File:Partial melting asthenosphere EN.svg
Summary
Schematic diagram showing the physical processes within the Earth’s upper mantle that lead to the generation of magma. A to D are different <a href="https://en.wikipedia.org/wiki/plate_tectonics" class="extiw" title="w:plate tectonics">plate tectonic</a> settings. The graphs show the <a href="https://en.wikipedia.org/wiki/Geothermal_gradient" class="extiw" title="w:Geothermal gradient">geotherm</a> (temperature curve inside the Earth, red) and the <a href="https://en.wikipedia.org/wiki/Solidus_(chemistry)" class="extiw" title="w:Solidus (chemistry)">solidus</a> (temperature where rock starts to melt, green). When the two curves cross each other, magma is generated by <a href="https://en.wikipedia.org/wiki/Partial_melting" class="extiw" title="w:Partial melting">partial melting</a>.
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
Licensing
Lua error in package.lua at line 80: module 'strict' not found.
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 11:53, 13 January 2017 | | 1,000 × 600 (92 KB) | 127.0.0.1 (talk) | Schematic diagram showing the physical processes within the Earth’s upper mantle that lead to the generation of magma. A to D are different <a href="https://en.wikipedia.org/wiki/plate_tectonics" class="extiw" title="w:plate tectonics">plate tectonic</a> settings. The graphs show the <a href="https://en.wikipedia.org/wiki/Geothermal_gradient" class="extiw" title="w:Geothermal gradient">geotherm</a> (temperature curve inside the Earth, red) and the <a href="https://en.wikipedia.org/wiki/Solidus_(chemistry)" class="extiw" title="w:Solidus (chemistry)">solidus</a> (temperature where rock starts to melt, green). When the two curves cross each other, magma is generated by <a href="https://en.wikipedia.org/wiki/Partial_melting" class="extiw" title="w:Partial melting">partial melting</a>.<br> A) the curves do not cross - no magma is generated<br> B) at mid-ocean ridges magma generation occurs at quite shallow depths due to high temperatures and very thin lithosphere<br> C) over mantle plumes magma generation occurs at larger depths due to even higher temperatures but thicker lithosphere<br> 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 |
- You cannot overwrite this file.
File usage
The following 2 pages link to this file:
