ARC Centre of Excellence for Core to Crust Fluid Systems

2013 CCFS Science Advisory Committee

Professor James Farquhar - Earth Systems Science Interdisciplinary Center and Department, University of Maryland, Maryland, USA

Professor Michel Gregoire - Directeur de recherche, CNRS, Observatoire Midi-Pyrénées, Head of the laboratory Géosciences Environnement, Toulouse, France

Professor Giorgio Ranalli - Department of Earth Sciences Carleton University, Ottawa, Canada

Professor Rob van der Voo - Geological Sciences, University of Michigan

Professor James Farquhar - Earth Systems Science Interdisciplinary Center and Department, University of Maryland, Maryland, USA

Professor Farquhar’s research interests include Stable isotope geochemistry, atmosphere-surface interactions, atmospheric evolution, sulfur and oxygen biogeochemistry, meteorite studies, isotopic exchange and thermometry.

For the past 10 years, his collaborative research has focused on a variety of questions that are broadly connected to sulfur isotopes as well as systems that extend beyond sulphur:

The Geological Record: 

• Atmospheric evolution
• Sulfide deposits

Sulfur Cycling in Biological Systems:

• Metabolic transformations of sulphur
• Using sulfur isotopes to constrain cycling of sulfur in modern systems– lakes, marshes, hydrothermal pools, and sulfidic basins
• Developing tools to investigate the antiquity of biological processes
• Organic sulfur compounds with an emphasis on DMS and DMSP. Isotope effects - exchange reactions, aqueous oxidation reactions, MIE 

Cosmochemistry: 

• Martian Meteorites
• Composition of juvenile sulfur in solar system materials (lunar samples, iron meteorites, basaltic achondrites)
• Low temperature phases and weathering in meteorites.

Atmospheric applications: 

• Atmospheric deposition (environmental studies of nitrate and sulfate).  
• Experimental studies of photochemical mass-independent isotope effects

http://www.geol.umd.edu/faculty/FARQUHAR/farquhar.html 
 
 

Professor Michel Gregoire – Directeur de recherche, CNRS, Observatoire Midi-Pyrénées, Head of the laboratory Géosciences Environnement, Toulouse, France

Professor Gregoire has broad interests in petrology, mineralogy and geochemistry, particularly ultrabasic and basic rocks from lower crustal and mantle domains. He is currently undertaking collaborative work on petrological and geochemical studies of ultrabasic and basic rocks from a wide range of localities including; Patagonia, Kerguelen Islands, Philippines, French Massif Central, Poland, Algeria, Oman, California, Cameroon and South Africa. All these studies focus on the nature and evolution of the various metasomatic melts percolating the oceanic and sub-continental upper mantle, both in intraplate and subduction zone settings, through a detailed analyses of the major and trace element contents both in bulk rocks and minerals using electron microprobe and solutions and laser ICP-MS techniques (which he is a specialist in). A particular aim of these studies is to look at the residency of the trace elements in the upper mantle and lower crustal rocks and to calculate the inter-mineral partition coefficients in these natural mantle and lower crustal samples.

In the near future he intends to study ultramafic and mafic rocks occurring in other type of occurrences such as the ophiolites, the orogenic lherzolite massifs and the deep layered intrusions. 

The final goal of all these studies is to better constrain and better understand the nature and the evolution of the lower crust and the upper mantle in various settings and in particular to better understand the nature and evolution of the crust-mantle boundary and the chemical exchanges taking place between these two major earth reservoirs.

http://w3.dtp.obs-mip.fr/~gregoire/ 

Professor Giorgio Ranalli - Department of Earth Sciences Carleton University, Ottawa, Canada

Professor Ranalli’s primary field of interest is the role of rheology in geodynamic processes. An assessment of the rheology of the lithosphere and mantle requires evaluation of the effects of temperature, pressure, composition, presence of volatiles and partial melt, and kinematic and dynamic conditions. The main observables are obtained from geophysics (from short-period seismic waves propagation and attenuation to long-period glacioisostatic rebound and plate motions), geology (tectonics and seismicity), and petrology (regional variations in the lithospheric and sub-lithospheric mantle). He considers the production of geodynamic models integrating and satisfying data from different subdisciplines one of the main challenges facing the Earth Sciences today.

http://www.earthsci.carleton.ca/people/ranalli-g

Professor Rob van der Voo – Geological Sciences, University of Michigan

Professor van der Voo’s primary fields of study include geophysics and tectonics and paleomagnetism.

His research centres on paleomagnetism and its application to mountain-building processes and pre-Mesozoic plate tectonics. In addition, he and his students are involved in studies of the more theoretical aspects of the Earth's magnetic field and its history, and the processes by which sedimentary and igneous rocks acquire their magnetizations.

http://www.lsa.umich.edu/earth/people/faculty/ci.vandervoorob_ci.detail