Talk:Low-velocity zone
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Implications for plate tectonics edit
It would be great if a section could be added drawing the connection between the LVZ and the notions of plate tectonics and crustal evolution. Brews ohare (talk) 22:04, 21 February 2010 (UTC)
- The figure showing velocity vs. depth may be misleading. The velocity profile for "Tectonic North America (TNA)" presumably refers to the west coast, where active subduction has thinned the "mantle wedge" of lithosphere underlying the continental crust. The TNA profile can be construed as showing a LVZ, albeit at a higher altitude / lower depth. The curves for "west coast" vs. "east coast" of North America may actually both indicate LVZs, the former at a depth of 100km, the latter at a depth of 250km. That depth difference corresponds closely to the thickness of (mantle) lithosphere, down to the depth of the LIthosphere-Aesthenosphere Boundary (LAB).
- The article might also be improved, by making reference to earth's past geologic history, e.g. LVZs underlying Pangea a quarter billion years ago. Presumably, the LVZ now underlying the Atlantic ocean would, then, have underlain the Pangean continent, causing the rifting open, of the proto-Atlantic, c.200Ma. Perhaps that implies, that rifting of continental crust is associated with LVZ aesthenosphere ponding there-under? 66.235.38.214 (talk) 19:18, 3 November 2012 (UTC)
higher electrical conductivity edit
Inexpertly, higher electrical conductivity, within the partially melted LVZ, implies that electrons are less mobile, "locked" into covalent bonds within the solid phase, and become more mobile, when those bonds are broken, and the electrons become "available", normally for bonding, but potentially for conduction. If so, then this article could be improved, by appropriate links to Wikipedia entries on Chemistry and Conduction.66.235.38.214 (talk) 22:16, 3 November 2012 (UTC)
Geography class 8th edit
True or false.1)Asthenosphere is also known as the low velocity zone. 2409:4088:CE12:166D:0:0:C44A:A802 (talk) 09:31, 17 March 2024 (UTC)