News tagged with mantle plume

Fledgling mantle plume may be cause of African volcano's unique lava

Space & Earth / Earth Sciences

Mar 13, 2009 | 5 / 5 (10) | 0

(PhysOrg.com) -- Nyiragongo, an active African volcano, possesses lava unlike any other in the world, which may point toward its source being a new mantle plume says a University of Rochester geochemist. The ...

A definitive guide to the great mantle plume debate

Space & Earth / Earth Sciences

Nov 13, 2007 | 3.6 / 5 (7) | 0

Geoscientists' heightened debate on the existence of mantle plumes is highlighted in a new volume published by the Geological Society of America. Plates, Plumes, and Planetary Processes includes both chapters advocating the ...

Simulations, ancient magnetism suggest mantle plumes may bend deep beneath Earth's crust

Space & Earth / Earth Sciences

Apr 02, 2009 | 4.3 / 5 (11) | 0

Computer simulations, paleomagnetism and plate motion histories described in today's issue of Science reveal how hotspots, centers of erupting magma that sit atop columns of hot mantle that were once though ...

What lies beneath: new research looks deep into the centre of the Earth

Space & Earth /

Jan 20, 2006 | 4.6 / 5 (10) | 0

New research published this week on the evolution of volcanoes sheds light on what lies deep beneath the Earth's surface. The research, published in Nature, suggests that the plume of hot material that provid ...

The continents as a heat blanket

Space & Earth / Earth Sciences

Jan 22, 2009 | 3 / 5 (4) | 3

Drifting of the large tectonic plates and the superimposed continents is not only powered by the heat-driven convection processes in the Earth's mantle, but rather retroacts on this internal driving processes. In doing so, ...

Kilauea volcano shoots plume of ash

Space & Earth / Earth Sciences

Mar 26, 2008 | 3.9 / 5 (7) | 0

Scientists in Hawaii say they are keeping a close watch on a plume of ash from Kilauea Volcano's Halemaumau Crater.

Study proposes explanation for migration of volcanic activity on Mars

Space & Earth / Space Exploration

Dec 15, 2008 | 3.8 / 5 (8) | 0

Picture a ball. It's an ordinary ball in every way except that it is roughly 4,300 miles in diameter and is moving through the cold of space some 35 million miles from Earth, and hurtling around the sun in ...

What goes down, must come up: Geoscientists offer new model for degassing of Earth's mantle

Space & Earth / Earth Sciences

May 27, 2009 | 3.8 / 5 (5) | 4

A new analysis of the processes that constantly stir the Earth's deep mantle is helping to explain how the mantle holds onto a portion of ancient noble gases that were trapped during the Earth's formation.

Yellowstone's ancient supervolcano: Only lukewarm?

Space & Earth / Earth Sciences

Aug 27, 2008 | 4.4 / 5 (40) | 3

The geysers of Yellowstone National Park owe their eistence to the "Yellowstone hotspot"--a region of molten rock buried deep beneath Yellowstone, geologists have found. But how hot is this "hotspot," and ...

Towards a better understanding of hot spot volcanism

Space & Earth / Earth Sciences

Jan 31, 2008 | 4.3 / 5 (6) | 0

Most of the Earth’s listed active volcanoes are located at the borders between two tectonic plates, where upsurge of magma from the mantle is facilitated. When these magmatic uprisings occur at a subduction zone, where one ...

Hotspots or not? Isotopes score one for traditional theory

Space & Earth / Earth Sciences

Dec 06, 2006 | 4.2 / 5 (13) | 0

New chemical evidence sheds light on the physical constraints of 'hotspots' -- locations where upwellings of Earth's mantle material form seamounts and island chains. Although the existence of hotspots has ...

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