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Evidence against a chondritic Earth
Nature (paid subscription required)    Share    Share on FacebookTwitterShare on LinkedinE-mail article
The 142Nd/144Nd ratio of the Earth is greater than the solar ratio as inferred from chondritic meteorites, which challenges a fundamental assumption of modern geochemistry — that the composition of the silicate Earth is 'chondritic', meaning that it has refractory element ratios identical to those found in chondrites. More

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Geochemical Career Center Posting
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Faculty position in geology, low temperature geochemistry
Utah State University — Department of Geology

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MAP supported conference: Isotope Gordon Conference
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The Gordon Research Seminar and Conference on Isotopes in the Biological and Chemical Sciences met in Galveston, Texas, Feb. 5-10 this year. Two sessions focused on biogeochemistry, pollutant dynamics and geochemistry. Read more of this conference report on our website. The Geochemical Society's Meeting Assistance Program (MAP) provides up to $10,000 annually for support of geochemistry sessions/symposia at any scientific conference of geochemical relevance. Click the MAP link above for details on how to apply.

 Latest News

Call for proposals for sessions for the IMA 2014 Scientific Program
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The International Mineralogical Association (IMA) holds its General Meeting every four years, with the next one taking place in South Africa in 2014. The IMA 2014 Program Committee seeks input to design a scientific program. Please note that the deadline for submissions is Friday, September 28, 2012. This call for session proposals is a first round and the IMA is looking for broad proposals to assist with the program planning. See: and submit your proposals there. General IMA 2014 information is available at

Life's building blocks grow close to home
ScienceNews    Share    Share on FacebookTwitterShare on LinkedinE-mail article
Though life is a complicated brew, some of its ingredients can be plucked from Earth's backyard instead of being imported from more distant interstellar fields. In a new study, scientists suggest that complex organic molecules — such as the amino acids that build proteins and the ringed bases that form nucleic acids — grow on the icy dust grains that lived in the infant solar system. All it takes are high-energy ultraviolet photons to provoke the rearrangement of chemical elements in the grains' frozen sheaths. More

Life-changing experiments: The biological Higgs
Nature    Share    Share on FacebookTwitterShare on LinkedinE-mail article
Biologists may have little cause to envy physicists — they generally enjoy more generous funding, more commercial interest and more popular support. But they could have been forgiven a moment of physics envy last December when, after a week of build-up and speculation, researchers at the Large Hadron Collider near Geneva in Switzerland addressed a tense, standing-room-only auditorium. More

ScienceShot: Thin air
Science    Share    Share on FacebookTwitterShare on LinkedinE-mail article
Early in Earth's history, the sun was about 20 percent dimmer than it is now. Climate models suggest that our planet should have been frozen over at the time, yet there is geological evidence for liquid water aplenty — a disparity that planetary scientists have dubbed the faint young sun paradox. More

Western Arctic Ocean freshwater storage increased by wind-driven spin-up of the Beaufort Gyre
Nature Geoscience (paid subscription required)    Share    Share on FacebookTwitterShare on LinkedinE-mail article
The Arctic Ocean's freshwater budget comprises contributions from river runoff, precipitation, evaporation, sea-ice and exchanges with the North Pacific and Atlantic. More than 70,000 km of freshwater are stored in the upper layer of the Arctic Ocean, leading to low salinities in upper-layer Arctic sea water, separated by a strong halocline from warm, saline water beneath. More

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