Telltale signs of metal recycling in the circumgalactic medium of a $z \sim 0.77$ galaxy.

We present gravitational-arc tomography of the cool-warm enriched circumgalactic medium (CGM) of an isolated galaxy at $z \approx 0.77$. Combining VLT/MUSE adaptive-optics and Magellan/MagE echelle spectroscopy we obtain partially-resolved kinematics of Mg~{\sc ii} in absorption. The unique arc configuration allows us to probe 42 spatially independent positions, covering the minor and major axes at impact parameters of $\approx 10-30$ kpc and $\approx 60$ kpc, respectively, plus $4$ positions in front of the galaxy. We observe a direct kinematic connection between the cool-warm enriched CGM (traced by Mg~{\sc ii}) and the interstellar medium (traced by [O~{\sc ii}] in emission). This provides evidence for the existence of an extended disc out to tens of kiloparsecs that co-rotates with the galaxy. The Mg~{\sc ii} velocity dispersion ($\sigma \approx 30-100$ km s$^{-1}$, depending on positions) is of the same order as the modeled galaxy rotational velocity ($v_{\rm rot} \approx 80$ km s$^{-1}$), providing evidence for the presence of a turbulent and pressure-supported CGM component. We consider the absorption to be modulated by a galactic-scale outflow, as it offers a natural scenario for the observed line-of-sight dispersion and asymmetric profiles observed against both the arcs and the galaxy. An extended enriched co-rotating disc together with the signatures of a galactic outflow are telltale signs of metal recycling in the $z\sim 1$ CGM.