%0 Journal Article %J Bulletin of Volcanology %D 2004 %T Role of magma mixing in the petrogenesis of tephra erupted during the 1990-98 explosive activity of Nevado Sabancaya, southern Peru %A Gerbe, Marie-Christine %A Thouret, Jean-Claude %P 541-561 %U http://www.springerlink.com/openurl.asp?genre=article&id=doi:10.1007/s00445-004-0340-3 %V 66