EAG News

Goldschmidt2018: Abstract submission and registration open online

G18_logo_100Abstract submission for the Goldschmidt 2018 Conference, scheduled for Boston from August 12-17, is now open. Learn how to prepare and submit your abstract here; the deadline is March 30, 2018. The full list of sessions to which you may submit an abstract is here.
Early online registration is also open; registration fees will increase by $100 after June 12, 2018.

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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commentandreply_100Comment on “Repulsion between calcite crystals and grain detachment during water-rock interaction” by Levenson and Emmanuel, 2017
M. Le Merrer, J. Colombani

Levenson and Emmanuel suggested recently that the mechanism of carbonate rock weathering in fluids is not limited to nanoscale processes but that chemico-mechanical processes also take place at the micrometre scale, such as grain detachment from the material surface. This phenomenon was first observed in flowing liquids (Levenson and Emmanuel, 2016). […]

commentandreply_100Reply to comment on “Repulsion between calcite crystals and grain detachment during water-rock interaction” by Le Merrer and Colombani, 2017
Y. Levenson, S. Emmanuel

The comment by Le Merrer and Colombani (2017) focuses on the mechanisms that could account for our experiments, in which we observed the detachment of micrometre scale calcite grains from the surface of micritic limestone during contact with a reactive fluid (Levenson and Emmanuel, 2017). They discuss some of the forces acting on the grains and imply that our observations are likely to be artefacts of the experimental method. […]

PrintIodine proxy evidence for increased ocean oxygenation during the Bitter Springs Anomaly
W. Lu, S. Wörndle, G.P. Halverson, X. Zhou, A. Bekker, R.H. Rainbird, D.S. Hardisty, T.W. Lyons, Z. Lu

The Neoproterozoic Bitter Springs Anomaly (BSA; 810–800 Ma) is characterised by an 8 ‰ negative δ13C excursion and is coeval with multiple indicators of increasing oxygenation of the ocean and atmosphere. Here, we use carbonate iodine contents to provide the first constraints on the evolution of local upper ocean redox conditions spanning the BSA. […]

GPL1745_abstract_100Hydrocarbons as ore fluids
A.A. Migdisov, X. Guo, H. Xu, A.E. Williams-Jones, C.J. Sun, O. Vasyukova, I. Sugiyama, S. Fuchs, K. Pearce, R. Roback

Conventional wisdom holds that aqueous solutions are the only non-magmatic fluids capable of concentrating metals in the Earth’s crust. The role of hydrocarbons in metal concentration is relegated to providing geochemical barriers at which the metals are reduced and immobilised. […]

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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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