Evolution of the Rakiraki Volcano, Mba Volcanic Group, northeast Viti Levu, Fiji
Bhaskar Rao
Time: 12–1 pm
Venue: M107 Lecture Theatre, Marine Campus
Being an introduction to the rocks of the Rakiraki Volcano (Pliocene) of northeast Viti Levu Island, Fiji...
The Rakiraki Volcano, like many of the larger volcanoes of the Mio-Pliocene Mba Volcanic Group in northern Viti Levu, started life as an undersea volcano and only later evolved into a more subaerial edifice. This may be demonstrated through the mapping and chemical investigation of the volcanic and associated volcaniclastic facies. The major and trace element geochemistry provides evidence of a shift from initially shoshonitic to later calc-alkaline/tholeiitic volcanism.
The Rakiraki Volcano is associated with minor epithermal gold mineralisation.
