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47 Tuc is an ideal target to study chemical evolution and GC formation inmassive more metal-rich GCs since is the closest, massive GC. We presentchemical abundances for O, Na, Al, Si, Ca, Ti, Fe, Ni, La, and Eu in 164 redgiant branch (RGB) stars in the massive globular cluster 47 Tuc using spectraobtained with both the Hydra multi-fiber spectrograph at the Blanco 4-mtelescope and the FLAMES multi-object spectrograph at the Very Large Telescope.We find an average [Fe/H]=--0.79$\pm$0.09 dex, consistent with literaturevalues, as well as over-abundances of alpha-elements($[\alpha/\mbox{Fe}]\sim0.3$ dex). The n-capture process elements indicate that47 Tuc is r-process dominated ([Eu/La]=+0.24), and the light elements O, Na,and Al exhibit star-to-star variations. The Na-O anti-correlation, a signaturetypically seen in Galactic globular clusters, is present in 47 Tuc, and extendsto include a small number of stars with [O/Fe] $\sim$\,--0.5. Additionally, the[O/Na] ratios of our sample reveal that the cluster stars can be separated intothree distinct populations. A KS-test demonstrates that the O-poor/Na-richstars are more centrally concentrated than the O-rich/Na-poor stars. Theobserved number and radial distribution of 47 Tuc's stellar populations, asdistinguished by their light element composition, agrees closely with theresults obtained from photometric data. We do not find evidence supporting astrong Na-Al correlation in 47 Tuc, which is consistent with current models ofAGB nucleosynthesis yields.

Detailed Abundances for a Large Sample of Giant Stars in the Globular Cluster 47 Tucanae (NGC 104)