Featured
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Formation of oxidized sulfur-rich magmas in Neoarchaean subduction zones
Neoarchaean arc magmas in Superior Province, Canada, were relatively oxidized and sulfur rich, reaching compositions comparable to modern subduction zones by approximately 2.7 Ga, according to analysis of sulfur speciation in zircon-hosted apatite grains.
- Xuyang Meng
- , Adam C. Simon
- & Jeremy P. Richards
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Perspective |
Diverse geochemical conditions for prebiotic chemistry in shallow-sea alkaline hydrothermal vents
The spatial and temporal geochemical variability of alkaline hydrothermal systems in shallow waters could support prebiotic chemical reactions required for the emergence of life.
- Laura M. Barge
- & Roy E. Price
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Article
| Open AccessFraser Island (K'gari) and initiation of the Great Barrier Reef linked by Middle Pleistocene sea-level change
Disruption of sediment flows along the eastern Australia coast due to the Middle Pleistocene formation of Fraser Island set the stage for Great Barrier Reef initiation, according to optically stimulated luminescence and palaeomagnetic dating of sand dunes.
- D. Ellerton
- , T. M. Rittenour
- & X. Zhao
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All Minerals Considered |
Cycles of serpentines
Jörg Hermann suggests that as the process of serpentinization leads to clean energy generation, metal separation and carbon sequestration, it could serve as a natural analogue for a sequential economy.
- Jörg Hermann
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All Minerals Considered |
Diamonds as windows to deep Earth
Delving into recent and historical discoveries, Ananya Mallik explains how diamonds track the workings of the deep Earth that are hidden from view.
- Ananya Mallik
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News & Views |
Chasing supershear earthquakes
In rare and sometimes highly destructive cases, faults rupture faster than the seismic waves generated can travel. A global investigation of earthquake rupture speeds reveals that these events occur much more frequently than previously thought.
- Ryo Okuwaki
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Article |
Global frequency of oceanic and continental supershear earthquakes
Supershear earthquakes occur more frequently than previously thought, as suggested by the identification of four oceanic events from a global analysis of large shallow strike-slip earthquakes.
- Han Bao
- , Liuwei Xu
- & Haijiang Zhang
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Article |
Martian landscapes of fluvial ridges carved from ancient sedimentary basin fill
Numerical simulations of the exhumation of basin-filling river deposits suggest that ridge networks observed in Martian landscapes may represent erosional windows into sedimentary basins on Mars.
- Benjamin T. Cardenas
- , Michael P. Lamb
- & John P. Grotzinger
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Article |
High rates of organic carbon burial in submarine deltas maintained on geological timescales
Organic carbon burial rates in an Upper Cretaceous river delta are similar to those in modern deltas, suggesting that high burial rates can persist over geological timescales in these common settings, according to stratigraphic and geochemical analysis of exhumed delta sediments.
- Sophie Hage
- , Brian W. Romans
- & Stephen M. Hubbard
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Editorial |
Minerals matter
Permeating every aspect of life – and each with a multitude of stories to tell – we celebrate the utility, beauty and wonder of minerals in a new column: all minerals considered.
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Perspective |
Orange hydrogen is the new green
Enhancing natural subsurface hydrogen production through water injection could make a substantial contribution to achieving the low-carbon energy transition that is required to limit global warming.
- F. Osselin
- , C. Soulaine
- & M. Pichavant
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Article
| Open AccessCarbon and sediment fluxes inhibited in the submarine Congo Canyon by landslide-damming
Bathymetric surveys of the submarine Congo Canyon show damming by canyon-flank landslides led to the temporary storage of substantial masses of sediment and organic carbon, interrupting their transport to the deep sea.
