Mafic metaigneous rocks of the leptyno-amphibolite group of the French Massif Central in the Haut Allier region include amphibolites, granulites and other high-grade metamorphic rocks such as eclogites. Many granulites and eclogites were retromorphosed into amphibolite facies. Most rocks have basaltic compositions. Some amphibolites have a cumulate character and resemble oceanic gabbros. Amphibolites without high-grade relics retain most of their original compositions (typical of oceanic tholeiites, including flat REE patterns, Zr Nb = 10–17 , La Nb = 0.6–0.9 , Ti V = 18–38 , and Ti Zr = 76–97 ) and were probably formed in the back-arc environments. The other rocks, including amphibolites with high-grade relics, are enriched in incompatible elements such as light REE, Rb and Ba, at least partially due to secondary processes (e.g., retrograde metamorphism, effects of neighbouring granite intrusion).