Diagenetic albitization in the Tera Group, Cameros Basin (NE Spain) recorded by trace elements and spectral cathodoluminescence

► Geochemical and cathodoluminescence study of feldspar albitization. ► Correlation between Ba content and blue luminescence in K-feldspars. ► Coupled Ba and Al substitution with Al-O−-Al centers as CL activators. ► Weathered feldspar characteristic at 590 nm CL emission. ► Albitized feldspars emission at 620 nm plus increase of red emission at 720 nm.