Tag

Mantle Plume

All articles tagged with #mantle plume

science19 hours ago•7 min saved

Ancient plate stresses, not a plume, power Yellowstone

A new Science paper argues Yellowstone’s volcanism isn’t driven by a fixed mantle plume but by stresses from the vanished Farallon plate under North America. The geophysical model describes a translithospheric magma plumbing system with two branches feeding the Yellowstone caldera and the Snake River Plain; the crust’s geometry and mantle flow create conduits for molten material, explaining two different styles of volcanism at a single hotspot. While the approach links Yellowstone to historical plate movements, it remains a present‑day snapshot and leaves questions about history and why Yellowstone is unique still open.

via Ars Technica|

#farallon-plate #hotspot #mantle-plume

space14 days ago•3 min saved

Hidden Mantle Plume Could Be Nudging Mars to Spin Faster

NASA’s InSight data, compared with Viking measurements, indicate Mars’s day is shortening slightly over time; Delft University researchers propose a buried, buoyant mantle plume—an equatorial negative mass anomaly—that could push lighter material upward while denser material moves downward, speeding Mars’ rotation and potentially triggering volcanism, a finding that points to a more active interior and strengthens the case for a dedicated gravity mission to study Mars’ interior.

via Futurism|

#insight #mantle-plume #mars

science16 days ago•4 min saved

Deep Interior Plume Nudges Mars to Spin Up

A study using NASA’s InSight data and Viking observations finds Mars’ day length is shortening very slightly, resulting in a rotation speed-up of about 70 microseconds per year. Researchers propose a deep underground negative mass anomaly beneath the Tharsis region is rising, creating melt pockets and moving heavier material toward the rotation axis, which would speed up the planet’s spin and suggests a more active interior with more internal heat than previously thought.

via The Daily Galaxy|

#insight #mantle-plume #mars

space17 days ago•97 min saved

Hidden mantle plume may be nudging Mars to spin faster

A study using NASA’s InSight data and computer models suggests a buoyant mantle plume beneath Mars’ Tharsis region could redistribute mass and cause the planet to rotate slightly faster over time, potentially explaining Mars’s changing spin and implying smaller rocky worlds may stay geologically active longer than previously thought.

via Live Science|

#insight #mantle-plume #mars

science1 month ago•4 min saved

Shifting plates and a mantle plume carved the Atlantic’s 500-km canyon

Geoscientists mapped the King’s Trough, a 500-kilometer canyon-like feature about 1,000 km off Portugal, and concluded it formed around 37–24 million years ago due to a transient plate boundary that fractured the seafloor. A hot mantle plume likely weakened the crust, aiding tectonic forces; the boundary later migrated south toward the Azores, with the finding supported by high-resolution mapping and volcanic rock analysis and suggesting parallels with the Terceira Rift.

via The Daily Galaxy|

#atlantic-ocean-canyon #kings-trough-complex #mantle-plume

science1 month ago•5 min saved

Mantle Plume and Transient Boundary Carved the Atlantic's King's Trough

New mapping and rock analyses show the 500‑km King’s Trough off Portugal formed 37–24 million years ago where a temporary plate boundary intersected a mantle plume, causing intense fracturing and basin formation but stopping short of a full seafloor‑spreading ridge; the plume likely connects to the Azores system, offering a living example of how such underwater canyons develop under tectonic and thermal forces.

via ScienceAlert|

#atlantic-ocean #kings-trough #mantle-plume

science2 months ago•5 min saved

500-KM Oceanic Canyon Traced to a Tectonic Zipper, Not Erosion

Scientists mapped the King’s Trough, a 500+ km underwater canyon in the North Atlantic, and determined it formed over millions of years by the slow separation of the European and African plates via a tectonic 'zipper,' aided by unusually thick, hot crust from the Azores mantle plume. The finding, reported after METEOR expedition data and high‑resolution sonar, links deep mantle processes to surface tectonics and reshapes how we think about underwater canyon formation.

