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- W2146671340 abstract "The motion of aqueous and magmatic liquids has a large influence on the evolution of thecooling and chemically differentiating Earth. In many geological environments, these fluidspercolate through the pores and fractures of a solid matrix, which is composed of (un)conso-lidatedrocks or solidified magma. The major driving forces within the liquid arise from thepressure, temperature and compositional variations present within the liquid, or fromthe den-sitydifference between liquid and solid states. Buoyancy driven flow (also called convection)in these porous or fractured media is capable to efficiently transport heat and chemical ele-mentswithin and between geological environments. As a consequence, convection in porousor fractured media plays a significant role in, or even dominates, a wide variety of geologicalprocesses [Jaupart and Tait, 1995; Ingebritsen and Sanford, 1998].In the oceanic crust, for instance, hydrothermal circulation accounts for about one thirdof the heat flux through the ocean floor or 25 percent of the global heat loss [Lowell et al,1995]. To dissipate this heat, estimated at 10 13 W, the mass of the oceans is circulated throughthe crust approximately every one million years [Elderfield and Schultz, 1997]. These sub-seafloorhydrothermal systems are driven by heat loss from magma lenses beneath spreadingcenters and from already solidified basaltic crust. Advective fluxes are important for all themajor ocean basins to seafloor ages of 65 10 Myr [Stein and Stein, 1994]. Ninety percentof the oceanic heat flux occurs on the sedimented flanks of the spreading centers [Mortonand Sleep, 1985]. It was also at these flanks that convective circulation was first invokedas an explanation for the missing heat in the measured heat flow values, as compared withthose predicted by theoretical models of conductively cooling oceanic crust." @default.
- W2146671340 created "2016-06-24" @default.
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- W2146671340 date "1999-10-18" @default.
- W2146671340 modified "2023-09-26" @default.
- W2146671340 title "Thermochemical convection in porous media : an application to hydrothermal systems and magmetic intrusions" @default.
- W2146671340 hasPublicationYear "1999" @default.
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