[1] Inst Potosino Invest Cient & Tecnol IPICYT, Div Geociencias Aplicadas, Camino Presa San Jose 2055, San Luis Potosi 78216, San Luis Potosi, Mexico
[2] Univ Leicester, Sch Geog Geol & Environm, Leicester, Leics, England
[3] Univ Nacl Cordoba, Ctr Invest Ciencias Tierra CICTERRA, Consejo Nacl Invest Cient & Tecn, Fac Ciencias Exactas Fis & Nat, Cordoba, Argentina
[4] Univ Complutense UCM, Dept Mineral & Petrol, Fac Ciencias Geol, Madrid, Spain
[5] Univ Autonoma San Luis Potosi, Inst Geol, San Luis Potosi, San Luis Potosi, Mexico