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Kinematics of the Reykjanes Ridge: Influence of the Iceland Hotspot on Plate Boundary Evolution J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-03-18 Daniel Thorhallsson, Fernando Martinez, Richard Hey, Ármann Höskuldsson
The slow spreading Reykjanes Ridge overlies the Iceland hotspot and has undergone well ordered changes in crustal segmentation. Previous studies have attributed these changes to varying mantle plume thermal effects, rendering the lithosphere ductile or brittle. Here we use seafloor spreading magnetic anomalies to show that crustal accretion has been focused throughout its spreading history and to determine
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Along-Strike Variations of Alaska Subduction Zone Structure and Hydration Determined From Amphibious Seismic Data J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-03-16 Zongshan Li, Douglas A. Wiens, Weisen Shen, Donna J. Shillington
We develop a 3-D isotropic shear velocity model for the Alaska subduction zone using data from seafloor and land-based seismographs to investigate along-strike variations in structure. By applying ambient noise and teleseismic Helmholtz tomography, we derive Rayleigh wave group and phase velocity dispersion maps, then invert them for shear velocity structure using a Bayesian Monte Carlo algorithm.
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Modeled Flooding by Tsunamis and a Storm Versus Observed Extent of Coral Erratics on Anegada, British Virgin Islands—Further Evidence for a Great Caribbean Earthquake Six Centuries Ago J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-03-14 Yong Wei, Uri S. ten Brink, Brian F. Atwater
Models of near-field tsunamis and an extreme hurricane provide further evidence for a great precolonial earthquake along the Puerto Rico Trench. The models are benchmarked to brain-coral boulders and cobbles on Anegada, 125 km south of the trench. The models are screened by their success in flooding the mapped sites of these erratics, which were emplaced some six centuries ago. Among 25 tsunami scenarios
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Broadband Love Wave Phase Velocity Maps Based on Modified Double-Beamforming of Ambient Noise Cross-Correlations J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-03-14 Kaifeng Zhao, Yingjie Yang, Yinhe Luo
Ambient noise tomography has become a popular method in the past two decades to image the crust and uppermost mantle structure. To date, broadband Rayleigh wave signals can be obtained from ambient noise, which can be utilized to study the earth's interior structure from the surface down to ∼200–300 km depths. However, it is hard to extract intermediate- and long-period (>50 s) Love wave signals from
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Upper-Mantle Anisotropy in the Southeastern Margin of Tibetan Plateau Revealed by Fullwave SKS Splitting Intensity Tomography J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-03-14 Yi Lin, Li Zhao
The southeastern margin of the Tibetan Plateau has undergone complex deformation since the Cenozoic, resulting in a high level of seismicity and seismic hazard. Knowledge about the seismic anisotropy provides important insight about the deformation mechanism and the regional seismotectonics beneath this tectonically active region. In this study, we conduct fullwave multi-scale tomography to investigate
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Hematite Frictional Behavior and He Loss From Comminution During Deformation Experiments at Slow Slip Rates J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-03-12 A. A. DiMonte, A. K. Ault, G. Hirth, C. D. Meyers
Deformation experiments on hematite characterize its slip-rate dependent frictional properties and deformation mechanisms. These data inform interpretations of slip behavior from exhumed hematite-coated faults and present-day deformation at depth. We used a rotary-shear apparatus to conduct single-velocity and velocity-step experiments on polycrystalline specular hematite rock (∼17 μm average plate
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Uppermost Mantle Pn Velocity and Anisotropy Structures Beneath the Sakhalin–Kuril–Kamchatka Region J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-03-14 Yan Lü, Yuhui He, Juan Li, Shunping Pei, Qi-Fu Chen, Qingju Wu
In this study, we used the Pn tomography method to obtain detailed velocity and anisotropy structures of the uppermost mantle beneath Sakhalin–Kuril–Kamchatka region for improving the understanding of plate subduction, arc–arc collision, and volcanism. We found low Pn velocities beneath volcanoes and areas characterized by pronounced tectonic activity and high Pn velocities with strong anisotropy in
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Long- and Short-Term Effects of Seismic Waves and Coseismic Pressure Changes on Fractured Aquifers J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-03-13 Yan Zhang, Michael Manga, Li-Yun Fu, Huai Zhang, Tianming Huang, Qiuye Yang, Zhen-Dong Cui, Shengwen Qi, Yuan Huang
