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Thermal impact of dykes on ignimbrite and implications for fluid flow compartmentalisation in calderas

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Thermal impact of dykes on ignimbrite and implications for fluid flow compartmentalisation in calderas. / Kennedy, Ben M.; Heap, Michael J.; Burchardt, Steffi et al.

In: Volcanica, Vol. 5, No. 1, 04.02.2022, p. 75-93.

Research output: Contribution to Journal/MagazineJournal articlepeer-review

Harvard

Kennedy, BM, Heap, MJ, Burchardt, S, Villeneuve, M, Tuffen, H, Gilg, HA, Davidson, J, Duncan, N, Saubin, E, Gestsson, EB, Anjomrouz, M & Butler, P 2022, 'Thermal impact of dykes on ignimbrite and implications for fluid flow compartmentalisation in calderas', Volcanica, vol. 5, no. 1, pp. 75-93. https://doi.org/10.30909/vol.05.01.5573

APA

Kennedy, B. M., Heap, M. J., Burchardt, S., Villeneuve, M., Tuffen, H., Gilg, H. A., Davidson, J., Duncan, N., Saubin, E., Gestsson, E. B., Anjomrouz, M., & Butler, P. (2022). Thermal impact of dykes on ignimbrite and implications for fluid flow compartmentalisation in calderas. Volcanica, 5(1), 75-93. https://doi.org/10.30909/vol.05.01.5573

Vancouver

Kennedy BM, Heap MJ, Burchardt S, Villeneuve M, Tuffen H, Gilg HA et al. Thermal impact of dykes on ignimbrite and implications for fluid flow compartmentalisation in calderas. Volcanica. 2022 Feb 4;5(1):75-93. doi: 10.30909/vol.05.01.5573

Author

Kennedy, Ben M. ; Heap, Michael J. ; Burchardt, Steffi et al. / Thermal impact of dykes on ignimbrite and implications for fluid flow compartmentalisation in calderas. In: Volcanica. 2022 ; Vol. 5, No. 1. pp. 75-93.

Bibtex

@article{09ed2a1bd4b448babdde60f51da7b75a,
title = "Thermal impact of dykes on ignimbrite and implications for fluid flow compartmentalisation in calderas",
abstract = "Ignimbrites within calderas host intrusions with hazardous and/or economically significant hydrothermal systems. The Hv{\'i}tserkur ignimbrite at Brei{\dh}uv{\'i}k caldera, north-eastern Iceland, is intruded by basaltic dykes. Our data show that the ignimbrite immediately adjacent to the dyke is hard, dark-coloured, recrystallised quartz, plagioclase, and alkali feldspar with a low permeability and porosity and frequent macrofractures. At 1-2 m from the dyke, the ignimbrite is hard, dominantly glassy with pervasive perlitic microfractures, has high permeability, but low porosity and frequent macrofractures. A narrow zone of pervasive unlithified clay exists 2 m from the dyke. Beyond this, the ignimbrite is soft and zeolite-rich, has low permeability, high porosity and fewer macrofractures. The dyke intrusion promoted a narrow zone of welding, fracturing and perlitisation in the ignimbrite resulting in high permeability and focussed alteration. Our study shows how intrusions and their thermal aureoles create vertical pathways for, and horizontal barriers to, geothermal fluid flow.",
keywords = "Earth and Planetary Sciences (miscellaneous), Geochemistry and Petrology, Geology, Geophysics",
author = "Kennedy, {Ben M.} and Heap, {Michael J.} and Steffi Burchardt and Marl{\`e}ne Villeneuve and Hugh Tuffen and Gilg, {H. Albert} and Jonathan Davidson and Neryda Duncan and Elodie Saubin and Gestsson, {Einar Bessi} and Marzieh Anjomrouz and Philip Butler",
year = "2022",
month = feb,
day = "4",
doi = "10.30909/vol.05.01.5573",
language = "English",
volume = "5",
pages = "75--93",
journal = "Volcanica",
issn = "2610-3540",
publisher = "Volcanica",
number = "1",

}

RIS

TY - JOUR

T1 - Thermal impact of dykes on ignimbrite and implications for fluid flow compartmentalisation in calderas

AU - Kennedy, Ben M.

AU - Heap, Michael J.

AU - Burchardt, Steffi

AU - Villeneuve, Marlène

AU - Tuffen, Hugh

AU - Gilg, H. Albert

AU - Davidson, Jonathan

AU - Duncan, Neryda

AU - Saubin, Elodie

AU - Gestsson, Einar Bessi

AU - Anjomrouz, Marzieh

AU - Butler, Philip

PY - 2022/2/4

Y1 - 2022/2/4

N2 - Ignimbrites within calderas host intrusions with hazardous and/or economically significant hydrothermal systems. The Hvítserkur ignimbrite at Breiðuvík caldera, north-eastern Iceland, is intruded by basaltic dykes. Our data show that the ignimbrite immediately adjacent to the dyke is hard, dark-coloured, recrystallised quartz, plagioclase, and alkali feldspar with a low permeability and porosity and frequent macrofractures. At 1-2 m from the dyke, the ignimbrite is hard, dominantly glassy with pervasive perlitic microfractures, has high permeability, but low porosity and frequent macrofractures. A narrow zone of pervasive unlithified clay exists 2 m from the dyke. Beyond this, the ignimbrite is soft and zeolite-rich, has low permeability, high porosity and fewer macrofractures. The dyke intrusion promoted a narrow zone of welding, fracturing and perlitisation in the ignimbrite resulting in high permeability and focussed alteration. Our study shows how intrusions and their thermal aureoles create vertical pathways for, and horizontal barriers to, geothermal fluid flow.

AB - Ignimbrites within calderas host intrusions with hazardous and/or economically significant hydrothermal systems. The Hvítserkur ignimbrite at Breiðuvík caldera, north-eastern Iceland, is intruded by basaltic dykes. Our data show that the ignimbrite immediately adjacent to the dyke is hard, dark-coloured, recrystallised quartz, plagioclase, and alkali feldspar with a low permeability and porosity and frequent macrofractures. At 1-2 m from the dyke, the ignimbrite is hard, dominantly glassy with pervasive perlitic microfractures, has high permeability, but low porosity and frequent macrofractures. A narrow zone of pervasive unlithified clay exists 2 m from the dyke. Beyond this, the ignimbrite is soft and zeolite-rich, has low permeability, high porosity and fewer macrofractures. The dyke intrusion promoted a narrow zone of welding, fracturing and perlitisation in the ignimbrite resulting in high permeability and focussed alteration. Our study shows how intrusions and their thermal aureoles create vertical pathways for, and horizontal barriers to, geothermal fluid flow.

KW - Earth and Planetary Sciences (miscellaneous)

KW - Geochemistry and Petrology

KW - Geology

KW - Geophysics

U2 - 10.30909/vol.05.01.5573

DO - 10.30909/vol.05.01.5573

M3 - Journal article

VL - 5

SP - 75

EP - 93

JO - Volcanica

JF - Volcanica

SN - 2610-3540

IS - 1

ER -