We are very excited to unveil the new EAG logo, whose bold, modern design highlights geochemical approaches to studying the Earth and beyond. You may also have noticed that we have updated our webpages. Note that the EAG website is now at www.eag.org and our new email address is office@eag.org.
The full science program for Goldschmidt2024 is now available. Attend the meeting in Chicago or participate remotely in the year's premier event in geochemistry.
The early registration deadline for Goldschmidt2024 is 1 July 2024.
Sarah A. Gleeson (GFZ Potsdam and Freie Universität Berlin) was selected as lecturer for the next EAG Distinguished Lecture Program. If you are based in an institution in Eastern Europe, you may invite Sarah to come and present lectures on base metal mineralisations.
As part of the EAG & GS Outreach Program, Elias Samankassou (University of Geneva) was at the University of Ghana last week and presented lectures on Holocene sea level and temperature changes. He then had excellent discussions with local students.
Helen Williams joins the Geochemical Perspectives Board
We are very happy to welcome Helen Williams (University of Cambridge) on the Geochemical Perspectives Editorial Board. Helen's research interests center around the application of non-traditional stable isotope systems to understanding the formation and evolution of planetary interiors.
We would like to invite members of the EAG, as well as anyone interested in the society, to join us at the EAG Members Reception on Wednesday 21 August at 19:30 in Chicago. This is an opportunity to meet some of the EAG Councillors and staff, to share feedback, ideas or ask any questions you may have.
Archean continental crust is present on every continent, but does not constitute a dominant part of any continent’s surficial exposures. Nevertheless, Archean cratons are the longest-lived coherent physical structures on Earth. Viewed holistically, they comprise a welded combination of continental crust and as subcontinental lithospheric mantle keel. They are survivors of what may, or may not, have been a more numerous and varied population of protocontinents. Many of these crustal blocks have origins in the Hadean and have survived for billions of years through many supercontinent cycles...
All EAG members have online access to current and past issues of Elements. Members who have selected to receive print copies of Elements will shortly receive the latest issue by post.
EAG Blogosphere
Experiencing EGU24 part1
The EAG sponsored four PhD students to attend EGU24 in April this year through the Student Sponsorship program. In the first of this two-part blog report, the students introduce themselves and share their experiences of travelling to Vienna...
In part 2 of this report, the four EAG sponsored students share further advice on presenting at EGU, maximising the networking opportunities and enjoying the city of Vienna...
Chondritic osmium isotope composition of early Earth mantle
The Ujaragssuit Intrusion, North Atlantic Craton (NAC), Greenland, is thought to host the oldest chromitites (>3.8 Ga) on Earth, showing evidence of both Hadean mantle depletion events and nucleosynthetic...
Spicule morphology impacts stable silicon isotopic composition of sponge archives
The stable silicon isotopic composition of siliceous sponge skeletal elements, spicules, forms a potential proxy for past dissolved silicon (DSi) concentrations of bottomwaters. Field-based studies have shown that there is...
A baseline for the Sn isotopic composition of the upper continental crust
We report high precision Sn isotopic compositions, expressed as δ122/118Sn relative to the NIST3161a standard, for the fine grained matrix of 24 glacial diamictite composites. The diamictites were deposited...
Neoarchean marine chemical sediments as archives of Hadean silicate differentiation
Planetary differentiation had a profound influence on the geochemical signature of the Earth’s silicate reservoirs. Some of the early created complementary reservoirs dissipated with time (e.g., Bennett et al., 2007)...
Lanthanum anomalies provide constraints on macrofaunal predation at methane seeps
The feeding habits and predation behaviour of organisms can exert significant control on the dynamics of local food webs. Yet, little is known about the effects of predation on the material and trophic transfer dynamics in...
Correlative micro-spectroscopy of biogenic fabrics in Proterozoic silicified stromatolites
Questions surrounding the biogenicity of ancient stromatolites have perplexed geobiologists for decades. Abiotic processes can produce superficially stromatolite-like structures; moreover, stromatolites...
Shape and depth of ocean floor profoundly influence how carbon is stored there
[phys.org] The movement of carbon between the atmosphere, oceans and continents—the carbon cycle—is a fundamental process that regulates Earth's climate. Some factors, like volcanic eruptions or human activity, emit carbon dioxide into...
Dust Declines in Parts of Asia May Be Caused by the Warming Arctic
[Eos] For years, the amount of dust in the atmosphere over West and South Asia has decreased. Now, research suggests that rising temperatures in the Arctic may be the cause. As Arctic ice melts, darker ocean and land surfaces reflect less sunlight...
Global research warns climate change is increasing groundwater temperatures
[University of Newcastle] Shallow groundwater is projected to warm on average between 2.1 and 3.5 degrees Celsius by the end of the century, according to a world-first global groundwater temperature model. The University of Newcastle’s Dr Gabriel...
Volcanic eruption puts on fiery spectacle near Iceland’s Grindavik
[Al Jazeera] A volcano in southwestern Iceland has erupted for the fifth time this year. It is Sundhnukagigar’s most powerful eruption since the volcanic system became active three years ago. The fiery spectacle began shortly after the end of....
Ancient crystals reveal the earliest evidence of fresh water, scientists say
[CNN] A new analysis of ancient grains of crystal embedded in rock from the Australian outback suggests Earth had dry land and fresh water some 4 billion years ago, a time when scientists had thought the planet was completely covered in ocean...
James Webb telescope finds carbon at the dawn of the universe, challenging our understanding of when life could have emerged
[Livescience] The James Webb Space Telescope (JWST) has detected a key building block of life at the dawn of the universe, upending what we know about the first galaxies. The discovery of a cloud of carbon in a distant and compact galaxy as it...
An interstellar cloud may have caused an ice age on Earth. Here's how
[Space.com] Scientists believe Earth may have briefly lost protection from the sun around two million years ago, left to endure the extreme environment of interstellar space as the solar system passed through a dense cloud of gas and dust...
Enormous deposit of rare earth elements discovered in heart of ancient Norwegian volcano
[Livescience] The Fen Carbonatite Complex may be Europe's key to a secure rare-earth-element supply chain following the discovery of a huge deposit at the site. The heart of an ancient volcano in Norway hosts Europe's largest deposit of rare earth...
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