Reactivation episodes of the romeral fault system in the northwestern part of central andes, colombia, through 39ar-40ar and k-ar results

Direct dating of reactivation of the San Jerónimo Fault (SJF), easternmost limit of the Romeral fault system (RFS), is presented through 39Ar-40Ar and K-Ar results in neo-formed micas and mylonitic bands of strongly hidrothermalized gabbros. Published cooling and crystallization ages from sin-tecton...