- Ed L. Pope
- , Maarten S. Heijnen
- & Morelia Urlaub
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Hydrous peridotitic fragments of Earth’s mantle 660 km discontinuity sampled by a diamond
Hydrous conditions extend across the 660 km discontinuity between Earth’s mantle transition zone and lower mantle, according to analysis of a polyphase mineral inclusion in a gem diamond from the Karowe mine, Botswana
- Tingting Gu
- , Martha G. Pamato
- & Fabrizio Nestola
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Article |
Forest vulnerability to drought controlled by bedrock composition
Spatial variability in forest dieback during the severe drought in California between 2011 and 2017 can be explained by variations in bedrock composition and thus weatherability, according to analyses of the drought responses a series of geologically distinct sites.
- Russell P. Callahan
- , Clifford S. Riebe
- & W. Steven Holbrook
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Article
| Open AccessRapid retreat of Thwaites Glacier in the pre-satellite era
The Thwaites Glacier grounding zone has experienced sustained pulses of rapid retreat over the past two centuries, according to sea floor observations obtained by an autonomous underwater vehicle.
- Alastair G. C. Graham
- , Anna Wåhlin
- & Robert D. Larter
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News & Views |
Plant fingerprints in the deep Earth
The colonization of Earth landmasses by vascular plants around 430 million years ago substantially impacted erosion and sediment transport mechanisms. This left behind fingerprints in magmatic rocks, linking the evolution of Earth’s biosphere with its internal processes.
- Nicolas D. Greber
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Article |
Composition of continental crust altered by the emergence of land plants
Colonization of continents by plants some 430 Myr ago enhanced the complexity of weathering and sedimentary systems, and altered the composition of continental crust, according to statistical assessment of zircon compositions.
- Christopher J. Spencer
- , Neil S. Davies
- & Gui-Mei Lu
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Article |
Deep hydration and lithospheric thinning at oceanic transform plate boundaries
Deep hydration of the upper mantle at transform plate boundaries due to seawater infiltration leads to hydrous melting and lithospheric thinning, according to seismic surveys and thermal modelling of the Romanche transform fault.
- Zhikai Wang
- , Satish C. Singh
- & Milena Marjanović
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Article |
Fluid migration in low-permeability faults driven by decoupling of fault slip and opening
Decoupled fault slip and opening, leading to rapid fluid pressurization after initial failure, drives high-pressure fluid migration in low-permeability faults, according to modelling and in situ observations from a borehole fluid-injection experiment.
- Frédéric Cappa
- , Yves Guglielmi
- & Jens Birkholzer
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News & Views |
Islands on the move
Sea level rise causes barrier islands to migrate landward. Coastal evolution modelling reveals a centennial-scale lag in island response time and suggests migration rates will increase by 50% within the next century, even if sea level were to stabilize.
- Laura J. Moore
- & A. Brad Murray
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Article |
Sedimentary basins reduce stability of Antarctic ice streams through groundwater feedbacks
A machine-learning-based mapping of Antarctic subglacial geology suggests sedimentary basins lie beneath some of the most dynamic ice streams, increasing their vulnerability to rapid ice retreat.
- Lu Li
- , Alan R. A. Aitken
- & Bernd Kulessa
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Article |
Astronomically controlled aridity in the Sahara since at least 11 million years ago
Pulses of Saharan dust have been entering the North Atlantic since at least 11 Ma, a result of astronomically paced cycles between arid and humid conditions in northern Africa, according to a terrigenous input record from an ocean core off west Africa.
- Anya J. Crocker
- , B. David A. Naafs
- & Paul A. Wilson
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Research Briefing |
Geophysical imaging of fluids in the Cascadia subduction zone
Water that has been carried deep into the Earth by oceanic plates in subduction zones, can influence earthquakes and volcanic eruptions. Three-dimensional images of electrical resistivity derived from electromagnetic geophysical data provide new constraints on the distribution, transport, and storage of water in the Cascadia subduction zone.
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Fluid transport and storage in the Cascadia forearc influenced by overriding plate lithology
The lithology of the overriding plate plays a critical role in determining fluid transport in subduction zones, according to magnetotelluric imaging of the impact of the dry, mafic Siletzia terrane on fluids in the Cascadia subduction zone, North America.
