Major and trace element data are presented for Quaternary basalts from Butajira-Kibet area, close to the western escarpment of Central Main Ethiopian Rift investigate petrogenetic processes involved nature mantle source compositions. The indicate that mildly alkaline characterized by moderate high contents MgO (6.85-9.00 wt. %) TiO2 (2.40-2.92 %). In primitive mantle-normalized multi-element di...

Abstract The regolith samples returned by the Chang'E‐5 mission (CE‐5) contain youngest radiometrically dated mare basaltic clasts, which provide an opportunity to elucidate magmatic activities on Moon during late Eratosthenian. In this study, detailed petrographic observations and comprehensive geochemical analyses were performed CE‐5 clasts. major element concentrations in individual plagiocl...

Circa 1.1 Ga granitic magmatism in Texas was manifested as two compositional groups: (1) the 1.12 Ga Red Bluff granitic suite in west Texas; and (2) 1.12-1.07 Ga granites of the Llano uplift of central Texas. Both suites share some characteristics typical of 'anorogenic' granites (e.g. potassiumand iron-rich bulk compositions, Fe-rich hydrous silicates, emplacement conditions involving low oxyg...

Trace-element and Nd-Sr-Pb isotopic data for mafic lavas from the Mascarene island of Mauritius reveal that the shield-stage Older Series (with 143Nd/144Nd = 0.512827 to 0.512853, 87Sr/86Sr = 0.70412 to 0.70433, and 206Pb/204Pb = 18.771 to 19.024) is geochemically very similar to the shield-building lavas of the younger island of Réunion. The post-shield Intermediate and Younger Series lavas of...