The systematics of chlorine, fluorine, and water in Izu arc front volcanic rocks: Implications for volatile recycling in subduction zones

Straub, Susanne M.; Layne, Graham D.

doi:10.1016/s0016-7037(03)00307-7

Cited by 234 publications

(186 citation statements)

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“…clusions in this study, assuming H 2 O-rich primary magma is consistent with recent analysis of H 2 O-rich melt inclusions from some island arc volcanoes (e.g., Kent and Elliot, 2002;Straub and Layne, 2003;Wallace, 2005). Of course, we must be aware of the variation of primary H 2 O content.…”

Section: Fig 11 Drawings To Show the Model Of Magma Injection Coolsupporting

confidence: 91%

“…(5) Crystallization differentiation from magma (1100<T(°C)<1150) with low H2O(<0.7 wt.%) Kent and Elliot, 2002;Straub and Layne, 2003;Wallace, 2005). Of course, we must be aware of the variation of primary H 2 O content.…”

Section: Necessity Of Reexamining Primary H 2 O Content At Volcanic Fmentioning

confidence: 99%

“…The lower H 2 O content of the analyzed melt inclusions is probably due to the leakage of volatiles through the host crystal during decompression, eruption and quench. Variation in estimated H 2 O content in the melt at the time of crystallization of plagioclase (3 to 6 wt.%) can be due to polybaric crystallization from H 2 O-saturated melt.Keywords: melt inclusion, Ca-rich plagioclase, island arc low-K tholeiite magma, H 2 O content in melt, hydrous melting experiment tic melt inclusions from the subaqueous Izu arc front ranges from 1 to 5 wt.% (Straub and Layne, 2003). Takagi et al (2005) claimed that optimal H 2 O content for crystallization of Ca-rich plagioclase from island arc tholeiite magma is ~5 wt.%.…”

mentioning

confidence: 99%

“…Primary H 2 O content should be much higher than that previously proposed at the volcanic front (e.g., Sakuyama, 1979;Aoki et al, 1981;Tatsumi et al, 1983) even when taking the effect of ~50 wt.% crystallization differentiation from primary magma et al, 1994) (1) Injection of high T magma (>1150°C) with high (>6 wt.%) H2O content. Magma is saturated with H2O at the time of injection and expected to be nearly aphyric.(2) Crystallization of Ca-rich plagioclase with decreasing temperature.(3) Injection of high T (>1150°C) magma with high (>6 wt.%) H2O content trigers eruption.(5) Crystallization differentiation from magma (1100<T(°C)<1150) with low H2O(<0.7 wt.%) Kent and Elliot, 2002;Straub and Layne, 2003;Wallace, 2005). Of course, we must be aware of the variation of primary H 2 O content.…”

mentioning

confidence: 99%

“…Keywords: melt inclusion, Ca-rich plagioclase, island arc low-K tholeiite magma, H 2 O content in melt, hydrous melting experiment tic melt inclusions from the subaqueous Izu arc front ranges from 1 to 5 wt.% (Straub and Layne, 2003). Takagi et al (2005) claimed that optimal H 2 O content for crystallization of Ca-rich plagioclase from island arc tholeiite magma is ~5 wt.%.…”

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confidence: 99%

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H2O-rich island arc low-K tholeiite magma inferred from Ca-rich plagioclase-melt inclusion equilibria

Hamada

Fujii

2007

Geochem. J.

