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We present ages, [Fe/H] and abundances of the alpha elements Ca I, Si I, TiI, Ti II, and light elements Mg I, Na I, and Al I for 31 globular clusters inM31, which were obtained from high resolution, high signal-to-noise ratio(SNR$>60$) echelle spectra of their integrated light. All abundances and agesare obtained using our original technique for high resolution integrated lightabundance analysis of globular clusters. This sample provides a never beforeseen picture of the chemical history of M31. The globular clusters aredispersed throughout the inner and outer halo, from 2.5 kpc $<$ R$_{\rm M31}$$<$ 117 kpc. We find a range of [Fe/H] within 20 kpc of the center of M31, anda constant [Fe/H]$\sim-1.6$ for the outer halo clusters. We find evidence forat least one massive globular cluster in M31 with an age between 1 and 5 Gyr.The alpha-element ratios are generally similar to Milky Way globular clusterand field star ratios. We also find chemical evidence for a late-time accretionorigin for at least one cluster, which has a different abundance pattern thanother clusters at similar metallicity. We find evidence for star-to-starabundance variations in Mg, Na, and Al in the globular clusters in our sample,and find correlations of Ca, Mg, Na, and possibly Al abundance ratios withcluster luminosity and velocity dispersion, which can potentially be used toconstrain globular cluster self-enrichment scenarios. Data presented here wereobtained with the HIRES echelle spectrograph on the Keck I Telescope.

The Detailed Chemical Properties of M31 Star Clusters I. Fe, Alpha and Light Elements