Magma Storage Region Processes Inferred from Geochemistry of Fe-Ti Oxides in Andesitic Magma, Soufriere Hills Volcano, Montserrat, W.I. |
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| Authors: | DEVINE J D; RUTHERFORD M J; NORTON G E; YOUNG S R |
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| Institution: | 1 DEPARTMENT OF GEOLOGICAL SCIENCES, BROWN UNIVERSITY, PROVIDENCE, RI 02912, USA
2 MONTSERRAT VOLCANO OBSERVATORY, MONGO HILL, MONTSERRAT, W.I. |
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| Abstract: | Analyses of Fe–Ti oxides help constrain models of magmastorage region processes for the Soufrière Hills Volcano,Montserrat (W.I.), and provide clear evidence of the natureof transient heating events in the magma storage region. Toconstrain timescales of magma heating and remobilization, theTiO2 zoning patterns in a time series of natural titanomagnetiteswere compared with those produced in controlled phase equilibriumexperiments on the andesite. Most samples of andesite eruptedfrom 1995 to 2002 contain titanomagnetite crystals with uniformcore compositions (TiO2 |
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