Thermal state of northwest Kyushu mantle suggested by the petrochemistry of the Tara-dake basalts

Details Thermal state of northwest Kyushu mantle suggested by the petrochemistry of the Tara-dake basalts Thermal state of northwest Kyushu mantle suggested by the petrochemistry of the Tara-dake basalts

Feb 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3103604h&link_type=abstract

Geophysical Research Letters, Volume 31, Issue 3, CiteID L03604

Physics

Mineralogy And Petrology: Igneous Petrology, Mineralogy And Petrology: Major Element Composition, Mineralogy And Petrology: Minor And Trace Element Composition, Tectonophysics: Continental Margins And Sedimentary Basins, Information Related To Geographic Region: Asia

Scientific paper

Temperatures of northwest Kyushu mantle are estimated using petrochemical data of the relatively primitive Tara-dake basalts erupted at around 1 Ma. Model primitive melt compositions estimated by the addition of equilibrated olivines to bulk compositions indicate that melting temperatures range from 1230 to 1300°C at around 1 GPa. Moderately high melting temperatures of the Tara-dake basalts indicate that mantle upwelling in NW Kyushu is caused not by thermal plumes but by the convection at the boundary between the continent and the ocean.

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