  We present results derived from VLT-FORS2 spectra of 17 globular clusters
associated with the nearby lenticular galaxy NGC3115. Comparing line-strength
indices to new stellar population models by Thomas et al. we determine ages,
metallicities and element abundance ratios. Our data are also compared with the
Lick/IDS observations of Milky Way and M31 globular clusters. Our best age
estimates show that the observed clusters which sample the bimodal colour
distribution of NGC3115 globular clusters are coeval within our observational
errors (2-3 Gyr). Our best calibrated age/metallicity diagnostic diagram (Hbeta
vs [MgFe]) indicates an absolute age of 11-12 Gyr consistent with the
luminosity weighted age for the central part of NGC3115. We confirm with our
accurate line-strength measurements that the (V-I) colour is a good metallicity
indicator within the probed metallicity range (-1.5 < [Fe/H] < 0.0). The
abundance ratios for globular clusters in NGC3115 give an inhomogeneous
picture. We find a range from solar to super-solar ratios for both blue and red
clusters. This is similar to the data for M31 while the Milky Way seems to
harbour clusters which are mainly consistent with [alpha/Fe] =~ 0.3.
