M. Linda Iaccheri
Thesis: Petrogenesis of the plutonic rocks in the Granites-Tanami Orogen
There is general agreement that the continental crust is the result of the Earth’s evolution, but there are various theories on how and when the crust developed. The proposed study will consider the difference between crustal growth and crustal preservation using the poorly studied Paleoproterozoic Granites-Tanami Orogen in the North Australian Craton.
Results of the newly developed in-situ techniques of “forensic zirconology” combined with traditional whole-rock analyses of Sm-Nd, Rb-Sr and Lu-Hf isotopes on igneous rocks, will characterise the source and magmatic processes in the Granites-Tanami Orogen.
The geochemical results will be integrated with geophysical datasets to build up a comprehensive 4D (3D + time) map of the lithospheric architecture in the Granites-Tanami Orogen. The 4D mapping will be used to solve the evolution of the orogen, refine the poorly constrained tectonic evolution of the North Australian Craton, and identify controls on the major mineral endowments, which is of greatest interest for mineral exploration.
Why my research is important
The project’s focus is on the development of models for the geodynamics of crustal evolution using state-of-the-art isotope geochemical methods and geophysical data to characterise magmatism and its sources through time. The aim is to develop new tools in locating economically important ore systems.