Neoproterozoic contaminated MORB of Wadi Ghadir ophiolite, NE Africa: Geochemical and Nd and Sr isotopic constraints

► Similar to MORB ophiolites, the metabasalts of Wadi Ghadir are characterized by high TiO2 values. ► Enrichment in LREE, Th and U indicate that Wadi Ghadir metabasalts are similar to contaminated MORB. ► The variable LILE-enrichment is due to source & crustal contamination & post-magmatic alteration. ► The low εNd(t) values of some samples reflect their contamination by slightly older arc crust. ► The degree of contamination of the Eastern Desert ophiolites increases from south to north.