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Doctoral thesis
English

Geochemical And Temporal Evolution Of The Saint Kitts Magmatic System, Lesser Antilles

Number of pages302
Imprimatur date2022-09-23
Defense date2022-08-03
Abstract

A volcanic edifice, and the dynamics of its eruptions, reflects the physical and chemical properties of the underlying magmatic system. It is recognised that these properties may evolve in space and time, as well as between adjacent volcanoes. However, the extent of such variability on decadal to millennial timescales, between successive eruptions, and how this controls eruptive style and magnitude remains largely enigmatic. This thesis uses stratified volcanic deposits from Saint Kitts in the Lesser Antilles to track the temporal evolution of geochemistry and magma storage conditions, and its coupling with eruptive dynamics. We employ image segmentation of quantified chemical maps and random forest machine learning thermobarometry to demonstrate recursive eruptive and geochemical behaviour in time, which is used to hypothesise as to the course of future eruptions. Our observations regarding the link between geochemistry, magma storage conditions, and eruptive dynamics are extrapolated along the Lesser Antilles arc.

eng
Citation (ISO format)
HIGGINS, Oliver John. Geochemical And Temporal Evolution Of The Saint Kitts Magmatic System, Lesser Antilles. 2022. doi: 10.13097/archive-ouverte/unige:164867
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Creation11/08/2022 1:18:00 PM
First validation11/08/2022 1:18:00 PM
Update time03/16/2023 8:45:43 AM
Status update03/16/2023 8:45:39 AM
Last indexation05/06/2024 11:57:16 AM
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