Details
| Originalsprache | Englisch |
|---|---|
| Seiten (von - bis) | 1439-1450 |
| Seitenumfang | 12 |
| Fachzeitschrift | International Geology Review |
| Jahrgang | 59 |
| Ausgabenummer | 11 |
| Frühes Online-Datum | 16 Jan. 2017 |
| Publikationsstatus | Veröffentlicht - 18 Aug. 2017 |
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.
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in: International Geology Review, Jahrgang 59, Nr. 11, 18.08.2017, S. 1439-1450.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Subduction initiation and ophiolite crust
T2 - new insights from IODP drilling
AU - Reagan, Mark K.
AU - Pearce, Julian A.
AU - Petronotis, Katerina
AU - Almeev, Renat R.
AU - Avery, Aaron J.
AU - Carvallo, Claire
AU - Chapman, Timothy
AU - Christeson, Gail L.
AU - Ferré, Eric C.
AU - Godard, Marguerite
AU - Heaton, Daniel E.
AU - Kirchenbaur, Maria
AU - Kurz, Walter
AU - Kutterolf, Steffen
AU - Li, Hongyan
AU - Li, Yibing
AU - Michibayashi, Katsuyoshi
AU - Morgan, Sally
AU - Nelson, Wendy R.
AU - Prytulak, Julie
AU - Python, Marie
AU - Robertson, Alastair H.F.
AU - Ryan, Jeffrey G.
AU - Sager, William W.
AU - Sakuyama, Tetsuya
AU - Shervais, John W.
AU - Shimizu, Kenji
AU - Whattam, Scott A.
N1 - Funding information: We thank the USSSP for initial funding of US scientists, and NSF grants OCE1558608 (Nelson), OCE1558647 (Reagan), OCE1558689 (Shervais), and OCR1558855 (Ryan), for continued funding. Julian Pearce thanks NERC (UK) for financial support through grant NE/M012034/1). J. Prytulak was supported by NERC grant NE/M010643. S. Kutterolf thanks the German Research Foundation (KU-2685/4-1), and R. Almeev thanks the German Science Foundation (DFG Project AL 1189/8) for financial support. W. Kurz was supported by the Austrian Academy of Sciences and by the Austrian Science Fund (FWF Project P27982-N29). K. Michibayashi was supported by the Japan Society for the Promotion of Science (JSPS: 16H06347) and the Japan Drilling Earth Science Consortium. H.Y. Li acknowledges the support from the State Oceanic Administration (GASI-GEOGE-02). T. Chapman was funded by ANZIC.
PY - 2017/8/18
Y1 - 2017/8/18
N2 - 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.
AB - 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.
KW - basalt
KW - bonin
KW - boninite
KW - drilling
KW - Expedition 352
KW - International Ocean Discovery Program
KW - Izu
KW - ophiolite
KW - Philippine plate
KW - Site U1439
KW - Site U1440
KW - Site U1441
KW - Site U1442
KW - subduction initiation
UR - http://www.scopus.com/inward/record.url?scp=85009477207&partnerID=8YFLogxK
U2 - 10.1080/00206814.2016.1276482
DO - 10.1080/00206814.2016.1276482
M3 - Article
AN - SCOPUS:85009477207
VL - 59
SP - 1439
EP - 1450
JO - International Geology Review
JF - International Geology Review
SN - 0020-6814
IS - 11
ER -