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We report an abundance analysis for the highly r-process-enhanced (r-II) starCS 29497-004, a very metal-poor giant with Teff = 5013K and [Fe/H]=-2.85, whosenature was initially discovered in the course of the HERES project. Ouranalysis is based on high signal-to-noise, high-resolution (R~75000) VLT/UVESspectra and MARCS model atmospheres under the assumption of local thermodynamicequilibrium, and obtains abundance measurements for a total of 46 elements, 31of which are neutron-capture elements. As is the case for the other 25 r-IIstars currently known, the heavy-element abundance pattern of CS 29497-004well-matches a scaled Solar System second peak r-process-element abundancepattern. We confirm our previous detection of Th, and demonstrate that thisstar does not exhibit an "actinide boost". Uranium is also detected (log e(U)=-2.20+/-0.30), albeit with a large measurement error that hampers its use as aprecision cosmo-chronometer. Combining the various elemental chronometer pairsthat are available for this star, we derive a mean age of 12.2+/-3.7 Gyr usingthe theoretical production ratios from waiting-point approximation models(Kratz et al. 2007). We further explore the high-entropy wind model (Farouqi etal. 2010) production ratios arising from different neutron richness of theejecta (Y_e), and derive an age of 13.7+/-4.4 Gyr for a best-fitting Y_e=0.447.The U/Th nuclei-chronometer is confirmed to be the most resilient totheoretical production ratios and yields an age of 16.5+:-6.6 Gyr. Lead (Pb) isalso tentatively detected in CS 29497-004, at a level compatible with a scaledSolar r-process, or with the theoretical expectations for a pure r-process inthis star.

The Hamburg/ESO R-process Enhanced Star survey (HERES) XI. The highly $r$-process-enhanced star CS 29497-004