  We present the preliminary analysis of a deep (100ks) XMM-Newton observation
of M82. The spatial distribution of the abundances of chemical elements (Fe, O,
Ne, Mg, Si, S) is investigated through narrow-band imaging analisys and
spatially-resolved spectroscopy. We find that the abundances of alpha-elements
follow a bipolar distribution, these elements being more abundant in the
gaseous outflow than in the galaxy centre. This behaviour is found to be more
marked for lighter elements (O, Ne) than for heavier elements.
