The Late Cretaceous Impact of the Trindade Mantle Plume: Evidence from Large-volume, Mafic, Potassic Magmatism in SE Brazil

S. A. GIBSON*, R. N. THOMPSON, O. H. LEONARDOS, A. P. DICKIN AND J. G. MITCHELL 'DEPARTMENT OF GEOLOGICAL SCIENCES, UNIVERSITY OF DURHAM, SOUTH ROAD, DURHAM DHi 3LE, UK "DEPARTMENTO DE GEOQUIMICA E RECURSOS MINERAIS, INSTITUTO DE GEOCIENCIAS, UNIVERSIDADE DE BRASILIA, 70910 BRASILIA DF, BRAZIL 'DEPARTMENT OF GEOLOGY, McMASTER UNIVERSITY, is8o MAIN STREET WEST, HAMILTON, ONTARIO, CANADA L8S 4M1 'DEPARTMENT OF PHYSICS, THE UNIVERSITY, NEWCASTLE UPON TYNE NEi 7RU, UK.

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