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Asteroids, and their contributions to the volatile inventories of the terrestrial planets
Science    Share    Share on FacebookTwitterShare on LinkedinE-mail article
Determining the source(s) of hydrogen, carbon, and nitrogen accreted by Earth is important for understanding the origins of water and life, and for constraining dynamical processes that operated during planet formation. Chondritic meteorites are asteroidal fragments that retain records of the first few million years of solar system history. The D/H values of water in carbonaceous chondrites and comets are distinct from one another, implying that they formed in a different region of the solar system, contrary to predictions of recent dynamical models. The D/H values of water in carbonaceous chondrites also argue against an influx of water ice from the outer solar system, which has been invoked to explain the non-solar oxygen isotopic composition of the inner solar system. The bulk hydrogen and nitrogen isotopic compositions of CI chondrites suggest that they were the principal source of the Earth's volatiles. More



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Geochemical Career Center
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Does your department have a geochemistry job opening? For a nominal fee (a single 60-day post is US$250), 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 nearly 950 likes. Through August 31, use promotion code GNEWS20 to take 20 percent off your order.

Looking to advance your career in geochemistry? Post your resume to the Career Center and be seen by potential employers.



Meeting Assistance Program

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The Meeting Assistance Program allocates up to five sponsorships per year of up to $2,000 USD each ($10,000 annually) to support geochemistry sessions/symposia at any scientific conference of geochemical relevance. Applications may be submitted at any time to the GS Business Office. Applications must include at a minimum: (1) The name, institution and contact information of the symposium organizer(s), (2) Symposium description, (3) Symposium budget, (4) Description of how the MAP funds will be used, and (5) Description of how the symposium will acknowledge the MAP sponsorship.

Upcoming GS Associated Meetings
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The abstract deadlines for the AGU Fall Meeting and the GSA Annual Meeting are August 8 and 15 respectively. At the GSA meeting, the Geochemical Society will again be sponsoring a reception with MSA and the GSA-MGPV division, as well as welcoming attendees to our exhibit (Booth 806). At the AGU, the Geochemical Society is a sponsor of the VGP reception. Please stop by and say "Hi" to your "G" companions at both GSA and AGU.

New in GCA (v.90, 1 August 2012)
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Influence of size, morphology, surface structure, and aggregation state on reductive dissolution of hematite nanoparticles with ascorbic acid

Tracing soil organic carbon in the lower Amazon River and its tributaries using GDGT distributions and bulk organic matter properties

Collisional facilitation of aqueous alteration of CM and CV carbonaceous chondrites

Framboidal and idiomorphic pyrite in the upper Maastrichtian sedimentary rocks at Gabal Oweina, Nile Valley, Egypt: Formation processes, oxidation products and genetic implications to the origin of framboidal pyrite

Silica- and sulfate-bearing rock coatings in smelter areas: Part II. Forensic tools for atmospheric metal(loid)- and sulfur-isotope compositions

Primordial oxygen isotope reservoirs of the solar nebula recorded in chondrules in Acfer 094 carbonaceous chondrite

Are dual isotope and isotopomer ratios of N2O useful indicators for N2O turnover during denitrification in nitrate-contaminated aquifers?

Solute chemistry and arsenic fate in aquifers between the Himalayan foothills and Indian craton (including central Gangetic plain): Influence of geology and geomorphology

Subseafloor phase equilibria in high-temperature hydrothermal fluids of the Lucky Strike Seamount (Mid-Atlantic Ridge, 37º17'N)


H.D. Holland, geochemist at Princeton, Harvard; 84
The Boston Globe    Share    Share on FacebookTwitterShare on LinkedinE-mail article
Rescued from Germany as a boy just before World War II, Heinrich D. Holland became an Ivy League geochemist who taught thousands of students at Princeton and Harvard while publishing groundbreaking research about the chemical evolution of the earth's ­atmosphere.

Heinrich (Dick) Holland (1927-2012)
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 Latest News


Ice volume and sea level during the last interglacial
Science (free abstract)    Share    Share on FacebookTwitterShare on LinkedinE-mail article
During the last interglacial period, sea level was at least several meters higher than at present, with substantial variability observed for peak sea level at geographically diverse sites. Speculation that the West Antarctic ice sheet collapsed during the last interglacial period has drawn particular interest to understanding climate and ice-sheet dynamics during this time interval. More

Hubble discovers new Pluto moon
BBC    Share    Share on FacebookTwitterShare on LinkedinE-mail article
The Hubble Space Telescope has discovered a fifth moon circling the dwarf planet Pluto. The new moon, visible as a speck of light in Hubble images, is estimated to be irregular in shape and between 10km and 25km across. Scientists are intrigued that such a small world can have such a complex collection of satellites. More

Geologists testing aquifer rocks as containers to permanently trap carbon dioxide
ScienceDaily    Share    Share on FacebookTwitterShare on LinkedinE-mail article
Two Kansas State University geologists are part of a comprehensive statewide study on using rocks for long-term storage of carbon dioxide. More

13-year-old boy using metal detector finds 2-pound meteorite
Los Angeles Times    Share    Share on FacebookTwitterShare on LinkedinE-mail article
As the director of the University of New Mexico's Institute of Meteoritics, Carl Agee gets tons of calls, packages and emails from people claiming to have had the rare experience of actually finding a meteorite. More


 
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