Two adjacent groundwater wells on the North China Platform are used to study how earthquakes impacted aquifers. We use the response of water level to solid Earth tides to document changes after earthquakes and how aquifer and fracture properties recovered to pre-earthquake properties. We consider two models for the phase and amplitude of water level response to the lunar diurnal (O1) and semidiurnal
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Ambient Noise Interferometry Using Ocean Bottom Seismometer Data From Active Source Experiments Conducted in the Southernmost Mariana Trench J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-03-13 Yayun Zhang, Min Xu, Zhuo Xiao, Yong Zhou, Chuanhai Yu, Jian Lin, Hongfeng Yang, Xuelin Qiu
Ocean bottom seismometers (OBSs) have been used to detect submarine structural and tectonic information for decades. According to signal source controllability, OBS data have generally been classified into active and passive source data categories. The former mainly focuses on the compressional wave (P-wave) velocity inversion and always lacks valid information about the shear wave (S-wave) velocity
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Type-B Crystallographic Preferred Orientation in Olivine Induced by Dynamic Dehydration of Antigorite in Forearc Regions J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-03-11 Wenlong Liu, Yi Cao, Jianfeng Li, Maoshuang Song, Haijun Xu, Yongfeng Wang, Xiang Wu, Junfeng Zhang, David L. Kohlstedt
The crystallographic preferred orientation (CPO) of olivine, specifically the type-B characterized by c-axes aligned parallel to lineation and b-axes concentrated perpendicular to foliation, is essential for explaining the trench-parallel seismic anisotropy in the forearc regions of subduction zones. However, its origin remains a subject of ambiguity and controversy. In this study, we present experimental
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Structure and Tectonic Evolution of the NW Sulu Sea Basin (SE Asia) J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-03-11 Patricia Cadenas, César R. Ranero
We discuss the tectonic structure, seismic stratigraphy and evolution of the NW Sulu Sea using reprocessed 2D reflection profiles. The NW Sulu Sea is located between the Palawan continental shelf and the Cagayan Ridge and represents the northern part of the Sulu Sea, a marginal sea resulting from Paleogene extension and subsequent Neogene contraction due to convergence between the Palawan and the Philippine
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Thermal Stability of F-Rich Phlogopite and K-Richterite During Partial Melting of Metasomatized Mantle Peridotite With Implications for Deep Earth Volatile Cycles J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-03-11 E. S. Steenstra, M. Klaver, J. Berndt, S. Flemetakis, A. Rohrbach, S. Klemme
Phlogopite and K-richterite constitute important carrier phases for H and F in Earth's lithosphere and mantle. The relative importance depends on their stabilities at high pressure and temperature, which in turn depends on bulk composition. Most previous experimental studies focused on the thermal stability of phlogopite and K-richterite were conducted using simplified chemical compositions. Here,
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High-Temperature Deformation of Enstatite-Olivine Aggregates J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-03-11 M. Bystricky, J. Lawlis, S. Mackwell, F. Heidelbach
Synthesized polycrystalline samples composed of enstatite and olivine with different volumetric ratios were deformed in compression under anhydrous conditions in a Paterson gas-medium apparatus at 1150–1300°C, an oxygen fugacity buffered at Ni/NiO, and confining pressures of 300 or 450 MPa (protoenstatite or orthoenstatite fields). Mechanical data suggest a transition from diffusion to dislocation
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Low δ18O and δ30Si TTG at ca. 2.3 Ga Hints at an Intraplate Rifting Onset of the Paleoproterozoic Supercontinent Cycle J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-03-11 Yanyan Zhou, Mingguo Zhai, Ross N. Mitchell, Peter A. Cawood, Guangyu Huang, Christopher J. Spencer, Mimi Chen, Yibing Li, Taiping Zhao, Tengfei Wu
The start of the Paleoproterozoic supercontinent cycle is typically taken as the initiation of orogenesis at ca. 2.1 Ga leading to the assembly of Earth's first supercontinent, Columbia. However, the dearth of ca. 2.5–2.2 Ga geological records makes it difficult to deduce tectonic factors during the onset of the Paleoproterozoic supercontinent cycle. The petrogenesis of tonalite–trondhjemite–granodiorite
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Sensitivity of GNSS-Derived Estimates of Terrestrial Water Storage to Assumed Earth Structure J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-03-11 Matthew J. Swarr, Hilary R. Martens, Yuning Fu
Geodetic methods can monitor changes in terrestrial water storage (TWS) across large regions in near real-time. Here, we investigate the effect of assumed Earth structure on TWS estimates derived from Global Navigation Satellite System (GNSS) displacement time series. Through a series of synthetic tests, we systematically explore how the spatial wavelength of water load affects the error of TWS estimates
