Slab to back-arc to arc: fluid and melt pathways through the mantle wedge beneath the Lesser Antilles
<p>Volatiles expelled from subducted plates promote melting of the overlying warm mantle, feeding arc volcanism. However, debates continue over the factors controlling melt generation and transport, and how these determine the placement of volcanoes. To broaden our synoptic view of these funda...
| Հիմնական հեղինակներ: | , , , , , , , , , , , , , , , , , |
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| Այլ հեղինակներ: | |
| Ձևաչափ: | Journal article |
| Լեզու: | English |
| Հրապարակվել է: |
American Association for the Advancement of Science
2023
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| _version_ | 1826310363678769152 |
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| author | Hicks, SP Bie, L Rychert, CA Harmon, N Goes, S Rietbrock, A Wei, SS Collier, JS Henstock, TJ Lynch, L Prytulak, J Macpherson, CG Schlaphorst, D Wilkinson, JJ Blundy, JD Cooper, GF Davy, RG Kendall, J-M |
| author2 | VoiLA Working Group |
| author_facet | VoiLA Working Group Hicks, SP Bie, L Rychert, CA Harmon, N Goes, S Rietbrock, A Wei, SS Collier, JS Henstock, TJ Lynch, L Prytulak, J Macpherson, CG Schlaphorst, D Wilkinson, JJ Blundy, JD Cooper, GF Davy, RG Kendall, J-M |
| author_sort | Hicks, SP |
| collection | OXFORD |
| description | <p>Volatiles expelled from subducted plates promote melting of the overlying warm mantle, feeding arc volcanism. However, debates continue over the factors controlling melt generation and transport, and how these determine the placement of volcanoes. To broaden our synoptic view of these fundamental mantle wedge processes, we image seismic attenuation beneath the Lesser Antilles arc, an end-member system that slowly subducts old, tectonized lithosphere. Punctuated anomalies with high ratios of bulk-to-shear attenuation (<em>Q</em><sub>κ</sub><sup>−1</sup>/<em>Q</em><sub>μ</sub><sup>−1</sup> > 0.6) and <em>V<sub>P</sub></em>/<em>V<sub>S</sub></em> (>1.83) lie 40 km above the slab, representing expelled fluids that are retained in a cold boundary layer, transporting fluids toward the back-arc. The strongest attenuation (1000/<em>Q<sub>S</sub></em> ~ 20), characterizing melt in warm mantle, lies beneath the back-arc, revealing how back-arc mantle feeds arc volcanoes. Melt ponds under the upper plate and percolates toward the arc along structures from earlier back-arc spreading, demonstrating how slab dehydration, upper-plate properties, past tectonics, and resulting melt pathways collectively condition volcanism.</p> |
| first_indexed | 2024-03-07T07:50:50Z |
| format | Journal article |
| id | oxford-uuid:ff1796ee-b5b7-460f-a8a7-b8dbd9273346 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T07:50:50Z |
| publishDate | 2023 |
| publisher | American Association for the Advancement of Science |
| record_format | dspace |
| spelling | oxford-uuid:ff1796ee-b5b7-460f-a8a7-b8dbd92733462023-07-03T15:44:53ZSlab to back-arc to arc: fluid and melt pathways through the mantle wedge beneath the Lesser AntillesJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:ff1796ee-b5b7-460f-a8a7-b8dbd9273346EnglishSymplectic ElementsAmerican Association for the Advancement of Science2023Hicks, SPBie, LRychert, CAHarmon, NGoes, SRietbrock, AWei, SSCollier, JSHenstock, TJLynch, LPrytulak, JMacpherson, CGSchlaphorst, DWilkinson, JJBlundy, JDCooper, GFDavy, RGKendall, J-MVoiLA Working Group<p>Volatiles expelled from subducted plates promote melting of the overlying warm mantle, feeding arc volcanism. However, debates continue over the factors controlling melt generation and transport, and how these determine the placement of volcanoes. To broaden our synoptic view of these fundamental mantle wedge processes, we image seismic attenuation beneath the Lesser Antilles arc, an end-member system that slowly subducts old, tectonized lithosphere. Punctuated anomalies with high ratios of bulk-to-shear attenuation (<em>Q</em><sub>κ</sub><sup>−1</sup>/<em>Q</em><sub>μ</sub><sup>−1</sup> > 0.6) and <em>V<sub>P</sub></em>/<em>V<sub>S</sub></em> (>1.83) lie 40 km above the slab, representing expelled fluids that are retained in a cold boundary layer, transporting fluids toward the back-arc. The strongest attenuation (1000/<em>Q<sub>S</sub></em> ~ 20), characterizing melt in warm mantle, lies beneath the back-arc, revealing how back-arc mantle feeds arc volcanoes. Melt ponds under the upper plate and percolates toward the arc along structures from earlier back-arc spreading, demonstrating how slab dehydration, upper-plate properties, past tectonics, and resulting melt pathways collectively condition volcanism.</p> |
| spellingShingle | Hicks, SP Bie, L Rychert, CA Harmon, N Goes, S Rietbrock, A Wei, SS Collier, JS Henstock, TJ Lynch, L Prytulak, J Macpherson, CG Schlaphorst, D Wilkinson, JJ Blundy, JD Cooper, GF Davy, RG Kendall, J-M Slab to back-arc to arc: fluid and melt pathways through the mantle wedge beneath the Lesser Antilles |
| title | Slab to back-arc to arc: fluid and melt pathways through the mantle wedge beneath the Lesser Antilles |
| title_full | Slab to back-arc to arc: fluid and melt pathways through the mantle wedge beneath the Lesser Antilles |
| title_fullStr | Slab to back-arc to arc: fluid and melt pathways through the mantle wedge beneath the Lesser Antilles |
| title_full_unstemmed | Slab to back-arc to arc: fluid and melt pathways through the mantle wedge beneath the Lesser Antilles |
| title_short | Slab to back-arc to arc: fluid and melt pathways through the mantle wedge beneath the Lesser Antilles |
| title_sort | slab to back arc to arc fluid and melt pathways through the mantle wedge beneath the lesser antilles |
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