A new hypothesis suggests that large bolides pierced early thin lithosphere, causing massive partial melting and forming cratonic crust. This process is thought to have occurred on a Venus-like Earth, which preserved a more complete geological record of its infancy.
A team of German scientists challenges the theory that a large mantle plume played a dominant role in the break-up of the super-continent Gondwana. Seismic measurements reveal that the impact of the mantle plume on the continental crust is surprisingly small.
Research by Franz Neubauer and Fariba Kargaranbafghi reveals lithospheric thinning associated with the formation of a metamorphic core complex in the Central Iranian plateau. The study suggests that this process was linked to extension, upwelling of hot asthenosphere, and subsequent uplift of the plateau.
Two new studies shed light on the Himalayan tectonic system, confirming a strike-slip dominated fault in western Nepal and highlighting topographic and tectonic discontinuities. The findings also support the initiation of mountain belt-parallel extension in the mid-Miocene epoch.
Research sheds light on the kinematic evolution of the Himalayan orogen, uncovering cryptic thrust-sense discontinuities that help understand processes in continent-continent convergent margins. The Klamath Mountains' unroofing process is also explored, revealing a new mechanism to produce plate margin orogens.
A recent study by Kristin Morell and colleagues reveals the Himalayan Front's central seismic gap is overdue for a major earthquake. The researchers used geomorphic and erosion rate data to define the active detachment fault likely to host a large earthquake, pinpointing a distinctive physiographic transition in Uttarakhand, India.
A team of researchers from GFZ explains possible barriers for the ascent of mantle plumes and resolves major conflicts surrounding present model predictions. They found that low-buoyancy thermochemical plumes can develop, preventing massive volcanism and environmental catastrophes.
Researchers document fault rocks surrounding New Zealand's active Alpine Fault, recording slip rates and influencing earthquake processes. The study provides insights into the complex fault rock sequence resulting from past earthquakes, with potential applications for realistic ground shaking predictions.
Seismic investigations reveal extreme mantle perturbation and crust-mantle interaction in Eastern China's Qinling-Dabie-Sulu orogenic belt. The region was affected by compressional deformation due to collision between North and South China blocks.
Three tectonic processes, including uplift, reduced solar irradiation, and an axis shift, created conditions for Greenland's glaciation. The interaction of these processes, driven by the Iceland plume, led to the formation of ice on Greenland.
A new study published in the journal Geology challenges traditional views on tectonics by showing that Pacific plate deforms and contracts horizontally due to cooling. The research suggests a significant shortening of the oceanic plates, which can lead to intraplate earthquakes.
Scientists develop new avalanche monitoring method using infrasound detectors to detect and track deadly snow slides. A community-driven framework for climate reconstructions aims to study the past 2000 years' paleoclimate.
A new rock formation, Tava sandstone, has been discovered in the Colorado Rockies, featuring an unusual relationship with older rocks. The formation is believed to have resulted from large earthquakes or other catastrophic events, and its age dates back to ~750 million years ago during the Cryogenian Period.
Researchers at Rice University and the University of Nevada have found that cooling of the Pacific plate causes horizontal contraction and deformation. The rate of contraction is faster in younger parts of the plate, leading to a predicted 10 times faster contraction than older parts.
New research by Steve Israel and colleagues reveals that the Northern Cordillera is a 'collage' of terranes with shared histories, blurring the definition of tectonic terranes. This challenges long-held assumptions about the geologic history of North America.
Researchers used physical analog models to simulate Ganymede's geologic structures, finding that stretching forces created characteristic patterns of ridges and troughs. The study suggests that a process involving crustal breaks due to large amounts of extension is the primary mechanism for forming these features.
Two articles investigate influence of climate, erosion, and tectonics on Bolivian Andes landscape. Researchers conclude that tectonics play primary role in shaping Earth's surface, not rainfall patterns. Tectonic deformation controls pattern of rock uplift and erosion rates.
Scientists have discovered a late Triassic tectono-thermal event in southern Mexico, synchronous with a magmatic arc hiatus, suggesting flat-slab subduction. Additionally, research has found evidence of giant mantle plume activity in ancient Australia and Argentina, providing insight into the Earth's thermal structure.
Scientists used MESSENGER spacecraft images and topographic data to build a comprehensive map of tectonic features on Mercury's surface. The findings indicate the planet has contracted between 4.6 and 7 kilometers in radius over its lifetime.
The paper presents findings on strain rates measured in travertine in the Rio Grande rift, age dating of the Neoarchean Rum Jungle complex, and the first lithosphere-scale illustration of the structural evolution of the Black Sea Basin. Geodynamic modeling also reveals internal structures produced during craton formation.
New Geosphere papers examine volcanic zones, the Sierra Nevada, and Utah's Confusion Range. The study on the Confusion Range may provide new opportunities for petroleum exploration in the region.
