Magmatic flare-up causes crustal thickening at the transition from subduction to continental collision
Above subduction zones, magma production rate and crustal generation can increase by an order of magnitude during narrow time intervals known as magmatic flare-ups. However, the consequences of these events in the deep arc environment remain poorly understood. Here we use petrological and in-situ zi...
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| Veröffentlicht in: | Communications earth & environment 2021-12, Vol.2 (1), Article 41 |
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| creator | Ganade, Carlos E. Lanari, Pierre Rubatto, Daniela Hermann, Joerg Weinberg, Roberto F. Basei, Miguel A. S. Tesser, Lucas R. Caby, Renaud Agbossoumondé, Yao Ribeiro, Caroline M. |
| description | Above subduction zones, magma production rate and crustal generation can increase by an order of magnitude during narrow time intervals known as magmatic flare-ups. However, the consequences of these events in the deep arc environment remain poorly understood. Here we use petrological and in-situ zircon dating techniques to investigate the root of a continental arc within the collisional West Gondwana Orogen that is now exposed in the Kabyé Massif, Togo. We show that gabbros intruded 670 million years ago at 20–25 km depth were transformed to eclogites by 620 million years ago at 65–70 km depth. This was coeval with extensive magmatism at 20–40 km depth, indicative of a flare-up event which peaked just prior to the subduction of the continental margin. We propose that increased H
2
O flux from subduction of serpentinized mantle in the hyper-extended margin of the approaching continent was responsible for the increased magma productivity and crustal thickening. |
| doi_str_mv | 10.1038/s43247-021-00103-z |
| format | Article |
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O flux from subduction of serpentinized mantle in the hyper-extended margin of the approaching continent was responsible for the increased magma productivity and crustal thickening.</description><identifier>ISSN: 2662-4435</identifier><identifier>EISSN: 2662-4435</identifier><identifier>DOI: 10.1038/s43247-021-00103-z</identifier><language>eng</language><publisher>London: Nature Publishing Group</publisher><subject>Continental margins ; Dating techniques ; Dehydration ; Geochronology ; Gondwana ; Isotopes ; Magma ; Massifs ; Orogeny ; Sciences of the Universe ; Subduction (geology) ; Thickening ; Zircon</subject><ispartof>Communications earth & environment, 2021-12, Vol.2 (1), Article 41</ispartof><rights>The Author(s) 2021. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><rights>Attribution</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c354t-a4ff535db6c5b977b25adf6616525a05669f3844aa63201da0c1d7f840f58a63</citedby><cites>FETCH-LOGICAL-c354t-a4ff535db6c5b977b25adf6616525a05669f3844aa63201da0c1d7f840f58a63</cites><orcidid>0000-0001-8360-3592 ; 0000-0002-7425-7904 ; 0000-0001-7253-7630 ; 0000-0001-9420-8918 ; 0000-0002-2896-0551 ; 0000-0001-8303-0771</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>230,314,776,780,860,881,27901,27902</link.rule.ids><backlink>$$Uhttps://insu.hal.science/insu-03661280$$DView record in HAL$$Hfree_for_read</backlink></links><search><creatorcontrib>Ganade, Carlos E.</creatorcontrib><creatorcontrib>Lanari, Pierre</creatorcontrib><creatorcontrib>Rubatto, Daniela</creatorcontrib><creatorcontrib>Hermann, Joerg</creatorcontrib><creatorcontrib>Weinberg, Roberto F.</creatorcontrib><creatorcontrib>Basei, Miguel A. S.</creatorcontrib><creatorcontrib>Tesser, Lucas R.</creatorcontrib><creatorcontrib>Caby, Renaud</creatorcontrib><creatorcontrib>Agbossoumondé, Yao</creatorcontrib><creatorcontrib>Ribeiro, Caroline M.</creatorcontrib><title>Magmatic flare-up causes crustal thickening at the transition from subduction to continental collision</title><title>Communications earth & environment</title><description>Above subduction zones, magma production rate and crustal generation can increase by an order of magnitude during narrow time intervals known as magmatic flare-ups. However, the consequences of these events in the deep arc environment remain poorly understood. Here we use petrological and in-situ zircon dating techniques to investigate the root of a continental arc within the collisional West Gondwana Orogen that is now exposed in the Kabyé Massif, Togo. We show that gabbros intruded 670 million years ago at 20–25 km depth were transformed to eclogites by 620 million years ago at 65–70 km depth. This was coeval with extensive magmatism at 20–40 km depth, indicative of a flare-up event which peaked just prior to the subduction of the continental margin. We propose that increased H
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O flux from subduction of serpentinized mantle in the hyper-extended margin of the approaching continent was responsible for the increased magma productivity and crustal thickening.</description><subject>Continental margins</subject><subject>Dating techniques</subject><subject>Dehydration</subject><subject>Geochronology</subject><subject>Gondwana</subject><subject>Isotopes</subject><subject>Magma</subject><subject>Massifs</subject><subject>Orogeny</subject><subject>Sciences of the Universe</subject><subject>Subduction (geology)</subject><subject>Thickening</subject><subject>Zircon</subject><issn>2662-4435</issn><issn>2662-4435</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><sourceid>BENPR</sourceid><recordid>eNpNUE1LAzEUXETBUvsHPAW8Cav53vRYilqh4qX3kGaTNnWb1CQr2F9v2hXx9GbmzRseU1W3CD4gSMRjogTTpoYY1RAWpT5eVCPMOa4pJezyH76uJintIISYIYxwM6rsm9rsVXYa2E5FU_cHoFWfTAI69imrDuSt0x_GO78BKhdmQI7KJ5dd8MDGsAepX7e9PvMcgA4-O2_86VaHrnOpLG6qK6u6ZCa_c1ytnp9W80W9fH95nc-WtSaM5lpRaxlh7Zprtp42zRoz1VrOEWcFQcb51BJBqVKcYIhaBTVqGysotEwUbVzdD7Fb1clDdHsVv2VQTi5mS-l86iUkJQ0L-IWK-W4wH2L47E3Kchf66Mt7EjMsBIdT0RQXHlw6hpSisX-5CMpT_XKoX5b65bl-eSQ_s4l4zw</recordid><startdate>20211201</startdate><enddate>20211201</enddate><creator>Ganade, Carlos E.</creator><creator>Lanari, Pierre</creator><creator>Rubatto, Daniela</creator><creator>Hermann, Joerg</creator><creator>Weinberg, Roberto F.</creator><creator>Basei, Miguel A. 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| source | Nature Free; DOAJ Directory of Open Access Journals; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; Springer Nature OA Free Journals |
| subjects | Continental margins Dating techniques Dehydration Geochronology Gondwana Isotopes Magma Massifs Orogeny Sciences of the Universe Subduction (geology) Thickening Zircon |
| title | Magmatic flare-up causes crustal thickening at the transition from subduction to continental collision |
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