Is this you? As a journalist, you can create a free Muck Rack account to customize your profile, list your contact preferences, and upload a portfolio of your best work.
Claim your profile
Articles by Steven Goderis
The origin of Cretaceous-Palaeogene impactor revealed by nickel isotopes
Abstract INTRODUCTION RESULTS DISCUSSION MATERIALS AND METHODS Acknowledgments Supplementary Materials REFERENCES Information & Authors Metrics & Citations View Options References Figures Tables Media Share Abstract Sixty-six million years ago, non-avian dinosaurs and other taxa went extinct during one of the largest mass extinctions in the history of life on Earth. The extinction was likely caused by an asteroid of unknown origin, responsible for the Chicxulub impact structure.
16 O poor cosmic spherules from near-Earth CY chondrite asteroids
Abstract INTRODUCTION RESULTS DISCUSSION MATERIALS AND METHODS Acknowledgments Supplementary Materials REFERENCES Information & Authors Metrics & Citations View Options References Figures Tables Media Share Abstract Approximately 10% of cosmic spherules—microscopic extraterrestrial particles that melt upon atmospheric entry and dominate the influx of astromaterials to Earth—exhibit anomalous oxygen isotopic compositions, suggesting an asteroidal source not represented in current meteorite...
Iron deficiency induces maturation-dependent loss of pancreatic β-cells - Nature Communications
|
Abstract Pancreatic β-cells maintain glucose homeostasis by secreting insulin in response to rising blood glucose, a process fueled by mitochondrial ATP production. Iron, a core cofactor in the electron transport chain, is essential for this metabolic coupling. While the cytotoxic effects of iron overload are well known, the role of iron sufficiency during β-cell development remains unclear. Here, we identify a maturation-dependent requirement for iron in mouse and human β-cells.
By Annelore Van Mulders, Sophie Coenen, Stephanie Bourgeois, Xiaoyan Yi, Yue Tong, Gunter Leuckx, Yves Heremans, Julie Pierreux, Toshiaki Sawatani, Chiara Vinci, Gamze Bölükbaşı Ateş, Ann MacLean Massie, Françoise Carlotti, Eelco de Koning, Thomas Mandrup-Poulsen, Steven Goderis, Bart Ghesquière, Raphaël Scharfmann, Miriam Cnop, Willem Staels, Lien Willems, Laure Degroote, Clara Zelinsky, Nico De Leu
|
Nature
Verified
Prolonged 187Os/188Os excursion implies hydrothermal influence after the Chicxulub impact in the Gulf of Mexico - Nature Communications
Abstract The Cretaceous/Paleogene boundary asteroid impact is recorded globally as a negative 187Os/188Os excursion, including in sediments recovered from the IODP-ICDP drilling within the peak ring of the Chicxulub structure in the Gulf of Mexico. The reconstructed marine 187Os/188Os curves can be used for global age correlations on the ~10 kyr scale. However, the versatility of Os isotope clock between the proximal and distal sites remains unclear.
Reduced contribution of sulfur to the mass extinction associated with the Chicxulub impact event - Nature Communications
Abstract The Chicxulub asteroid impact event at the Cretaceous-Paleogene (K-Pg) boundary ~66 Myr ago is widely considered responsible for the mass extinction event leading to the demise of the non-avian dinosaurs. Short-term cooling due to massive release of climate-active agents is hypothesized to have been crucial, with S-bearing gases originating from the target rock vaporization considered an important driving force. Yet, the magnitude of the S release remains poorly constrained.
Ruthenium isotopes show the Chicxulub impactor was a carbonaceous-type asteroid
Editor’s summary The geologic boundary between the Cretaceous and Paleogene eras 66 million years ago is marked by worldwide deposits from an impact at modern Chicxulub, Mexico. The impact coincides with a mass extinction that wiped out non-avian dinosaurs and many other species. Fischer-Gödde et al. measured ruthenium isotopes in the impact deposits and compared them with multiple classes of meteorites, which represent potential impactor compositions.
Elemental and oxygen isotopic fractionation recorded in highly vaporized cosmic spherules from Widerøefjellet, Sør Rondane Mountains (East Antarctica)
Conflict of Interest Statement We, the authors, hereby declare that there are no conflicts of interest to declare. There is no financial interest to report. We certify that the submission is original work and is not under review at any other publication. REFERENCES , , , , and 2002. Mass-Dependent Fractionation of Mg, Si and Fe Isotopes in Five Stony Cosmic Spherules. Geochimica et Cosmochimica Acta 66: 173–183. , , , , , and 2016.
Antarctic meteorites threatened by climate warming - Nature Climate Change
Abstract More than 60% of meteorite finds on Earth originate from Antarctica. Using a data-driven analysis that identifies meteorite-rich sites in Antarctica, we show climate warming causes many extraterrestrial rocks to be lost from the surface by melting into the ice sheet.
Analytical capabilities of LA-ICP-ToF-MS for ultra-fast 2D quantitative elemental mapping of micrometeorites
Analytical capabilities of LA-ICP-ToF-MS for ultra-fast 2D quantitative elemental mapping of micrometeorites Time-of-flight ICP-mass spectrometry (ICP-ToF-MS) allows acquisition of almost the entire periodic table in only a few tens of microseconds, with several mass spectra combined into a single readout.
