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Meteorites reveal another way to make life's components
Astrobiology Magazine    Share    Share on FacebookTwitterShare on LinkedinE-mail article
Creating some of life's building blocks in space may be a bit like making a sandwich — you can make them cold or hot, according to new NASA research. This evidence that there is more than one way to make crucial components of life increases the likelihood that life emerged elsewhere in the Universe, according to the research team, and gives support to the theory that a "kit" of ready-made parts created in space and delivered to Earth by impacts from meteorites and comets assisted the origin of life. More

 Society News

Call for nominations: Alfred Treibs Award
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Nominations for the Organic Geochemistry Division's 2012 Alfred Treibs Award are being accepted through April 17, 2012. The Treibs Medal honors major achievements, over a period of years, in organic geochemistry. Please take the time to honor the accomplishments of valued friends and colleagues by submitting a nomination. More

Geochemical Career Center Posting

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Faculty position in geology, low temperature geochemistry
Utah State University — Department of Geology

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New in GCA (Volume 83, 15 April 2012)
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Rare earth element patterns in a Chinese stalagmite controlled by sources and scavenging from karst groundwater

Early diagenesis of recently deposited organic matter: A 9-yr time-series study of a flood deposit

The reduction of selenium(IV) by hydrogen sulfide in aqueous solutions

A spectrophotometric study of the formation and deprotonation of thioarsenite species in aqueous solution at 22 °C

Thermal transformations of organic and inorganic sulfur in Type II kerogen quantified by S-XANES

Geochemistry of CI chondrites: Major and trace elements, and Cu and Zn Isotopes

An experimental study of magnesite precipitation rates at neutral to alkaline conditions and 100–200 °C as a function of pH, aqueous solution composition and chemical affinity

Progressive barite dissolution in the Costa Rica forearc – Implications for global fluxes of Ba to the volcanic arc and mantle

Experimental evidence for interaction of water vapor and platinum crucibles at high temperatures: Implications for volatiles from igneous rocks and minerals

Origin of sulfide replacement textures in lunar breccias. Implications for vapor element transport in the lunar crust

Isotopically uniform, 16O-depleted calcium, aluminum-rich inclusions in CH and CB carbonaceous chondrites

δ44/40Ca variability in shallow water carbonates and the impact of submarine groundwater discharge on Ca-cycling in marine environments


 Latest News

MSA Announces 2012-13 Distinguished Lecturers
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The Mineralogical Society of America is pleased to announce the MSA Distinguished Lecturers for 2012-13: Julia Baldwin (University of Montana), Matt Kohn (Boise State University), and Hans-Peter Schertl (Ruhr-Universitaet Bochum). For more information on the lecturers, the program and instructions on how to request a visit by an MSA lecturer, please visit: More

Early Earth had periodic organic haze

TG Daily    Share    Share on FacebookTwitterShare on LinkedinE-mail article
The early Earth flipped back and forth between a hydrocarbon-free atmosphere and a hydrocarbon-rich one similar to that of Saturn's moon, Titan. More

Monitoring volcanoes
Science (paid subscription required)    Share    Share on FacebookTwitterShare on LinkedinE-mail article
The ascent of magma in volcanoes is typically accompanied by numerous small earthquakes, the release of magmatic gases, and surface deformation. Systematic volcano monitoring to detect these phenomena began in 1845 with the completion of the Osservatorio Vesuviano. Other volcano observatories soon followed, such as the Hawaiian Volcano Observatory, which celebrates its 100th anniversary this year. More

Danger in paradise: The hidden hazards of volcano geotourism
EARTH Magazine    Share    Share on FacebookTwitterShare on LinkedinE-mail article
In November 2000, rangers at Hawaii Volcanoes National Park made a gruesome discovery. The bodies of a man and a woman, in an advanced state of decomposition, were found near the site where lava from the Kilauea eruption flows into the sea, sending up plumes of scalding white steam. The area, aptly named the Eruption Site, is littered with chunks of tephra, a glassy volcanic rock, which are formed and ejected violently into the air when the 2,000-degree-Celsius lava is quenched by seawater. More

The deepest, hottest hydrothermal vents in the world: A field report from the Mid-Cayman spreading center
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From Jan. 6-27, the research vessel Atlantis idled patiently over the Mid-Cayman Rise, a patch of tortured oceanic crust in the Caribbean Sea. Several thousand meters beneath the water's surface, the remotely operated vehicle JASON collected samples, snapped pictures, and deployed experiments at one of the most unusual patches of hydrothermal vents known to science. More

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