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Geodynamics of the Yellowstone Hotspot: Plume or Not?

We present new magnetic and seismic evidence relevant to the hypothesis of a hot spot beneath Yellowstone National Park. A pseudogravity transformation enhances the regional magnetic anomalies, and the resultant map can also be interpreted to show regional variation in geothermal gradient. We propose that a pseudogravity lineament along the eastern margin of the park marks a heat-flow province boundary, whereas closure within Yellowstone marks a crustal hot spot roughly coincident with a double caldera mapped geologically. Magnetic highs at the caldera boundary may represent ring intrusions. Seismically, Yellowstone is at the most active part of the Inter-mountain Seismic Belt, where it changes strike from north to northwest and is intersected by a west-trending secondary seismic belt. Within the caldera, the earthquakes decrease in frequency of occurrence and abruptly decrease in focal depth. At the caldera boundary, four composite fault-plane solutions indicate radial compression, possibly due to resurgent magmatism. These geophysical data support the concept of a roughly circular region of anomalously hot crust at a junction of major tectonic trends but does not directly bear on the hypothesis of a mantle plume.

N2 - We hypothesize that active tectonic processes in the south polar terrain of Enceladus, the 500-kilometer-diameter moon of Saturn, are creating fractures that cause degassing of a clathrate reservoir to produce the plume documented by the instruments on the Cassini spacecraft. Advection of gas and ice transports energy, supplied at depth as latent heat of clathrate decomposition, to shallower levels, where it reappears as latent heat of condensation of ice. The plume itself, which has a discharge rate comparable to Old Faithful Geyser in Yellowstone National Park, probably represents small leaks from this massive advective system.

Geodynamics of the Yellowstone Hotspot: Plume ..

The Deccan beyond the plume hypothesis - Deccan Traps

"Of course, our model can't predict specific future super-eruptions. However, looking back through 20 million years of history, we do not see anything that makes the present-day Yellowstone region particularly special - at least not enough to make us suspect that it may do something different from the past when many catastrophic eruptions have occurred," Liu said. "More importantly, this work will give us a better understanding of some of the mysterious processes deep within the earth, which will help us better understand the consequences of plate tectonics, including the mechanism of earthquakes and volcanoes."

AB - We present new magnetic and seismic evidence relevant to the hypothesis of a hot spot beneath Yellowstone National Park. A pseudogravity transformation enhances the regional magnetic anomalies, and the resultant map can also be interpreted to show regional variation in geothermal gradient. We propose that a pseudogravity lineament along the eastern margin of the park marks a heat-flow province boundary, whereas closure within Yellowstone marks a crustal hot spot roughly coincident with a double caldera mapped geologically. Magnetic highs at the caldera boundary may represent ring intrusions. Seismically, Yellowstone is at the most active part of the Inter-mountain Seismic Belt, where it changes strike from north to northwest and is intersected by a west-trending secondary seismic belt. Within the caldera, the earthquakes decrease in frequency of occurrence and abruptly decrease in focal depth. At the caldera boundary, four composite fault-plane solutions indicate radial compression, possibly due to resurgent magmatism. These geophysical data support the concept of a roughly circular region of anomalously hot crust at a junction of major tectonic trends but does not directly bear on the hypothesis of a mantle plume.

Mantle plume - Do plumes exist?

Earth material is very viscous but moves over geologic times. The Earth is convecting, a process which is often likened to a pot of water on a stove. Plate tectonics is the surface expression of a convecting Earth. Two forces drive mantle convection: differences in density of mantle material and heat. Through the first one, which is thought to be the dominant driving force, old oceanic plates are pulled into the mantle. In mid-ocean ridges and plumes, hot material is buoyant and ascends. There are two schools of thought where mantle plumes originate. While the material from mid-ocean ridges is thought to come from the upper mantle (the prominent 660km discontinuity separates the upper from the lower mantle), it is currently greatly debated whether slabs can penetrate into the lower mantle and whether plumes also originate in the lower mantle. Seismic tomography gives evidence for both. Evidence for layered convection comes from geochemistry. Plume basalts (a type of volcanic rock), or OIB (ocean island basalts), seem to be different from mid-ocean ridge basalts (MORB). It is thought that MORBs are recycled, depleted upper mantle while plumes tap fresh, primitive mantle from a different "reservoir". Different reservoirs inside the Earth could exist, if the Earth was not convecting as a whole but in two independent layers (upper/lower mantle two-layered convection). In such a system, plumes could originate somewhere near the 600km discontinuity. One the other hand, some geodynamical mantle convection models predict that sunken slab material could melt near the core mantle boundary, which could feed a mantle plume.

