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NASA's Curiosity lands on Mars
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The Mars Science Laboratory including the Curiosity rover landed successfully in Gale Crater on the surface of Mars. Two hours later, the first high resolution images of the landing site were transmitted back to Earth. Read past GN coverage of the MSL Mission. More

 Society News

Upcoming GS Associated Meeting
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The abstract deadlines for the AGU Fall Meeting and the GSA Annual Meeting are Aug. 8 and 15 respectively. At the GSA meeting, the Geochemical Society will again be sponsoring a reception with MSA and the GSA-MGPV division, as well as welcoming attendees to our exhibit (Booth 806).

An incentive for new members
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Do you know a student or peer who is not a current member of the Geochemical Society? Please encourage them to join! From now through Sept. 25, 2012 new and lapsed members who join for the 2013 calendar year will also receive both the October 2012 and December 2012 issues of Elements magazine, including access to the online Elements archive back to volume one, issue one.

Recent Geochemical Career Center postings
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Environmental Earth Sciences Faculty Position (University of Notre Dame, South Bend, IN, USA)

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)

Job Seekers: It only takes a few minutes to create an account to apply for jobs. Sign up now for access to all the great features on Geochemical Career Center.

Employers: For a nominal fee (a single 60-day post is 250 USD), the link to your post will be distributed in future issues of Geochemical News – reaching over 4,000 subscribers and also on our Facebook page with over 960 likes. Through Aug. 31, use promotion code GNEWS20 to take 20 percent off your order.

New in GCA (v.92, 1 September 2012)
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Sulfur, iron-, and calcium cycling associated with natural electric currents running through marine sediment

A numerical model to estimate trapping conditions of fluid inclusions that homogenize by halite disappearance

Climate and cave control on Pleistocene/Holocene calcite-to-aragonite transitions in speleothems from Morocco: Elemental and isotopic evidence

Pertechnetate (TcO4−) reduction by reactive ferrous iron forms in naturally anoxic, redox transition zone sediments from the Hanford Site, USA

Tc(VII) reduction kinetics by titanomagnetite (Fe3−xTixO4) nanoparticles

Microbial utilization of abiogenic carbon and hydrogen in a serpentinite-hosted system

Atomic-level studies of the depletion in reactive sites during clay mineral dissolution

Experimental determination of H2O–NaCl liquidi to 25 mass% NaCl and 1.4 GPa: Application to the Jovian satellite Europa

Micrometer-scale chemical and isotopic criteria (O and Si) on the origin and history of Precambrian cherts: Implications for paleo-temperature reconstructions

Extended chronologies of aqueous alteration in the CM2 carbonaceous chondrites: Evidence from carbonates in Queen Alexandra Range 93005

 Latest News

1 in 5 streams damaged by mine pollution in southern West Virginia
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Water pollution from surface coal mining has degraded more than 22 percent of streams and rivers in southern West Virginia to the point they may now qualify as impaired under state criteria, according to a new study by scientists at Duke and Baylor. More

Tropical climate in the Antarctic: Palm trees once thrived on today's icy coasts 52 million years ago
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Given the predicted rise in global temperatures in the coming decades, climate scientists are particularly interested in warm periods that occurred in the geological past. Knowledge of past episodes of global warmth can be used to better understand the relationship between climate change, variations in atmospheric carbon dioxide and the reaction of Earth's biosphere. More

Global rates of water-column denitrification derived from nitrogen gas measurements
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Biologically available nitrogen (N) limits phytoplankton growth over much of the ocean. The rate at which N is removed from the contemporary ocean by denitrifying bacteria is highly uncertain. More

The great drying strikes again
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The drought of 2012 keeps getting worse. On July 26, the federal government reported that more than two-thirds of the continental U.S. is drier than normal, with 20 percent of the country in one of the two most extreme stages of drought, up from just 7 percent a week before. In key agricultural states like Illinois, the situation is dire: nearly three-quarters of that corn-producing region's land is in exceptional or extreme drought. More

Nitrogen loss from soil through anaerobic ammonium oxidation coupled to iron reduction
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The oxidation of ammonium is a key step in the nitrogen cycle, regulating the production of nitrate, nitrous oxide and dinitrogen. In marine and freshwater ecosystems, anaerobic ammonium oxidation coupled to nitrite reduction, termed anammox, accounts for up to 67 percent of dinitrogen production. More

Meteorite craters in Australia
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Exploring his vast cattle station in 1899, Walter Parke came upon a feature in the landscape he could not explain. A 15m-deep, bowl-shaped depression, larger than a football field, had been gouged out of the Central Australian desert. "One of the most curious spots I have ever seen in the country," he wrote in a letter to the anthropologist Frank Gillen. "An immense amphitheatre. To look at it I cannot but think it has been done by human agency, but when or why, goodness knows." More

Tissint meteorite helps build Museum Martian library in London
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It may sound like a place where Martians sit and read books, but the Natural History Museum's Martian library in London is in fact a database of Martian meteorites, which has had a huge boost with the arrival of the Tissint meteorite. More


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