Garnier et al. (2008) did not observe evidence of a fluid circulating through the marble. They proposed that aluminum and chromium originally sedimented within the carbonate platform. These elements were mobilized due to the presence of halogen elements (fluorine and chlorine) from evaporitic rocks. We propose that the mobilization of Ni and Co happened through the same process. Another hypothesis is that Ni and Co were mobilized from amphibolitic rocks interlayered in the marble (observed by Garnier et al., 2006) via halogen-rich fluids. Fluids can be formed by the metamorphism of clay minerals, evaporate, and organic matter (Giuliani et al., 2003; Garnier et al., 2008).