Lloyd White, Robert Hall, Tony Barber, Marnie Forster & Marcelle Boudagher-Fadel
Sulawesi comprises of a series of microcontinental fragments, magmatic arcs, ophiolite complexes and metamorphic assemblages that amalgamated during the Late Mesozoic and Cenozoic. The timing of these events is relatively poorly understood due to a lack of geochronological data. The aim of this project is to develop a better understanding of the timing of periods of magmatism and deformation in the Latimojong region at the northwestern edge of Bone Bay. This project will provide key ages that help to define the timing of periods of deformation and uplift in Sulawesi, and help us to better understand how this island evolved through time. These will be particularly useful for our understanding of the tectonic evolution of Bone Bay.
The Latimojong Mountains contain the oldest rocks identified in the central western arm of Sulawesi. These are reported to be Upper Cretaceous low-grade metasediments (Latimojong Formation) as well as ophiolites and volcanics (Lamasi Formation). These rocks are overlain by limestones and cross-cut by granitic intrusions, which have subsequently been deformed.