Subduction dynamics: From the trench to the core‐mantle boundary
Subduction occurs along convergent plate boundaries where one of the colliding lithospheric plates descends into the mantle. Subduction zones are recognized where plates converge at ∼2–15 cm/yr, although well developed trenches and volcanic arcs (e.g. the line of active volcanoes lying parallel to m...
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ftunivrhodeislan:oai:digitalcommons.uri.edu:gsofacpubs-2609 2024-01-14T10:08:17+01:00 Subduction dynamics: From the trench to the core‐mantle boundary Kincaid, Chris 1995-01-01T08:00:00Z https://digitalcommons.uri.edu/gsofacpubs/1640 https://doi.org/10.1029/95RG00437 unknown DigitalCommons@URI https://digitalcommons.uri.edu/gsofacpubs/1640 doi:10.1029/95RG00437 https://doi.org/10.1029/95RG00437 Graduate School of Oceanography Faculty Publications text 1995 ftunivrhodeislan https://doi.org/10.1029/95RG00437 2023-12-18T19:10:06Z Subduction occurs along convergent plate boundaries where one of the colliding lithospheric plates descends into the mantle. Subduction zones are recognized where plates converge at ∼2–15 cm/yr, although well developed trenches and volcanic arcs (e.g. the line of active volcanoes lying parallel to most ocean trenches, such as the Aleutian Islands in the North Pacific) occur when convergence rates are higher, 4–10 cm/yr. This report is meant to provide a brief review on the general topic of subduction dynamics. A recent spin on subduction studies is the growing realization that the need to understand this global Earth process may be argued not only on purely scientific grounds, but also in terms of societal relevance. While subducting slabs of oceanic lithosphere clearly provide the dominant driving force for mantle dynamics and plate tectonics, over half of the Earth's present 40,000 km of subduction zones are associated with continental margins where a large and rapidly increasing percentage of the Earth's population resides. Subductioninduced hazards along active continental margins include those associated with volcanic hazards (Blong, 1984; Tilling, 1989) such as lava flows, pyroclastic flows and ash fallout and tectonic processes, such as faulting, tsunamis and earthquakes. With regards to earthquake hazards, all of the great (magnitude >9) earthquakes in recorded history have occurred at subduction zones, with 50% of all energy released since 1900 being in four events (1964‐Alaska; 1960‐Chile; 1957‐ Aleutians; 1952‐Kamchatka). Subduction zone hazards have significant impact on long time scales, such as contributions to global climate change (Robock, 1991; Simarski, 1992; Johnson, 1993; Bluth et al., 1993) and short time scales such as airline safety (Casadevall, 1992). Moreover, accretionary wedges are important in terms of resource potential and trenches have occasionally been suggested as nuclear waste disposal sites. Copyright 1995 by the American Geophysical Union. Text Kamchatka Alaska Aleutian Islands University of Rhode Island: DigitalCommons@URI Pacific Reviews of Geophysics 33 S1 401 412 |
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University of Rhode Island: DigitalCommons@URI |
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ftunivrhodeislan |
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description |
Subduction occurs along convergent plate boundaries where one of the colliding lithospheric plates descends into the mantle. Subduction zones are recognized where plates converge at ∼2–15 cm/yr, although well developed trenches and volcanic arcs (e.g. the line of active volcanoes lying parallel to most ocean trenches, such as the Aleutian Islands in the North Pacific) occur when convergence rates are higher, 4–10 cm/yr. This report is meant to provide a brief review on the general topic of subduction dynamics. A recent spin on subduction studies is the growing realization that the need to understand this global Earth process may be argued not only on purely scientific grounds, but also in terms of societal relevance. While subducting slabs of oceanic lithosphere clearly provide the dominant driving force for mantle dynamics and plate tectonics, over half of the Earth's present 40,000 km of subduction zones are associated with continental margins where a large and rapidly increasing percentage of the Earth's population resides. Subductioninduced hazards along active continental margins include those associated with volcanic hazards (Blong, 1984; Tilling, 1989) such as lava flows, pyroclastic flows and ash fallout and tectonic processes, such as faulting, tsunamis and earthquakes. With regards to earthquake hazards, all of the great (magnitude >9) earthquakes in recorded history have occurred at subduction zones, with 50% of all energy released since 1900 being in four events (1964‐Alaska; 1960‐Chile; 1957‐ Aleutians; 1952‐Kamchatka). Subduction zone hazards have significant impact on long time scales, such as contributions to global climate change (Robock, 1991; Simarski, 1992; Johnson, 1993; Bluth et al., 1993) and short time scales such as airline safety (Casadevall, 1992). Moreover, accretionary wedges are important in terms of resource potential and trenches have occasionally been suggested as nuclear waste disposal sites. Copyright 1995 by the American Geophysical Union. |
format |
Text |
author |
Kincaid, Chris |
spellingShingle |
Kincaid, Chris Subduction dynamics: From the trench to the core‐mantle boundary |
author_facet |
Kincaid, Chris |
author_sort |
Kincaid, Chris |
title |
Subduction dynamics: From the trench to the core‐mantle boundary |
title_short |
Subduction dynamics: From the trench to the core‐mantle boundary |
title_full |
Subduction dynamics: From the trench to the core‐mantle boundary |
title_fullStr |
Subduction dynamics: From the trench to the core‐mantle boundary |
title_full_unstemmed |
Subduction dynamics: From the trench to the core‐mantle boundary |
title_sort |
subduction dynamics: from the trench to the core‐mantle boundary |
publisher |
DigitalCommons@URI |
publishDate |
1995 |
url |
https://digitalcommons.uri.edu/gsofacpubs/1640 https://doi.org/10.1029/95RG00437 |
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Pacific |
geographic_facet |
Pacific |
genre |
Kamchatka Alaska Aleutian Islands |
genre_facet |
Kamchatka Alaska Aleutian Islands |
op_source |
Graduate School of Oceanography Faculty Publications |
op_relation |
https://digitalcommons.uri.edu/gsofacpubs/1640 doi:10.1029/95RG00437 https://doi.org/10.1029/95RG00437 |
op_doi |
https://doi.org/10.1029/95RG00437 |
container_title |
Reviews of Geophysics |
container_volume |
33 |
container_issue |
S1 |
container_start_page |
401 |
op_container_end_page |
412 |
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1788062721106771968 |