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In southwestern China, several large magmatic Fe–Ti–V oxide ore deposits are hosted by gabbroic intrusions associated with the Emeishan flood basalts. The Panzhihua gabbroic intrusion, a little deformed sill that contains a large titanomagnetite deposit at its base, concordantly intrudes late-Proterozoic dolostones. Mineralogical and chemical studies of the contact aureole in the footwall dolostones...
Abstract Mafic and ultramafic magmatism played an important role in the 3.5Ga long history of the Kaapvaal craton. The oldest (3.5Ga) greenstone belts contain mafic and ultramafic volcanics that erupted in an oceanic environment, probably in oceanic plateaus. Then followed a series of continental flood basalts, from the 3.4Ga old Commondale and Nondweni sequences, to the 180 Ma Karoo basalts. The...
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