Across-arc Variations in Geochemistry of Oligocene to Quaternary Basalts from the NE Japan Arc: Constraints on Source Composition, Mantle Melting and Slab Input Composition

Shuto, Kenji; Nohara-Imanaka, R.; Sato, Makoto; Takahashi, Takehiro; Takazawa, Eiichi; Kawabata, Hiroshi; Takanashi, K.; Ban, Masao; Watanabe, Naoharu; Fujibayashi, Norie

doi:10.1093/petrology/egv073

Cited by 27 publications

(31 citation statements)

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“…The Sr and Nd isotopic compositions of six selected cumulates are summarized in Table . The relationship between 143 Nd/ 144 Nd and 87 Sr/ 86 Sr is shown in Figure , along with previously reported mafic xenoliths and host magmas from Ichinomegata (Yamamoto et al, ) and Sannomegata maars (Kimura & Yoshida, ; Kuritani et al, ; Shuto et al, ), and volcanic rocks from Toga and Kampu volcanoes (Yamamoto et al, ). Mafic xenoliths from the Ichinomegata maar demonstrate the mixing of two components: “parental magma” with 143 Nd/ 144 Nd = 0.51295 and 87 Sr/ 86 Sr = 0.70293, and “regional lower crust” with 143 Nd/ 144 Nd = 0.51259 and 87 Sr/ 86 Sr = 0.70522, with a concentration ratio of (Sr/Nd) magma /(Sr/Nd) crust = 0.2–0.5.…”

Section: Resultssupporting

confidence: 76%

“…The colored and gray solid squares represent the cumulate xenoliths analyzed in this study and mafic xenoliths reported by Yamamoto et al (2013), respectively. The light blue circle and triangles represent the Ichinomegata and Sannomegata volcanic rocks hosting the xenoliths, respectively (Kimura & Yoshida, 2006;Kuritani et al, 2014;Shuto et al, 2015;Yamamoto et al, 2013). The open diamond and pentagon are volcanic rocks from the Kampu and Toga volcanoes, respectively (Yamamoto et al, 2013).…”

Section: Bulk Rock Chemistrymentioning

confidence: 99%

“…Representative Chemical Compositions of Constituent Minerals TiO 2 Al 2 O 3 Cr 2 O 3 FeO b MnO MgO CaO Na 2 O K 2 O V 2 O 3 Total Mg# or An# aKuritani et al, 2014;Shuto et al, 2015), and volcanic rocks from Toga and Kampu volcanoes(Yamamoto et al, 2013). Mafic xenoliths from the Ichinomegata maar demonstrate the mixing of two components: ''parental magma'' with 143 Nd/ 144 Nd 5 0.51295 and 87 Sr/ 86 Sr 5 0.70293, and ''regional lower crust'' with 143 Nd/ 144 Nd 5 0.51259 and 87 Sr/ 86 Sr 5 0.70522, with a concentration ratio of (Sr/Nd) magma /(Sr/ Nd) crust 5 0.2-0.5.…”

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confidence: 99%

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Differentiation of a Hydrous Arc Magma Recorded in Melt Inclusions in Deep Crustal Cumulate Xenoliths from Ichinomegata Maar, NE Japan

Yanagida

Nakamura

Yasuda

et al. 2018

Geochem Geophys Geosyst

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The Ichinomegata maar, located in the back‐arc side of the northeastern Japan arc, erupted calc‐alkaline andesitic magma with abundant deep‐crustal and mantle xenoliths at about 60–80 ka. We investigated the relationship between fractionated solids and differentiated silicic melts at middle to lower crust conditions through petrologic analyses of hornblende‐bearing cumulate xenoliths and melt inclusions. The Sr and Nd isotope compositions are similar to those of the host magmas, suggesting their cognate origin. The crystallization sequence is determined to be olivine, spinel → clinopyroxene → hornblende, magnetite → plagioclase → apatite, based on the observation of texture and solid solution compositions. Of the five types of xenolith studied, the leuco‐hornblende gabbro preserved interstitial glass and melt inclusions with a silica content (SiO2) of 63.9–74.0 wt % and high water content (up to 8.1 wt %). Hornblende geobarometry indicates an equilibrium pressure of 0.39–0.64 GPa, which corresponds to a depth of 15–24 km. The delay of plagioclase crystallization due to high water content characterizes differentiation of the hydrous arc magma. We successfully constructed an internally consistent differentiation model of the corundum‐normative calc‐alkaline trend to the silicic melt inclusions, starting from primitive basalt via successive fractionation of a calculated wherlite and cumulate xenoliths. In middle to late stage differentiation, hornblende gabbros are the dominantly fractionated assemblages. Our results are consistent with published differentiation experiments of hydrous arc magmas and the lithology of the deep crust beneath the back arc of the NE Japan arc as estimated from seismic tomography.

