Schutte, Philip Geochronology, geochemistry, and isotopic composition (Sr, Nd, Pb) of Tertiary porphyry systems in Ecuador - Geneva 2010 - xviii, 182 p. ilus., tbls., gráfs. - Terre and Environnement v.87 . Subjects--Topical Terms: ADAKITAALTERACIÓN HIDROTERMALDATACION RE-OSDATACION U-PBGEOCRONOLOGIAGEODINAMICAGEOQUÍMICAISOTOPOSMAGMATESISYACIMIENTOS PORFIRITICOS Subjects--Geographic Terms: ANDESECUADOR