  We perform a spatially resolved X-ray spectroscopic study of a set of 11
relaxed clusters of galaxies observed by the ROSAT/PSPC and ASCA/SIS. Using a
method which corrects for the energy dependent effects of the ASCA PSF based on
ROSAT images, we constrain the spatial distribution of Ne, Si, S and Fe in each
cluster. Theoretical prescriptions for the chemical yields of Type Ia and II
supernovae, then allow determination of the Fe enrichment from both types of
supernovae as a function of radius within each cluster. Using optical
measurements from the literature, we also determine the iron mass-to-light
ratio (IMLR) separately for Fe synthesized in both types of supernovae. For
clusters with the best photon statistics, we find that the total Fe abundance
decreases significantly with radius, while the Si abundance is either flat or
decreases less rapidly, resulting in an increasing Si/Fe ratio with radius.
This result indicates a greater predominance of Type II SNe enrichment at large
radii in clusters. We suggest that the high Si/Fe ratios in the outskirts of
rich clusters may arise from enrichment by Type II SNe released to ICM via
galactic star burst driven winds. Abridged.
