Articles tagged with Magma
Researchers found that mantle melting-point depression due to fusible components could generate young lunar volcanism. The Chang'E-5 samples, returned in 2020, revealed surprisingly young volcanic activity only 2 billion years old, contradicting the long-held assumption that the Moon has been geologically dead since then.
Researchers found that basaltic magma chambers can grow extremely rapidly, with rates of hundreds to thousands of meters per year, producing large, well-differentiated intrusions. This challenges current understanding of slow growth rates for such formations and suggests a new perspective on the formation of layered mafic intrusions.
A new study suggests that Earth's deep mantle was drier than initially thought, with a water concentration 4-250 times lower than the upper mantle. This finding challenges the assumption that the mantle was uniform from its formation and may have prevented mixing within the mantle.
Researchers at Mainz University found the Cumbre Vieja lava to be exceptionally low in viscosity, resulting in rapid flow and devastating damage. The study published in Nature Communications revealed that the lava's composition, particularly its silica content, contributed to its fluidity.
Researchers from the University of Oregon studied a persistent lava lake at Kīlauea's summit, finding that seismic signals encode resonance of magma sloshing in and out of the shallow magma chamber. The study provides new insights into volcanic gas migration and magma temperature, shedding light on the volcano's dynamics.
Researchers have discovered deep underground magma containing 8-20 weight percent water, far wetter than previously thought. This find sheds light on the role of water in explosive volcanic eruptions and the formation of economic ore deposits.
Scientists from the University of Geneva discover that copper deposits are formed by mechanisms similar to those causing large volcanic eruptions. The 'porphyry' deposits, containing copper, form when hot fluids release from cooling magmas and develop under the earth's surface.
A new method developed by LMU geophysicist Max Moorkamp improves the accuracy of understanding the Earth's crust composition. By combining data on electrical conductivity and density, researchers can better distinguish between fluids and solid graphite in geological regions.
Researchers identify magma intrusion as cause of 85,000-quake swarm in Antarctica, largest ever recorded. The swarm peaked with two large earthquakes before subsiding, marking the end of a sustained magmatic unrest.
A new study provides strong evidence that periodic volcanic activity in the Karoo province triggered multiple Jurassic extinctions. The research reveals that volcanism occurred over a longer period than previously thought, with three distinct stages of activity, and had a significant impact on the environment.
A massive volcanic eruption at the end of the Triassic period caused a global cooling effect, leading to the mass extinction. The event paved the way for the rise of dinosaurs as their natural predators went extinct.
A new study led by Smithsonian volcanologist Dan Rasmussen finds that water content in magma is a significant factor controlling its storage depth. The research provides crucial insights into the physics of magma storage beneath volcanoes, which can aid in predicting volcanic eruptions.
Researchers have discovered a surprisingly soft mineral, davemaoite, that plays a crucial role in the Earth's recycling of rocks. The study suggests that davemaoite is around 1,000 times softer than other minerals in the mantle, and its mechanical properties can help explain how earthquakes and volcanoes occur.
Research reveals that magmas from Mount Etna and Mount Vulture have extremely high Nb/Ta ratios, indicating a deep carbon-rich lithospheric mantle beneath southern Italy. This process contributes significantly to global volcanic CO2 emissions.
The 2018 Anak Krakatau volcano collapse in Indonesia was triggered by long-term destabilization, not a sudden explosive eruption. The study found that the disaster was less likely to have been caused by magma forcing its way to the surface and triggering the landslide.
Scientists have proposed a new model for the Moon's crust formation, suggesting that a 'slushy' magma ocean played a key role. The research suggests that crystals remained suspended in liquid magma over hundreds of millions of years, eventually forming the lunar crust.
A team led by Dr. Stamps will investigate the physics of continental rifting in Uganda's East African Rift System, where magma-poor rifts form without surface volcanoes. The research aims to answer how strain is accommodated during upper crustal extension and what role fluid-filled faults or pre-existing structures play.
Scientists have discovered a 900-mile mantle pipeline stretching from the Gal ªgapos Hotspot to Central America, suggesting that hotspots are not fixed in place. This new finding transforms our understanding of geologic processes occurring beneath the Earth's surface.
A research team analyzed seismic noise recorded over the last decade to better understand volcanic processes at Campi Flegrei. They found that directionality loss in noise data indicates the migration of deep fluids towards the eastern caldera, which triggers earthquakes.
A new model by a SwRI-led team applies geologic evidence to understand how oxygen levels in the Earth's atmosphere evolved. The results indicate that large impacts may have contributed to the scarcity of oxygen, delaying its oxidation.
