Why hydrothermal fluids cool during flow through permeable fault zones

Christine Andersen1, Lars Rupke2, Joerg Hasenclever3, Ingo Grevemeyer4 and Sven Petersen4, (1)Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences, Potsdam, Germany, (2)GEOMAR, Kiel, Germany, (3)University of Hamburg, Institute of Geophysics, Hamburg, Germany, (4)GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany