Popular Mantle News and Current Events

Popular Mantle News and Current Events, Mantle News Articles.
Sort By: Most Relevant | Most Recent
Page 1 of 25 | 974 Results
Older than the moon
Geochemist Matt Jackson finds that only the hottest, most buoyant mantle plumes draw from a primordial reservoir deep in the Earth. (2017-02-06)

'Problem of missing ice' finally solved by movement of the earth's crust
An international team of scientists published a study in Nature Communications today. This new reconstruction revolutionizes what is thought about the global continental ice mass during the Last Ice Age. (2021-02-23)

'Quartz' crystals at the Earth's core power its magnetic field
Scientists at the Earth-Life Science Institute at the Tokyo Institute of Technology report in Nature (Fen. 22, 2017) unexpected discoveries about the Earth's core. The findings include insights into the source of energy driving the Earth's magnetic field, factors governing the cooling of the core and its chemical composition, and conditions that existed during the formation of the Earth. (2017-02-22)

Earth's core and mantle separated in a disorderly fashion
Plumes of hot rock surging upward from the Earth's mantle at volcanic hotspots contain evidence that the Earth's formative years may have been even more chaotic than previously thought, according to new work from a team of Carnegie and Smithsonian scientists published in Nature. (2018-01-24)

'Missing ice problem' finally solved
During glacial periods, the sea level falls, because vast quantities of water are stored in the massive inland glaciers. To date, however, computer models have been unable to reconcile sea-level height with the thickness of the glaciers. (2021-02-23)

Ironing out the mystery of Earth's magnetic field
The Earth's magnetic field has been existing for at least 3.4 billion years thanks to the low heat conduction capability of iron in the planet's core. This is the result of the first direct measurement of the thermal conductivity of iron at pressures and temperatures corresponding to planetary core conditions. DESY scientist Zuzana Konôpková and her colleagues present their study in the journal Nature. The results could resolve a debate about the so-called geodynamo paradox. (2016-06-01)

How seafloor weathering drives the slow carbon cycle
A previously unknown connection between geological atmospheric carbon dioxide cycles and the fluctuating capacity of the ocean crust to store carbon dioxide has been uncovered by two geoscientists from the University of Sydney. Better understanding of the slow carbon cycle will help us predict to what extent the continents, oceans and ocean crust will take up the extra human-induced rise in atmospheric carbon dioxide in the long run. (2018-02-14)

Argonne's powerful X-rays key to confirming water source deep below Earth's surface
A study published in Science last week relies on extremely bright X-ray beams from the US Department of Energy's Advanced Photon Source at Argonne National Laboratory to confirm the presence of naturally occurring water at least 410 kilometers below the Earth's surface. This exciting discovery could change our understanding of how water circulates deep in the Earth's mantle and how heat escapes from the lower regions of our planet. (2018-03-26)

McGill researchers find oldest rocks on Earth
McGill University researchers have discovered the oldest rocks on Earth -- a discovery which sheds more light on our planet's mysterious beginnings. These rocks, known as (2008-09-25)

Another clue for fast motion of the Hawaiian hotspot
Recent studies have suggested that the Hawaiian hotspot moved relatively quickly southward in the period from 60 to about 50 million years ago. This hypothesis is supported by a new study of Kevin Konrad and colleagues. They have evaluated new rock dating of the Rurutu volcanic chain and added data from the Hawaiian-Emperor chain and the Louisville chain. It shows that the Hawaiian-Emperor hotspot displays strong motion between 60 and 48 million years ago. (2018-02-27)

Why are there different 'flavors' of iron around the Solar System?
New work from Carnegie's Stephen Elardo and Anat Shahar shows that interactions between iron and nickel under the extreme pressures and temperatures similar to a planetary interior can help scientists understand the period in our Solar System's youth when planets were forming and their cores were created. (2017-02-20)

Scientists use seismic waves to locate missing rock under Tibet
Geologists at the University of Illinois at Urbana-Champaign have located a huge chunk of Earth's lithosphere that went missing 15 million years ago. By finding the massive block of errant rock beneath Tibet, the researchers are helping solve a long-standing mystery, and clarifying how continents behave when they collide. (2007-02-07)

