  We present chemical abundances for O, Na, Mg, Al, Si, Ca, Ti and Fe in eight
red giants and one turnoff star in the metal rich globular cluster 47 Tuc,
based on spectroscopy with the MIKE high resolution spectrograph on the
Magellan 6.5-m Clay telescope. A robust line by line differential abundance
analysis technique, relative to the K-giant Arcturus, was used to reduce
systematic errors from atmospheric and atomic parameters. Our derived mean LTE
[Fe/H] of -0.76 +- 0.01 +- 0.04 dex (random and systematic error, respectively)
is more metal poor by about 0.1 dex than recent literature results. The
chemical element ratios in this nearby globular cluster most closely resemble
those of the Galactic bulge, although there is a non-negligible overlap with
the composition of thick-disk stars. We find that the [Al/Fe] and [Na/Fe]
ratios coincide with the upper boundary of the trends seen in the bulge and
thick disk. There is only a small intrinsic scatter in the majority of the
abundance ratios, indicating that 47 Tuc is mostly a rather chemically
homogeneous system.
