Partial_melting_asthenosphere_EN.svg
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Summary
Description Partial melting asthenosphere EN.svg |
English:
Schematic diagram showing the physical processes within the Earth’s upper mantle that lead to the generation of magma. A to D are different
plate tectonic
settings. The graphs show the
geotherm
(temperature curve inside the Earth, red) and the
solidus
(temperature where rock starts to melt, green). When the two curves cross each other, magma is generated by
partial melting
.
A) the curves do not cross - no magma is generated B) at mid-ocean ridges magma generation occurs at quite shallow depths due to high temperatures and very thin lithosphere C) over mantle plumes magma generation occurs at larger depths due to even higher temperatures but thicker lithosphere D) over subducting slabs magma generation occurs at larger depths due to lowering of melting temperature of the rock by fluids released from the slab |
Date | |
Source | Own work |
Author | Woudloper |
Other versions |
File:Partial melting asthenosphere DE.svg
(German)
File:Partial melting asthenosphere ES.svg (Spanish) File:Partial melting asthenosphere FR.svg (French) File:Partial melting asthenosphere NL.svg (Dutch) File:Partial melting asthenosphere PL.svg (Polish) |
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