My research program aims to develop a better understanding of the evolution of crust in the core zones of large orogens.
This involves investigations of:
- earlier features that may have influences the development of an orogen
- crustal reworking by high temperature processes during orogenesis.
In addition I am interested in partial melting and high-T metamorphic processes in general
Why the Grenville?
Recent and current work in the central Grenville is on:
Snapshots of a bimodal felsic mafic sequence from the southern Manicouagan area, central Grenville Province
Recent and current work involves investigations of high-T metamorphic rocks in diverse tectonic settings as for instance:
- high-P and mid-P segments of the central Grenville
- high-P and mid-P segments of the Himalayas
- a high-P–T metamorphic sole of an ophiolite from central Greece
- a polymetamorphic UHT aureole of the Nain plutonic suite in Labrador
In this research we take advantage of new imaging techniques and advances in phase equilibria modeling (using THERMOCALC) for integrated interpretations of microstructures and mineral chemistry in terms of P-T paths.
Examples of SEM-MLA maps of polished thin sections
Nodular aluminous gneiss from the central Grenville (provided by M. Hindemith, MSC in progress)
Pink Grt Orange Rt Orange Bt Yellow Sil Green Spl
Shades of Grey: Light Qtz Medium Kfs Dark Pl
Aluminous paragneiss from the eastern Himalayas
Examples of former melt- textures in anatectic aluminous rocks
(provided by S. Lasalle, PhD in progress)