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A New Negative Carbon Isotope Interval Caused by Manganese Redox Cycling After the Shuram Excursion J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-03-08 Bin Zhang, Jian Cao, Kai Hu, Zhiwei Liao, Ruijie Zhang, Yi Zhang, Chunhua Shi, Kurt O. Konhauser
Several negative C isotope excursions (CIEs) occurred at the end of the Neoproterozoic era which have been generally attributed to the oxidation of organic carbon using sulfate as the terminal electron acceptor and the subsequent release of 13C-depleted dissolved inorganic C (DIC). Based on new analyses from the Doushantuo Formation in South China, we observe a negative C isotope excursion right after
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Intermittent Criticality Multi-Scale Processes Leading to Large Slip Events on Rough Laboratory Faults J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-03-07 Grzegorz Kwiatek, Patricia Martínez-Garzón, Thomas Goebel, Marco Bohnhoff, Yehuda Ben-Zion, Georg Dresen
We discuss data of three laboratory stick-slip experiments on Westerly Granite samples performed at elevated confining pressure and constant displacement rate on rough fracture surfaces. The experiments produced complex slip patterns including fast and slow ruptures with large and small fault slips, as well as failure events on the fault surface producing acoustic emission bursts without externally-detectable
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Robust Imaging of Fault Slip Rates in the Walker Lane and Western Great Basin From GPS Data Using a Multi-Block Model Approach J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-03-07 William C. Hammond, Corné Kreemer, Geoffrey Blewitt
The Walker Lane (WL) in the western Great Basin (GB) is an active plate boundary system accommodating 10%–20% of the relative tectonic motion between the Pacific and North American plates. Its neotectonic framework is structurally complex, having hundreds of faults with various strikes, rakes, and crustal blocks with vertical axis rotation. Faults slip rates are key parameters needed to quantify seismic
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Inverting Geodetic Strain Rates for Slip Deficit Rate in Complex Deforming Zones: An Application to the New Zealand Plate Boundary J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-03-08 Kaj M. Johnson, Laura M. Wallace, Jeremy Maurer, Ian Hamling, Charles Williams, Chris Rollins, Matt Gerstenberger, Russ Van Dissen
The potential for future earthquakes on faults is often inferred from inversions of geodetically derived surface velocities for locking on faults using kinematic models such as block models. This can be challenging in complex deforming zones with many closely spaced faults or where deformation is not readily described with block motions. Furthermore, surface strain rates are more directly related to
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Numerical Simulation of the Self-Organizational Origin of Concentrically Zoned Aggregates of Siderite and Pyrite in Sediment-Hosted Massive Sulfide Deposits J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-03-08 Wenhong Johnson Qiu, Mei-Fu Zhou, Anthony E. Williams-Jones
Concentrically zoned pyrite aggregates (CZPA) are common in sediment-hosted massive sulfide (SHMS) deposits and have been widely used to interpret the ore-forming processes. There is considerable uncertainty, however, over the formation of aggregates that are oscillatorily zoned and contain randomly-orientated pyrite microcrystals. Guided by the results of examination of the micro-textures of CZPA
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Rift Propagation Interacting With Pre-Existing Microcontinental Blocks J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-03-08 Jiarong Qing, Jie Liao, Sascha Brune
Rift propagation is a 3D thermo-mechanical process that often precedes continental breakup. Pre-existing microcontinental blocks and the associated lithospheric strength heterogeneities influence the style of rift propagation. Interestingly, some rifts propagate into pre-existing blocks and eventually cut through them (e.g., the Zhongsha Block and the Reed Bank), while others bypass these microcontinental
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A Continental Model of Curie Point Depth for China and Surroundings Based on Equivalent Source Method J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-03-08 Yu Lei, Liguo Jiao, Qinghua Huang, Jiyao Tu
The Curie Point Depth (CPD) marks a significant temperature boundary (∼580°C) within the Earth's lithosphere. However, there has been ongoing debate regarding its spatial distribution. In this research, we utilized the Equivalent Source Method (ESM) based on Gauss-Legendre integration and data obtained from the EMM2017 model, along with a five-layer susceptibility model, to generate a 0.5° × 0.5° grid