Studies examine the role of hydrated fault zones in carrying large amounts of water from Earth's oceans to the mantle. Researchers also investigate vertical structural heterogeneities within cratonic lithosphere, shedding light on continent destruction and evolution.
Lekic's work has improved the understanding of Earth's large-scale inner structure, revealing key features such as a low-velocity layer internal to continental plates. His research also explores neutrino geoscience and seismic attenuation, providing new insights into plate tectonics and continental evolution
A new study reveals that the Atlas Mountains are floating on a layer of superhot rock, challenging the traditional model of mountain structure. The researchers used seismometers to measure the thickness of the lithosphere beneath the mountains and found it to be only about 35 km deep.
Recent model calculations suggest that Earth's primary crust formed during the Archean eon was so dense it subside into the mantle. This process, known as delamination, triggered a return flow of mantle material to form new crust.
A team from MIT and Stanford University identified a 'runaway process' in which the sliding of rocks at great depths causes surrounding temperatures to spike. This influx of heat encourages more sliding, generating an earthquake.
This issue of Lithosphere features studies on the Great Slave Lake shear zone in northwest Canada, which provides insight into the deep structure of ancient mountain belts. The research also explores the tectonic development of the Tibetan Plateau, revealing that faults responsible for its formation are restricted within the crust.
A 250 million-year-old study suggests that Pangea integration led to environmental deterioration, causing the biggest mass extinction. The integration resulted in global-scale volcanic eruptions, greenhouse gas emissions, and changes in ocean chemistry, ultimately devastating land and marine ecosystems.
Researchers use X-ray facility to replicate high-pressure conditions, finding fractures nucleate at the onset of olivine-to-spinel transition. This discovery confirms earlier experimental work and provides strongest evidence yet that phase transformations trigger deep earthquakes.
Recent studies published in Lithosphere explore the tectonic history of ancient mountain chains, including the Central Iberian Massif, Arctic Alaska, and the Wet Mountains of Colorado. These findings shed light on the deformation mechanisms and crustal-scale magmatism across these regions.
Scientists have made significant findings on continental subduction, revealing the processes that occur within subduction channels and their impact on collision orogeny. These studies focus on the interaction between the deeply subducted crust and the overlying mantle wedge under ultrahigh pressure conditions.
The Greenland ice sheet is losing about 227 gigatonnes of ice per year, contributing to sea level rise. Researchers have coupled an ice/climate model with a thermo-mechanical model to accurately depict the ice sheet's dynamics and temperature changes.
Researchers studied China's Qinling and Tibetan Plateau orogens, finding evidence of late-stage foreland growth. In India, scientists proposed a cost-effective method for locating diamonds using geological, geochemical, and geochronological data. Additionally, a Middle Paleozoic continental arc was identified in southern China, providi...
Studies in Western Europe reveal local forces driving tectonic activity, while a paper on the Osa Peninsula describes rapid vertical deformation of crustal blocks. Another study examines the extension of an orogenic wedge through the exhumation of high-pressure terranes in Norway.
Researchers developed large ring laser gyroscopes six orders of magnitude more sensitive than commercial instruments. These devices can measure the Earth's rotation rate with unprecedented accuracy, capturing momentum exchange between atmosphere, hydrosphere, and lithosphere.
Researchers studied detrital zircon Hf isotopic compositions to connect the Alexander terrane in Canada with northern Caledonian granitoids. In California, a kinematic analysis of mélange fabrics near San Simeon reveals sinistral slip on the Nacimiento fault zone. The Western Alps also experienced short-lived fast erosional exhumation ...
The North China Craton's thin lithosphere and signs of thermo-tectonic reactivation challenge the traditional view of a stable cratonic lithosphere. The concept of 'craton destruction' has been widely accepted, influencing understanding of intraplate magmatism and continental evolution.
The study analyzes the Taiwan mountain belt to understand the initial formation of topographic curvature in a geologically young region. It also presents new U-Pb zircon ages for rocks in the Jurassic Bonanza arc, Vancouver Island, Canada, shedding light on the timing and character of ancient volcanic and plutonic activity.
Recent studies in Lithosphere magazine reveal that vertical-axis rotations can significantly impact shortening estimates with potential errors of up to 14%. Additionally, researchers investigate non-Pratt component of oceanic isostasy, finding a dynamic response within the Earth's mantle necessary for equilibrium. Meanwhile, pulsed def...
An UCLA scientist has discovered that the geological phenomenon of plate tectonics exists on Mars, revealing a primitive stage of plate tectonics. The discovery provides insight into how the early Earth may have looked and helps understand the origins of plate tectonics on Earth.
A study on Valles Marineris fault zone on Mars suggests left-slip transtensional deformation. In Iraq, a 'missing' Cretaceous arc assemblage has been identified in the Zagros orogenic belt. The Okanagan Valley shear zone in Canada has new age constraints and Phanerozoic protoliths for footwall gneisses.
