SSG
december 2008
junij 2007
april 2007
oktober 2006
maj 2006
februar 2006
junij 2005
maj 2005
marec 2005
april 2004
marec 2004
februar 2004
december 2003
november 2003
oktober 2003
junij 2003
marec 2003
februar 2003
januar 2003
december 2002
november 2002
maj 2002
april 2002
marec 2002
februar 2002
januar 2002
december 2001
november 2001
oktober 2001
april 2001
marec 2001
februar 2001
januar 2001
december 2000

 

 

predavanje 31. maja 2005 ob 19:00,
Mala dvorana ZRC SAZU, Novi trg 4, II. nadstropje

Wolfgang Dreybrodt 
Karst Processes Research Group, University of Bremen, Nemčija

Island karst: evolution of porosity in young, porous limestone by mixing corrosion in freshwater- saltwater mixtures 

Mixing of  seawater and freshwater, both saturated with respect to calcite, renews undersaturation. This causes dissolution of limestone in the mixing zone of freshwater lenses below carbonate islands, e.g. Bahamas, or coastal aquifers. Flank-margin caves are characteristic karst features. In contrast to classical karst in diagenetically mature rock where water flows through primary fractures, the hydrological properties of aquifers in porous rock are governed by Darcy flow. This causes other pathways to karstification. A model of these is presented.

.