AI Article Synopsis
- Crystallographic preferred orientation (CPO) of post-perovskite (Mg,Fe)SiO is thought to contribute to seismic anisotropy in the lower mantle's D″ layer, but its natural CPO is unclear.
- Deformation experiments conducted at high pressure and temperature reveal that the intrinsic texture of pPv-(Mg,Fe)SiO is primarily (001) under conditions like those in the D″ layer, leading to a shear wave splitting anisotropy of about 3.7%.
- The study suggests that even with a deformation of 50% or less from pPv and ferropericlase, this can account for the seismic anisotropy observed in the D″ layer beneath the circum-Pacific area.
Article Abstract
Crystallographic preferred orientation (CPO) of post-perovskite (Mg,Fe)SiO (pPv) has been believed to be one potential source of the seismic anisotropic layer at the bottom of the lower mantle (D″ layer). However, the natural CPO of pPv remains ambiguous in the D″ layer. Here we have carried out the deformation experiments of pPv-(Mg,Fe)SiO using synchrotron radial X-ray diffraction in a membrane-driven laser-heated diamond anvil cell from 135 GPa and 2,500 K to 154 GPa and 3,000 K. Our results show that the intrinsic texture of pPv-(Mg,Fe)SiO should be (001) at realistic P-T conditions of the D″ layer, which can produce a shear wave splitting anisotropy of ∼3.7% with V>V. Considering the combined effect of both pPv and ferropericlase, we suggest that 50% or less of deformation is sufficient to explain the origin of the shear wave anisotropy observed seismically in the D″ layer beneath the circum-Pacific rim.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5501973 | PMC |
| http://dx.doi.org/10.1038/ncomms14669 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Donations triggered by inequality tolerance affect the evolution of cooperation in spatial public goods game.
Chaos
January 2025
School of Statistics and Mathematics, Yunnan University of Finance and Economics, Kunming 650221, China.
Generosity through donation plays a crucial role in reducing inequality and influencing human behavior. However, previous research on donation has overlooked individuals' acceptance of the extent of inequality, which acts as a trigger for donation. To address this gap, this paper systematically explores the impact of donation based on inequality tolerance on the evolution of cooperation in spatial public goods game.
View Article and Find Full Text PDFSurface-Sensitive Waveguide Imaging for In Situ Analysis of Membrane Protein Binding Kinetics.
Anal Chem
January 2025
Beijing National Laboratory for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
Ligand binding to membrane proteins initiates numerous therapeutic processes. Surface plasmon resonance (SPR), a popular method for analyzing molecular interactions, has emerged as a promising tool for in situ determination of membrane protein binding kinetics owing to its label-free detection, high surface sensitivity, and resistance to intracellular interference. However, the excitation of SPR relies on noble metal films, typically gold, which are biologically incompatible and can cause fluorescence quenching.
View Article and Find Full Text PDFNew Layered Boride NiPtB ( = 0.5) with a Ternary Derivative Structure of MoB.
Inorg Chem
January 2025
Institute of Solid State Physics, TU Wien, A-1040 Vienna, Austria.
A novel ternary boride, NiPtB ( = 0.5), was obtained by argon-arc melting of the elements followed by annealing at 750 °C. It exhibits a new structure type with the space group ( = 2.
View Article and Find Full Text PDFStructure Protects Function: A Multilevel Engineered Surface Modification Renders the Surface of Titanium Dental Implants Resistant to Bacterial Colonization.
ACS Appl Mater Interfaces
January 2025
DWI─Leibniz Institute for Interactive Materials e.V., Forckenbeckstraße 50, Aachen 52074, Germany.
The global dental implant market is projected to reach $9.5 billion by 2032, growing at a 6.5% compound annual growth rate due to the rising prevalence of dental diseases.
View Article and Find Full Text PDFProbing Impact of Support Pore Diameter on Three-phase Interfaces of Pt/C Catalysts by Molecular Dynamic Simulation.
ACS Appl Mater Interfaces
January 2025
State Key Laboratory of Advanced Chemical Power Sources (Chongqing University), Chongqing 400044, China.
Investigating how the size of carbon support pores influences the three-phase interface of platinum (Pt) particles in fuel cells is essential for enhancing catalyst utilization. This study employed molecular dynamics simulations and density functional theory calculation to examine the effects of mesoporous carbon support size, specifically its pore diameter, on Nafion ionomer distribution, as well as on proton and gas/liquid transport channels, and the utilization of Pt active sites. The findings show that when Pt particles are located within the pores of carbon support (Pt/PC), there is a significant enhancement in the spatial distribution of Nafion ionomer, along with a reduction in encapsulation around the Pt particles, compared to when Pt particles are positioned on the surface or in excessively large pores of the carbon support.
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!