1. CONICET-INENCO; Universidad Nacional de Salta; Salta Argentina
2. Centre for Lithospheric Research; Czech Geological Survey; Prague 1 Czech Republic
3. School of Earth, Atmosphere and Environment; Monash University; Clayton Victoria Australia
4. CONICET-IBIGEO; Universidad Nacional de Salta; Salta Argentina
5. Laboratório de Microssonda Eletrônica; Universidade de Brasília; Brasília Brazil