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Scientists find clues of plate tectonics on Mars
Universe Today    Share    Share on FacebookTwitterShare on LinkedinE-mail article
Until now, Earth was thought to be the only planet with plate tectonics. But a huge "crack" in Mars' surface — the massive Valles Marinaris — shows evidence of the movement of huge crustal plates beneath the planet's surface, meaning Mars may be showing the early stages of plate tectonics. This discovery can perhaps also shed light on how the plate tectonics process began here on Earth. More

 Society News

2012 Ingerson lecturer selected
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Dr. Isabel Montanez (University of California – Davis) will present the 2012 F. Earl Ingerson Lecture at the upcoming Annual GSA meeting in Charlotte, N.C., from Nov. 4-7. Her lecture is entitled "Modern soil system constraints on reconstructing deep-time atmospheric CO2: A new view of phanerozoic PCO2". The Ingerson lecture, one of only two named lectures awarded by the Geochemical Society, is presented annually at the GSA Meeting. Montanez's lecture will be one of the 267 geochemically-oriented presentations submitted to GSA. Besides these talks/posters of geochemical interest, the Geochemical Society will again be sponsoring a ticketed reception with MSA and the GSA-MGPV division, as well as welcoming attendees to our exhibit
(Booth 806).

An incentive for new members
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Faculty: With new students coming back this fall, now is a great time to encourage them to join and become involved in the global geochemical community. As an extra incentive, all new memberships received before Sept. 25, 2012, will receive two bonus issues of Elements magazine the October 2012 (Theme: Rare Earth Elements), and the December 2012 (Theme: Urban Geochemistry). We have an easy to use, secure online form for membership at Student membership is only US$10.

Recent Geochemical Career Center postings

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NEW! Faculty Positions in Continental Margins and Coastal Environments (Scripps Institution of Oceanography, San Diego, CA, USA)

Post Doc Appointee – Geochemistry (Sandia National Lab, Albuquerque, NM, USA)

Environmental Earth Sciences Faculty Position (University of Notre Dame, South Bend, IN, USA)

Assistant Professor in Aqueous Geochemistry/ Biogeochemistry (University of South Carolina, Columbia, SC, USA)

Assistant Professor in Sedimentary Systems Geology (University of South Carolina, Columbia, SC, USA)

Analytical Fluid Geochemist (GNS Science, Lower Hutt, New Zealand)

Harry S. Truman Fellowship In National Security Science and Engineering (Sandia National Lab, Albuquerque, NM, USA)

Assistant/Associate Professor in Global Change Oceanography (University of South Carolina, Columbia, SC, USA)

Job Seekers: It only takes a few minutes to create an account to apply for jobs. Sign up now for access to all the great features on Geochemical Career Center.

Employers: For a nominal fee (a single 60-day post is 250 USD), the link to your post will be distributed in future issues of Geochemical News – reaching over 4,000 subscribers and also on our Facebook page with over 975 likes. Through Aug. 31, use promotion code GNEWS20 to take 20 percent off your order.

New in GCA (v.94, 1 October 2012)
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Absolute acidity of clay edge sites from ab-initio simulations

Incorporation of magnesium into fish otoliths: Determining contribution from water and diet

Sources and input mechanisms of hafnium and neodymium in surface waters of the Atlantic sector of the Southern Ocean

Spatial distribution of dissolved neodymium and εNd in the Bay of Bengal: Role of particulate matter and mixing of water masses

Rare earth element association with foraminifera

Biogenic and pedogenic controls on Si distributions and cycling in grasslands of the Santa Cruz soil chronosequence, California

Dissolved Organic Matter in Headwater Streams: Compositional Variability across Climatic Regions of North America

Reconstruction of palaeoinfiltration during the Holocene using porewater data (Laxemar, Sweden)

Role of structural Fe in nontronite NAu-1 and dissolved Fe(II) in redox transformations of arsenic and antimony

Oxygen isotope variation in primitive achondrites: The influence of primordial, asteroidal and terrestrial processes

Insights into crustal assimilation by Icelandic basalts from boron isotopes in melt inclusions from the 1783–1784 Lakagígar eruption

Varied crystallization conditions for Neogene sepiolite and associated Mg-clays from Madrid Basin (Spain) traced by oxygen and hydrogen isotope geochemistry

An experimental study of the elemental and isotopic fractionation of copper between aqueous vapour and liquid to 450 °C and 400 bar in the CuCl–NaCl–H2O and CuCl–NaHS–NaCl–H2O systems

 Latest News

Life's first taste of phosphorus
Astrobiology Magazine    Share    Share on FacebookTwitterShare on LinkedinE-mail article
Despite its impressive biological resume, phosphorus is relatively inaccessible as elements go. To understand how phosphorus obtained its prominent role, scientists are modeling the early geochemical environment on Earth and in space. More

Past tropical climate change linked to ocean circulation
Texas A&M University    Share    Share on FacebookTwitterShare on LinkedinE-mail article
A new record of past temperature change in the tropical Atlantic Ocean's subsurface provides clues as to why the Earth's climate is so sensitive to ocean circulation patterns, according to climate scientists at Texas A&M University. More

Long-term decline of global atmospheric ethane concentrations and implications for methane
Nature (subscription required)    Share    Share on FacebookTwitterShare on LinkedinE-mail article
After methane, ethane is the most abundant hydrocarbon in the remote atmosphere. It is a precursor to tropospheric ozone and it influences the atmosphere's oxidative capacity through its reaction with the hydroxyl radical, ethane's primary atmospheric sink. Here we present the longest continuous record of global atmospheric ethane levels. More

Unless drastic protection policies are put in place marine species are at risk
redOrbit    Share    Share on FacebookTwitterShare on LinkedinE-mail article
If the levels of carbon dioxide continue to increase many marine species will be harmed or won't survive. It is doubtful that the current protection policies and management practices will be enough to save them. If various marine species are to survive, unconventional, non-passive methods to conserve marine ecosystems need to be considered. More

Vanished Brazilian Atlantic Forest still has negative carbon balance
Bits of Science    Share    Share on FacebookTwitterShare on LinkedinE-mail article
Not so long ago Brazil was home to not one, but two of the Earth's largest tropical rainforest biomes, the Amazon and the Atlantic Forest. Including true rainforest, dry tropical forest and mangroves the Atlantic Forest used to span an approximate 1.5 million square kilometers. More


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