GGRiP 2015 (Geochemistry group research in progress)
I am giving a keynote talk on the Monday of this conference that links our most recent XANES data (collected at Diamond Light Source) from basalts erupted south of Iceland to the cycling of oxygen through the solid Earth. This work was inspired by a paper by Lecuyer and Ricard (1999), which builds up an inventory of ferric iron for terrestrial reservoirs and demonstrates that there must be a return flux of oxidised iron from Earth’s surface to the deep mantle.
An exciting implication of the Lecuyer and Ricard work is that we will potentially see a signal of ancient ferric iron cycling in the modern day composition of basalts that sample mantle containing recycled oceanic crust. This is what we have tested in this study.