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