This Geosphere special issue delves into the formation and transport of ancient oceanic rocks in southeastern Yukon, Canada. New techniques are also employed to study flat-topped seafloor mounds beneath the Ross Sea, which may be of volcanic origin.
Researchers analyze seismic data from India to understand past and present Earth dynamics. They also discuss the importance of studying forearc crust and ophiolites to understand subduction zone formation. Additionally, experiments reveal the melting of sediments at high pressures and temperatures.
This new research presents a well-documented ancient sedimentary record of subduction initiation in California, shedding light on the beginning of this process. The study also provides insights into the Karakoram Fault Zone in Tibet and updates the understanding of the Walker Lane belt in Nevada.
This bimonthly publication presents research on the Deccan Traps, transfluvial incision in Eastern Papua New Guinea, and late Pleistocene structural evolution of the Camarillo fold belt. Seismic data reveal imprints of volcanism deep beneath the Deccan volcanic province, while river profiles indicate vertical rock uplift and fault motion.
A NASA-sponsored researcher found that a melt-rich layer under the Pacific Ocean basin is not the only mechanism allowing continents to gradually shift their position. This discovery sheds new light on plate tectonics, providing insight into the movement of Earth's crustal plates over millions of years.
Scientists have discovered a new understanding of the Earth's mantle beneath the Pacific Ocean, revealing that the Gutenberg discontinuity is closely related to the lithosphere-asthenosphere boundary. The study suggests that partially molten rock plays a key role in forming the Gutenberg discontinuity.
New studies reveal mantle-driven uplift in the Rocky Mountains and Colorado Plateau, while also documenting extensional fault systems in the Aegean Sea. Additionally, researchers examine the impact of fault-enhanced irregularities on groundwater flow paths, with implications for nuclear waste repositories.
Researchers found fossilized fungal hyphae in subseafloor Eocene basalts, suggesting a non-prokaryotic biosphere. This discovery has implications for our understanding of the deep subseafloor environment.
Research highlights the age of continental crust, with over 60% originating in the Archean, 2.5 billion years ago. A new paleomagnetic pole for chron 32 corrects for spreading-rate dependence, improving skewness data accuracy. Seismic ambient noise analysis reveals structural alignments in the Chile Ridge Subduction Region.
The November GSA Today science article explores why the Southern Gulf of California ruptured so rapidly, attributing it to an oblique divergence across a thin and hot, weak lithosphere. This process allowed for rapid deformation and stretching of the crust, resulting in new sea floor formation in just 6-10 million years.
Researchers at Brown University created the highest-resolution picture of the bottom of the lithosphere in southern California, measuring the boundary between the lithosphere and asthenosphere. The study found dramatic changes in lithosphere thickness, revealing new insights into how rifting shaped the region.
A new model suggests that Siberian mantle plume contained recycled oceanic crust, leading to exceptional magmatic eruptions and mass extinction. The team's study provides new insights into the origin of the Siberian Traps and their relation to the Permo-Triassic mass extinction event.
Two studies examine the Jemez-Embudo Accommodation Zone in New Mexico and the Tennessee Salient in Appalachia, shedding light on tectonic processes. Geodynamic models and paleomagnetic data reveal no statistically significant rotation in the Rio Grande Rift and indicate a more complex history of curvature formation.
Researchers analyzed U-Pb-Hf characterization of the central Coast Mountains batholith, finding spatial and temporal trends in petrogenesis. They also discovered no correlation between Anderson Reservoir stage level and underlying Calaveras fault seismicity, despite calculated differential stress increases.
A team of scientists led by Rice University geologist Alan Levander has figured out why the Colorado Plateau is rising even as parts of its lower crust appear to be falling. The region's uplift is caused by magmatic material from the depths slowly rising to invade the lithosphere, causing layers to peel away and sink.
Two studies published in Lithosphere suggest the existence of a pre-3.3 billion year old continent in the East Indian Shield, implying a possible original supercontinent. Additionally, measurements of SKS splitting in South America indicate that asthenospheric flow plays a significant role in shaping the upper mantle's anisotropy.
A new framework for understanding biogeochemical cycles highlights the importance of balancing human needs with the health of the planet. This integrated view could help predict and manage climate change, improve sustainable forestry practices, and balance agricultural needs with estuary health.
Researchers found no repeated earthquakes on the same fault segment in China over 2000 years, suggesting a new fault system should be considered for future large earthquakes. Mid-continent earthquakes are linked to interacting faults across a large region.
The article discusses recent movements and past deformation in Central America, California, Turkey, and Canada. Key findings include the present rates and directions of movement between El Salvador and Nicaragua, as well as the role of low-angle normal faulting in active tectonics in the northern Owens Valley.