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Thermal Stressing of Volcanic Rock: Microcracking and Crack Closure Monitored Through Acoustic Emission, Ultrasonic Velocity, and Thermal Expansion J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-03-05 L. Griffiths, M. J. Heap, O. Lengliné, P. Baud, J. Schmittbuhl, H. A. Gilg
Microcracking due to thermal stresses affects the mechanical and flow properties of rocks, which is significant for thermally dynamic environments such as volcanoes and geothermal reservoirs. Compared with other crustal rocks like granite, volcanic rocks have a complex and variable response to temperature; it remains unclear how thermal microcracks form and how they are affected by temperature. We
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Pseudo-Prospective Forecasting of Induced and Natural Seismicity in the Hengill Geothermal Field J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-03-05 V. A. Ritz, L. Mizrahi, V. Clasen Repollés, A. P. Rinaldi, V. Hjörleifsdóttir, S. Wiemer
The Hengill geothermal field, located in southwest Iceland, is host to the Hellisheiði power plant, with its 40+ production wells and 17 reinjection wells. Located in a tectonically active area, the field experiences both natural and induced seismicity linked to the power plant operations. To better manage the risk posed by this seismicity, the development of robust and informative forecasting models
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Impact of Ancient Tectonics on Intracontinental Deformation Partitioning: Insights From Crustal Structures of the East Junggar-Altai Area J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-03-05 Xusong Yang, Xiaobo Tian, Bo Wan, Huaiyu Yuan, Liang Zhao, Wenjiao Xiao
Compressive stress generated at collision fronts can propagate over long distances, inducing deformation within the continent's interior. Nevertheless, the factors governing the partitioning of intracontinental deformation remain enigmatic. The Altai Mountains serve as a type-example of ongoing intracontinental deformation. Here, we investigate the crustal architecture of the Chinese Altai Mountains
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Ocean Bottom Distributed Acoustic Sensing for Oceanic Seismicity Detection and Seismic Ocean Thermometry J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-03-07 Zhichao Shen, Wenbo Wu
A T-wave is a seismo-acoustic wave that can travel a long distance in the ocean with little attenuation, making it valuable for monitoring remote tectonic activity and changes in ocean temperature using seismic ocean thermometry (SOT). However, current high-quality T-wave stations are sparsely distributed, limiting the detectability of oceanic seismicity and the spatial resolution of global SOT. The
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Fracturing and Dome-Shaped Surface Displacements Above Laccolith Intrusions: Insights From Discrete Element Method Modeling J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-03-05 A. Morand, S. Poppe, C. Harnett, A. Cornillon, M. Heap, D. Mège
Inflation of viscous magma intrusions in Earth's shallow crust often induces strain and fracturing within heterogeneous host rocks and dome-shaped ground deformation. Most geodetic models nevertheless consider homogeneous, isotropic, and linear-elastic media wherein stress patterns indicate the potential for failure, but without simulating actual fracturing. We present a two-dimensional Discrete Element
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Phase Relation and Equation of State of Iron-Titanium Oxyhydroxides With α-PbO2 Type Crystal Structure at Deep Mantle Conditions J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-03-04 Kyoko N. Matsukage, Yu Nishihara, Yoshinori Tange, Yuji Higo
Phase relation and equation of state of iron-titanium oxyhydroxide with α-PbO2-type crystal structure (hydrous α-phase) was investigated at pressure from middle upper mantle to mantle transition zone. The experiments were performed using multi-anvil apparatus with in situ synchrotron X-ray diffraction. The metal-diamond sample container was used to maintain a closed system with respect to water while
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Deciphering Contribution of Recycled Altered Oceanic Crust to Arc Magmas Using Ba-Sr-Nd Isotopes J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-03-04 Yuxiang Zhang, Yunchao Shu, Simon Turner, Zuxing Chen, Zhigang Zeng, Fang Huang
Altered oceanic crust (AOC) plays a critical role in geochemical recycling in subduction zones. However, identifying contributions of subducted AOC to arc magmas remains a conundrum due to the lack of effective tracers. Here, we investigate the Ba-Sr-Nd isotopic compositions of lavas from the Mariana arc and back-arc. Based on a statistical analysis of the Sr-Nd isotopes for global arc volcanoes, we
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Effects of Stress-Driven Melt Segregation on Melt Orientation, Melt Connectivity and Anisotropic Permeability J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-03-04 James Bader, Wenlu Zhu, Laurent Montési, Chao Qi, Benoit Cordonnier, David Kohlstedt, Jessica Warren
