Formation of Distinct Granitic Magma Batches by Partial Melting of Hybrid Lower Crust in the Izu Arc Collision Zone, Central Japan

Saito, Satoshi; Arima, Makoto; Nakajima, Takahito; Misawa, K.; Kimura, Jun–Ichi

doi:10.1093/petrology/egm037

Cited by 44 publications

(80 citation statements)

References 66 publications

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“…Petrogenesis of the Izu Collision Zone granitoid plutons together with other oceanic arc collision related magmatism collectively suggest that collision has played an important role in transforming juvenile oceanic arc into mature continental crust. Takahashi and Saito, 1997;Saito et al, 2004Saito et al, , 2007aSaito et al, , 2007bSaito et al, , 2012 (Condie, 1993;Gao et al, 1998;Borodin, 1998;Wedepohl, 1995;Rudnick and Gao, 2003) . SiO 2 versus SrI (at zircon U Pb age) of the rocks of the Tanzawa plutonic complex (Kawate, 1996) (a), the Kofu granitic complex (b), and the Kaikomagatake pluton (c).…”

Section: 齊藤mentioning

confidence: 99%

“…SiO 2 versus SrI (at zircon U Pb age) of the rocks of the Tanzawa plutonic complex (Kawate, 1996) (a), the Kofu granitic complex (b), and the Kaikomagatake pluton (c). The compositionalˆeld of Izu Bonin arc basaltic rocks (Taylor and Nesbitt, 1998;Hochstaedter et al, 2001) and Shimanto metasedimentary rocks in the Izu Collision Zone (Saito et al, 2004(Saito et al, , 2007a(Saito et al, , 2007b are also shown for comparison.…”

Section: 齊藤mentioning

confidence: 99%

“…Table 2). Bold italic words indicate the petrogenetic processes suggested by previous studies (Kawate and Arima, 1998;Saito et al, 2007b;Saito et al, 2012). Kawate (1996).…”

mentioning

confidence: 92%

“…齊藤哲る組成変化だけでもたらされるのではなく，親マグマの組成が既に多様であることがわかる( Table 2) (Kawate and Arima, 1998;Saito et al, 2004;Saito et al, 2007b;Saito et al, 2012). Qtz, quartz; Pl, plagioclase; Kfs, K feldspar; Bt, biotite; Hbl, hornblende; Mag, magnetite.…”

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Geochemical diversity of Neogene granitoid plutons in the Izu Collision Zone: implications for transformation of juvenile oceanic arc into mature continental crust

Saito¹

2014

Japanese Magazine of Mineralogical and Petrological Sciences

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Section: 齊藤mentioning

confidence: 99%

Section: 齊藤mentioning

confidence: 99%

“…Table 2). Bold italic words indicate the petrogenetic processes suggested by previous studies (Kawate and Arima, 1998;Saito et al, 2007b;Saito et al, 2012). Kawate (1996).…”

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confidence: 92%

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Geochemical diversity of Neogene granitoid plutons in the Izu Collision Zone: implications for transformation of juvenile oceanic arc into mature continental crust

Saito¹

2014

Japanese Magazine of Mineralogical and Petrological Sciences

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“…the Izu-Bonin-Mariana (IBM) arc has been colliding against the Honshu arc from Middle Miocene (e.g., Saito et al, 2007;Yamada and Tagami, 2008). Tani et al (2010) concluded that the Tanzawa complex was not denuded middle crust of the IBM arc but formed during arc-arc collision.…”

Section: Tanzawa Plutonic Complex In Izu Collision Zone Central Japanmentioning

confidence: 99%

A procedure for calculating a consistent set of closure temperatures and cooling rate using Dodson’s formula

Maeda

Zeniya

Kuramoto

et al. 2011

Jour. Geol. Soc. Japan

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Crustal structure of the Izu collision zone in central Japan from seismic refraction data

et al. 2013

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[1] The Izu-Bonin arc (IBA) has been colliding with the more northerly Honshu arc since the middle Miocene, forming a globally unique active Izu arc-arc collision zone (ICZ) in central Japan. To determine crustal structure of the ICZ, we constrain P and S wave velocities from active source refraction data. The velocity structures reveal that the style of collisions of the Misaka, Tanzawa, and Izu blocks, which were derived from the IBA, has been controlled by subduction of the IBA. High-velocity rocks (Vp > 6.2 km/s) observed in the ICZ continuously extend to deeper crust, suggesting that plutonic rocks, formed by partial melting of the subducted IBA crust, intruded into the Honshu arc crust and the accreted crustal blocks of the IBA. The northernmost major fault in the ICZ dips southeastward, which is in clear contrast with other major northwestward dipping faults farther southeast. In the northernmost part of the ICZ, the upper 5 km crust of the Misaka block was delaminated from its lower part and obducted onto the Honshu arc. The Tanzawa block, southeast of the Misaka block, is bounded by northwestward dipping faults and is characterized by crustal stacking. A low-velocity sedimentary layer between the Tanzawa and Izu blocks dips northwestward along the collisional boundary and reaches~5 km depth, suggesting that the Izu block underthrust beneath the Tanzawa block. The overall geometry of the collisional boundaries exhibits a doubly vergent system, which is characterized by inward-dipping thrust faults on both sides.Citation: Arai, R., T. Iwasaki, H. Sato, S. Abe, and N. Hirata (2013), Crustal structure of the Izu collision zone in central Japan from seismic refraction data,

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Formation of Distinct Granitic Magma Batches by Partial Melting of Hybrid Lower Crust in the Izu Arc Collision Zone, Central Japan

Cited by 44 publications

References 66 publications

Geochemical diversity of Neogene granitoid plutons in the Izu Collision Zone: implications for transformation of juvenile oceanic arc into mature continental crust

Geochemical diversity of Neogene granitoid plutons in the Izu Collision Zone: implications for transformation of juvenile oceanic arc into mature continental crust

A procedure for calculating a consistent set of closure temperatures and cooling rate using Dodson’s formula

Crustal structure of the Izu collision zone in central Japan from seismic refraction data

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