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Geochemist uses helium and lead isotopes to gain insight into the makeup of the planet's deep interior
Phys.org
A University of California, Santa Barbara, geochemist studying Samoan volcanoes has found evidence of the planet's early formation still trapped inside the Earth. Known as hotspots, volcanic island chains such as Samoa can ancient primordial signatures from the early solar system that have somehow survived billions of years.
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SOCIETY NEWS


Final call for 2015 Award Nominations
GS
The Oct. 31 deadline for 2015 Award Nominations is closing in. Thank you to those who have already submitted nominations or are in the final preparations, your nominations are invaluable to the process. If you haven't participated yet, please take the time to consider the accomplishments of your valued colleagues by nominating them. With your help, we can ensure the award committees have a diverse and deserving pool of candidates to consider. Your participation in the awards program by being a nominator or by writing a supporting letter of recommendation not only benefits the nominee, it also benefits the geochemical community.
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PRODUCT SHOWCASE
  Analab Corrosion Resistant Laboratory Appliances

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Please visit us at GSA 2014 in Vancouver, Booth 1018.
 


Geochemical Career Center
GS


Postdoctoral Research Assistant in Geochemistry (University of Oxford, Oxford, United Kingdom)




Postdoctoral Research Associate in Aquatic Biogeochemistry (University of Florida, Gainesville, FL, USA)




Postdoctoral Appointee (Argonne National Laboratory, Lemont, IL, USA)




Tenure-Track Assistant Professor of Hydrogeology (Georgia State University, Atlanta, GA, USA)




Faculty Positions in Geophysical Sciences (University of Chicago, Chicago, IL, USA)




Hamilton Professor of Earth Sciences (Southern Methodist University, Dallas, TX, USA)




Assistant Professor SIMS (The University of Western Australia, Crawley, Australia)




Senior Research Officer SIMS (The University of Western Australia, Crawley, Australia)




Assistant Professor/Associate Professor/Professor SIMS (The University of Western Australia, Crawley, Australia)




Postdoctoral Research Associate (Gemological Institute of America, Carlsbad, CA USA)




CPS Postdoctoral Fellowships in Planetary/ Exoplanet Science (University of Toronto, Toronto, Canada)




Research Associate (Macquarie University, Sydney, Australia)




Inductively Coupled Plasma Mass Spectroscopist/Engineeer (Aarhus University, Aarhus, Denmark)




Assistant Professor of Earth and Planetary Sciences (Washington University in St. Louis, Saint Louis, MO, USA)




Tenure-Track Faculty Position in Chemistry of Earth Materials (University of Southern California, Los Angeles, CA, USA)


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

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New in GCA (v.142, 1 Oct 2014)
GS
Sulfur isotope mass-independent fractionation in impact deposits of the 3.2 billion-year-old Mapepe Formation, Barberton Greenstone Belt, South Africa

Very long hillslope transport timescales determined from uranium-series isotopes in river sediments from a large, tectonically stable catchment

The effects of diagenesis and dolomitization on Ca and Mg isotopes in marine platform carbonates: Implications for the geochemical cycles of Ca and Mg

Reconstructing C3 and C4 vegetation cover using n-alkane carbon isotope ratios in recent lake sediments from Cameroon, Western Central Africa

Sulfur isotope fractionation between fluid and andesitic melt: An experimental study

Isotopic and structural signature of experimentally irradiated organic matter

Strontium complexation in aqueous solutions and silicate glasses: Insights from high energy-resolution fluorescence detection X-ray spectroscopy and ab-initio modeling

Compound specific amino acid δ15N in marine sediments: A new approach for studies of the marine nitrogen cycle

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New in G-Cubed (v.15, issue 9)
GS
Metasomatized ancient lithospheric mantle beneath the young Zealandia microcontinent and its role in HIMU-like intraplate magmatism

Nd and Sr isotope compositions of different phases of surface sediments in the South Pacific: Extraction of seawater signatures, boundary exchange, and detrital/dust provenance

Reconciling mantle attenuation-temperature relationships from seismology, petrology, and laboratory measurements

Tectonic structure, lithology, and hydrothermal signature of the Rainbow massif (Mid-Atlantic Ridge 36°14′N)

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GEOCHEMISTRY IN THE NEWS


Earth's magnetic field could flip within a lifetime
University of California, Berkeley
Imagine the world waking up one morning to discover that all compasses pointed south instead of north. It's not as bizarre as it sounds. Earth's magnetic field has flipped — though not overnight — many times throughout the planet's history. Its dipole magnetic field, like that of a bar magnet, remains about the same intensity for thousands to millions of years, but for incompletely known reasons it occasionally weakens and, presumably over a few thousand years, reverses direction.
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Mature forests store nitrogen in soil: May help protect waterways from excess nitrogen from industry
Ecological Society of America via ScienceDaily
Ecologists working in central Pennsylvania forests have found that forest top soils capture and stabilize the powerful fertilizer nitrogen quickly, within days, but release it slowly, over years to decades. The discrepancy in rates means that nitrogen can build up in soils. Forests may be providing an unappreciated service by storing excess nitrogen emitted by modern agriculture, industry, and transport before it can cause problems for our waterways.
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Pre-AGU 2014 CIDER Workshop

This one-day workshop serves as a kick-off for the CIDER 2015 summer program and as a retrospective on the CIDER 2014 summer program. It will be held Dec. 14, just before AGU in Berkeley, California. The workshop is open to all, and we particularly encourage those that have not experienced CIDER but would like to find out more about it. The registration deadline is Nov. 12.
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TRENDING ARTICLES
Missed last week's issue? See which articles your colleagues read most.

    Carbonate rocks are unrecognized methane sink (Oregon State University)
Scientists find ancient mountains that fed early life (Australian National University via ScienceDaily)

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


 

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