Results 61 to 70 of about 1,221 (137)
Hydrogen‐Dominated Iron Phase Stability and the Structure of the Earth's Inner Core
Geophysical Research Letters, Volume 53, Issue 18, 28 September 2026.Abstract The crystal structure of Earth's inner core (IC) remains debated, with the free energy difference between hexagonal close‐packed (hcp) and body‐centered cubic (bcc) iron under IC conditions being very small. We use ab initio and machine learning force field molecular dynamics simulations to show that hydrogen can strongly influence the phase ...
Qianxi Chen +2 more
wiley +1 more source
Seismic and Aseismic Slip Compete to Regulate Permeability Evolution During Fault Reactivation
Geophysical Research Letters, Volume 53, Issue 18, 28 September 2026.Abstract Crustal permeability can be created through microearthquakes as observed at field and laboratory scales. The respective roles of seismic and aseismic slip in governing permeability evolution remain ill‐constrained. Here, we present observations of controlled pore pressure stepping experiments designed to distinguish the separate influences of ...
Junpeng Wang +6 more
wiley +1 more source
Geophysical Research Letters, Volume 53, Issue 18, 28 September 2026.Abstract The mechanisms underlying the patchy distribution of forearc megathrust earthquakes and arc volcanoes in subduction zones remain poorly understood. Here we present a high‐resolution seismic tomographic model of the Central American subduction zone, derived from a joint inversion of local body‐wave and teleseismic Rayleigh‐wave data.
Junhao Zhang +3 more
wiley +1 more source
Geophysical Research Letters, Volume 53, Issue 18, 28 September 2026.Abstract Marine terraces archive sea‐level and tectonic history, yet their relationship to individual highstands remains contentious. While most studies focus on subaerial terraces in uplifting settings, submerged terraces in subsiding settings are less explored. We develop a 1‐D wave‐erosion model and apply it to Dokdo — a subsiding volcanic island in
Duhwan Keum +3 more
wiley +1 more source
Hydrogen‐Bond Symmetrization in Hydrous Aluminous Silica Enhances Deep‐Mantle Water Cycle
Geophysical Research Letters, Volume 53, Issue 18, 28 September 2026.Abstract (Al, H)‐bearing CaCl2‐type SiO2 serves as a key water carrier in Earth's deep‐water cycle. Evolution of hydrogen‐bond symmetrization in this phase was measured up to 62 GPa and 800 K by synchrotron infrared and Raman spectroscopy, and X‐ray diffraction.
Chaoshuai Zhao +8 more
wiley +1 more source
A Shallow‐Marine Ecosystem Before Initial Tibetan Plateau Uplift
Geophysical Research Letters, Volume 53, Issue 18, 28 September 2026.Abstract The uplift of the Tibetan Plateau profoundly influences global atmospheric circulation, sediment transport, and biodiversity, but its pre‐uplift marine paleoenvironment remains poorly understood. Here we report the first discovery of an in situ benthic fossil assemblage from the Puga area in central Tibet, which was deposited on a shallow ...
Ming Wang +12 more
wiley +1 more source
A Multi‐Basin Calibration of Magnetofossils as a Quantitative Proxy for Bottom Water Oxygenation
Geophysical Research Letters, Volume 53, Issue 18, 28 September 2026.Abstract Magnetofossils, produced by magnetotactic bacteria, are widespread in marine sediments and are thought to be linked to oxygen concentrations. Until recently, their applications as a quantitative proxy for bottom water oxygen (BWO) are limited due to the lack of data from modern marine environments. Here, we present a multi‐basin calibration of
Rong Huang +16 more
wiley +1 more source
Geophysical Research Letters, Volume 53, Issue 18, 28 September 2026.Abstract Intracontinental deformation records how early Eocene India–Asia collisional stress propagated into continental interiors. How rapidly compression reached the far field, and whether coeval Paleo‐Pacific slab dynamics contributed, remain debated. The Longzhong Basin, ∼1,900 km north of the collisional zone, provides a key test.
Zhantao Feng +8 more
wiley +1 more source
Geophysical Research Letters, Volume 53, Issue 18, 28 September 2026.Abstract The role of inherited lithospheric structures in active rift seismicity and magma intrusion remains a key uncertainty in continental breakup dynamics. We investigate the January 2025 Northern Main Ethiopian Rift swarm using constrained 3‐D gravity inversion and D‐InSAR observations to characterize crustal architecture, seismicity, and active ...
Denberu Besfat, Tilahun Mammo
wiley +1 more source
Reaction‐Gated Transient Permeability in Ductile Shear Zones
Geophysical Research Letters, Volume 53, Issue 18, 28 September 2026.Abstract Ductile shear zones act as transient pathways for crustal fluids, yet the conditions under which their connected porosity becomes sufficient to conduct are not well constrained. We present a porosity balance in which connected porosity evolves under three competing processes: creation by creep cavitation, creation by metamorphic reaction, and ...
Ioan V. Sanislav +2 more
wiley +1 more source