Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1126/science.1086163 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Thermal and Structural Analysis of a High-Entropy CrMnFeCoNiP Alloy-Influence of Cooling Rates on Phase Transformations.
Materials (Basel)
November 2024
Institute of Technology, University of the National Education Commission (UKEN), ul. Podchorążych 2, 30-084 Krakow, Poland.
This study investigates the influence of cooling rates on the microstructure and phase transformations of the high-entropy alloy CrMnFeCoNiP. The alloy was synthesized via arc melting and subjected to three cooling conditions: slow cooling (52 K/s), accelerated cooling after a short electric arc pulse (3018 K/s), and rapid quenching (10⁵-10⁶ K/s) using the melt-spinning method. The microstructures were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and Mössbauer spectroscopy.
View Article and Find Full Text PDFEffect of bridgmanite-ferropericlase grain size evolution on Earth's average mantle viscosity: implications for mantle convection in early and present-day Earth.
Prog Earth Planet Sci
December 2024
School of Earth Sciences, Zhejiang University, Hangzhou, China.
Recent experimental investigations of grain size evolution in bridgmanite-ferropericlase assemblages have suggested very slow growth for these bimodal phases. Despite numerous speculations on grain size-dependent viscosity, a comprehensive test with realistic grain size evolution parameters compatible with the lower mantle has been lacking. In this study, we develop self-consistent 2-D spherical half-annulus geodynamic models of Earth's evolution using the finite volume code StagYY to assess the role of grain size on lower mantle viscosity.
View Article and Find Full Text PDFJuxtaposed slab dehydration, decarbonation and seismotectonic variation beneath the Philippine subduction zone based on 3-D modeling.
Sci Rep
November 2024
Geophysics Department, School of Earth Sciences, Yunnan University, Kunming, 650500, China.
Largescale volcanic eruptions and earthquakes are occurring frequently in the Philippines, and research has shown that slab metamorphism and diversity alter the impacts of subducted oceanic plates by changing water‒carbon productivity and interplate stability. Within the framework of the thermal evolution history of subducting slabs, the relationships between subduction zone seismicity characterized by both regular megathrust earthquakes and slow slip events of various magnitudes and long-term slab dehydration-decarbonation evolution in the Philippines remain poorly understood. Here, we constructed a comprehensive thermal model incorporating 3-D slab geometric data for the incoming plate and a 3-D subduction velocity field based on the MORVEL plate motion dataset for the Philippine subduction zone with high spatial and temporal resolutions.
View Article and Find Full Text PDFUsing mercury and lead stable isotopes to assess mercury, lead, and trace metal source contributions to Great Salt Lake, Utah, USA.
Sci Total Environ
December 2024
Department of Geology and Geophysics, University of Utah, Salt Lake City, UT 84112, United States. Electronic address:
Great Salt Lake is a critical habitat for migratory birds that is threatened by elevated metal concentrations, including mercury (Hg) and lead (Pb), and is subject to severe hydrologic changes, such as declining lake level. When assessing metal profiles recorded in Great Salt Lake sediment, a large data gap exists regarding the sources of metals within the system, which is complicated by various source inputs to the lake and complex biogeochemistry. Here, we leverage Hg and Pb stable isotopes to track relative changes in metal source contributions to Great Salt Lake over time.
View Article and Find Full Text PDFAnalysis and application of low frequency shadows based on the asymptotic theory for porous media.
Sci Rep
October 2024
College of Energy (College of Modern Shale Gas Industry), Chengdu University of Technology, Chengdu, 610059, Sichuan, China.
Low-frequency shadows beneath gas reservoirs can be regarded as a time delay relative to the reflection from the reservoir zone, but they cannot be reasonably explained by the high-frequency attenuation or velocity dispersion observed in normal P-waves. According to the new asymptotic theory for porous media, seismic P-waves undergo multiple conversions between fast and slow modes during seismic waves passing through layered permeable reservoirs at low frequencies, and changes in the velocity and amplitude (i.e.
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!