Microstructural constraints on magmatic mushes under Kīlauea Volcano, Hawai'i.
Distorted olivines of enigmatic origin are ubiquitous in erupted products from a wide range of volcanic systems (e.g., Hawai'i, Iceland, Andes). Investigation of these features at Kīlauea Volcano, Hawai'i, using an integrative crystallographic and chemical approach places quantitative cons...
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ftunivcam:oai:www.repository.cam.ac.uk:1810/301886 2023-07-30T04:04:24+02:00 Microstructural constraints on magmatic mushes under Kīlauea Volcano, Hawai'i. Wieser, Penny E Edmonds, Marie Maclennan, John Wheeler, John 2020-02-09T01:56:32Z application/pdf https://doi.org/10.17863/CAM.48954 https://www.repository.cam.ac.uk/handle/1810/301886 eng eng Nature communications doi:10.17863/CAM.48954 https://www.repository.cam.ac.uk/handle/1810/301886 Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ essn: 2041-1723 nlmid: 101528555 Article 2020 ftunivcam https://doi.org/10.17863/CAM.48954 2023-07-10T21:12:43Z Distorted olivines of enigmatic origin are ubiquitous in erupted products from a wide range of volcanic systems (e.g., Hawai'i, Iceland, Andes). Investigation of these features at Kīlauea Volcano, Hawai'i, using an integrative crystallographic and chemical approach places quantitative constraints on mush pile thicknesses. Electron backscatter diffraction (EBSD) reveals that the microstructural features of distorted olivines, whose chemical composition is distinct from undistorted olivines, are remarkably similar to olivines within deformed mantle peridotites, but inconsistent with an origin from dendritic growth. This, alongside the spatial distribution of distorted grains and the absence of adcumulate textures, suggests that olivines were deformed within melt-rich mush piles accumulating within the summit reservoir. Quantitative analysis of subgrain geometry reveals that olivines experienced differential stresses of ∼3-12 MPa, consistent with their storage in mush piles with thicknesses of a few hundred metres. Overall, our microstructural analysis of erupted crystals provides novel insights into mush-rich magmatic systems. Article in Journal/Newspaper Iceland Apollo - University of Cambridge Repository |
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Open Polar |
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Apollo - University of Cambridge Repository |
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language |
English |
description |
Distorted olivines of enigmatic origin are ubiquitous in erupted products from a wide range of volcanic systems (e.g., Hawai'i, Iceland, Andes). Investigation of these features at Kīlauea Volcano, Hawai'i, using an integrative crystallographic and chemical approach places quantitative constraints on mush pile thicknesses. Electron backscatter diffraction (EBSD) reveals that the microstructural features of distorted olivines, whose chemical composition is distinct from undistorted olivines, are remarkably similar to olivines within deformed mantle peridotites, but inconsistent with an origin from dendritic growth. This, alongside the spatial distribution of distorted grains and the absence of adcumulate textures, suggests that olivines were deformed within melt-rich mush piles accumulating within the summit reservoir. Quantitative analysis of subgrain geometry reveals that olivines experienced differential stresses of ∼3-12 MPa, consistent with their storage in mush piles with thicknesses of a few hundred metres. Overall, our microstructural analysis of erupted crystals provides novel insights into mush-rich magmatic systems. |
format |
Article in Journal/Newspaper |
author |
Wieser, Penny E Edmonds, Marie Maclennan, John Wheeler, John |
spellingShingle |
Wieser, Penny E Edmonds, Marie Maclennan, John Wheeler, John Microstructural constraints on magmatic mushes under Kīlauea Volcano, Hawai'i. |
author_facet |
Wieser, Penny E Edmonds, Marie Maclennan, John Wheeler, John |
author_sort |
Wieser, Penny E |
title |
Microstructural constraints on magmatic mushes under Kīlauea Volcano, Hawai'i. |
title_short |
Microstructural constraints on magmatic mushes under Kīlauea Volcano, Hawai'i. |
title_full |
Microstructural constraints on magmatic mushes under Kīlauea Volcano, Hawai'i. |
title_fullStr |
Microstructural constraints on magmatic mushes under Kīlauea Volcano, Hawai'i. |
title_full_unstemmed |
Microstructural constraints on magmatic mushes under Kīlauea Volcano, Hawai'i. |
title_sort |
microstructural constraints on magmatic mushes under kīlauea volcano, hawai'i. |
publisher |
Nature communications |
publishDate |
2020 |
url |
https://doi.org/10.17863/CAM.48954 https://www.repository.cam.ac.uk/handle/1810/301886 |
genre |
Iceland |
genre_facet |
Iceland |
op_source |
essn: 2041-1723 nlmid: 101528555 |
op_relation |
doi:10.17863/CAM.48954 https://www.repository.cam.ac.uk/handle/1810/301886 |
op_rights |
Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.17863/CAM.48954 |
_version_ |
1772815813274763264 |