Non-hotspot volcano chains originating from small-scale sublithospheric convection

Details Non-hotspot volcano chains originating from small-scale sublithospheric convection Non-hotspot volcano chains originating from small-scale sublithospheric convection

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3423310b&link_type=abstract

Geophysical Research Letters, Volume 34, Issue 23, CiteID L23310

Statistics

Computation

17

Volcanology: Intra-Plate Processes (1033, 3615), Tectonophysics: Dynamics Of Lithosphere And Mantle: General (1213), Computational Geophysics: Modeling (4255), Tectonophysics: Tectonics And Magmatism, Geographic Location: Pacific Ocean

Scientific paper

Some oceanic volcano chains violate the predictions of the hotspot hypothesis for geographic age progressions. One mechanism invoked to explain these observations is small-scale sublithospheric convection (SSC). In this study, we explore this concept in thermo-chemical, 3D-numerical models. Melting due to SSC is shown to emerge in elongated features (~750 km) parallel to plate motion and not just at a fixed spot; therefore volcanism occurs in chains but not with hotspot-like linear age progressions. The seafloor age at which volcanism first occurs is sensitive to mantle temperature, as higher temperatures increase the onset age of SSC because of the stabilizing influence of thicker residue from previous mid-ocean ridge melting. Mantle viscosity controls the rate of melt production with decreasing viscosities leading to more vigorous convection and volcanism. Calculations predict many of the key observations of the Pukapuka ridges, and the volcano groups associated with the Line, Cook-Austral, and Marshall Islands.

Affiliated with

Also associated with

No associations

Rating

Non-hotspot volcano chains originating from small-scale sublithospheric convection does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Non-hotspot volcano chains originating from small-scale sublithospheric convection, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Non-hotspot volcano chains originating from small-scale sublithospheric convection will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1758043