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Primary Arc Basalts from Daisen Volcano, Japan: Equilibrium Crystal Fractionation versus Disequilibrium Fractionation during Supercooling |
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| Authors: | TAMURA Y; YUHARA M; ISHII T |
| Institution: | 1DEPARTMENT OF EARTH SCIENCES, KANAZAWA UNIVERSITY, KANAZAWA 920-1192, JAPAN 2RESEARCH INSTITUTE FOR HAZARDS, NIIGATA UNIVERSITY, NIIGATA 950-2181, JAPAN 3OCEAN RESEARCH INSTITUTE, UNIVERSITY OF TOKYO, TOKYO 164-8639, JAPAN |
| Abstract: | Daisen volcano, southwest Japan, has been thought to be an exclusivelydacitic volcano, lavas having trace element patterns with agarnet signature. We studied the basalts at the western footof the volcano and made two unexpected findings. (1) The homogeneityof 87Sr/86Sr in Daisen basalts (Sr isotopic variability |
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