N2 - We present new magnetic and seismic evidence relevant to the hypothesis of a hot spot beneath Yellowstone National Park. A pseudogravity transformation enhances the regional magnetic anomalies, and the resultant map can also be interpreted to show regional variation in geothermal gradient. We propose that a pseudogravity lineament along the eastern margin of the park marks a heat-flow province boundary, whereas closure within Yellowstone marks a crustal hot spot roughly coincident with a double caldera mapped geologically. Magnetic highs at the caldera boundary may represent ring intrusions. Seismically, Yellowstone is at the most active part of the Inter-mountain Seismic Belt, where it changes strike from north to northwest and is intersected by a west-trending secondary seismic belt. Within the caldera, the earthquakes decrease in frequency of occurrence and abruptly decrease in focal depth. At the caldera boundary, four composite fault-plane solutions indicate radial compression, possibly due to resurgent magmatism. These geophysical data support the concept of a roughly circular region of anomalously hot crust at a junction of major tectonic trends but does not directly bear on the hypothesis of a mantle plume.

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Beehive geyser is a cone-type geyser


Volcanoes In the News - Crystalinks

"A robust result from these models is that the heat source behind the extensive inland volcanism actually originated from the shallow oceanic mantle to the west of the Pacific Northwest coast," Liu said. "This directly challenges the traditional view that most of the heat came from the plume below Yellowstone."

Hapgood’s Theory of Earth Crust Displacement

AB - We hypothesize that active tectonic processes in the south polar terrain of Enceladus, the 500-kilometer-diameter moon of Saturn, are creating fractures that cause degassing of a clathrate reservoir to produce the plume documented by the instruments on the Cassini spacecraft. Advection of gas and ice transports energy, supplied at depth as latent heat of clathrate decomposition, to shallower levels, where it reappears as latent heat of condensation of ice. The plume itself, which has a discharge rate comparable to Old Faithful Geyser in Yellowstone National Park, probably represents small leaks from this massive advective system.

The Science and Discoveries of USArray

A model whereby the Yellowstone system reflects feedback between upper-mantle convection and regional lithospheric tectonics is able to explain the observations better than a deep-mantle plume hypothesis.

The Cell-Phone Poisoning of America

We hypothesize that active tectonic processes in the south polar terrain of Enceladus, the 500-kilometer-diameter moon of Saturn, are creating fractures that cause degassing of a clathrate reservoir to produce the plume documented by the instruments on the Cassini spacecraft. Advection of gas and ice transports energy, supplied at depth as latent heat of clathrate decomposition, to shallower levels, where it reappears as latent heat of condensation of ice. The plume itself, which has a discharge rate comparable to Old Faithful Geyser in Yellowstone National Park, probably represents small leaks from this massive advective system.

many books - Rachel Carson, Book List

Crazy that we are all fighting for the "long run" and we have so little time left to salvage anything worth saving before "it" kills us. "Like, How long does it take to power down a nuclear plant". I think we needed to start the process "yesterday". Personally, I find the charts and graphs on this article alone, to be enough to wake the dead. Metaphorically speaking of coarse(grin). I live where both scenarios of the occurrence in yellow stone happen here. There is a day coming when the Great White Buffalo will make it's final stand. I read a book once, "conversations with god", in it it said that the native american indians were the most advanced of all human life that has existed on our planet. Frankly, I'm good with that hypothesis. What really is the meaning of life, "and", why are we here? I think the indigenous people had all that figured out. "What do 'you' want to be when you grow up little Joey?"… "Well first I need to find out who I already am. And then we'll go from there". Can you imagine such a response from todays kids? Though it is hard to accomplish, I try to install their (Indigenous) concepts in my day to day existence. Mostly how I treat others, my planet and my home(cabin). And for those in the city, I find it easy for the indigenous ways to be tangible in many ways. But you have to look people in the eye and be 100% honest!!, Kindly. "That's" where things start to break down. And then there's all the crap from corporate stores that gets sold each and every day,

Snowstorms And Raging Wildfires In ..

"The heat needed to drive volcanism usually occurs in areas where tectonic plates meet and one slab of crust slides, or subducts, under another. However, Yellowstone and other volcanic areas of the inland western U.S. are far away from the active plate boundaries along the west coast," said geology professor who led the new research. "In these inland cases, a deep-seated heat source known as a mantle plume is suspected of driving crustal melting and surface volcanism."

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