- Gary D. Egbert
- , Bo Yang
- & Blake Parris
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Editorial |
Hazard perception
A limited number of earthquakes and volcanoes, primarily located in global north countries, dominate the collective research output on these geohazards. Efforts to improve monitoring at both local and global levels can address this disparity and reduce the associated risk.
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Article |
Lag in response of coastal barrier-island retreat to sea-level rise
Coastal evolution simulations suggest that the modern retreat of coastal barrier islands is controlled by cumulative sea-level rise over the past several centuries and will accelerate by 50% within a century, even if sea-level rise remains at present rates.
- Giulio Mariotti
- & Christopher J. Hein
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Article |
Transient mobilization of subcrustal carbon coincident with Palaeocene–Eocene Thermal Maximum
A change in the style of rifting in the North Atlantic led to carbon fluxes from subcrustal melting that helped trigger the Palaeocene–Eocene Thermal Maximum, according to geochemical analyses of volcanic sequences as well as melting and tectonic modelling.
- Thomas M. Gernon
- , Ryan Barr
- & Martin R. Palmer
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Eruption at basaltic calderas forecast by magma flow rate
Using magma inflow rate improves eruption forecasting on timescales of weeks to months for basaltic caldera systems, compared with using surface deformation alone, according to analysis of 45 unrest case studies and viscoelastic modelling.
- Federico Galetto
- , Valerio Acocella
- & Marco Bagnardi
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Article
| Open AccessGrain-size-evolution controls on lithospheric weakening during continental rifting
A reduction in olivine grain size can cause weakening of mantle lithosphere, facilitating continental rifting, according to coupled grain-size-evolution thermo-mechanical modelling of a mantle dynamics.
- J. B. Ruh
- , L. Tokle
- & W. M. Behr
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Research Briefing |
Aftershocks of megathrust earthquakes undergo a central shutdown and surrounding activation
Megathrust aftershocks can be highly destructive if they strike close to shore. Here, we show that aftershocks on the rupture surface have an initially high rate but shut down within several years, potentially for centuries. However, aftershocks also surround the rupture, where they persist for up to 60 years.
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| Open AccessLower oceanic crust formed by in situ melt crystallization revealed by seismic layering
The lower oceanic crust forms through the accretion of injected melt that cools and crystallizes in situ over hundreds of thousands of years, according to seismic data from the slow-spreading equatorial Mid-Atlantic Ridge.
- Peng Guo
- , Satish C. Singh
- & Erdinc Saygin
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Central shutdown and surrounding activation of aftershocks from megathrust earthquake stress transfer
Seismicity close to the rupture surface can shut down for centuries following a megathrust earthquake, while a much larger area surrounding it is activated for decades, according to numerical modelling of the 2011 Tohoku and other megathrust earthquakes.
- Shinji Toda
- & Ross S. Stein
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Article
| Open AccessRelative sea-level data preclude major late Holocene ice-mass change in Pine Island Bay
The Pine Island Glacier, a locus of ice loss from the modern West Antarctic Ice Sheet, had previously been stable since at least the mid-Holocene, according to records tracking ice extent based on radiocarbon and cosmogenic exposure dating.
- Scott Braddock
- , Brenda L. Hall
- & John Woodward
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High water content of arc magmas recorded in cumulates from subduction zone lower crust
The water content of arc magmas in the lower crust can reach up to 20 wt% during crystallization, according to geochemical analyses of minerals from the Kohistan palaeo-arc, Pakistan, underscoring the role of water in porphyry deposits formation.
- B. M. Urann
- , V. Le Roux
- & E. J. Chin
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News & Views |
Flood basalt buildup warms climate
Flood basalts are connected to Earth’s most extreme environmental crises, yet warming is sometimes observed before surface eruptions. Modelling reveals that a complex buildup of basalt intrusions into the crust releases enough CO2 to cause this pre-eruptive warming.
