Fluid inclusions in the Stripa granite and their possible influence on the groundwater chemistry

Porosity and fluid velocities in the upper continental crust (2 to 4 km) inferred from injection tests at the Soultz-sous-Forêts geothermal site

“…The difference between these two estimates is attributed to the development of a second-order porosity generated by stimulation of the granitic medium (not taken into account in petrographic observations) and underestimation of the fracture network density due to the one-dimensional observation of the borehole. The highest values compare more closely with values in the literature (Nordstrom et al, 1989b;Savoye et al, 1998), although the scale of investigation is different.…”

Br/Cl ratios and O, H, C, and B isotopic constraints on the origin of saline waters from eastern Canada

“…(1) ancient seawater incursion or marine aerosols (e.g., Long et al, 1992); (2) leakage from fluid inclusions (Nordstrom et al, 1989b); (3) evaporation and evapotranspiration of marine-influenced fluids or dissolution of evaporite deposits; and (4) prolonged water-rock reaction with Cl-bearing minerals (Kamineni, 1987;Kamineni et al, 1992).…”

“…Furthermore, the Sr isotope systematics of the BMC saline waters are inconsistent with cryogenesis during glaciation over the last <1 Ma (e.g., Starinsky and Katz, 2003); the Sr isotopes are clearly rock-dominated and significantly more radiogenic than seawater (Leybourne and Cousens, 2005). Nordstrom et al (1989b) showed that the chemistry of brackish waters at the Stripa mine, Sweden, was consistent with a major contribution of Cl-salinity from leakage of fluid inclusions. Fournier (1999) showed that hypersaline brines can form via rock reaction by volatiles expelled from crystallizing granitic magmas, and that these brines may subsequently be trapped as fluid inclusions.…”

Étude géochimique des eaux souterraines à la mine Joe Mann, Chibougamau, Québec /

“…Donc, la concentration en chlore étaye l'hypothèse d'eaux salines diluées présentes dans la mine. La source d'un enrichissement en chlore dans des environnements de roches cristallines a été attribuée à une variété de processus géologiques incluant le relâchement à partir des amphiboles et/ou des inclusions fluides (Nordstrom et al, 1989 ;Kamineni et al, 1992), la dissolution d'anciens sels matriciels dans les pores de la roche (Kotzer et al, 1998), un enrichissement en fonction de la perte d'eau durant une production radiolytique de deuterium dans le sous-sol (Vovk, 1987), la concentration de l'évaporation de l'eau de mer paléozoïque (Bottomley et al, 1994), l'infiltration de l'eau du bassin protérozoïque (Guha et Kanwar, 1987) et l'expulsion d'un soluté pendant un cycle de gel de l'eau de mer (Bein etArad, 1992).…”