From basin to basement: the movement of surface fluids into the crust

Gleeson, S.A., Yardley, B.W.D., Boyce, A.J. , Fallick, A.E. and Munz, L.A. (2000) From basin to basement: the movement of surface fluids into the crust. Journal of Geochemical Exploration, 69, pp. 527-531. (doi: 10.1016/S0375-6742(00)00114-X)

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Quartz veins from Precambrian, high grade, basement rocks in Southern Norway contain both aqueous and biogenically sourced hydrocarbon fluid inclusions. Aqueous fluids show a wide range in salinities (0-40 wt% NaCl eq.) and densities (0.80-1.16 g/cm(3)) but the ultimate source of this salinity is unclear. The oxygen isotopic composition of most of the veins is dominated by the host-rock compositions. Surface derived fluids migrated downwards as a result of extension of dry crystalline basement rocks with pore fluid pressures less than hydrostatic. Quartz precipitation occurred in the veins initially at near hydrostatic pressures but later quartz generations were precipitated at pressures closer to lithostatic.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Boyce, Professor Adrian and Fallick, Professor Anthony
Authors: Gleeson, S.A., Yardley, B.W.D., Boyce, A.J., Fallick, A.E., and Munz, L.A.
Subjects:T Technology > TN Mining engineering. Metallurgy
Q Science > QE Geology
College/School:College of Science and Engineering > Scottish Universities Environmental Research Centre
Journal Name:Journal of Geochemical Exploration

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