EAG News

Photo Contest ‘Wonders of Geochemistry’: submit your photos by 1 March

photoIf you are passionate about geochemistry and have taken photos that capture the ‘Wonders of Geochemistry’, enter our photo contest! Everyone is allowed to participate and you can submit up to 3 photos.
Authors of the top 3 winning photos will receive a complimentary 5-year EAG membership (worth €100), publication of their photos on the EAG website, newsletter banners and in Elements EAG pages. The photos will also be printed as post cards and available for distribution at Goldschmidt2017.

2017 EAG medallists announced

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EAG Latest Publications

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Comment on “A cometary origin for atmospheric martian methane” by Fries et al., 2016
M.M.J. Crismani, N.M. Schneider, J.M.C. Plane

Reply to Comment on “A cometary origin for martian atmospheric methane” by Crismani et al., 2017
M. Fries

GPL1714_abstract_100Repulsion between calcite crystals and grain detachment during water–rock interaction
Y. Levenson, S. Emmanuel

Weathering in carbonate rocks is often thought to be governed by chemical dissolution. However, recent studies have shown that mechanical detachment of tiny grains contributes significantly to the overall surface retreat. Whether this detachment is caused by shear forces acting at the surface, or repulsive forces acting between grains, was not known. […]

Graph abstEvidence of sub-arc mantle oxidation by sulphur and carbon
A. Rielli, A.G. Tomkins, O. Nebel, J. Brugger, B. Etschmann, R. Zhong, G.M. Yaxley, D. Paterson

The oxygen fugacity (ƒO2) of the Earth’s mantle at subduction zones exerts a primary control on the genesis of mineral deposits in the overlying magmatic arcs and on speciation of volcanic gases emitted into the atmosphere. However, the processes governing mantle ƒO2 such as the introduction of oxidised material by subduction are still unresolved. […]

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gpv5n2_cover_100x100Thoughts and Reminiscences on Experimental Trace Element Partitioning
John H. Jones (NASA Johnson Space Center)

In this issue, John Jones reviews the history of experimental trace element partitioning from his personal point of view. In so doing, he considers experimental and analytical complexities, simple phase equilibria, and thermodynamic considerations. Jones also recounts personal interactions with other geochemists and petrologists.

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