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Geomicrobiologists show how microbial fossils resist the conditions of rock formation
Nature Communications via
Since life originated on Earth between 3.8 and 3.9 Ga ago, microorganisms have significantly shaped and influenced the chemistry of Earth's surface and subsurface environments. Reconstructing the evolution of early microbial life depends mainly on finding organic and mineral remnants of microbial activity preserved in the rock record. Even when microfossils are found, there are often controversies about their biological origin, since parameters that lead to a good preservation of microfossils are not well constrained.
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Final Call for DSA Nominations
Nominations for the Distinguished Service Award are accepted from all members and volunteers including the Board of Directors. The award is intended to recognize and document outstanding service to the Geochemical Society and/or the geochemical community that greatly exceeds the normal expectations of voluntary service. To be considered for 2015, nominations must be submitted to the business office by March 6. Please visit our DSA webpage for more information on the award and nomination requirements.
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Seeking photos of first Goldschmidt conferences
Goldschmidt2015 will celebrate its 25th Anniversary and we are looking for photos of past Goldschmidt conferences (organizers, plenaries, delegates, cover pages of programs, etc,...), especially prior to 2006. If you have any, please contact
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  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 Pittcon 2015 in New Orleans, Booth 842.

Geochemical Career Center

Postdoctoral Fellowships in Applied Geochemistry (MAGNET, Nationwide, Canada)

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.150, 1 FEBRUARY 2015)
Fe-isotope fractionation in magmatic-hydrothermal mineral deposits: A case study from the Renison Sn–W deposit, Tasmania

Characterization of boron incorporation and speciation in calcite and aragonite from co-precipitation experiments under controlled pH, temperature and precipitation rate

Precise calibration of equilibrium oxygen isotope fractionations between dissolved phosphate and water from 3 to 37 °C

Lower crustal assimilation in oceanic arcs: Insights from an osmium isotopic study of the Lesser Antilles

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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

New in G-Cubed (v.16, issue 1)
Effects of crystal shape- and size-modality on magma rheology

Oxygen isotope thermometry, speedometry, and hygrometry: Apparent equilibrium temperature versus closure temperature

The mantle transition zone beneath West Antarctica: Seismic evidence for hydration and thermal upwellings

Long-term evolution of an Oligocene/Miocene maar lake from Otago, New Zealand

Paleolatitudes of the Tibetan Himalaya from primary and secondary magnetizations of Jurassic to Lower Cretaceous sedimentary rocks

Bulk particle size distribution and magnetic properties of particle-sized fractions from loess and paleosol samples in Central Asia

Rock magnetism of tiny exsolved magnetite in plagioclase from a Paleoarchean granitoid in the Pilbara craton

Magmatic plumbing at Lucky Strike volcano based on olivine-hosted melt inclusion compositions

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Understanding the copper heart of volcanoes
University of Bristol
The link between volcanism and the formation of copper ore has been discovered by researchers from the University of Bristol. Their findings, published in Nature Geoscience, could have far-reaching implications for the search for new copper deposits.
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Greenland is melting — the past might tell what the future holds
University of Copenhagen
A team of scientists lead by Danish geologist Nicolaj Krog Larsen have managed to quantify how the Greenland Ice Sheet reacted to a warm period 8,000-5,000 years ago. Back then temperatures were 2-4 degrees C warmer than present. Their results have just been published in the scientific journal Geology, and are important as we are rapidly closing in on similar temperatures.
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Call for AGU Honor Nominations
Receiving an AGU Honor is an esteemed recognition for those who have made profound contributions and breakthrough achievements in the Earth and space sciences. Now is the time to nominate a student, colleague, peer, or mentor whose achievements have made a difference in the Earth and space sciences. Nominations for Union Awards, Medals, & Prizes and for Union Fellows are being accepted through March 15. Additional information about nominating for an AGU award is available on AGU's website.
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Missed last week's issue? See which articles your colleagues read most.

    Ancient rocks show life could have flourished on Earth 3.2 billion years ago (University of Washington via EurekAlert)
Ancient shells offer evidence of how Ice Age ended (Climate News Network)

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


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