A mantle plume is a proposed mechanism of convection within the Earth's mantle, hypothesized to explain anomalous volcanism. Because the plume head partially...
49 KB (6,056 words) - 07:46, 7 July 2024
Iceland hotspot (redirect from Iceland plume)
of Iceland is attributed to this plume, according to the theory of W. Jason Morgan. It is believed that a mantle plume underlies Iceland, of which the...
34 KB (4,302 words) - 07:09, 7 September 2024
mantle plumes has required progressive hypothesis-elaboration leading to variant propositions such as mini-plumes and pulsing plumes. Mantle plumes were...
97 KB (11,934 words) - 03:47, 29 July 2024
show slab and plume-like anomalies crossing the mantle transition zone. Although it is accepted that subducting slabs cross the mantle transition zone...
19 KB (2,319 words) - 16:21, 12 September 2024
there is a convective material circulation in the mantle. Hot material rises (in a mantle plume) while cooler (and heavier) material sinks downward...
28 KB (3,157 words) - 17:37, 3 August 2024
conditions in the lithosphere and upper mantle convection. Others suggest an origin in the deep mantle (mantle plume). Part of the controversy is the relatively...
38 KB (3,875 words) - 20:24, 16 August 2024
streams of hot mantle rising from the Earth's core–mantle boundary in a structure called a mantle plume. Whether or not such mantle plumes exist has been...
33 KB (3,948 words) - 23:47, 3 September 2024
Large low-shear-velocity provinces (redirect from Mantle blob)
Earth's crust that suggest multiple mantle plumes underneath. These zones represent around 8% of the volume of the mantle, or 6% of the entire Earth. Other...
18 KB (2,036 words) - 05:05, 29 July 2024
Tectonics of Mars (section Mantle plume origin)
magnetic anomalies have been detected in the northern plains. Single plume mantle convection has also been invoked to explain the hemispheric dichotomy...
23 KB (2,835 words) - 09:08, 15 September 2024
Ocean island basalt (section Mantle sources)
Earth's mantle, called mantle plumes. Some such hotspot volcanic chains are believed to have started with the formation of large igneous provinces. Mantle plume...
26 KB (2,892 words) - 17:06, 17 May 2024
the lower mantle has been shown to induce a spin transition of iron-bearing bridgmanite and ferropericlase, which may affect both mantle plume dynamics...
14 KB (1,726 words) - 09:19, 29 July 2024
Benue Trough (section Mantle plume theory)
refinement of the model involves the rise of a mantle plume, where abnormal heat results in melting of the upper mantle, thinning and stretching the crust, followed...
10 KB (1,186 words) - 03:48, 3 May 2024
of mantle plumes beneath the EAR. Others proposed an African superplume causing mantle deformation. Although the effects of deep-rooted mantle plumes are...
28 KB (3,211 words) - 02:54, 26 August 2024
continued to expand. The Iceland plume is a mantle plume under Iceland that carries hot material from the deep within Earth's mantle upwards to the crust. The...
8 KB (851 words) - 12:07, 16 September 2024
associated with a deep mantle plume. High 3He/4He ratios of the main pulse of the eruption are often seen in magmas with mantle plume origin. The area of...
31 KB (3,478 words) - 17:10, 17 September 2024
proposed in 1963 by John Tuzo Wilson, proposes that a single, fixed mantle plume builds volcanoes that then, cut off from their source by the movement...
68 KB (7,840 words) - 13:46, 24 May 2024
Volcanism in The Balleny Islands: Melting of Plume-Delivered Deep Mantle or Shallow Asthenospheric Mantle?" (PDF). Seventh Annual V. M. Goldschmidt Conference...
95 KB (9,604 words) - 12:01, 17 September 2024
the North American Plate over a fixed mantle plume. During the first major episodes of volcanic activity, the plume created the igneous intrusions of the...
10 KB (1,096 words) - 16:38, 10 July 2024
Central America that are attributed to a hot mantle plume. No modern komatiite lavas are known, as the Earth's mantle has cooled too much to produce highly magnesian...
63 KB (7,678 words) - 15:34, 26 July 2024
discussed mantle plume/hotspot assumption into question. Some geologists believe there is not enough definitive evidence to suggest a mantle plume exists...
30 KB (3,459 words) - 12:34, 13 September 2024
underlain by a mantle plume. Support for a plume origin includes petrological, geochemical, and isotopic evidence indicating a deep-mantle source, seismic...
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and Malpelo Ridge. The type of lava erupted was a mix of plume material and depleted upper mantle, similar to the type of lava found in the central Galapagos...
15 KB (1,987 words) - 22:11, 30 July 2024
Anahim hotspot (redirect from Anahim plume)
the Anahim hotspot might be supplied by a mantle plume from the upper mantle rather than a deep-seated plume proposed by Wilson. Tomographic imaging has...
36 KB (4,470 words) - 20:33, 24 August 2024
column, a plume of volcanic gas and ash in the atmosphere Mantle plume, an upwelling of molten rock within the Earth's mantle Moisture plume or atmospheric...
11 KB (1,461 words) - 22:39, 12 June 2024
through another fluid Eruption plume, a column of volcanic ash and gas emitted into the atmosphere during an eruption Mantle plume, an upwelling of hot rock...
2 KB (338 words) - 18:21, 7 July 2024
the Karoo Triple Junction, namely: Inherited dyke-induced fractures Mantle plume hypothesis Passive melting of Gondwana supercontinent A number of dykes...
14 KB (1,805 words) - 09:28, 2 June 2022
coast of Africa. Hypotheses for this volcanic activity include a deep mantle plume beginning about 70 million years ago. The underwater El Hierro and subaerial...
5 KB (546 words) - 15:08, 15 September 2024
across mantle plumes, each volcano becomes inactive as it drifts off the plume, and new volcanoes are created where the plate advances over the plume. The...
89 KB (9,963 words) - 06:45, 5 September 2024
warmer regions, such as mantle plumes. This is the most complex discontinuity and marks the boundary between the upper and lower mantle. It appears in PP precursors...
24 KB (2,938 words) - 21:15, 3 August 2024
underlain by a mantle plume and that this plume is responsible for the volcanic activity and associated geothermal anomalies. Evidence for a plume origin includes...
10 KB (1,144 words) - 01:30, 29 July 2024