This message contains images. If you don't see images, click here to view.
Click here to advertise in this news brief.

  Mobile version   RSS   Subscribe   Unsubscribe   Archive   Media Kit May. 28, 2013

Home   Join   Goldschmidt 2013   Career Center   GN Archive


Earth's iron core is surprisingly weak
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.
   Share this article:   Share on FacebookTwitterShare on LinkedinE-mail article

  Visit the Geosciences Knowledge Library

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 Learn more about instruments and applications for the analysis of elements and isotopes.


NSF, GS to award more than $54,000 to students
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.
Share this article:   Share on FacebookTwitterShare on LinkedinE-mail article

Geochemical Career Center
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)

Job Seekers: View current openings | Post your resume | Career resources

Employers: All jobs posted in the Geochemical Career Center are cross-promoted through our Facebook page and right here in Geochemical News. Through June 28, take 20 percent off all GCC packages.

Share this article:   Share on FacebookTwitterShare on LinkedinE-mail article

New in GCA (v.112, 01 July 2013)
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

Share this article:   Share on FacebookTwitterShare on LinkedinE-mail article


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.
Share this article:   Share on FacebookTwitterShare on LinkedinE-mail article

Volcanoes cause climate gas concentrations to vary
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.
Share this article:   Share on FacebookTwitterShare on LinkedinE-mail article
Looking for similar articles? Search here, keyword VOLCANO.

New evidence supports theory of cosmic impact 12,800 years ago
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.
Share this article:   Share on FacebookTwitterShare on LinkedinE-mail article

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.
Share this article:   Share on FacebookTwitterShare on LinkedinE-mail article

Geochemist aids development of geologic time scale for study of Earth's history
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.
Share this article:   Share on FacebookTwitterShare on LinkedinE-mail article

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.


Geochemical News
Geochemical Society Content Editors: Martin Elsner, Shuhei Ono,
Lesley Warren, and Helen Williams   
Contribute news

For MultiBriefs:
Colby Horton, Vice President of Publishing, 469.420.2601
Download media kit

Tammy Gibson, Content Editor, 469.420.2677   
Contribute news

This edition of Geochemical News was sent to ##Email##. To unsubscribe, click here. Did someone forward this edition to you? Subscribe here -- it's free!
Recent Issues
May 28, 2013
May 21, 2013
May 14, 2013
May 7, 2013

7701 Las Colinas Ridge, Ste. 800, Irving, TX 75063