Geoscientists suggest 'snowball Earth' resulted from plate tectonics
About 700 million years ago, the Earth experienced unusual episodes of global cooling that geologists refer to as 'Snowball Earth.' In a new study published in the April issue of the journal Terra Nova, two geologists at The University of Texas at Dallas and UT Austin suggest that those major climate changes can be linked to one thing: the advent of plate tectonics. (2018-05-07)

Unusual thermal convection in a well-mixed fluid: Can a syrup separate when mixed?
Researchers from Tokyo Metropolitan University, have recently discovered unusual thermal convection in a uniform mixture of high and low viscosity liquids. Kobayashi and Kurita found that concentration fluctuations are enhanced by thermal convection when the two liquids have a large viscosity difference. Such mixtures are ubiquitously observed in nature, daily life, and manufacturing processes, e.g. mantle convection, syrup, polymer products. These results promise further insight into non-equilibrium phenomena in fluid mixtures with contrasting 'thickness.' (2017-12-15)

Ancient asteroid impact exposes the moon's interior
A large basin on the moon has revealed that its interior is made of a different mineral than Earth's interior, contradicting the theory that the interior of the planets look mostly the same. (2017-10-10)

UTA study sheds new light on evolution
Research from the University of Texas at Arlington and the Wadia Institute of Himalayan Geology suggests that hydrogen, oxygen, water and carbon dioxide are being generated in the earth's mantle hundreds of kilometers below the earth's surface. (2017-10-03)

A series of fortunate events
Volcanism is sometimes like food poisoning, where the Earth spews forth unstable material. New research from Michigan Technological University, University of Wisconsin Oshkosh and ETH Zurich shows that a significant pulse of volatile carbon was released from the Earth's mantle around 500 million years ago. But why? (2017-11-27)

A new Goldilocks for habitable planets
The search for habitable, alien worlds needs to make room for a second 'Goldilocks,' according to a Yale University researcher. A new study, appearing in the journal Science Advances on Aug. 19, suggests that simply being in the habitable zone isn't sufficient to support life. A planet also must start with an internal temperature that is just right. (2016-08-19)

Study opens new questions on how the atmosphere and oceans formed
A new study led by The Australian National University has found seawater cycles throughout the Earth's interior down to 2,900km, much deeper than previously thought, reopening questions about how the atmosphere and oceans formed. (2017-02-27)

Cold production of new seafloor
Magma steadily emerges between oceanic plates. It pushes the plates apart, builds large underwater mountains and forms new seafloor. This is one of the fundamental processes that constantly change the face of the Earth. But there are also times when new seabed is created without any volcanism, by un-roofing mantle material directly at the seafloor. Scientists led by GEOMAR, Germany have published the first estimation based on seismic data on how much seafloor is produced this way. (2018-05-24)

New details emerge on temperature, mobility of earth's lower crust in Rocky Mountains
A research team led by Colorado State University has mapped the temperature and viscosity of earth's lower crust for the first time. (2018-01-17)

Diamond discovery under pressure
For the first time, scientists have found Earth's fourth most abundant mineral -- calcium silicate perovskite -- at Earth's surface. (2018-03-07)

Challenging core belief: Have we misunderstood how Earth's solid center formed?
Researchers at Case Western Reserve University in Cleveland, Ohio, are posing an important question about the formation of planet Earth's inner core, arguing that it's time to consider the nucleation paradox at the heart of the issue. (2018-02-07)

Hot climate could shut down plate tectonics
A new study of possible links between climate and geophysics finds that a much hotter climate could shut down the Earth's plate tectonics. While human-induced climate change couldn't generate the needed heat, volcanic activity or changes in the sun's luminosity could. The research, which is available online in Earth and Planetary Science Letters, may help explain why Venus swelters beneath a thick blanket of heat-trapping carbon dioxide. (2008-05-12)

Tectonic plates act like variable thermostat
PNAS study finds that heat loss from Earth's mantle is highly variable and depends on tectonic plate arrangement. Earth currently at relatively low level of heat loss. (2007-08-13)

Scientists reveal the links between deep carbon cycle and geodynamics of big mantle wedge
The formation age of the big mantle wedge beneath eastern Asia and the lithospheric thinning mechanism of the North China craton are two key scientific issues. Based on new findings of deep carbon cycle, a recent study suggests that the big mantle wedge beneath eastern Asia was formed 125 Ma, and interaction between the CO2-rich silicate melt produced in the big mantle wedge and lithospheric mantle results in lithospheric thinning of the North China craton. (2018-07-19)

