Stripa granite

Fritz, P. Barker, J.F. Gale, J.E. "Geochemistry and Isotope Hydrology of Groundwater in the Stripa Granite" LBL-8285 (also SAC-12 and UC-70) Lawrence Berkeley Lab. Berkeley, 1979. 

Fritz, P., Barker, J. F., Gale, J. E., Geochemistry and isotope hydrology of groundwater in the Stripa granite, results and preliminary interpretation, Lawrence Berkeley Laboratory Report LBL-8285, Berkeley, California, 135 p., 1979. 

Wirt L (1988) The origin of chloride in groundwater in the Stripa granite, Sweden. MS Thesis, Univ Arizona, Tucson, Arizona... 

As given in Equation (5.7), the neutron production rate can be expressed as a function of U content. From the production rate, we can calculate the neutron flux (X) with the relation fn = v x n, where v denotes the mean velocity of neutrons and n is an equilibrium concentration of neutrons. The latter quantity is related to the neutron production rate (pn) as n = (pjt) where T denotes the time constant for the neutron absorption in the medium (-2500 s1). Andrew et al. (1986) estimated the average neutron flux in the Stripa granite to be 5.5 x 10 4 neutrons cm 2s, which is in good agreement with the measured flux of 4.7 x 10 4 neutrons cm 2s 1 in the borehole in the granite. 

Andrew, J. N., Hussain, N., Youngman, M. J. (1989) The in situ production of radio isotopes in rock minerals with particular reference to the Stripa granite. Geochim. Cosmochim. Acta, 53, 1803-15. 

Fig. 14.1 Helium concentrations as a function of aquifer depth or temperature (following Mazor and Bosch, 1992a) Bunter sandstone aquifer, eastern England (data from Andrews et al., 1984) Stripa granite, Sweden (data from Andrews et al., 1982) Blumau, Austria (data from Andrews et al., 1984) Molasse Basin, Austria (data from Andrews et al., 1981) Great Artesian Basin, Australia (data from Torgersen and Clarke, 1985).

Good correlation with local depth, as seen in Blumau, the Bunter sandstone aquifer of eastern England, the Stripa granite in Sweden (Fig. 14.1), and in other examples included in Table 14.1, or good correlation with temperature, as seen at the Molasse Basin in Austria and the Great Artesian Basin in Australia (Fig. 14.1). 

Clauer N., Frape S. K., and Fritz B. (1989) Calcite veins of the Stripa granite (Sweden) as records of the origin of the groundwaters and their interactions with the granitic body. Geochim. Cosmochim. Acta S3, 1777—1781. 

Irwin J. J. and Reynolds J. H. (1995) Multiple stages of fluid trapping in the Stripa granite indicated by laser microprobe analysis of Cl, Be, I, K, U, and nucleogenic Ar, Kr, and Xe in fluid inclusions. Geochim. Cosmochim. Acta 59, 355-369. 

Nordstrom D. K., Lindblom S., Donahoe R. J., and Barton C. C. (1989b) Fluid inclusions in the Stripa granite and their possible influence on the groundwater chemistry. Geochim. Cosmochim. Acta 53, 1741-1755. 

In the DECOVALEX I project, modeling was conducted on three hypothetical BMTs and six TCs, involving three small laboratory tests of rock samples and fractures, and three large field tests. Details may be found in Jing et al. (1995). One of the BMTs simulated a Swedish KBS-3 disposal concept in a fractured granitic rock with a fracture network system and properties similar to those of the Stripa granite. This case will be presented in more detail in section 5. 

Aim O, Jaktlund L L. The influence of microcrack density on the elastic and fracture mechanical properties of Stripa granite[J], Physics of the Earth and Planetary Interiors, 40(3), 161 (1985). 

Rouleau, A. Gale, J.E. 1985. Statistical characterization of the fracture system in the stripa granite, Sweden. International Journal of Rock Mechanics and Mining Sciences Geomechanics Abstracts. Volume 22, No 6 353-367. 

Fluid inclusions in the Stripa granite and their possible influence on the groundwater chemistry. Geochimica et Cosmochimica Acta, 53, 1741-1755. 

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