Chromite and platinum group elements mineralization in the Santa Elena Ultramafic Nappe (Costa Rica): geodynamic implications - Zaccarini, F. (University of Leoben. Department of Applied Geosciences and Geophysics) ; Garuti, G. (University of Leoben. Department of Applied Geosciences and Geophysics) ; Proenza, J. A. (Universitat de Barcelona. Departament de Cristal·lografia, Mineralogia i Dipòsits Minerals) ; Campos, L. (University of Costa Rica. Escuela Centroamericana de Geología) ; Thalhammer, O. A. R. (University of Leoben. Department of Applied Geosciences and Geophysics) ; Aiglsperger, T. (Universitat de Barcelona. Departament de Cristal·lografia, Mineralogia i Dipòsits Minerals) ; Lewis, J. F. (The George Washington University. Department of Earth and Environmental Sciences)