Stress-driven melt segregation may have important geochemical and geophysical effects but remains a poorly understood process. Few constraints exist on the permeability and distribution of melt in deformed partially molten rocks. Here, we characterize the 3D melt network and resulting permeability of an experimentally deformed partially molten rock containing several melt-rich bands based on an X-ray
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A Thermodynamically Based Modified Cam-Clay Model for Post-Bifurcation Behavior of Deformation Bands J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-03-04 Qingpei Sun, Xiao Chen, Klaus Regenauer-Lieb, Manman Hu
Compaction bands are a type of localized deformation that can occur as diffuse or discrete bands in porous rocks. While modeling of shear bands can replicate discrete and diffusive bands, numerical models of compaction have so far only been able to describe the formation of discrete compaction bands. In this study, we present a new thermodynamic approach to model compaction bands that is able to capture
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The Timescale and Carbon Flux Recorded by Skarn Garnet From Gangdese Arc, Southern Tibet J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-03-02 Zhenhao Zhou, Xu Chu, Junxing Chen
Contact metamorphism of carbonate rocks in response to fluid infiltration releases carbon dioxide (CO2), potentially affecting Earth's carbon budget over geological timescales. This process was notably active in the Cretaceous when the closure of the Neo-Tethys Ocean led to extensive arc magmatism in southern Tibet, coincident with a greenhouse climate interval. These arc plutons intersected carbonate
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Thousand-Kilometer DAS Array Reveals an Uncatalogued Magnitude-5 Dynamically Triggered Event After the 2023 Turkey Earthquake J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-03-02 Qiushi Zhai, Zhongwen Zhan, J. Andres Chavarria
Large earthquakes can trigger smaller seismic events, even at significant distances. The process of earthquake triggering offers valuable insights into the evolution of local stress states, deepening our understanding of the mechanisms of earthquake nucleation. However, our ability to detect these triggered events is limited by the quality and spatial density of local seismometers, posing significant
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Lithospheric Structure and Melting Processes in Southeast Australia: New Constraints From Joint Probabilistic Inversions of 3D Magnetotelluric and Seismic Data J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-03-02 M. C. Manassero, S. Özaydın, J. C. Afonso, J. J. Shea, I. S. Ezad, A. Kirkby, S. Thiel, I. Fomin, K. Czarnota
The thermochemical structure of the lithosphere controls melting mechanisms in the mantle, as well as the location of volcanism and ore deposits. Obtaining reliable images of the lithosphere structure, and its complex interactions with the asthenosphere, requires the joint inversion of multiple data sets and their associated uncertainties. In particular, the combination of seismic velocity and electrical
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Equation of State of Liquid Fe7C3 and Thermodynamic Modeling of the Liquidus Phase Relations in the Fe-C System J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-03-02 Shunpei Yokoo, Koichiro Umemoto, Kei Hirose
We calculated the pressure-volume relations of liquids Fe and Fe7C3 up to ∼360 GPa and 3000–8000 K based on the first-principles molecular dynamics simulations. The results demonstrate that liquid Fe7C3 is similar in compressibility and thermal expansivity to liquid Fe at the Earth's core pressure range. We then obtained a thermodynamic model of the liquidus phase relations in the Fe-C system at high
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Seismological Constraints on the Causes of Intraplate Earthquakes in Yangjiang Region, South China J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-02-29 Lun Li, Jinming Zhang, Xuzhang Shen, Xiaona Wang, Jialong He, Lingfeng Zhao, Zhihui Deng, Rui Gao
Large earthquakes that occur away from plate boundaries (i.e., large intraplate earthquakes), though rare, could cause heavy damage. Understanding their causes could help with seismic hazard assessment. In this study, we image the seismogenic structure under the 1969 Ms6.4 Yangjiang intraplate earthquake within the stable South China Block with a high-resolution three-dimensional shear-wave velocity
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Glacier Melting Triggers Massive Gravel Deposition in Central Italy's River Basins, Unveiling Deglacial Events From 1250 to 780 ka J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-02-28 F. Florindo, F. Marra, B. R. Jicha, F. Bulian, A. Di Chiara, P. Srivastava
