*************************************************************************
   72187
   We propose to observe two cool galaxy groups with ASCA to explore the
   enrichment of the group gas. Previous ASCA observations show that the
   metal abundance of hot gas in groups varies strongly from group to
   group, with the hottest groups being the most metal rich. In addition,
   for a few groups the ratio of Si to Fe can be well determined. This
   ratio is used to infer the origin of the metals. The hot groups have a
   Si/Fe ratio of ~2 which indicates that type II SNe dominate the
   enrichment process. The cooler groups (kT ~ 1keV) have Si/Fe ratio near
   1, which is more consistent with type I SNe. Observations of these cool
   groups (kT~0.8) will allow us to measure the abundance of Si and Fe and
   thus determine the enrichement history of the least massive groups
   detected in X-rays.
 *************************************************************************