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New study shows bacteria can use magnetic particles to create a 'natural battery'
European Association of Geochemistry
New research shows bacteria can use tiny magnetic particles to effectively create a "natural battery." According to work published in journal Science, the bacteria can load electrons onto and discharge electrons from microscopic particles of magnetite. This discovery holds out the potential of using this mechanism to help clean up environmental pollution, and other bioengineering applications. The European Association of Geochemistry is highlighting this work as especially interesting.
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Meeting Assistance Program awards 3 grants
The Geochemical Society Program Committee has recently approved three Meeting Assistance Program (MAP) grants of US$ 2000 each to: the Gordon Research Seminar and Conference on the Interior of the Earth: Surface Connections held June 7-12 in South Hadley, MA USA; the Gordon Research Seminar and Conference on Chemical Oceanography held July 26-31 in Holderness, NH, USA; and the RIMG Short Course: Pore Scale Geochemical Processes held Aug. 15-16 in Prague, Czech Republic. For more information on the Meeting Assistance Program, including how to apply, visit the MAP webpage.
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  Analab Corrosion Resistant Laboratory Appliances

Analab manufacture corrosion resistant laboratory appliances such as acid vapour cleaning stations, hotplates, and sample preparation devices. Our devices can be used with a wide range of acids and bases (HF to NH4OH). We are represented in North America by Isomass Scientific.

Please visit us at Goldschmidt Aug 16 – 21/15 in Prague.

ELEMENTS: Arc Magmatic Tempos
The April issue of Elements magazine (volume 11, issue 2) went to press March 27 and is scheduled to be mailed April 13. In this issue, the characteristics, potential causes, and implications of episodic magmatism in oceanic and continental arcs are explored. A comparison of U–Pb bedrock and detrital zircon ages in arcs with independent calculations of volumetric magma addition rates (MARs) indicates that 100–1000 times more magmatism is added to arcs during flare-ups than during lulls. Episodic arc magmatism may result from external forcing on arc systems caused by events outside the arc and/or from internal cyclic processes driven by feedback between linked tectonic and magmatic processes within the arc. Changes and asymmetries in magmatic, tectonic, and geochemical histories provide important constraints for evaluating these poorly understood driving mechanisms. [Paterson and Ducea (2015) Elements 11: 91-98].

Current Geochemical Society members can access this issue now via the Elements online archive using your email address (UserID) and member number (Password).

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  Harry Hess Postdoctoral Research Associate in Geosciences

The Department of Geosciences at Princeton University is accepting applications for a Postdoctoral Research Associate

Featured Geochemical Career Center Jobs

New! Senior Staff Associate (Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY)

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New in GCA (v.154, 1 April 2015)
Evaluating reaction pathways of hydrothermal abiotic organic synthesis at elevated temperatures and pressures using carbon isotopes

A theoretical model of isotopic fractionation by thermal diffusion and its implementation on silicate melts

Long-term alteration of basaltic glass: Mechanisms and rates

Formation of iddingsite veins in the martian crust by centripetal replacement of olivine: Evidence from the nakhlite meteorite Lafayette

RBME coral temperature reconstruction: An evaluation, modifications, and recommendations

Effect of ionic strength on ligand exchange kinetics between a mononuclear ferric citrate complex and siderophore desferrioxamine B

Water disequilibrium in olivines from Hawaiian peridotites: Recent metasomatism, H diffusion and magma ascent rates

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New in G-Cubed (v.16, issue 2)
Re-Os isotope and platinum group elements of a FOcal ZOne mantle source, Louisville Seamounts Chain, Pacific ocean

South Aian monsoon history over the past 60 kyr recorded by radiogenic isotopes and clay mineral assemblages in the Andaman Sea

The emergence of volcanic oceanic islands on a slow-moving plate: The example of Madeira Island, NE Atlantic

Intraplate volcanism due to convective instability of stagnant slabs in the mantle transition zone

Stress drops for intermediate-depth intraslab earthquakes beneath Hokkaido, northern Japan: Differences between the subducting oceanic crust and mantle events

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Life for microbial specialists in the poisonous breath of sleeping volcanoes
Friedrich Schiller University Jena via ScienceDaily
Researchers have analyze the microbial community in volcanically active soils. In a mofette close to the Czech river Plesná in north-western Bohemia, the team found numerous organisms that were thriving in an environment which seems to be so hostile to life.
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Oxygen-depleted toxic oceans had key role in mass extinction over 200 million years ago
University of Southampton via ScienceDaily
Changes in the biochemical balance of the ocean were a crucial factor in the end-Triassic mass extinction, during which half of all plant, animal and marine life on Earth perished, according to new research.
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Missed last week's issue? See which articles your colleagues read most.

    Curiosity Rover finds biologically useful nitrogen on Mars (NASA)
Gulf Stream slower than ever before (SpaceDaily)
Possible existence of neutral atomic hydrogen in rock in Earth's deep interior (National Institute for Materials Science via ScienceDaily)

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