Dissection of the 2015 Bonin deep earthquake
Researchers at Tohoku University's Department of Geophysics, have been studying the deep earthquake which occurred on May 30, 2015, to the west of Japan's Bonin Islands. (2017-03-15)

Diamonds from the deep: Study suggests water may exist in Earth's lower mantle
A new study, which included experiments at Berkeley Lab, suggests that water may be more common than expected at extreme depths approaching 400 miles and possibly beyond -- within Earth's lower mantle. The study explored microscopic pockets of a trapped form of crystallized water molecules in a sampling of diamonds. (2018-03-15)

Southern California's tectonic plates revealed in detail
Geologists at Brown University have produced the most detailed picture of southern California's lithosphere, which is crucial to understanding the geological forces that shaped the area. The team found the lithosphere's thickness differs markedly throughout, yielding new insights into how rifting shaped the southern California terrain. Results are published in Science. (2011-10-06)

Unique diamond impurities indicate water deep in Earth's mantle
UNLV scientists discovered the first direct evidence that fluid water pockets may exist as far as 500 miles deep into the Earth's mantle.. (2018-03-09)

How did plate tectonics start on Earth?
Hot mantle plume rising to the lithosphere induced the first large-scale sinking of lithospheric plates. (2015-11-11)

Space weather, EarthScope, and protecting the national electrical grid
Geomagnetic disturbances from solar storms or electromagnetic pulse weapons pose a high risk to the electrical power grid. This project examines a real-world example of 3-D mapping of the crust and mantle in the northwestern US from EarthScope data to determine risks posed by ground conductivity that could amplify or change how geomagnetic disturbances affect power lines. This new 3-D method detected surprising effects that the current 1-D method of risk assessment fails to detect. (2017-12-12)

ANU scientists helping to improve understanding of plate tectonics
Scientists at The Australian National University (ANU) are helping to improve understanding of how rocks in Earth's hot, deep interior enable the motions of tectonic plates, which regulate the water cycle that is critical for a habitable planet. (2018-03-14)

Study suggests helium plays a 'nanny' role in forming chemical compounds under pressure
Helium, a noble gas, was long believed to be 'too aloof' to react with the other elements on the periodic table. Now, however, scientists have provided a theoretical explanation of how helium may be capable of forming stable compounds. (2018-03-19)

Subduction of the Pacific plate resulted in the destruction of the North China Craton
Why the North China Craton became active 1-2 million years ago after 2 billion years of quiescence? The newest research suggested that its small size and the intra-plate weak zones make it vulnerable to destruction (internal reason). The subductions of the surrounding plates, also contribute to its destabilization (external factor). (2018-03-28)

Catching mantle plumes by their magma tails
Simulations show how mantle plumes decelerate seismic waves and how plumes appear in seismic tomographic images of Earth's mantle. Mantle plume simulations could help guide future experiments and save cost of large-scale ocean-bottom seismometer deployments to image deep Earth. XSEDE Extended Collaborative Support Services, Campus Champions, Stampede1 supported mantle plume simulations. Novel use of numerical models detail how mantle plumes form and how they rise with estimates of their seismic structure. (2018-04-27)

Plate tectonics may have been active on Earth since the very beginning
A new study suggests that plate tectonics -- a scientific theory that divides the earth into large chunks of crust that move slowly over hot viscous mantle rock -- could have been active from the planet's very beginning. The new findings defy previous beliefs that tectonic plates were developed over the course of billions of years. (2018-09-26)

'True polar wander' may have caused ice age
Earth's latest ice age may have been caused by changes deep inside the planet. Based on evidence from the Pacific Ocean, including the position of the Hawaiian Islands. (2018-11-19)

Oregon scientists decipher the magma bodies under Yellowstone
Using supercomputer modeling, University of Oregon scientists have unveiled a new explanation for the geology underlying recent seismic imaging of magma bodies below Yellowstone National Park. (2018-04-16)

Fast rising bedrock below West Antarctica reveals an extremely fluid Earth mantle
An international team of researchers, with a new study published in Science with DTU Space as lead author, finds that the bedrock below the West Antarctic Ice Sheet is rising much more rapidly than expected, revealing a very different Earth structure than previously believed. This discovery has important implications in understanding the present and future climate changes in Antarctica. (2018-06-21)

Page 1 of 25 | 974 Results
   First   Previous   Next      Last   
Brightsurf.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com.