- Jennifer Kasbohm
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Pulses in silicic arc magmatism initiate end-Permian climate instability and extinction
Pulses of silicic arc magmatism—and associated volatile emissions—helped set the timing and magnitude of the environmental disruptions that caused the end-Permian mass extinction, according to U–Pb zircon dating of silicic volcanic and related tephra sequences in eastern Australia.
- Timothy Chapman
- , Luke A. Milan
- & Jim Crowley
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Intrusions induce global warming before continental flood basalt volcanism
Continental flood basalt emplacement is facilitated by basaltic intrusions, which crystalize and release carbon dioxide leading to pre-eruptive global warming, according to numerical models and a comparison with Deccan Traps and Columbia River Basalt records.
- Xiaochuan Tian
- & W. Roger Buck
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Cyclical geothermal unrest as a precursor to Iceland’s 2021 Fagradalsfjall eruption
Ingression of magmatic gas into a geothermal aquifer generated cyclical deformation and primed the system for the 2021 Fagradalsfjall eruption, Iceland, according to a catalogue of 39,500 precursory earthquakes combined with a poroelastic model.
- Ólafur G. Flóvenz
- , Rongjiang Wang
- & Claus Milkereit
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Thermochemical structure and evolution of cratonic lithosphere in central and southern Africa
Cratons in central and southern Africa exhibit diverse structures, compositions and responses to geodynamic settings, according to a high-resolution thermochemical regional model constructed from land- and satellite-based geophysical observations.
- Juan C. Afonso
- , Walid Ben-Mansour
- & Yingjie Yang
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Sea-level stability over geological time owing to limited deep subduction of hydrated mantle
Accounting for experimental data on hydrous peridotites reduces the estimated water recycled into the deep mantle during subduction and suggests sea-level stability over geological time, according to subduction zone thermopetrological modelling.
- N. G. Cerpa
- , D. Arcay
- & J. A. Padrón-Navarta
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Fluocerite as a precursor to rare earth element fractionation in ore-forming systems
Experiments under simulated hydrothermal conditions suggest that the mineral fluocerite may serve as an intermediate phase that fractionates the rare earth elements in ore-forming systems.
- Andrew C. Strzelecki
- , Artas Migdisov
- & Xiaofeng Guo
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Article
| Open AccessSlab-derived devolatilization fluids oxidized by subducted metasedimentary rocks
Metasedimentary rocks atop the downgoing slab oxidize ascending slab-derived dehydration fluids by removing reduced species, according to petrological analysis of subduction complex metasedimentary rocks and reactive transport modelling.
- Jay J. Ague
- , Santiago Tassara
- & Timm John
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Correspondence |
Estimating pi using geoscience
- Fabian B. Wadsworth
- , Jérémie Vasseur
- & Lucía Pérez-Díaz
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Perspective |
Confronting the water potential information gap
Continuous and discoverable observations of water potential could vastly improve understanding of biophysical processes throughout the soil–plant–atmosphere continuum and are achievable thanks to recent technological advances.
- Kimberly A. Novick
- , Darren L. Ficklin
- & Jeffrey D. Wood
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Instability of the African large low-shear-wave-velocity province due to its low intrinsic density
The seismic anomaly in the lowermost mantle beneath Africa is greater in height and less stable than its Pacific counterpart because of its lower density, according to numerical simulations of the anomalies as thermochemical piles.
- Qian Yuan
- & Mingming Li
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Earth’s Great Oxidation Event facilitated by the rise of sedimentary phosphorus recycling
Recycling of sedimentary phosphorus driven by increasing oceanic sulfide availability contributed to the persistent oxygenation of Earth’s atmosphere, according to analysis of Archean drill-core samples and biogeochemical modelling
- Lewis J. Alcott
- , Benjamin J. W. Mills
- & Simon W. Poulton
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Surface characteristics of the Zhurong Mars rover traverse at Utopia Planitia
Analysis of interactions between the wheels of the Zhurong rover and the terrain along the rover’s traverse reveals soils with high bearing strength and cohesion.
- L. Ding
- , R. Zhou
- & K. Di