The purpose of this study was to prove the direct correlation of a successions of gravel-clay beds recovered in borehole with the melt-water pulses associated with the sea-level oscillations indicated in the δ18O record in the time-span preceding the 100-kyr glacial cycles. Aimed at this scope, we provide combined 40Ar/39Ar and paleomagnetic constraints to a set of seven aggradational successions recovered
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On the Effect of 3D Wave Propagation on 2D Regional-Scale Velocity Model Building J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-02-29 Andrzej Górszczyk, Romain Brossier, Ludovic Métivier
Active seismic surveys are routinely employed by academia to study geological structure of the crust and upper mantle. Wavefields generated during these surveys are sampled at the receiver locations, but the wave-paths traveled from a source to a sensor remains unknown. Although seismic acquisition layouts designed to investigate complex crustal-scale environments are often two-dimensional, the seismogram
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Seasonal Modulation of Crustal Seismicity in Northeastern Japan Driven by Snow Load J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-02-29 Taku Ueda, Aitaro Kato, Christopher W. Johnson, Toshiko Terakawa
Numerous studies have reported that surface hydrological loading can seasonally modulate seismicity rates at crustal depths. For example, substantial winter snow accumulation occurs across the Japanese Islands, and these snowy regions appear to have seasonally modulated the occurrence of previous large inland earthquakes. Therefore, it is important to investigate the impact of seasonal stress changes
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Depth of Sudden Velocity Changes Derived From Multi-Mode Rayleigh Waves J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-02-29 C. Finger, K. Löer
To integrate structural subsurface models and smooth seismic velocity models, they need to share common features and resolutions. Here, we propose a new approach, Depth Assessment from Rayleigh Wave Ellipticities (DARE), for estimating the depth of sudden velocity changes from ambient-noise multi-mode Rayleigh waves applicable to a wide range of frequencies. At frequencies where multi-mode Rayleigh
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High-Resolution Imaging of the Alaska-Aleutian Megathrust Using P-to-S Mode Conversions From Local In-Slab Earthquakes J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-02-28 Kiara A. Daly, Geoffrey A. Abers
The top of the subducting plate is a thick, complex zone where the heterogeneous structure likely controls earthquake rupture processes. Imaging this heterogeneous channel typically involves active-source methods with limited depth penetration, or low-resolution teleseismic methods. To access short wavelengths at greater depth, we use high-frequency P-to-S (PS, 1–15 Hz) mode-converted arrivals from
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Tectono-Stratigraphic Evolution of the Kerguelen Large Igneous Province: The Conjugate William’s Ridge-Broken Ridge Rifted Margins J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-02-27 L. Magri, J. M. Whittaker, M. F. Coffin, K. Hochmuth, D. Gürer, S. Williams, G. Bernardel, G. Uenzelmann-Neben
Extensive investigation of continental rift systems has been fundamental for advancing the understanding of extensional tectonics and modes of formation of new ocean basins. However, current rift classification schemes do not account for conjugate end members formed by Large Igneous Province crust, referring to thick mafic crust, sometimes including continental fragments. Here, we investigate the rifting
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On the Unloading-Induced Fault Reactivation: The Effect of Stress Path on Failure Criterion and Rupture Dynamics J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-02-26 Peng Dong, Ying Xu, Ran Xu, Kaiwen Xia, Jianbing Peng
Fault reactivations induced by deep excavation can pose significant challenges to underground construction or resource extraction. Laboratory experiments on rock faults demonstrate that unloading-induced fault reactivations obey the Coulomb failure criterion derived from loading-induced events. However, the effect of stress path during unloading on the failure criterion and rupture dynamics of fault
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Mantle Structure Beneath the Damara Belt in South-Central Africa Imaged Using Adaptively Parameterized P-Wave Tomography J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-02-26 Hesam Saeidi, Samantha E. Hansen, Andrew A. Nyblade, Ryan Haag
Many seismic tomography studies have indicated that the African Large Low Velocity Province (LLVP) extends from the lower mantle beneath southern Africa into the upper mantle beneath eastern Africa; however, it has been questioned whether the LLVP structure may also extend to the north or northwest beneath south-central Africa. Debates regarding the upper mantle structure beneath the Damara Belt contribute
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Issue Information J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-02-26
No abstract is available for this article.
