Gregor Hahn, MPhil student

Ignimbrite tephrostratigraphy to determine the dimensions and magmatic history of an explosive caldera volcano, Borrowdale Volcanic Group, UK

Gregor HahnSupervisor: Professor Mike Branney and Dr Philip Leat

Research Group: Volcanoes, Tectonics and Mineral Resources

Project Overview

At most volcanoes around the world, the critical features for an understanding of their structural and volcanological development during catastrophic explosive eruptions are concealed under younger deposits or caldera lakes. Due to exhumation and deep glacial dissection, Scafell caldera is a rare and very-well exposed internationally famous exception. The fundamental aim of this project is to analyse the emplacement and relation of the pyroclastic outflow sheets.

Research Questions

  • Are the former mapped ignimbrites the same pyroclastic units as in Scafell caldera – can they be clearly identified in the field or by geochemical fingerprinting
  • How far did the outflow sheets of Scafell caldera flow?
  • Can the geochemical data give evidence of the configuration of the magma reservoir plumbing system?

Ignimbrite outflow sheets in the Lake District, SW of Scafell Caldera. These are to be determined, mapped and sampled during field work.
Ignimbrite outflow sheets in the Lake District, SW of Scafell Caldera. These are to be determined, mapped and sampled during field work.

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