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How did the Earth's continents form? Scientists move big step closer to solving mystery
The Huffington Post
How did Earth's continents form? That's one of geoscience's deepest mysteries, but now researchers may be a big step closer to solving it — after gaining a new understanding of the process that creates the continental crust, which makes up the land masses on which we live.
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SOCIETY NEWS


Featured Geochemical Career Center Jobs
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Senior Staff Associate (Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY)


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

Employers: All jobs posted in the Geochemical Career Center are cross-promoted through Facebook, Twitter and right here in Geochemical News.

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PRODUCT SHOWCASE
  Analab Corrosion Resistant Laboratory Appliances

Analab manufacture corrosion resistant laboratory appliances such as acid vapour cleaning stations, hotplates, and sample preparation devices. Our devices can be used with a wide range of acids and bases (HF to NH4OH). We are represented in North America by Isomass Scientific.

Please visit us at Goldschmidt Aug 16 – 21/15 in Prague.
 


New in GCA (v.154, 1 April 2015)
GS
Identification and carbon isotope composition of a novel branched GDGT isomer in lake sediments: Evidence for lacustrine branched GDGT production

Processes and time scales of magmatic evolution as revealed by Fe–Mg chemical and isotopic zoning in natural olivines

Modeling of the structure-specific kinetics of abiotic, dark reduction of Hg(II) complexed by O/N and S functional groups in humic acids while accounting for time-dependent structural rearrangement

Crystal chemical constraints on inter-mineral Fe isotope fractionation and implications for Fe isotope disequilibrium in San Carlos mantle xenoliths

The sedimentary flux of dissolved rare earth elements to the ocean

Formation of CO2, H2 and condensed carbon from siderite dissolution in the 200–300 °C range and at 50 MPa

Environmental factors affecting the low temperature isomerization of homohopanes in acidic peat deposits, central China

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  Harry Hess Postdoctoral Research Associate in Geosciences

The Department of Geosciences at Princeton University is accepting applications for a Postdoctoral Research Associate
 


Conference Calendar May deadlines
GS
Abstract Deadlines
May 1: 22nd International Symposium for Environmental Biogeochemistry (Slovenia)
May 10: Gordon Research Conference: Interior of the Earth (USA)
May 13: Annual Meeting of the Meteoritical Society (USA)
May 17: Gordon Research Conference: Catchment Science: Interactions of Hydrology, Biology & Geochemistry (USA)
May 31: 8th European Conference on Mineralogy and Spectroscopy (ECMS 2015) (Italy)

Registration Deadlines
May 1: 9th International Conference on the Analysis of Geological and Environmental Materials (Austria)
May 12: Japan Geoscience Union Meeting 2015 (Japan)
May 18: Astrobiology Science Conference 2015 (USA)
May 31: Annual Meeting of the American Crystallographic Association (USA)
May 31: 13th SGA Biennial Meeting. Mineral Resources in a Sustainable World (France)
May 31: 8th European Conference on Mineralogy and Spectroscopy (ECMS 2015) (Italy)
May 31: 8th Hutton Symposium on Granites and Related Rocks (Brazil)

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GEOCHEMISTRY IN THE NEWS


Measurement of first ionization potential of lawrencium reignites debate over periodic table
Nature via Phys.org
A team of researchers with member affiliations from across the globe has succeeded in conducting a measurement of the first ionization potential of lawrencium. In their paper published in the journal Nature, the team describes how they achieved the feat and what they believe it means for placement on the Periodic Table of Elements. Andreas Türler of the University of Bern offers a News & Views perspective piece on the work done by the team in the same issue.
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Study: Greatest mass extinction driven by acidic oceans
University of Edinburgh via ScienceDaily
Changes to the Earth's oceans, caused by extreme volcanic activity, triggered the greatest extinction of all time, a study suggests. The amount of carbon added to the atmosphere that triggered the mass extinction was probably greater than today's fossil fuel reserves, the team says. However, the carbon was released at a rate similar to modern emissions. This fast rate of release was a critical factor driving ocean acidification, researchers say.
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Swirling currents deliver phytoplankton carbon to ocean depths
Science via Phys.org
Just as crocus and daffodil blossoms signal renewal and the start of a warmer season on land, a similar "greening" event — a massive phytoplankton bloom — unfolds each spring in the Atlantic Ocean from Bermuda to the Arctic. But, what happens to all that organic material produced in the surface ocean?
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Panama debate fueled by zircon dating: Americas connected earlier than thought
Science via Phys.org
New evidence published in Science by Smithsonian geologists dates the closure of an ancient seaway at 13 to 15 million years ago and challenges accepted theories about the rise of the Isthmus of Panama and its impact on world climate and animal migrations.
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TRENDING ARTICLES
Missed last week's issue? See which articles your colleagues read most.

    New study shows bacteria can use magnetic particles to create a 'natural battery' (European Association of Geochemistry)
Oxygen-depleted toxic oceans had key role in mass extinction over 200 million years ago (University of Southampton via ScienceDaily)
Life for microbial specialists in the poisonous breath of sleeping volcanoes (Friedrich Schiller University Jena via ScienceDaily)

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


 

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