Hotspot (geology) | plume hypothesis中文
VolcanicregionsthoughttobefedbyunderlyingmantlethatisanomalouslyhotcomparedwiththesurroundingmantleDiagramshowingacrosssectionthroughtheEarthslithosphere(inyellow)withmagmarisingfromthemantle(inred).Lowerdiagramillustratesahotspottrackcausedbytheirrelativemovement.Ingeology,theplacesknownashotspotsorhotspotsarevolcanicregionsthoughttobefedbyunderlyingmantlethatisanomalouslyhotcomparedwiththesurroundingmantle.[citationneeded]ExamplesincludetheHawaii,IcelandandYellowstonehotspots.Ahotspotsposi...
Volcanic regions thought to be fed by underlying mantle that is anomalously hot compared with the surrounding mantle
Diagram showing a cross section through the Earths lithosphere (in yellow) with magma rising from the mantle (in red). Lower diagram illustrates a hotspot track caused by their relative movement.In geology, the places known as hotspots or hot spots are volcanic regions thought to be fed by underlying mantle that is anomalously hot compared with the surrounding mantle.[citation needed] Examples include the Hawaii, Iceland and Yellowstone hotspots. A hotspots position on the Earths surface is independent of tectonic plate boundaries, and so hotspots may create a chain of volcanoes as the plates move above them.
There are two hypotheses that attempt to explain their origins. One suggests that hotspots are due to mantle plumes that rise as thermal diapirs from the core–mantle boundary.[1] The other hypothesis is that lithospheric extension permits the pas...