Mercouri Kanatzidis, an Argonne and Northwestern University materials scientist, has studied sulfur-containing materials called chalcogenides for more than 30 years. A new chalcogenide mineral has just been named for him.
Tag: Geochemistry
“Golden” fossils reveal origins of exceptional preservation
A recent study by scientists at The University of Texas at Austin and collaborators found that many of the fossils from Germany’s Posidonia shale do not get their gleam from pyrite, commonly known as fool’s gold, which was long thought to be the source of the shine. Instead, the golden hue is from a mix of minerals that hints at the conditions in which the fossils formed.
A Better Understanding of Gas Exchange Between the Atmosphere and Ocean Can Improve Global Climate Models
The injection of bubbles from waves breaking in turbulent and cold high-latitude regions of the high seas is an underappreciated way in which atmospheric gases are transported into the interior ocean. An improved mechanistic understanding of gas exchange in high latitudes is important for several reasons, including to better constrain climate models that are used to predict changes in the ocean inventory of key gases like oxygen and carbon dioxide.
Exotic clasts in Chang’e-5 samples indicate unexplored terrane on moon
The Chang’e-5 mission touched down in the Mons Rümker region of the northern Oceanus Procellarum of the Moon and returned 1.731 kg of lunar regolith.
Fossil CSI: Analysis of giant extinct marine reptile graveyard suggests mysterious site was ancient birthing grounds
Marine giants make migrations across the ocean to give birth where predators are scarce, congregating annually along the same stretches of coastline. A study suggests that 200 million years before whales evolved, school bus-sized marine reptiles called ichthyosaurs may have made similar migrations.
Exploring New Materials Through Collaboration
Materials Scientist Jim De Yoreo guides a team that develops novel materials and understands how they form through collaboration and mentorship.
International collaboration compares geologic repository assessment tools
Researchers from Sandia National Laboratories and partner U.S. national laboratories will compare their Geologic Disposal Safety Assessment software framework to the safety assessment software of international peers at a late-April workshop.The Sandia-led Geologic Disposal Safety Assessment framework is a computer modeling system designed to answer critical safety assessment questions about future disposal options for spent nuclear fuel deep underground and the system of tunnels, containers and possible concrete-like barriers used to keep the radioactive material contained far from the surface and water sources, said Emily Stein, a Sandia manager overseeing the development of the framework.
NAU geochemist on new study confirming cause of greatest mass extinction event
Associate professor Laura Wasylenki co-authored a new paper in Nature Communications that presents the results of nickel isotope analyses on Late Permian sedimentary rocks. The results demonstrate the power of nickel isotope analyses, which are relatively new, to solve long-standing problems in the geosciences.
CUR Geosciences Division Announces 2021 Awardees for Excellence in Student Research
The Geosciences Division of the Council on Undergraduate Research announced the 2021 awardees for excellence in student research: Zoe Lacey (Trinity University) and Hanna Szydlowski (Grand Valley State University)
Unlocking the secrets of Earth’s early atmosphere
Research partly conducted at the Advanced Photon Source helped scientists discover the composition of Earth’s first atmosphere. What they found raises questions about the origin of life on Earth.
New Clues Shed Light On Importance Of Earth’s Ice Sheets
Study Stems from Antarctic Expedition to Drill Through Glaciers
Gulf of Mexico Mission: ‘Ocean Blue Holes Are Not Created Equal’
Scientists recently got a unique glimpse into the “Green Banana” Blue Hole thanks to gutsy divers and a 500-pound autonomous, benthic lander. Together with hand-picked, elite scuba divers, the research team is unraveling the structure and behavior of these marine environments by examining geochemistry, hydrodynamics, and biology. Findings from this exploration also may have important implications for phytoplankton in the Gulf of Mexico, including blooms of the Florida Red-tide species Karenia brevis.
Carbon emission from permafrost soils underestimated by 14%
Picture 500 million cars stacked in rows. That’s how much carbon—about 1,000 petagrams, or one billion metric tons—is locked away in Arctic permafrost.
Geologists determine early Earth was a ‘water world’ by studying exposed ocean crust
Geologists studied exposed, 3.2-billion-year-old ocean crust in Australia and used that rock data to build a quantitative, inverse model of ancient seawater. The model indicates the early Earth could have been a “water world” with submerged continents.
Life could have emerged from lakes with high phosphorus
Life as we know it requires phosphorus, which is scarce. How did the early Earth supply this key ingredient? A University of Washington study, published Dec. 30 in the Proceedings of the National Academy of Sciences, finds answers in certain types of carbonate-rich lakes.