Researchers found a 40-meter fall in sea level increases eruption likelihood at Santorini and possibly other volcanoes worldwide. Climate change impacts volcanic activity, particularly as ice sheets retreat and global sea levels rise.
A team of geologists reviewed the literature on volcanic eruptions, determining that most magma rising from depth doesn't cause an eruption. Older volcanoes produce less frequent but larger eruptions. The analysis helps refine models to reduce the impact of volcanic eruptions on nearby populations.
New research reveals ancient Chinese arc magmatism preserved in the Chicxulub impact structure, shedding light on the Maya Block basement. Additionally, detrital zircon U-Pb ages from Antarctica's Victoria Land provide new constraints on the glaciation of southern Gondwana during the Late Paleozoic Ice Age.
Scientists study the Central Anatolian Plateau and Southern Rocky Mountain Volcanic Field, while examining fluvial siliciclastic rocks from the San Juan Basin. In another study, researchers investigate the evolution of the Portland and Tualatin forearc basins in Oregon, highlighting their relation to the Cascadia convergent margin. Add...
A team of researchers identified an unusual belt of igneous rocks stretching over 2,000 miles from Canada to Mexico, defying expectations of volcanic activity. The rock formation, dated to 80-50 million years ago, originated deep underground and lacks evidence of volcanoes.
Researchers have discovered surprisingly shallow magma pools too small to be detected by common volcano monitoring equipment, posing new risks for eruptions. These hidden magma bodies challenge conventional views of magma detection and may lead to more explosive eruptions than expected.
Researchers at University of Chicago and Stanford University propose mechanism for formation and retention of water-dominated atmospheres on hot, rocky exoplanets. The model suggests these planets could have a water-rich atmosphere for long stretches, with some potentially keeping it for billions of years.
A study published in Science Advances has found rare evidence of the Earth's early magma ocean preserved in ancient rocks from southwestern Greenland. The discovery provides a window into the planet's solidification and internal chemistry, suggesting that other rocks may also preserve signs of ancient magma oceans.
A new study by geoscientists finds that the reactivation of Steamboat Geyser does not foretell any upcoming volcanic eruptions in Yellowstone National Park. The researchers discovered a relationship between the column height of the geyser and the depth of its reservoir, with deeper reservoirs resulting in higher eruption jets.
The study found that Earth's early atmosphere was slightly oxidizing, with carbon dioxide as its main constituent, and had a surface pressure much higher than today due to the hot surface.
A recent study reconstructed the geologic events leading to the 2018 Kīlauea eruption, revealing a sequence of cascading events that drove major destruction. The research team found that focusing on broader, longer history can help overcome tunnel vision and improve eruption forecasting.
Researchers have used powerful seismic imaging techniques to study the Alaska coastline's volcanic activity, revealing unexpected details about tectonic plates and volcano distribution. The new research highlights complexities in subduction zones and how they control volcano formation.
A new method using zircon crystals reveals that up to 350 km3 of magma are stored below Nevado de Toluca volcano, potentially leading to devastating eruptions. This technique provides a resolution two times higher than existing methods and is applicable to most types of volcanoes.
Scientists have discovered that a tiny amount of molten rock, less than 0.7% by volume, is present in the asthenosphere under all oceanic plates, reducing the viscosity and 'decoupling' them from the underlying mantle. This research improves our understanding of plate tectonics and how it drives plate movement.
Researchers found that nanolites, 10,000 times smaller than a human hair, increase magma viscosity, leading to explosive eruptions. The study uses cutting-edge imaging and Raman spectroscopy to demonstrate the surprising effect of nanolites on volcanic behavior.
Researchers found that carbonate-rich molten rock can alter the physical properties of rocks, affecting seismic waves. The study provides new insights into the elasticity, density, and compressibility of these rocks, potentially revealing a substantial carbon reservoir in the Earth's deep upper mantle.
Researchers used 3D magnetotelluric imaging to image magma reservoirs beneath Weishan volcano, revealing vertically distributed low-resistivity anomalies and melt fractions of over 15%. The findings suggest the volcano is in an active stage with potential for future eruptions.
A recent study published in Nature reveals that the deep Earth's water cycle plays a crucial role in triggering earthquakes and tsunamis. The research, led by Dr. George Cooper, found that the amount of water released from the subducting plate is directly linked to the volcanic productivity and earthquake activity.
Researchers summarize the processes involved in forming porphyry copper deposits, including dehydration, magma ascent, assimilation, storage, and homogenization. The study highlights ongoing challenges, such as tectonic control on geochemical characteristics and metal pre-enrichment mechanisms.
