Invited talk at the Goldschmidt Conference

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Posted on 14 August 2017

Ralf Halama, lecturer in Igneous and Metamorphic Petrology, is giving an invited talk entitled “Nitrogen Transfer in Crustal Rocks” at this week’s Goldschmidt Conference in Paris.

The 27th Goldschmidt Conference will host more than 4000 geochemists from more than 50 countries. It is named in honor of Victor M. Goldschmidt (1888-1947) whose pioneering work to explore and define the composition of the Earth laid the basis of modern geochemistry. The conference is hosted by the European Association of Geochemistry.

Ralf will present his work on nitrogen in metamorphic rocks from subduction zones and from the deep continental crust in the session “Rock Nitrogen: From Early Earth History to Modern Sustainable Ecosystem Services”. Key findings include the retention of nitrogen in subduction-related metamorphic rocks, implying depletion of nitrogen in the atmosphere over geological times, and the systematic variations in the nitrogen isotope signature of deep crustal rocks, underlining that ancient nitrogen biogeochemical signatures are significantly modified by high-grade metamorphism. Ralf collaborated with colleagues from the USA, Germany, Spain and Italy and used GGE Research Centre funding to carry out the latest set of analyses in Prof. Gray Bebout’s stable isotope laboratory at Lehigh University (USA).

For more information about Ralf’s work on nitrogen in metamorphic rocks, see the following publications:

Nitrogen transfer during fluid-rock interaction

Nitrogen recycling in subducted mantle rocks

Nitrogen recycling in high-pressure metabasaltic rocks