Colin Macpherson, Heather Handley, Chris Dale & Robert Hall

To improve our understanding of the timing and nature of magmatism and magmatic rocks in SE Asia in order to provide new constraints on their relationship to petroleum and mineral resources.

Volcanoes are among the most conspicuous geological phenomena in SE Asia and most major islands in the region have experienced Cenozoic magmatism. Magmatic rocks provide information regarding the age and nature of tectonic activity with which they are associated. For example, the mantle will melt as it upwells beneath an extensional basin so the distribution and chemistry of magma erupted into the basin depends on the locus and amount of lithospheric stretching. Subduction and collision processes also generate distinctive magmas which record the sediment supply to subduction zones and the loss of arc lithospheric roots.