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Fracture Morphology Influencing Supersonic CO2 Transport: Application in Geologic CO2 Sequestration J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-02-24 Woojong Yang, Weon Shik Han, Taehoon Kim, Jong Gil Park, Kue-Young Kim, Young Jae Shinn
Geologic carbon sequestration requires CO2 injection into the storage formation at high-injecting pressure. Such high pressure could induce choked flow accompanying huge variations in thermodynamic properties of CO2 at a converging-diverging (CD) fractures in the storage formation. In this study, high-velocity CO2 transport through CD fractures was investigated to quantify the effect of fracture morphology
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Spatiotemporal Variations and Postseismic Relaxation Process Around Mt. Fuji, Japan, During and After the 2011 Tohoku-Oki Earthquake J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-02-21 Y. Kakiuchi, H. Nimiya, T. Tsuji
To monitor the volcanoes at a high spatiotemporal resolution, we introduce the singular value decomposition-based Wiener filter and the three-component waveforms in ambient noise velocity monitoring. The continuous ambient noise data from 63 stations around Mt. Fuji and Mt. Hakone, Japan, during the January-September 2011 were analyzed to estimate the seismic velocity variations at a 1-day temporal
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Can Geometric Parameters Enable Direct Prediction of Non-Fickian Transport in Rock Fractures Across Diverse Flow Regimes? J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-02-21 Jia-Qing Zhou, Li-Guo Guo, Jiu Jimmy Jiao, Xin-Yu Jiang, Xin Luo
Anomalous solute migrations in fractured rocks are governed by geometric characteristics and flow regimes. Although existing inverse models can describe this behavior, the underlying physics for quantifying key transport coefficients remains largely unexplored. Here, we investigate the quantitative impacts of geometric heterogeneity and flow regimes on solute transport in rock fractures. We conduct
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The Matrix Profile in Seismology: Template Matching of Everything With Everything J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-02-20 Nader Shabikay Senobari, Peter M. Shearer, Gareth J. Funning, Zachary Zimmerman, Yan Zhu, Philip Brisk, Eamonn Keogh
Template matching has proven to be an effective method for seismic event detection, but is biased toward identifying events similar to previously known events, and thus is ineffective at discovering events with non-matching waveforms (e.g., those dissimilar to existing catalog events). In principle, this limitation can be overcome by cross-correlating every segment (possible template) of a seismogram
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Estimation of Seismic Attenuation and Gas Hydrate Concentration From Surface Seismic Data at Hydrate Ridge, Cascadia Margin J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-02-20 Tao Liu, Xueyang Bao, Jianhua Geng, Xiangyu Zhu, Anyu Li, Dongmei Tian
An improved understanding of the effects of gas hydrate presence on seismic attenuation is important for accurate hydrate characterization and quantification. Based on a rock-physics model recently presented for gas hydrate-bearing fine-grained clay-dominated sediments, here we establish an integrated workflow for surface seismic data from extracting seismic attenuation to estimating gas hydrate concentration
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Molybdenum Isotopic Signatures of Forearc Serpentinites: Origin and Contribution to the Subduction Zone Mo Cycle J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-02-19 Xiaohui Li, Sanzhong Li, Shuo Chen, Jingjing Fan, Jie Li, Weigang Peng, Kun Guo, Long Chen
Serpentinites, as important reservoirs for volatile and fluid-mobile elements, have been increasingly recognized as playing a critical role in global geochemical cycles. However, direct evidence for their dominance in the molybdenum (Mo) cycle in subduction zones has been elusive. Here, we address this issue by comprehensively investigating the Mo isotope systematics of serpentinites and accompanying
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Impacts of Rate of Change in Effective Stress and Inertial Effects on Fault Slip Behavior: New Insights Into Injection-Induced Earthquakes J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-02-19 Zihan Sun, Derek Elsworth, Guanglei Cui, Yingchun Li, Aiyu Zhu, Tianyu Chen
Understanding the physical mechanisms which link fluid injection with triggered earthquakes is critical in minimizing hazard in subsurface fluid-injection operations. Currently, injection-induced changes in effective stress on faults are considered as the main criterion in triggering seismic fault slip. However, rate of change in effective stress, together with inertial effects, are also be implicated
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GRACE and GRACE Follow-On Gravity Observations of Intermediate-Depth Earthquakes Contrasted With Those of Shallow Events J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-02-19 Shin-Chan Han, Jeanne Sauber, Taco Broerse, Fred Pollitz, Emile Okal, Taehwan Jeon, Ki-Weon Seo, Richard Stanaway
