Quantitative major elements EMPA analyses of spinel and chlorite from metamorphic chromitites of the Calzadilla Ophiolite (SW Iberian Massif)

This dataset contains analyses of "in situ" major elements from a porphyroclastic and porphyroblastic spinels in metamorphic chromitites which they form part of mantle section of one of the oldest Precambrian ophiolites exposed along European Variscan suture (Calzadilla Ophiolite, SW of Iberian Massif).