Showing papers in "Earth and Planetary Science Letters in 2022"

TL;DR: The 15 January 2022 Hunga, Tonga, volcano's explosive eruption produced the most powerful blast recorded in the last century, with an estimated equivalent TNT yield of 100-200 megatons as mentioned in this paper .

TL;DR: In this paper , the authors combine geophysical observations, including high-quality seismic data acquired with the InSight mission, with a cosmochemical model to constrain the composition of Mars, and find that the liquid core is made up of 88.4±3.9 wt% Fe-Ni-Co with light elements making up the rest.

TL;DR: In this paper, the primordial distribution of volatiles resulting from degassing of the Earth's magma ocean (MO) is defined by means of solubility laws, extrapolated to high temperatures and over a large range of redox conditions.

TL;DR: In this paper , the primordial distribution of volatiles resulting from degassing of the Earth's magma ocean (MO) is defined by means of solubility laws, extrapolated to high temperatures and over a large range of redox conditions.

TL;DR: In this paper , the authors analyzed broadband and low-frequency events recorded on Mars and made the first detection of horizontally polarized shear wave reflections, which help constrain the crustal structure at NASA's InSight lander site.

TL;DR: The Ediacaran Shuram carbon isotope excursion (CIE) follows the regional Gaskiers glaciation and occurs before the appearance of macroscopic animal fossils as discussed by the authors .

TL;DR: In this paper , the authors measured the abundance of both sedimentary five-to six-ring polycyclic aromatic hydrocarbons (PAHs) and mercury from strata deposited in shallow marine environments across the ETE at the GSSP Kuhjoch section in Austria and St Audrie's Bay section in the UK.

TL;DR: In this paper , high-resolution Hg concentration data for four UKW-FFB sections (Walnut Creek and Dupont-GHS in the U.S.A., and Yangdi and Nandong in South China) and Hg isotope data for two of them were used to test the geographic distribution and stratigraphic range of volcanic inputs during the Frasnian-Famennian transition.

TL;DR: In this article , the authors estimate stress distribution from interseismic locking models and derive earthquake scenarios along the Anninghe fault in Sichuan, China, by conducting dynamic rupture simulations.

TL;DR: In this paper , the authors use numerical models driven by the internal force balance of a subduction system to better understand the (geo)dynamics governing (intra-oceanic) polarity-reversal subduction zone initiation.

TL;DR: In this article , the authors reconstruct NW Pacific-Izanagi plate tectonics since Cretaceous times by mapping and structurally restoring (i.e. unfolding) the subducted western Pacific slabs from regional and global tomography, and re-creating the vanished Izanagi plate as its conjugate rift flank.

TL;DR: In this article , the authors used the distribution of low-Lu and lowLu/Dy zircons, derived from the eroded roots of mountains, to identify periods of extensive high mountain (supermountain) formation.

TL;DR: In this paper , the age distribution of detrital zircon populations in sedimentary basins is determined based on the fertility and heterogeneity of source rocks and a modified χ 2 -distribution analysis of age population modality and dispersion.

TL;DR: In this paper , a high-precision earthquake catalog using a machine-learning phase picker and the template matching method was built to understand the space-time evolution of the foreshock sequence and its relationship to the mainshock nucleation.

TL;DR: In this paper , density functional theory (DFT) calculations were performed to determine the thermal conductivity and resistivity of solid FeSi alloys with two compositions, 4 mol % and 15 mol % Si, at a range of temperatures (850-4350 K) and pressures (60-144 GPa) for ease of comparison with recent directly measured κ values.

TL;DR: In this article , the authors used synthetic aperture radar data acquired between 2014 and 2021 by Sentinel-1 satellites to investigate the present-day strain accumulation on the Haiyuan fault system.

TL;DR: In this paper , the authors report evidence of a unique Saturn-orbiting impactor population, distinct from any previously described source population, identified through global mapping and analysis of the elliptical crater populations on Saturn's moons Tethys and Dione.

TL;DR: In this paper , the authors present compositions for ocean crust partial melts and partition coefficients for sediment melting based on existing experiments, physical models, and arc data, that can be used in geochemical models of arc volcanism.

TL;DR: Using petrochronology and phase equilibrium modeling, this paper demonstrated that subduction initiated prior to 102−100 Ma at a slow rate (< 1 cm/yr). Subduction stagnated at relatively warm conditions (15−20 °C/km) for > 5 Myr before evolving into a faster (≥ 2−5 cm/r) and colder (∼7 °C /km) self-sustained regime.

TL;DR: In this article , a model for surface deformation linked to the evolution of a subvolcanic chamber was presented, showing that the magnitude of surface velocities associated with crystallization and second boiling should not exceed ∼1 mm/yr unless the cooling rate is substantially elevated above normal conductive cooling rates.

TL;DR: In this paper , the shape of the southeastern margin of the Tibetan plateau has remained unchanged for the last 10 Myr despite vast amounts of exhumation, which has important implications for our understanding of the evolution of Earth's climate and biodiversity in the recent geological past.

TL;DR: In this article, a model for surface deformation linked to the evolution of a subvolcanic chamber was presented, showing that the magnitude of surface velocities associated with crystallization and second boiling should not exceed ∼1 mm/yr unless the cooling rate is substantially elevated above normal conductive cooling rates.

TL;DR: In this paper , a model of the effect of individual solid Earth mechanisms on eustatic change over the past 560 Myr, including time-dependent continental and oceanic dynamic topography, volume above oceanic trenches and changing continental slope, is presented.

TL;DR: In this article , the authors analyzed the 2003-2014 space-time variations of the Earth's gravity gradients derived from three datasets of GRACE geoid models over a large region surrounding the rupture zone of the Mw 8.8 Maule earthquake.

TL;DR: In this article , the authors apply a geochemical proxy approach for crustal thickness estimates to detrital syntectonic deposits of the Santa Maria Conglomerate derived from the Aconcagua stratovolcano to reconstruct the Andes at this latitude.

TL;DR: In this paper , high-precision U-Pb zircon dates from the Ecca Group are coeval across the Karoo and these intrusions were coeval with the TOAE, suggesting a causative link.

TL;DR: In this article , the systematics of stable Ca isotopes in ocean island basalts and mid-ocean ridge basalts were explored by probing mantle heterogeneity by exploring their systematics.

TL;DR: In this paper , a reconstruction of the intensity of terrestrial chemical weathering for the last 2.7 billion years, based on coupled neodymium-hafnium isotope (Δ ε Hf(i)CLAY ) and elemental analyses of the fine-grained clay-size fraction of shales, is presented.

TL;DR: In this article , a model for describing the size-frequency scaling and the temporal evolution of seismicity is proposed starting from simple assumptions, and the parameter describing how the number of earthquakes decreases after a major seismic event, p, turns out to be positively correlated to the exponent of the frequency-size distribution of the seismicity, b, and related to tectonics.