Researchers challenge long-held idea that magma chambers are composed mostly of crystals. A new study reveals large basaltic magma chambers may be entirely liquid-dominated.
The study, published in The Astrophysical Journal, found that there are more stars like the Sun than expected in these groups, increasing the chances of finding Earth-like planets. These 'magma ocean planets' are easier to detect near stars like the Sun and emit heat that can be observed with next-generation infrared telescopes.
A recent study published in Nature shows that CO2 emissions from the African continent's rift system are destabilizing diamond deposits, which could have significant implications for the environment.
Researchers have found that excess minerals in these rocks originate from feeder conduits, where magma interacts with cold sidewalls and crystallises. This approach has great promise for solving petrological problems of magmatic complexes.
Geologists from Wits University have found a mechanism that generates melts saturated in plagioclase alone, leading to the formation of monomineralic layers. These unique rock formations are common in layered intrusions worldwide and hold significant value for glass fibre manufacturing.
Researchers at the University of Exeter have found that Tungurahua volcano in Ecuador is showing early warning signals of a potential collapse. The volcano's western flank is displaying rapid deformation, which could lead to a colossal landslide and widespread damage to the surrounding area.
A team of scientists has successfully measured the viscosity of silicate melt under pressure and temperature conditions similar to those in the lower earth mantle. The data suggests that a bridgmanite-enriched rock layer was formed during the early history of the Earth, with implications for our understanding of the planet's formation.
Researchers have observed processes in the upper mantle before a new submarine volcano formed off the Comoros island. The team reconstructed the partial emptying of a large magma reservoir and identified a dramatic movement of molten rocks before the eruption.
Researchers have discovered that stable isotopes of zirconium can be fractionated by magnitudes much larger than previously thought. This finding changes the view on how this element behaves in the solid Earth, enabling a new tool to gain insights into magma chemistry as it crystallizes.
University of Queensland scientists have identified a new reference material and used a state-of-the-art instrument to better date rock formations in central Asia. This new method could help establish the relationship between historical episodes of magma activity and mineral accumulation.
Researchers investigated carbon partitioning between iron liquid and silicate melt under high-pressure conditions using a boron nitride capsule. The new experimental result shows that the partition coefficient of carbon is several times lower than previous studies, suggesting that carbon in a magma ocean may not have been as depleted.
A team of researchers has developed a new volcano eruption forecasting technique using the Kalman filtering method, which captures the unique unrest patterns of the Okmok volcano in Alaska. The study reveals that past eruptions are key to understanding the likelihood of future volcanic activity.
A 900-mile stretch of volcanoes in the Pacific Ring of Fire became dormant for 10 million years due to a prominent bend in the Hawaiian Islands chain and a crack in the Pacific Ocean Plate. The crack, formed by opposing plates moving in opposite directions, disrupted the water-laden conveyor belt that drives volcanic activity.
Research findings suggest a narrow depth range of six to 10 kilometers for magma chambers to erupt repeatedly, due to water vapor bubbling and crust expansion. This 'sweet spot' is found between pressures of 1.5 and 2.5 kilobars, allowing the chamber to grow without erupting.
Researchers from the University of Cambridge used 'crystal clocks' to estimate magma storage times near the Earth's crust-mantle boundary. They found that magma can be stored for over 1,000 years, helping improve models of volcanic eruptions and release of gases.
Seismic and electrical conductivity observations suggest water is present in the Earth's mantle, affecting dynamics and causing earthquakes. Hydrogen and water play key roles in lower internal friction, magma generation, and mantle convection.
The Earth's F/Cl ratio is super-chondritic, indicating enrichment of fluorine in the silicate Earth. Chlorine may have become concentrated on planetary surfaces through escape of the hydrosphere during Earth formation.
Researchers have discovered that platinum crystals grow directly on the floor of magma chambers, contradicting a long-held theory. This finding has significant implications for understanding the formation of other precious metal deposits.
A study found that the earthquakes were caused by subsurface movement of magma and fluid movement in Yellowstone. The swarm was divided into two clusters, one with Hebgen Lake aftershocks and another with a different origin. Researchers concluded that the events highlight the ongoing nature of earthquakes.
Researchers at Yale University and Japan offer an explanation for the moon's composition, suggesting that magma played a key role in its formation. The new model suggests that 80% of the moon is made up of proto-Earth materials, contradicting previous theories that suggested the impactor was responsible.
Volcano seismologist Jacqueline Caplan-Auerbach studies Loihi's 1996 eruption for parallels to Kilauea's 2018 activity, suggesting a caldera collapse mechanism. Loihi's recent increase in seismicity may indicate magma replenishment, predicting Kilauea could be quiet for a decade before reactivating.