Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/27368
Title: Subduction initiation and ophiolite crust: new insights from IODP drilling
Contributor(s): Reagan, Mark K (author); Pearce, Julian A (author); Petronotis, Katerina (author); Almeev, Renat R (author); Avery, Aaron J (author); Carvallo, Claire (author); Chapman, Timothy  (author)orcid ; Christeson, Gail L (author); Ferre, Eric C (author); Godard, Marguerite (author); Heaton, Daniel E (author); Kirchenbaur, Maria (author); Kurz, Walter (author); Kutterolf, Steffen (author); Li, Hongyan (author); Li, Yibing (author); Michibayashi, Katsuyoshi (author); Morgan, Sally (author); Nelson, Wendy R (author); Prytulak, Julie (author); Python, Marie (author); Robertson, Alastair H F (author); Ryan, Jeffrey G (author); Sager, William W (author); Sakuyama, Tetsuya (author); Shervais, John W (author); Shimizu, Kenji (author); Whattam, Scott A (author)
Publication Date: 2017
Early Online Version: 2017-01-16
DOI: 10.1080/00206814.2016.1276482
Handle Link: https://hdl.handle.net/1959.11/27368
Abstract: International Ocean Discovery Program (IODP) Expedition 352 recovered a high-fidelity record of volcanism related to subduction initiation in the Bonin fore-arc. Two sites (U1440 and U1441) located in deep water nearer to the trench recovered basalts and related rocks; two sites (U1439 and U1442) located in shallower water further from the trench recovered boninites and related rocks. Drilling in both areas ended in dolerites inferred to be sheeted intrusive rocks. The basalts apparently erupted immediately after subduction initiation and have compositions similar to those of the most depleted basalts generated by rapid sea-floor spreading at mid-ocean ridges, with little or no slab input. Subsequent melting to generate boninites involved more depleted mantle and hotter and deeper subducted components as subduction progressed and volcanism migrated away from the trench. This volcanic sequence is akin to that recorded by many ophiolites, supporting a direct link between subduction initiation, fore-arc spreading, and ophiolite genesis.
Publication Type: Journal Article
Source of Publication: International Geology Review, 59(11), p. 1439-1450
Publisher: Taylor & Francis Inc
Place of Publication: United States of America
ISSN: 1938-2839
0020-6814
Fields of Research (FoR) 2008: 040312 Structural Geology
040202 Inorganic Geochemistry
Fields of Research (FoR) 2020: 370503 Igneous and metamorphic petrology
370302 Inorganic geochemistry
Socio-Economic Objective (SEO) 2008: 970104 Expanding Knowledge in the Earth Sciences
Socio-Economic Objective (SEO) 2020: 280107 Expanding knowledge in the earth sciences
Peer Reviewed: Yes
HERDC Category Description: C1 Refereed Article in a Scholarly Journal
Appears in Collections:Journal Article
School of Environmental and Rural Science

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