CURRENT PLATE VELOCITIES RELATIVE TO HOTSPOTS: IMPLICATIONS FOR HOTSPOT MOTION, MANTLE VISCOSITY AND GLOBAL REFERENCE FRAME

dc.contributor.author	Wang S.
dc.contributor.author	Wang R.
dc.date.accessioned	2021-03-11T06:59:48Z
dc.date.available	2021-03-11T06:59:48Z
dc.date.issued	2001
dc.identifier	https://www.elibrary.ru/item.asp?id=764324
dc.identifier.citation	Earth and Planetary Science Letters, 2001, 189, 3-4, 133-140
dc.identifier.issn	0012-821X
dc.identifier.uri	https://repository.geologyscience.ru/handle/123456789/26554
dc.description.abstract	The HS2-NUVEL1 model being used for current plate velocities relative to hotspots is shown to be generally inconsistent with the observed hotspot data sampled from non-Pacific regions. Instead, we determine the T22A model, which provides a good and consistent fit to the trends of globally distributed hotspot traces, but predicts plate velocities at hotspots systematically lower than the observed rates of hotspot volcanic migrations. As a result, it implies that the return flow in the lower mantle has a velocity about 1/4 of the plate velocity, and that the lower mantle is about 20 times more viscous than the upper mantle. Although hotspots are not relatively fixed, they do define a global reference frame for plate motion and mantle convection.
dc.subject	HOT SPOTS
dc.subject	PLATE TECTONICS
dc.subject	MANTLE
dc.subject	CONVECTION
dc.subject	VISCOSITY
dc.subject	MODELS
dc.title	CURRENT PLATE VELOCITIES RELATIVE TO HOTSPOTS: IMPLICATIONS FOR HOTSPOT MOTION, MANTLE VISCOSITY AND GLOBAL REFERENCE FRAME
dc.type	Статья

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