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Newly found gene may help bacteria survive in extreme environments
MIT News Office    Share    Share on FacebookTwitterShare on LinkedinE-mail article
In the days following the 2010 Deepwater Horizon oil spill, methane-eating bacteria bloomed in the Gulf of Mexico, feasting on the methane that gushed, along with oil, from the damaged well. The sudden influx of microbes was a scientific curiosity: Prior to the oil spill, scientists had observed relatively few signs of methane-eating microbes in the area. More

 Society News

Recent Geochemical Career Center postings
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Analytical Fluid Geochemist (GNS Science, Lower Hutt, New Zealand)

Harry S. Truman Fellowship In National Security Science and Engineering (Sandia National Lab, Albuquerque, NM, USA)

Assistant/Associate Professor in Global Change Oceanography (University of South Carolina, Columbia, SC, USA)

Assistant Professor in Sedimentary Systems Geology (University of South Carolina, Columbia, SC, USA)

Assistant Professor in Aqueous Geochemistry/ Biogeochemistry (University of South Carolina, Columbia, SC, USA)

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New in GCA (v.91, 15 August 2012)
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Heterogeneous oxidation of Fe(II) on iron oxides in aqueous systems: Identification and controls of Fe(III) product formation

Si isotope variability in Proterozoic cherts

Differences in the immobilization of arsenite and arsenate by calcite

Modelling CO2 degassing from small acidic rivers using water pCO2, DIC and δ13C-DIC data

Distribution and speciation of trace elements in iron and manganese oxide cave deposits

Use of microfocused X-ray techniques to investigate the mobilization of arsenic by oxalic acid

Reaction of water-saturated supercritical CO2 with forsterite: Evidence for magnesite formation at low temperatures

Sulfur geochemistry of peridotite-hosted hydrothermal systems: Comparing the Ligurian ophiolites with oceanic serpentinites

Jarosite dissolution rates and nanoscale mineralogy

 Latest News

First European Mineralogical Conference
European Mineralogical Conference    Share    Share on FacebookTwitterShare on LinkedinE-mail article
The upcoming European Mineralogical Conference will be the first joint conference of ten European mineralogical societies, fostering an exchange of new mineralogical and geochemical research between the European countries. The conference will be held Sept. 2-6, 2012 at Johann Wolfgang Goethe-University, Frankfurt, Germany. The online registration deadline is Aug. 15, 2012.

Late accretion as a natural consequence of planetary growth
Nature Geoscience (subscription required)    Share    Share on FacebookTwitterShare on LinkedinE-mail article
Core formation should strip highly siderophile elements (HSEs) from planetary mantles according to the expected metal–silicate partition coefficients. However, studies of Earth, the Moon and Mars indicate mantles with HSE abundances in chondrite-relative proportions that exceed the values expected from metal–silicate partitioning. More

Unradiogenic lead in Earth's upper mantle
Nature Geoscience    Share    Share on FacebookTwitterShare on LinkedinE-mail article
The mantle and continental crust — Earth's main silicate reservoirs — have a lead isotope composition that is too radiogenic to have evolved from primitive Solar System material over 4.57 billion years. More

Pronounced interannual variability in tropical South Pacific temperatures during Heinrich Stadial 1
Nature    Share    Share on FacebookTwitterShare on LinkedinE-mail article
The early last glacial termination was characterized by intense North Atlantic cooling and weak overturning circulation. This interval between ~18,000 and 14,600 years ago, known as Heinrich Stadial 1, was accompanied by a disruption of global climate and has been suggested as a key factor for the termination. However, the response of interannual climate variability in the tropical Pacific (El Niño-Southern Oscillation) to Heinrich Stadial 1 is poorly understood. More

X-rays probe the origins of hotspot volcanoes
Physics World    Share    Share on FacebookTwitterShare on LinkedinE-mail article
Researchers in France have added a new twist to one of the most controversial debates in geophysics – how "hotspot" volcanoes such as the Hawaiian Islands are formed. By probing hot, pressurized rock samples with intense X-rays, they have shown that molten rock deep within the Earth's mantle should be buoyant. This finding, the researchers say, supports the much-debated hypothesis that hotspot volcanoes are created by deep plumes of rock rising almost 3000 km to the Earth's surface. More


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