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Earth's iron core is surprisingly weak
ScienceDaily
Researchers have used a diamond anvil cell to squeeze iron at pressures as high as 3 million times that felt at sea level to recreate conditions at the center of Earth. The findings could refine theories of how the planet and its core evolved. Through laboratory experiments, postdoctoral researcher Arianna Gleason, left, and Wendy Mao, an assistant professor of geological and environmental sciences and of photon science, determined that the iron in Earth's inner core is about 40 percent as strong as previously believed.
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PRODUCT SHOWCASE
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For decades Thermo Fisher Scientific has worked with Geoscientists helping to achieve a greater understanding of the earth and our planets. The data provided from the innovative technologies has been documented in a wide variety of literature. This knowledge is now accessible on www.thermoscientific.com/geoscience. Learn more about instruments and applications for the analysis of elements and isotopes.
 


SOCIETY NEWS


NSF, GS to award more than $54,000 to students
GS
Thanks to generous support from the National Science Foundation, the Geochemical Society, and donations from GS members, more than $54,000 (USD) will be distributed to forty-six students attending Goldschmidt2013 through the Geochemical Society's Student Travel Grant Program. This year, the program received 94 applications that were reviewed by a 24-member committee chaired by Carla Koretsky (Western Michigan University). This program was held in tandem with a travel grant program organized by the Goldschmidt2013 organizers (visit their webpage for updates on that program). This is the seventh straight year that student travel support has been provided by the NSF and we are grateful not only for their generous support over the years, but also to member contributions, and the volunteers who have served on these review committees.
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Geochemical Career Center
GS
New! PhD in Experimental Geochemistry





New! Research Associate in Isotope Geochemistry (GFZ Potsdam, Potsdam, Germany)




Postdoctoral Research Associate - Geochemistry & Interfacial Sciences (Oak Ridge National Laboratory, Oak Ridge, TN, USA)


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New in GCA (v.112, 01 July 2013)
GS
Ion-exchange reactions on clay minerals coupled with advection/dispersion processes. Application to Na+/Ca2+ exchange on vermiculite: Reactive-transport modeling, batch and stirred flow-through reactor experiments

The lithium, boron and strontium isotopic systematics of groundwaters from an arid aquifer system: Implications for recharge and weathering processes

Inverse modelling of the 14C bomb pulse in stalagmites to constrain the dynamics of soil carbon cycling at selected European cave sites

Sr/Ca profile of long-lived Tridacna gigas bivalves from South China Sea: A new high-resolution SST proxy

Texture-specific isotopic compositions in 3.4 Gyr old organic matter support selective preservation in cell-like structures

Coupled Hf–Nd–Pb isotope co-variations of HIMU oceanic island basalts from Mangaia, Cook-Austral islands, suggest an Archean source component in the mantle transition zone

A new mechanistic model of δ18O-N2O formation by denitrification

Investigating dissolved organic matter decomposition in northern peatlands using complimentary analytical techniques

Pathways of coupled arsenic and iron cycling in high arsenic groundwater of the Hetao basin, Inner Mongolia, China: An iron isotope approach

Correlating biodegradation to magnetization in oil bearing sedimentary rocks

Anaerobic oxidation of Hg(0) and methylmercury formation by Desulfovibrio desulfuricans ND132

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LATEST NEWS


Carbon holds the key to mantle redox heterogeneity
Deep Carbon Observatory
Earth's mantle is a complex and heterogeneous mixture. Understanding the chemical composition of the mantle, which comprises over 80 percent of Earth's volume, and how its activities influence our atmosphere, are crucial. In a paper released recently in Science, Elizabeth Cottrell and Katie Kelley of the Reservoirs and Fluxes community describe the central role of carbon in controlling mantle chemistry.
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Volcanoes cause climate gas concentrations to vary
ScienceDaily
Trace gases and aerosols are major factors influencing the climate. With the help of highly complex installations, such as MIPAS on board of the ENVISAT satellite, researchers try to better understand the processes in the upper atmosphere. Now, Karlsruhe Institute of Technology presents the most comprehensive overview of sulfur dioxide measurements in the journal Atmospheric Chemistry and Physics.
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Looking for similar articles? Search here, keyword VOLCANO.


New evidence supports theory of cosmic impact 12,800 years ago
DNA
About 12,800 years ago when the Earth was warming and emerging from the last ice age, a dramatic and anomalous event occurred that abruptly reversed climatic conditions back to near-glacial state. Emerging evidence continues to point to a major cosmic impact 12,800 years ago as the primary cause for the tragic loss of nearly all of the remarkable large animals that had survived the stresses of many ice age periods, including mammoths, mastodons, giant ground sloths, American camel and horse, and saber- toothed cats.
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Investigating exoplanet surfaces
Astrobiology Magazine
Numerous rocky, Earth-like worlds have been discovered by transit surveys such as the Kepler mission. For those familiar with the transit of Venus, exoplanet transits are the same idea — an exoplanet crosses the face of its parent star as perceived by observers on Earth.
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Geochemist aids development of geologic time scale for study of Earth's history
ScienceDaily
A Boise State University researcher has taken a lead role in developing the most current timetable on Earth's geologic history. Geochemist Mark Schmitz is one of four editors on The Geologic Time Scale 2012, or GTS2012, a 1,144-page compilation of the latest understanding of Earth's history, and the means by which geoscientists around the world investigate the rock record.
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TRENDING ARTICLES
Missed last week's issue? See which articles your colleagues read most.

    Billion-year-old water could hold clues to life on Earth and Mars (ScienceDaily)
Spinning the core (ScienceNews)
Atlantic coast warping like a 'magic carpet' (Science)
World's melting glaciers making large contribution to sea rise (ScienceDaily)

Don't be left behind. Click here to see what else you missed.


 

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