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.
| Original language | English |
|---|---|
| Pages (from-to) | 1-12 |
| Number of pages | 12 |
| Journal | International Geology Review |
| DOIs | |
| Publication status | Accepted/In press - 2017 Jan 14 |
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Keywords
- basalt
- bonin
- boninite
- drilling
- Expedition 352
- International Ocean Discovery Program
- Izu
- ophiolite
- Philippine plate
- Site U1439
- Site U1440
- Site U1441
- Site U1442
- subduction initiation
ASJC Scopus subject areas
- Geology
Cite this
Subduction initiation and ophiolite crust : new insights from IODP drilling. / Reagan, Mark K.; Pearce, Julian A.; Petronotis, Katerina; Almeev, Renat R.; Avery, Aaron J.; Carvallo, Claire; Chapman, Timothy; Christeson, Gail L.; Ferré, Eric C.; Godard, Marguerite; Heaton, Daniel E.; Kirchenbaur, Maria; Kurz, Walter; Kutterolf, Steffen; Li, Hongyan; Li, Yibing; Michibayashi, Katsuyoshi; Morgan, Sally; Nelson, Wendy R.; Prytulak, Julie; Python, Marie; Robertson, Alastair H.F.; Ryan, Jeffrey G.; Sager, William W.; Sakuyama, Tetsuya; Shervais, John W.; Shimizu, Kenji; Whattam, Scott A.
In: International Geology Review, 14.01.2017, p. 1-12.Research output: Contribution to journal › Article
}
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.
PY - 2017/1/14
Y1 - 2017/1/14
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
UR - http://www.scopus.com/inward/citedby.url?scp=85009477207&partnerID=8YFLogxK
U2 - 10.1080/00206814.2016.1276482
DO - 10.1080/00206814.2016.1276482
M3 - Article
AN - SCOPUS:85009477207
SP - 1
EP - 12
JO - International Geology Review
JF - International Geology Review
SN - 0020-6814
ER -