EAG News

Goldschmidt2018: Berner Lecture call for nominations

The 2nd Bob Berner Lecture will take place at the 2018 Goldschmidt Conference in Boston. The lecturer should be a mid-career scientist who has shown exceptional ability to define globally important biogeochemical processes, has developed new understanding(s), and has significantly advanced the corresponding area of research. Find out more about the Berner Lecture.
Nomination deadline is 15 January.

2017 Distinguished Lecture Tour: videos of lectures available

DLPVideos of the lectures given by Lenny Winkel during the EAG Distinguished Lecture Tour 2017 are online: ‘Arsenic contamination of groundwaters’, ‘Global biogeochemical cycling of selenium’ and ‘Predicting broad-scale environmental distributions of trace elements’.

EAG Latest Publications

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GPL1744_abstract_100Ultra-high pressure and ultra-reduced minerals in ophiolites may form by lightning strikes
C. Ballhaus, R. Wirth, R.O.C. Fonseca, H. Blanchard, W. Pröll, A. Bragagni, T. Nagel, A. Schreiber, S. Dittrich, V. Thome, D.C. Hezel, R. Below, H. Cieszynski

Since ultra-high pressure (UHP) minerals have been discovered in ophiolites from Tibet and the Polar Urals, it is speculated that the mantle sections of ophiolites may originate deep within the mantle. The UHP minerals are frequently found together with ultra-reduced silicides, carbides, and nitrides. […]

GPL1741_abstract_100Tin isotopic fractionation during igneous differentiation and Earth’s mantle composition
N. Badullovich, F. Moynier, J. Creech, F.-Z. Teng, P.A. Sossi

Tin exists both under the 2+ and 4+ oxidation states in igneous systems, and thus its geochemical behaviour changes as a function of oxygen fugacity. To characterise the redox state of Sn during magmatic differentiation and how this affects its isotope composition, we have measured Sn isotopic and elemental abundances in a suite of samples from the Kilauea Iki lava lake. […]

GPL1743_abstract_100Magnetotactic bacteria as a new model for P sequestration in the ferruginous Lake Pavin
S. Rivas-Lamelo, K. Benzerara, C.T. Lefèvre, C.L. Monteil, D. Jézéquel, N. Menguy, E. Viollier, F. Guyot, C. Férard, M. Poinsot, F. Skouri-Panet, N. Trcera, J. Miot, E. Duprat

The role of microorganisms in the geochemical cycle of P has received great interest in the context of enhanced biological phosphorus removal and phosphorite formation. Here, we combine scanning and transmission electron microscopies, confocal laser scanning microscopy and synchrotron-based x-ray microfluorescence to analyse the distribution of P at the oxic-anoxic interface in the water column of the ferruginous Lake Pavin. […]

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GPv6n1_100Future Global Mineral Resources
Nicholas T. Arndt, Lluís Fontboté, Jeffrey W. Hedenquist, Stephen E. Kesler, John F.H. Thompson and Daniel G. Wood

In this issue of Geochemical Perspectives, six authors with wide experience in ore deposit research, exploration and production present an optimistic but realistic appraisal of future mineral resources. They describe how ore deposits form, and how they are found, assessed, mined and processed. They discuss the critical differences between mineral reserves and resources, how economic and societal factors influence supply, and the critical roles that geoscientists will continue to play. The authors argue that mineral resources will remain adequate well into the future.

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