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Winters in Siberian permafrost regions have warmed since millennia
Alfred Wegener Institute
For the first time, researchers at the Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research have successfully employed a geochemical method used in glacier research to decode climate data from millennia-old permafrost ground ice and reconstruct the development of winter temperatures in Russia's Lena River Delta. Their conclusions: Over the past 7,000 years, winter temperatures in the Siberian permafrost regions have gradually risen.
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ELEMENTS: Mineralogy of Mars
The February issue of Elements magazine (volume 11, issue 1) is in press. "The Mars Science Laboratory (MSL) rover Curiosity was designed and built to explore the surface of Mars and characterize its modern environment. Its primary objective was to search for ancient habitable environments. During its nominal one-Mars-year mission (23 Earth months), Curiosity drilled and scooped samples, made mineralogical, isotopic, and compositional measurements, took hundreds of thousands of images that provided geologic context for samples, and acquired millions of observations of the modern environment. Curiosity is the most advanced mobile geochemistry laboratory to have ever roved another planet, and it has been very productive. Within 8 months of landing, scientists were able to confirm mission success with evidence of an ancient habitable environment on Mars. This issue presents the range of discoveries related to the investigations of the solid materials at Gale Crater and elsewhere on Mars." [Grotzinger et al. (2015) Elements 11:19-26]

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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Geochemical Career Center

Chief Operating Officer (Geochemical Society via the Carnegie Institution, Washington, DC, USA)

Postdoctoral Fellowships in Applied Geochemistry (MAGNET, Nationwide, Canada)

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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

New in GCA (v.149, 15 January 2015)
The magnesium isotope (δ26Mg) signature of dolomites

Mass-dependent sulfur isotope fractionation during reoxidative sulfur cycling: A case study from Mangrove Lake, Bermuda

Carbon dioxide solubility in aqueous solutions of sodium chloride at geological conditions: Experimental results at 323.15, 373.15, and 423.15 K and 150 bar and modeling up to 573.15 K and 2000 bar

Peat formation concentrates arsenic within sediment deposits of the Mekong Delta

Classification of hydrous meteorites (CR, CM and C2 ungrouped) by phyllosilicate fraction: PSD-XRD modal mineralogy and planetesimal environments

The chemical conditions of the late Archean Hamersley basin inferred from whole rock and pyrite geochemistry with Δ33S and δ34S isotope analyses

Cation diffusion in the interlayer space of swelling clay minerals — A combined macroscopic and microscopic study

Bacterial exudate effects on Cu2+ sorption by cells: Quantifying significant ternary interactions

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New in G-Cubed (v.15, issue 12)
The effects of alteration and porosity on seismic velocities in oceanic basalts and diabases

Sensitivity experiments on True Polar Wander

Lifting the cover of the cauldron: Convection in hot planets

Influence of late Pleistocene glaciations on the hydrogeology of the continental shelf offshore Massachusetts, USA

FORCulator: A micromagnetic tool for simulating first-order reversal curve diagrams

Development and evolution of detachment faulting along 50 km of the Mid-Atlantic Ridge near 16.5°N

Crustal structure beneath the Rif Cordillera, North Morocco, from the RIFSIS wide-angle reflection seismic experiment

A Cenozoic uplift history of Mexico and its surroundings from longitudinal river profiles

Imaging methane hydrates growth dynamics in porous media using synchrotron X-ray computed microtomography

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Carbon sequestration on shaky ground
MIT News Office
Carbon sequestration promises to address greenhouse-gas emissions by capturing carbon dioxide from the atmosphere and injecting it deep below the Earth's surface, where it would permanently solidify into rock. The U.S. Environmental Protection Agency estimates that current carbon-sequestration technologies may eliminate up to 90 percent of carbon dioxide emissions from coal-fired power plants. While such technologies may successfully remove greenhouse gases from the atmosphere, researchers in the Department of Earth, Atmospheric and Planetary Sciences at MIT have found that once injected into the ground, less carbon dioxide is converted to rock than previously imagined.
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Labyrinths as crucibles of life
Ludwig-Maximilians University
Water-filled micropores in hot rock may have acted as the nurseries in which life on Earth began. An LMU team has now shown that temperature gradients in pore systems promote the cyclical replication and emergence of nucleic acids.
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Where did the missing oil go? New study says some is sitting on Gulf floor
Florida State University
After 200 million gallons of crude oil spilled into the Gulf of Mexico in April 2010, the government and BP cleanup crews mysteriously had trouble locating all of it. Now, a new study led by Florida State University Professor of Oceanography Jeff Chanton finds that some 6 million to 10 million gallons are buried in the sediment on the Gulf floor, about 62 miles southeast of the Mississippi Delta.
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Missed last week's issue? See which articles your colleagues read most.

    Melting glaciers have big carbon impact, study shows (Florida State University)
Getting to know Rosetta's comet (ESA)
Our oceans give new insights on elements made in supernovae (The Conversation)

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