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Researchers: Photosynthesis has unique isotopic signature
UCLA via Phys.org
Photosynthesis leaves behind a unique calling card in the form of a chemical signature that is spelled out with stable oxygen isotopes, UCLA geochemists reported April 24 in the journal Science. The findings suggest that similar isotopic signatures could exist for many biological processes, including some that are difficult to observe with current tools.
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SOCIETY NEWS


Early registration deadline and 25 Anniversary Talks
GS
We'd like to remind you that the Early Registration deadline is June 16 and members of EAG, GS, GSJ, MSGBI, DMG, AFEQ, SFIS, SGI, SIMP, HGS and ISEB are entitled to reduced registration rates (€490 and €295 for students).

In honour of the 25th anniversary of the Goldschmidt conference, a series of 25 special anniversary talks linked to each theme will highlight the greatest achievements over the past quarter century and a vision of where the specific geochemical field may be going in the future. Look out in each theme for session 'Theme number-s'.

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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.
 


Special student events
GS
Goldschmidt2015 will feature a number of events specifically set up for students and early career scientists; some include free lunch, please sign up early.
  • The Lunchtime Seminar Program will provide students with insight, advice and answers to the various questions they may face in their career.
  • The Meet the Plenary series of lunches will allow ~20 pre-selected younger scientists per day to share lunch with the plenary speakers to discuss careers, research, opinions and vision with some of the most eminent scientists at the conference.
  • Early Career conference attendees are encouraged to sign up for the Mentoring Program in which they will be matched one-on-one with a mentor. More info for mentees.
Experienced scientists are also encouraged to sign up as Mentors. Being a mentor provides a valuable opportunity to connect with enthusiastic young scientists and other like-minded mentors. More info for mentors.

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Business office opens in Washington, DC
GS
The Geochemical Society began a new chapter May 11 with the opening of the Washington, D.C., business office. The office is located on the campus of the Carnegie Institution for Science in the northwest section of the city. Last Monday was also the first day for the Society's new Chief Operating Officer, Kevin Johnson. Kevin comes to the GS from the Association of Government Accountants, where he served as Director of Education & Research. He has also worked for the National Association of State Treasurers and holds a Master of Public Administration degree from the Maxwell School of Syracuse University. Kevin and outgoing COO Seth Davis will be working together over the next several weeks to ensure a smooth transition. The GS business office in Saint Louis, Missouri, will close on June 30.
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Featured Geochemical Career Center Jobs
GS


Postdoctoral Position in Organic Cosmochemistry at the Carnegie Institution of Washington (Washington, DC, USA)




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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New in GCA (v.157, 15 May 2015)
GS
Nitrogen isotope systematics and origins of mixed-habit diamonds

Mn–Cr dating of Fe- and Ca-rich olivine from 'quenched' and 'plutonic' angrite meteorites using Secondary Ion Mass Spectrometry

Linking high-pressure structure and density of albite liquid near the glass transition

Sulfur isotope fractionation in modern euxinic systems: Implications for paleoenvironmental reconstructions of paired sulfate–sulfide isotope records

Petrology of igneous clasts in Northwest Africa 7034: Implications for the petrologic diversity of the martian crust

Oligo-Miocene mafic intrusions of the San Juan Volcanic Field, southwestern Colorado, and their relationship to voluminous, caldera-forming magmas

Effects of aqueous uranyl speciation on the kinetics of microbial uranium reduction

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New in G-Cubed (v.16, issue 3)
GS
Temperature and velocity measurements of a rising thermal plume

The carbon-isotope signature of ultramafic xenoliths from the Hyblean Plateau (southeast Sicily, Italy): Evidence of mantle heterogeneity

Origin and evolution of the Kolbeinsey Ridge and Iceland Plateau, N-Atlantic

A comprehensive interpretative model of slow slip events on Mt. Etna's eastern flankA comprehensive interpretative model of slow slip events on Mt. Etna's eastern flank†

Source and magma mixing processes in continental subduction factory: Geochemical evidence from postcollisional mafic igneous rocks in the Dabie orogen

P and S velocity tomography of the Mariana subduction system from a combined land-sea seismic deployment

Application of the cBΩ model to the calculation of diffusion parameters of Si in silicates


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GEOCHEMISTRY IN THE NEWS


Biofuels: the right crop at the right place
Radboud University
Corn, wheat and rapeseed can be used to produce biofuels, such as bioethanol and biodiesel. According to recent findings by environmental scientists at Radboud University, the location of the agricultural lands used to grow these biofuel crops has a major impact on the greenhouse gas emission they ultimately produce.
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Study estimates quantity and form of organic carbon exported by rivers to the ocean
WHOI
Humans concerned about climate change are working to find ways of capturing excess carbon dioxide (CO2) from the atmosphere and sequestering it in the Earth. But Nature has its own methods for the removal and long-term storage of carbon, including the world's river systems, which transport decaying organic material and eroded rock from land to the ocean.
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Million-year-old bubbles reveal Antarctica's oldest climate snapshot
LiveScience
A whiff of air frozen in ice for 1 million years provides a new snapshot of Earth's ancestral climate. Scientists uncovered the ancient climate record from Antarctic blue ice. The ice core was drilled from a region called the Allan Hills, about an hour by plane from the McMurdo research station. Bubbles inside the ice are tiny windows into Earth's former atmosphere. Gases such as carbon dioxide and methane were trapped and preserved inside the bubbles when snow fell in the past.
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Study attributes varying explosivity to gaseous state within volcanic conduits
University of Plymouth via ScienceDaily
The varying scale and force of certain volcanic eruptions — currently being witnessed at sites in Chile and Mexico — are directly influenced by the levels of gaseous matter within magma inside a volcano's conduit, according to a new study.
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Historical land use an important factor for carbon cycling in northern lakes
Umeå universitet via ScienceDaily
The historical past is important when we seek to understand environmental conditions as they are today and predict how these might change in the future, according to researchers whose analyses of lake-sediment records show how lake-water carbon concentrations have varied depending on long-term natural dynamics over thousands of years, but also in response to human impacts over the past several hundred years.
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