via The Daily Galaxy|

#geology #kings-trough #mantle-plume

science9 months ago•3 min saved

Emerging Ocean in Africa: Lava and Mantle Activity Shape a New Rift

Scientists have discovered a pulsing mantle plume beneath Ethiopia's Afar region, which is gradually splitting the continent and may lead to the formation of a new ocean, driven by rhythmic surges of hot mantle material that influence tectonic rifting.

via Space|

#afar-region #africa #mantle-plume

science9 months ago•1 min saved

Deep Earth Pulses May Split Africa and Form a New Ocean

Deep beneath East Africa's Afar region, a pulsing mantle plume is causing tectonic plates to diverge, potentially leading to the formation of a new ocean in 20-30 million years as the continent splits along rifts, offering insight into the Earth's geological processes.

via Newser|

#afar-region #africa #mantle-plume

science9 months ago•5 min saved

Rhythmic Mantle Activity Sparks Africa's Continental Split and New Ocean Formation

Scientists have discovered rhythmic pulses of molten mantle rock beneath Ethiopia's Afar Rift, which influence the stretching and cracking of Earth's crust, potentially leading to the formation of a new ocean basin, and revealing a dynamic connection between deep Earth processes and surface geological activity.

via SciTechDaily|

#afar-rift #continental-breakup #mantle-plume

science9 months ago•3 min saved

Pulsing Mantle Plume May Divide East Africa

A pulsing mantle plume beneath Ethiopia is gradually pulling the region apart and creating a new ocean, with chemical signatures indicating rhythmic surges of molten rock that vary depending on the thickness of the overlying tectonic plates, providing insights into volcanic activity and continental breakup.

via Live Science|

#ethiopia #mantle-plume #ocean-formation

science9 months ago•5 min saved

Deep Earth Pulses and Magma Threats Beneath Africa

Scientists have discovered rhythmic pulses of molten mantle rising beneath Africa's Afar region, revealing a dynamic, pulsing mantle plume that influences tectonic rifting and ocean formation, with implications for volcanism and earthquakes.

via Phys.org|

#afar-rift #earths-interior #mantle-plume

science9 months ago•5 min saved

Scientists Discover 'Ghost Plume' in Oman, Hinting at Possible Earth's Core Leak

Scientists have discovered a mysterious 'ghost plume' of hot rock beneath eastern Oman, which suggests that Earth's core may be leaking heat faster than previously thought. This invisible mantle plume, detected through seismic wave analysis, does not produce surface volcanic activity due to a thick rock lid, but its existence could imply many more such plumes worldwide, impacting our understanding of Earth's internal heat distribution and tectonic processes.

via Daily Mail|

#earths-core #ghost-plume #mantle-plume

science9 months ago•2 min saved

Hidden Mantle Plume Detected Beneath Oman Could Explain India's Movement

Scientists have identified a 'ghost' mantle plume beneath Oman, a hot rock column with no surface volcanic activity, which could reshape understanding of Earth's internal heat flow and geological processes. The discovery, based on seismic data and computer modeling, suggests the existence of similar hidden plumes worldwide, potentially impacting models of Earth's thermal evolution.

via Yahoo|

#earths-core #ghost-plume #mantle-plume

earth-science2 years ago•4 min saved

Kama'ehu: Hawai'i's Undersea Volcano Erupted Five Times in 150 Years

Researchers at the University of Hawai'i at Mānoa have discovered that the undersea volcano Kama'ehu has erupted at least five times in the past 150 years. This is the first time the ages of these eruptions have been estimated, shedding light on the growth and evolution of the volcano. The study also revealed that Kama'ehu's lava chemistry changes over a timescale of about 1200 years, in contrast to the more rapid changes observed in lava from the neighboring volcano Kīlauea. The findings provide insights into the behavior of Hawaiian volcanoes and the role of the mantle plume beneath the Hawaiian hotspot.

via Phys.org|

#earth-science #eruption-frequency #hawaiian-volcanoes