH and Mg-Si minerals becoming dominant at pH>8. The major factor determining olivine alteration is the pH of the water. In turn, the pH value is determined by acid supply, reaction progress and temperature.

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