Geochemistry of soils close to abandoned Sb-Au and As-Au mines from Valongo, northern Portugal Carvalho, P. C. S. ; Neiva, A. M. R. ; Silva, M. M. V. G. Abstract Publication: Geochimica et Cosmochimica Acta Supplement Pub Date: June 2009 Bibcode: 2009GeCAS..73R.196C