Earthquakes involve mass redistribution within the solid Earth and the ocean, and as a result, perturb the Earth's gravitational field. For most of the shallow (<60 km) earthquakes with Mw > 8.0, the GRACE satellite gravity measurements suggest considerable volumetric disturbance of rocks. At a spatial scale of hundreds of km, the effect of volumetric change exceeds gravity change by vertical deformation;
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On the Derivation of Closed-Form Expressions for Displacements, Strains, and Stresses Inside Poroelastic Reservoirs J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-02-19 P. Cornelissen, B. J. Meulenbroek, J. D. Jansen
We critically review the derivation of closed-form analytical expressions for elastic displacements, strains, and stresses inside a subsurface reservoir undergoing pore pressure changes using inclusion theory. Although developed decades ago, inclusion theory has been used recently by various authors to obtain fast estimates of depletion-induced and injection-induced fault stresses in relation to induced
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Non-Linear Seismic Velocity Variations Observed During a Seismic Swarm in the Alto Tiberina Low Angle Normal Fault From Ambient Noise Correlation Measurements J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-02-16 Nour Mikhael, Piero Poli, Stéphane Garambois
From seismic interferometry, we investigate the strain sensitivity to seismic velocity variations related to a seismic swarm activity that occurred in 2013 along the Alto Tiberina low angle normal fault. We compute daily auto-correlation functions of ambient noise recorded at seismic stations located in the vicinity of the fault over the course of 10 years. Using the stretching technique, we compute
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Seismic Anisotropy of Mafic Blueschists: EBSD-Based Constraints From the Exhumed Rock Record J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-02-15 Jason N. Ott, Cailey B. Condit, Vera Schulte-Pelkum, Rachel Bernard, Matej Pec
Seismic anisotropy constitutes a useful tool for imaging the structure along the plate interface in subduction zones, but the seismic properties of mafic blueschists, a common rock type in subduction zones, remain poorly constrained. We applied the technique of electron backscatter diffraction (EBSD) based petrofabric analysis to calculate the seismic anisotropies of 14 naturally deformed mafic blueschists
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Source Parameter Scaling Relations for Shallow Crustal Earthquakes: Exploration With the Single Asperity Model J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-02-16 Shota Shimmoto
Understanding the scaling laws of source parameters is a fundamental subject in seismology. This study conducts spectral ratio analysis to estimate the source parameters for 409 shallow crustal earthquakes with Mw 3.2–6.0 in Japan. Subsequently, the source parameter scaling relations are investigated for a wide magnitude range by combining the results of this and previous studies. The spectral ratio
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Restoration and Transformation: The Response of Shocked and Oxidized Magnetite to Temperature J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-02-14 Bruno Daniel Leite Mendes, Agnes Kontny
Large impact craters on Earth are associated with prominent magnetic anomalies, residing in magnetite of the shocked target rocks and impactites. Shock experiments on magnetite suggest that up to 90% of magnetic susceptibility is lost at pressures >5 GPa, but can be partially restored by post-shock thermal annealing. The magnetic property changes are caused by shock induced grain size reduction and
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First Full-Vector Archeomagnetic Data From Central Asia (3 BCE to 15 CE Centuries): Evidence for a Large Non-Dipole Field Contribution Around the First Century BCE J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-02-15 R. Bonilla-Alba, M. Gómez-Paccard, F. J. Pavón-Carrasco, S. A. Campuzano, E. Beamud, V. Martínez-Ferreras, J. M. Gurt-Esparraguera, E. Ariño-Gil, F. Martín-Hernández, M. L. Osete
Unraveling the short-term behavior of the Earth's past geomagnetic field at regional scales is crucial for understanding its global behavior and, thus, the dynamics of the deep Earth. In this context, obtaining accurate full-vector geomagnetic field records from regions where archeomagnetic data are absent becomes essential. Here, we present the first full-vector archeomagnetic data from Central Asia
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Rotation of the Microplates Within the Plate Boundary in Southwestern United States J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-02-15 J. C. Savage
I investigate the long-term, rigid motions of the 20 microplates identified by McCaffrey (2005, https://doi.org/10.1029/2004jb003307) within the Pacific-North America plate boundary in southwestern United States. Those motions are described by the Euler vectors (Ω0i${\boldsymbol{\Omega }}_{\mathbf{0}}^{\boldsymbol{i}}$ for the ith microplate) given by McCaffrey for each microplate. McCaffrey noticed