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Mineralogical Association Canada

Check our latest publications from our short-course volumes, special publications or Canadian Mineralogist thematic issues


Evolution of oxygen — long-standing theory challenged
The Daily Galaxy    Share    Share on FacebookTwitterShare on LinkedinE-mail article
A team led by geochemists at the University of California, Riverside challenges the so-called Great Oxidation Event 2.4 billion years ago, and the simple notion of an up-only trend for early oxygen and provides the first compelling direct evidence for a major drop in oxygen after the first rise. The Great Oxidation was critical for the origin and evolution of the first forms of eukaryotic life. The second big step in the up-only hypothesis occurred almost two billion years later, coinciding with the first appearances and earliest diversification of animals. More

 Society News

2013 Distinguished Service Award
GS    Share    Share on FacebookTwitterShare on LinkedinE-mail article
The Geochemical Society is pleased to announce the winners of the 2013 Distinguished Service Award. Kerstin Lehnert, Lamont-Doherty Earth Observatory, Klaus Peter Jochum and Baerbel Sarbas, Max-Planck Institut fur Chemie, and J. Douglas Walker, University of Kansas, Directors of the on-line geochemical databases EarthChem, GeoReM, GEOROC, and NAVDAT, respectively are recognized for their long-running efforts to bring modern on-line data management to geochemistry. Between them, these databases freely present to the geochemical community hundreds of thousands of rock and standard analyses with intelligently designed query structures that allow quick retrieval of the most pertinent data with the minimum of effort. Their contributions in data compilation and improvements to the standard of data reporting in the geochemical community are paving the way to a future where geochemical data can be efficiently preserved, easily and intelligently queried and discovered, and thereby be used for scientific discovery by the broad geoscience research and education community.

Geochemical Society at GSA-Charlotte
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The 2012 F. Earl Ingerson Lecture entitled "Modern soil system constraints on reconstructing deep-time atmospheric CO2: A new view of phanerozoic PCO2" will be presented by Dr. Isabel Montanez (pictured) on Tuesday, Nov. 6, 2012, at 9:50 a.m. in the Charlotte Convention Center (CCC) Room 202AB. The Joint GS/MSA/GSA-MGPV Reception will also be on Tuesday, Nov. 6, 2012 from 5:45 p.m. – 7:30 p.m. In CCC Ballroom C. This is a ticketed event (Professionals $10, Students $5) and tickets will be available at the door. GS will also be at Booth 806 for the duration of the exhibition.

Featured Geochemical Career Center Postings
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New! Faculty Position in Planetary Science (Johns Hopkins University, Baltimore, MD, USA)

Dow Sustainability Postdoctoral Fellowship (University of Michigan, Ann Arbor, MI, USA)

Head and Tenure-Track Professor in the Department of Earth Sciences (The University of Hong Kong, Hong Kong, China)

Head and Tenure-Track Professor in the Department of Earth Sciences (The University of Hong Kong, Hong Kong, China)

Assistant Professor in Earth and Planetary Sciences (Washington University, St. Louis, MO, USA)

Endowed Professorship in Climate Change (Washington University, St. Louis, MO, USA)

Tenure-Track Assistant Professor and Tier II Canada Research Chair in Applied Geochemistry (University of British Columbia, Vancouver, BC, Canada)

Senior-Level Faculty Position in Paleoclimatology (Baylor University, Waco, TX, USA)

Assistant Professor, Atmospheric/ Hydrological Sciences (University of Illinois at Chicago, Chicago, IL, USA)

Carnegie Postdoctoral Fellowship Positions in Geochemistry, Cosmochemistry, and Astrobiology (Carnegie Institution of Washington, Washington, DC, USA)

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New in GCA (v.97, 15 November 2012)
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Assessment of hydropyrolysis as a method for the quantification of black carbon using standard reference materials

Dissolved sulfide-catalyzed precipitation of disordered dolomite: Implications for the formation mechanism of sedimentary dolomite

Molecular environment of stable iodine and radioiodine (129I) in natural organic matter: Evidence inferred from NMR and binding experiments at environmentally relevant concentrations

A surface complexation model of YREE sorption on Ulva lactuca in 0.05–5.0 M NaCl solutions

Oxygen isotope effects associated with substitution of Al for Fe in synthetic goethite: Some experimental evidence and the criterion of oxygen yield

Metasomatic control of water contents in the Kaapvaal cratonic mantle

Iron, zinc, magnesium and uranium isotopic fractionation during continental crust differentiation: The tale from migmatites, granitoids, and pegmatites

 Latest News

Gordon E. Brown, Jr, to Receive 2012 Ian Campbell Medal
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The American Geosciences Institute (AGI) is proud to announce that Dr. Gordon E. Brown, Jr. is the 2012 recipient of the Ian Campbell Medal for Superlative Service to the Geosciences. Dr. Brown is recognized for his contributions as a scientist, educator, administrator, and public servant. He will receive this prestigious award at the Presidential Address Ceremony of the Geological Society of America Annual Meeting in Charlotte, North Carolina (Download the AGI announcement).

Royal Society and NAS issue statement regarding the recent conviction of Italian earthquake scientists
The Royal Society    Share    Share on FacebookTwitterShare on LinkedinE-mail article
The case of six Italian scientists sentenced to be jailed for failing to warn of the L’Aquila earthquake in Italy in 2009 highlights the difficult task facing scientists in dealing with risk communication and uncertainty. Much as society and governments would like science to provide simple, clear-cut answers to the problems that we face, it is not always possible. Scientists can, however, gather all the available evidence and offer an analysis of the evidence in light of what they do know. The sensible course is to turn to expert scientists who can provide evidence and advice to the best of their knowledge. They will sometimes be wrong, but we must not allow the desire for perfection to be the enemy of good. That is why we must protest the verdict in Italy. If it becomes a precedent in law, it could lead to a situation in which scientists will be afraid to give expert opinion for fear of prosecution or reprisal. More

Violent origin of Saturn's oddball moons explained via    Share    Share on FacebookTwitterShare on LinkedinE-mail article
Saturn's icy medium-size moons were born when a few much bigger satellites collided to form the ringed planet's huge moon Titan, a new study suggests. More

Zn isotope evidence for immediate resumption of primary productivity after snowball Earth
Geology    Share    Share on FacebookTwitterShare on LinkedinE-mail article
The snowball Earth hypothesis invokes an almost complete cessation of primary productivity in the surface ocean. Because assimilatory uptake of Zn appears to fractionate its isotopes, Zn isotope ratios measured in carbonate precipitated in the surface ocean should track fluctuations in primary productivity. More

Golden plumes: Substantial gold enrichment of oceanic crust during ridge-plume interaction.
Geology    Share    Share on FacebookTwitterShare on LinkedinE-mail article
Mantle plume events are increasingly implicated as the source of gold (Au) in regions of the Earth that show a high Au endowment. However, the process of enriching oceanic crust in Au by plume activity is poorly understood and unconstrained. We present the first systematic study of Au concentrations in oceanic basalts as a function of distance from a plume center. We show that the influence of the Iceland plume on the Mid-Atlantic Ridge progressively enriches the oceanic crust in Au along the Reykjanes Ridge by as much as 13 times normal levels, over a distance of ~600 km, and that the enrichment can be attributed to specific plume components. This Au enrichment by the Iceland plume implies a genetic relationship between deep mantle upwelling and major gold mineralization. More


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