Chicxulub impact winter sustained by fine silicate dust - Nature Geoscience
Abstract The Chicxulub impact is thought to have triggered a global winter at the Cretaceous-Palaeogene (K-Pg) boundary 66 million years ago. Yet the climatic consequences of the various debris injected into the atmosphere following the Chicxulub impact remain unclear, and the exact killing mechanisms of the K-Pg mass extinction remain poorly constrained.
ANOTHER ONE BITES THE DUST: PHOTOSYNTHETIC COLLAPSE FOLLOWING CHICXULUB IMPACT TRIGGERED BY FINE SILICATE DUST
Welcome to the GSA Connects 2023 Meeting in Pittsburgh, Pennsylvania...please wait while the program loads. Oops! Your browser seems to have javascript disabled. Make sure javascript is enabled or try opening a different browser.
Genesis of the mafic impact melt rock in the northwest sector of the Vredefort Dome, South Africa
Filename Description maps14027-sup-0001-Supporting information.docxWord 2007 document , 14 KB Table S1. Major and trace element data from Wannek (2005). ICP-MS analyses at SGS GEOSOL laboratories, Vespasiano, Brazil. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.
Fluid mobilization of rare earth elements, Th, and U during the terrestrial alteration of H chondrites
Corresponding Author Ryoga Maeda Analytical-, Environmental-, and Geo-Chemistry, Vrije Universiteit Brussel, Brussels, Belgium Laboratoire G-Time, Université libre de Bruxelles, Brussels, Belgium Submarine Resources Research Center (SRRC), Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokosuka, Japan REE Smelting Unit, Development of Production Technology for REE, General Project Team for SIP, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokosuka, Japan...
Globally distributed iridium layer preserved within the Chicxulub impact structure
Abstract The Cretaceous-Paleogene (K-Pg) mass extinction is marked globally by elevated concentrations of iridium, emplaced by a hypervelocity impact event 66 million years ago. Here, we report new data from four independent laboratories that reveal a positive iridium anomaly within the peak-ring sequence of the Chicxulub impact structure, in drill core recovered by IODP-ICDP Expedition 364.
Innovative two-step isolation of Ni prior to stable isotope ratio measurements by MC-ICP-MS: Application to igneous geological reference materials
Innovative two-step isolation of Ni prior to stable isotope ratio measurements by MC-ICP-MS: Application to igneous geological reference materials Nickel stable isotope ratios have attracted a growing interest across the (bio)geochemical and environmental sciences since the late 2000s.
Subdaily‐Scale Chemical Variability in a Torreites Sanchezi Rudist Shell: Implications for Rudist Paleobiology and the Cretaceous Day‐Night Cycle
Abstract This study presents subdaily resolved chemical records through fossil mollusk shell calcite. Trace element profiles resolve periodic variability across ~40‐μm‐thin daily growth laminae in a Campanian Torreites sanchezi rudist bivalve. These high‐resolution records are combined with seasonally resolved stable isotope and trace element records that allow shell‐chemical variability to be discussed on both seasonal and daily scale.
Nanosecond Laser Ablation-Multicollector Inductively Coupled Plasma-Mass Spectrometry for in Situ Fe Isotopic Analysis of Micrometeorites: Application to Micrometer-Sized Glassy Cosmic Spherules | Analytical Chemistry
This work evaluates the use of nanosecond laser ablation–multicollector inductively coupled plasma-mass spectrometry (ns-LA–MC-ICP-MS) for Fe isotopic analysis of glassy cosmic spherules. Several protocols for data acquisition from the transient signals were compared, with the integration method, i.e., isotope ratios obtained by dividing the corresponding signal intensities integrated over the selected signal segment, providing the best precision.
An extraterrestrial trigger for the mid-Ordovician ice age: Dust from the breakup of the L-chondrite parent body
Abstract The breakup of the L-chondrite parent body in the asteroid belt 466 million years (Ma) ago still delivers almost a third of all meteorites falling on Earth. Our new extraterrestrial chromite and 3He data for Ordovician sediments show that the breakup took place just at the onset of a major, eustatic sea level fall previously attributed to an Ordovician ice age.
Metal‐Free Cyclization of ortho‐Nitroaryl Ynamides and Ynamines towards Spiropseudoindoxyls
An efficient metal‐free cascade reaction between 1‐dibromovinyl‐2‐nitro‐substituted arenes and secondary amines results in the formation of polycyclic pseudoindoxyls in a single step. The reaction mechanism leading to these fused ring systems was investigated, and is believed to involve the initial formation of nitroarylated ynamines/ynamides.
Metal‐Free Cyclization of ortho‐Nitroaryl Ynamides and Ynamines towards Spiropseudoindoxyls
An efficient metal‐free cascade reaction between 1‐dibromovinyl‐2‐nitro‐substituted arenes and secondary amines results in the formation of polycyclic pseudoindoxyls in a single step. The reaction mechanism leading to these fused ring systems was investigated, and is believed to involve the initial formation of nitroarylated ynamines/ynamides.
Isotopes in Cosmochemistry: Recipe for a Solar System
Extreme isotopic variations among extraterrestrial materials provide great insights into the origin and evolution of the Solar System. In this tutorial review, we summarize how the measurement of isotope ratios can expand our knowledge of the processes that took place before and during the formation of our Solar System and its subsequent early evolution.
Show More
loading
Actions
Is this you?
As a journalist, you can create a free Muck Rack account to customize your profile, list your contact preferences, and upload a portfolio of your best work.Get in touch with Steven
Contact Steven, search articles and posts on X, monitor coverage, and track replies from one place.
Learn more about Muck Rack