How broad and deep is the region of chemical alteration of oceanic plates at trenches?
Cesar R Ranero, ICM-CSIC, Barcelona Center for Subsurface Imaging, ICREA at CSIC, Instituto de Ciencias del Mar, Barcelona, Spain, Barcelona, Spain, Ingo Grevemeyer, GEOMAR, Kiel, Germany and Udo Barckhausen, BGR Federal Institute for Geosciences and Natural Resources, Hanover, Germany
