  Copper abundances are presented for 40 red-giant stars in Omega Cen as well
as 15 red-giant members of the globular clusters NGC288, NGC362, NGC3201,
NGC6752, and M4. A comparison with the halo field star pattern indicates that,
unlike the field stars, Omega Cen displays a constant ratio of [Cu/Fe] -0.5 all
the way from [Fe/H]=-2.0 to -0.8. At the metallicity of [Fe/H]= -0.8, the
values of [Cu/Fe] in Omega Cen fall below the corresponding mean ratio in the
field stars by roughly 0.5 dex. If copper is produced primarily in type Ia
supernovae (SN Ia), the lack of an increase in [Cu/Fe] in Omega Cen would
suggest very little contribution from SN Ia to its chemical evolution within
the metallicity range from [Fe/H] of -2.0 up to -0.8.
