Young asteroid families seed more than 70% of extraterrestrial rocks found on the planet.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1126/science.adt9018 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Efficient Cd separation protocols for high-precision cadmium isotope analyses of diverse samples by double spike MC-ICP-MS.
Talanta
November 2024
Department of Earth Science and Engineering, Imperial College London, London SW7 2AZ, UK.
Cadmium isotope analyses are applied for research in planetary, Earth, environmental and life sciences. However, there is still a lack of efficient methods for the separation of the trace element Cd from the different types of samples that are of interest for isotopic analyses. This study presents new and improved Cd separation and purification techniques for meteorite, diverse terrestrial and seawater samples prior to Cd isotope measurements by multiple collector ICP-MS using the double spike approach for mass bias correction.
View Article and Find Full Text PDFZircon trace element evidence for early hydrothermal activity on Mars.
Sci Adv
November 2024
Space Science and Technology Centre, School of Earth and Planetary Sciences, Curtin University, Perth Bentley WA 6845, Australia.
Article Synopsis
- Finding direct evidence of water on early Mars helps us understand how water originated on rocky planets and affects the potential for habitability.
- Micro- to nanoscale microscopy of a specific zircon from a meteorite revealed signs of hydrothermal conditions on Mars around 4.45 billion years ago.
- The observed textural features, including elemental zoning and nanoscale inclusions, suggest that this zircon formed in the presence of hydrous fluids, indicating that Mars once had a wet crust before the heavy impact events.
Rapid Destruction of Lipid Biomarkers Under Simulated Cosmic Radiation.
Astrobiology
November 2024
Department of Biology, Georgetown University, Washington, District of Columbia, USA.
Understanding how organics degrade under galactic cosmic rays (GCRs) is critical as we search for traces of ancient life on Mars. Even if the planet harbored life early in its history, its surface rocks have been exposed to ionizing radiation for about four billion years, potentially destroying the vast majority of biosignatures. In this study, we investigated for the first time the impact of simulated GCRs (using gamma rays) on several types of lipid biosignatures (including hopane C, sterane C, alkanes, and fatty acids [FAs]) in both the presence and absence of salts (NaCl, KCl, and MgCl).
View Article and Find Full Text PDFYoung asteroid families seed more than 70% of extraterrestrial rocks found on the planet.
View Article and Find Full Text PDFTrace metals found at extinction layer implicate rare, carbon-rich type of meteorite.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!