Many deposits of metals like copper, molybdenum, tin, tungsten, zinc and lead are associated with either magmatism or magmatic rocks or both. For example, there is a clear temporal and spatial connection between intermediate to felsic intrusions and major porphyry Cu-Au-Mo deposits in tectonic environments related to subduction, whereas massive sulfide Cu-Zn-Pb ores are hosted within basalt-andesite-dacite-rhyolite rocks in mid-ocean spreading ridges and back-arc settings. Despite the empirical data supporting a clear association between magma type, tectonic location and development of ore deposits, our understanding of the behaviour of metallic and volatile elements (S, Cl, F, and H2O) during magma evolution and the separation of precursor hydrothermal fluid is limited. The aims of this PhD project are to:
This project involves a combination of volcanological, petrological and geochemical analyses with melt inclusion studies. The main steps are:
These steps will yield data on temperature, and silicate melt and coexisting fluid compositions (including metals and volatiles). This data will be for resolving the question of whether migrating and cooling magma-derived fluids carry enough metals to be responsible for links between mineralisation and western Pacific magmatism in general.
|Contact:||Prof Vadim Kamenetsky
|Contact:||Prof Bruce Gemmell
Authorised by the Dean of Graduate Research
15 September, 2014