Diffusion chronometry and the timescales of magmatic processes
Volcanic eruptions can represent major societal hazards. Placing tighter bounds on the timescales of magmatic processes that precede eruptions is, therefore, important for volcano monitoring and forecasting. Diffusion chronometry, where volcanic crystals that contain chemical gradients are treated a...
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| 格式: | Journal Article |
| 语言: | English |
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2020
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| 在线阅读: | https://hdl.handle.net/10356/143506 |
| _version_ | 1826123761603051520 |
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| author | Costa, Fidel Shea, Thomas Ubide, Teresa |
| author2 | Asian School of the Environment |
| author_facet | Asian School of the Environment Costa, Fidel Shea, Thomas Ubide, Teresa |
| author_sort | Costa, Fidel |
| collection | NTU |
| description | Volcanic eruptions can represent major societal hazards. Placing tighter bounds on the timescales of magmatic processes that precede eruptions is, therefore, important for volcano monitoring and forecasting. Diffusion chronometry, where volcanic crystals that contain chemical gradients are treated as time capsules, allows the timescale of various magmatic processes to be constrained. In this Review, we discuss the basics of diffusion chronometry and describe how re-equilibration via chemical diffusion provides insights into the timescales of magma storage, ascent and eruption. Crystals from mafic volcanoes record timescales of days to years between magma intrusion and eruption, which broadly match those recorded by monitoring data (such as increased seismicity). The timescales recorded in crystals from large silicic calderas, however, are typically longer than those from mafic volcanoes, spanning decades to millennia, but almost two orders of magnitude shorter than the timescales obtained by U-Th isotope disequilibria in zircon. The cause of this discrepancy is debated but likely reflects the protracted magma accumulation and complex thermal history that many crystals experience before eruption. Diffusion chronometry adds the fourth dimension to volcano science (that is, time), and advances in analytical and experimental approaches (such as NanoSIMS) open up new opportunities for understanding magmatic systems. |
| first_indexed | 2024-10-01T06:09:55Z |
| format | Journal Article |
| id | ntu-10356/143506 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:09:55Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1435062023-02-28T16:41:17Z Diffusion chronometry and the timescales of magmatic processes Costa, Fidel Shea, Thomas Ubide, Teresa Asian School of the Environment Earth Observatory of Singapore Science::Geology::Volcanoes and earthquakes Geochemistry Volcanology Volcanic eruptions can represent major societal hazards. Placing tighter bounds on the timescales of magmatic processes that precede eruptions is, therefore, important for volcano monitoring and forecasting. Diffusion chronometry, where volcanic crystals that contain chemical gradients are treated as time capsules, allows the timescale of various magmatic processes to be constrained. In this Review, we discuss the basics of diffusion chronometry and describe how re-equilibration via chemical diffusion provides insights into the timescales of magma storage, ascent and eruption. Crystals from mafic volcanoes record timescales of days to years between magma intrusion and eruption, which broadly match those recorded by monitoring data (such as increased seismicity). The timescales recorded in crystals from large silicic calderas, however, are typically longer than those from mafic volcanoes, spanning decades to millennia, but almost two orders of magnitude shorter than the timescales obtained by U-Th isotope disequilibria in zircon. The cause of this discrepancy is debated but likely reflects the protracted magma accumulation and complex thermal history that many crystals experience before eruption. Diffusion chronometry adds the fourth dimension to volcano science (that is, time), and advances in analytical and experimental approaches (such as NanoSIMS) open up new opportunities for understanding magmatic systems. National Research Foundation (NRF) Accepted version Singapore National Research Foundation Investigatorship Award, grant number NRF-NRFI2017-06 2020-09-07T02:43:09Z 2020-09-07T02:43:09Z 2020 Journal Article Costa, F., Shea, T., & Ubide, T. (2020). Diffusion chronometry and the timescales of magmatic processes, Nature Reviews Earth and Environment, 1(4), 201–214. doi:10.1038/ s43017-020-0038- x - https://hdl.handle.net/10356/143506 10.1038/ s43017-020-0038- x 4 1 201 214 en Nature Reviews Earth and Environment © 2020 Springer Nature Limited. All rights reserved. This paper was published in Nature Reviews Earth and Environment and is made available with permission of Springer Nature Limited. application/pdf application/pdf |
| spellingShingle | Science::Geology::Volcanoes and earthquakes Geochemistry Volcanology Costa, Fidel Shea, Thomas Ubide, Teresa Diffusion chronometry and the timescales of magmatic processes |
| title | Diffusion chronometry and the timescales of magmatic processes |
| title_full | Diffusion chronometry and the timescales of magmatic processes |
| title_fullStr | Diffusion chronometry and the timescales of magmatic processes |
| title_full_unstemmed | Diffusion chronometry and the timescales of magmatic processes |
| title_short | Diffusion chronometry and the timescales of magmatic processes |
| title_sort | diffusion chronometry and the timescales of magmatic processes |
| topic | Science::Geology::Volcanoes and earthquakes Geochemistry Volcanology |
| url | https://hdl.handle.net/10356/143506 |
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