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Section: Resultssupporting

confidence: 76%

Section: Bulk Rock Chemistrymentioning

confidence: 99%

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confidence: 99%

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Differentiation of a Hydrous Arc Magma Recorded in Melt Inclusions in Deep Crustal Cumulate Xenoliths from Ichinomegata Maar, NE Japan

Yanagida

Nakamura

Yasuda

et al. 2018

Geochem Geophys Geosyst

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“…Вариации петрогенных элементов в среднемиоцен-раннеплиоценовых вулканических породах о. Итуруп: 1−3 -скважины: 1 -1К; 2 -50; 3 -54; 4−5 -о. Кунашир, средний миоцен-плиоцен (Мартынов, 2013;Мартынов и др., 2015;Martynov et al, 2010): 4 -фронтальная зона; 5 -тыловая зона; 6−7 -дуга Северо-Восточной Японии (Ikeda, 1998;Okamura et al, 2016;Shuto et al, 2006Shuto et al, , 2013Shuto et al, , 2015Takanashi et al, 2011): средний миоцен-плиоцен: 6 -фронтальная зона; 7 -тыловая зона. Диаграмма TAS (Le Bas et al, 1986) (Irvine, Baragar, 1971).…”

Section: рисunclassified

“…Диаграмма SiO 2 −FeO*/MgO (в): линия раздела пород толеитовой (Th) и известково-щелочной (CA) серий по (Miyashiro, 1974). (Martynov, 2013;Martynov et al, 2010;: 4 -volcanic front, 5 -back arc; 6−7 -Northeast Japan arc, Middle Miocene-Pliocene (Ikeda, 1998;Okamura et al, 2016;Shuto et al, 2006Shuto et al, , 2013Shuto et al, , 2015Takanashi et al, 2011): 6 -volcanic front; 7 -back arc. а -TAS diagram (Le Bas et al, 1986 Miyashiro, 1974. Рис.…”

Section: рисunclassified

Volcanism of the Early Formation Stage of Iturup Island (Great Kurile Chain)

Федоров¹,

Tsukanov²,

Geptner³

et al. 2021

Bulletin of KRAESC. Earth Sciences

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The article presents new petrogeochemical data on the Middle Miocene-Pliocene volcanic rocks from central part of Iturup Island (Great Kurile Chain). It is shown that volcanism of the Middle Miocene-Early Pliocene age in the central part of the Iturup Island took place in a suprasubduction setting. The distribution of high field strength elements (HFSE) and their ratio in the basaltoids indicate their formation upon partial melting of the depleted upper mantle, while the enrichment of rocks with large ionic lithophilic elements (LILE) indicates both a fluid mantle additive introduced into the melts during the evolution of primary magma and the participation of a low-temperature suprasubduction fluid. The established differences in the composition of the basaltoids of the frontal and rear zones due to the limited number of analyzed samples are considered preliminary. Thus, basaltoids in the rear zone are distinguished by higher concentrations of Th, Pb, HFSE (Nb, Zr, Y, Hf), relative enrichment in LREE, pronounced negative Zr and Hf anomalies, and positive Eu.

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Petrogenesis and tectonic implications of two‐stage Cretaceous bimodal volcanism in the coast of Zhejiang Province, South‐east China

Wang

Hong

et al. 2021

Geological Journal

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Shipu volcanic area is located at the east of the Jiangshan‐Shaoxing Fault zone, an important part of the Mesozoic volcanic belt in the coastal south‐east China, which provides an excellent opportunity to study the origin of rarely outcropped and coexisting bimodal volcanic rocks and bimodal dyke swarms. Two stages of bimodal volcanic rocks and dyke swarms yield zircon U–Pb ages of ca. 118–121 Ma and ca. 95–93 Ma, respectively. Both bimodal magmatic rocks show enrichment in LILEs and LREEs, but depletion in HFSEs. Basalts of the early‐stage bimodal volcanism have whole‐rock (87Sr/86Sr)i ratio of 0.71121, εNd(t) value of −8.0, and zircon εHf(t) values of −19.3 to −11.7, while the contemporaneous rhyolites show whole‐rock (87Sr/86Sr)i ratios of 0.71023 to 0.71106, εNd(t) values of −7.5 to −6.6 and zircon εHf(t) values of −15.3 to −7.6 with TDMC of 0.96–2.11 Ga. Basaltic dykes of the late‐stage bimodal volcanism have whole‐rock (87Sr/86Sr)i ratios of 0.70898 to 0.70908, εNd(t) values of −5.8 to −5.7 and zircon εHf(t) values of −10.5 to 2.9, while coexisting rhyolitic dykes display whole‐rock (87Sr/86Sr)i ratios of 0.69618 to 0.71172, εNd(t) values of −3.1 to −3.0 and zircon εHf(t) values of −9.2 to 11.9 with TDMC of 0.37–1.71 Ga. These features suggest that the early‐stage basalts could be derived from partial melting of an enriched lithospheric mantle metasomatized by slab‐derived fluids, and its corresponding felsic end‐member is the product of partial melting of Proterozoic middle‐lower crust due to underplating of basaltic magmas with minor addition of mantle materials. As for the late‐stage bimodal volcanism, the basaltic dykes are also derived from an enriched mantle similar to the early‐stage counterpart. However, the rhyolitic dykes mainly originated from partial melting of ancient lower crustal materials with abundant input from the depleted mantle. As a whole, two stages of bimodal magmatism in Shipu area provide direct constraints on regional tectonic transition from an extensional arc setting to a back‐arc setting.

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Across-arc Variations in Geochemistry of Oligocene to Quaternary Basalts from the NE Japan Arc: Constraints on Source Composition, Mantle Melting and Slab Input Composition

Cited by 27 publications

References 101 publications

Differentiation of a Hydrous Arc Magma Recorded in Melt Inclusions in Deep Crustal Cumulate Xenoliths from Ichinomegata Maar, NE Japan

Differentiation of a Hydrous Arc Magma Recorded in Melt Inclusions in Deep Crustal Cumulate Xenoliths from Ichinomegata Maar, NE Japan

Volcanism of the Early Formation Stage of Iturup Island (Great Kurile Chain)

Petrogenesis and tectonic implications of two‐stage Cretaceous bimodal volcanism in the coast of Zhejiang Province, South‐east China

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