Additional note on the origin of the Sudbury structure

Abstract

It has been suggested that the Sudbury Basin could be compared with the Brent meteorite impact crater and that Sudbury may also have developed a relatively flat crater floor at a very early stage. More recent paleomagnetic interpretations appear to fit an original, subhorizontal, sill-like form for the Nickel Irruptive at Sudbury. These suggestions in turn permit formulation of a more satisfying model for the early stages of Sudbury basin evolution. I1 a Cte suggeri que le bassin de Sudbury pourrait ktre compare au cratere form6 par le meteorite a Brent et qu'aussi Sudbury aurait pu developper, tres t6t, un fond de cratere relativement plat. Des interpretations palComagnetiques plus recentes suggerent que le 'Nickel Irruptive' de Sudbury etait a I'origine un sill sub-horizontal. Ces suggestions permettent la formulation d'un modele plus satisfaisant pour les etapes primaires de I'evolution du bassin de Sudbury.