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In order to quantify H 2 O content and chemical composition of island arc low-K tholeiite magma that crystallized Carich plagioclase, melt inclusions of a typical island arc tholeiite from Izu-Oshima volcano (34°N 44′, 139°E 24′) were analyzed. Composition of studied plagioclase ranges widely from An 83 to An 95 . Composition of studied melt inclusions also shows wide variation, which suggests that the melt inclusions represent various stages of crystallization differentiation at Izu-Oshima volcano. Ca/Na ratios of plagioclase-hosted melt inclusions are comparable with compositions of aphyric lava, which preclude an exotic origin for the Ca-rich plagioclase. Analyzed H 2 O content of the melt inclusions ranges from 0.2 to 2.4 wt.% (0.2 to 1.4 wt.% for plagioclase-hosted melt inclusions and 0.8 to 2.4 wt.% for olivine-hosted melt inclusions).Ca/Na partition coefficient between plagioclase and hydrous basaltic melt, K D(Ca-Na) plag-melt , is empirically calibrated based on experimental data as Based on the equilibria between host plagioclase and melt inclusion and taking effect of overgrowth into consideration, 3 to 6 wt.% H 2 O in melt is required. The lower H 2 O content of the analyzed melt inclusions is probably due to the leakage of volatiles through the host crystal during decompression, eruption and quench. Variation in estimated H 2 O content in the melt at the time of crystallization of plagioclase (3 to 6 wt.%) can be due to polybaric crystallization from H 2 O-saturated melt.Keywords: melt inclusion, Ca-rich plagioclase, island arc low-K tholeiite magma, H 2 O content in melt, hydrous melting experiment tic melt inclusions from the subaqueous Izu arc front ranges from 1 to 5 wt.% (Straub and Layne, 2003). Takagi et al. (2005) claimed that optimal H 2 O content for crystallization of Ca-rich plagioclase from island arc tholeiite magma is ~5 wt.%. However, quantitative discussions on H 2 O content of island arc basalt at the volcanic front have not reached consensus to date. Sakuyama (1979) proposed lateral variation of H 2 O content in northeast Japan arc based on the crystallization sequence and temperature, which lead to the conclusion that the H 2 O content of island arc basalt at the volcanic front was small. Aoki et al. (1981) also proposed similar lateral variations of H 2 O content based on fluorine geochemistry assuming constant proportions of K 2 O:H 2 O:F during fractional crystallization. The 1986 eruption of Izu-Oshima volcano (34°N 44′, 139°E 24′), which is a typical frontal arc volcano and issues island arc low-K tholeiite magma, stimulated the discussion on H 2 O content in island arc basalt. Aramaki and Fujii (1988) calculated the H 2 O content of basaltic melt to explain the INTRODUCTIONQuantifying the H 2 O content of island arc basalt at the volcanic front, especially island arc low-K tholeiite magma, is fundamental in understanding the generation and differentiation of magma at island arc settings. Carich plagioclase (mostly An ≥90 ), commonly found in island arc basalt at the volcan...

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Section: Fig 11 Drawings To Show the Model Of Magma Injection Coolsupporting

confidence: 91%

Section: Necessity Of Reexamining Primary H 2 O Content At Volcanic Fmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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H2O-rich island arc low-K tholeiite magma inferred from Ca-rich plagioclase-melt inclusion equilibria

Hamada

Fujii

2007

Geochem. J.

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Large volume submarine ignimbrites in the Shikoku Basin: An example for explosive volcanism in the Western Pacific during the Late Miocene

Kutterolf

Schindlbeck

Scudder

et al. 2014

Geochem Geophys Geosyst

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During IODP Expedition 322, an interval of Late Miocene (7.6 to 9.1 Ma) tuffaceous and volcaniclastic sandstones was discovered in the Shikoku Basin (Site C0011B), Nankai region. This interval consists of bioturbated silty claystone including four 1-7 m thick interbeds of tuffaceous sandstones (TST) containing 57-82% (by volume) pyroclasts. We use major and trace element glass compositions, as well as radiogenic isotope compositions, to show that the tuffaceous sandstones beds derived from single eruptive events, and that the majority (TST 1, 2, 3a) came from different eruptions from a similar source region, which we have identified to be the Japanese mainland, 350 km away. In particular, diagnostic trace element ratios (e.g., Th/La, Sm/La, Rb/Hf, Th/Nb, and U/Th) and isotopic data indicate a marked contribution from a mantle source beneath continental crust, which is most consistent with a Japanese mainland source and likely excludes the Izu-Bonin island arc and back arc as a source region for the younger TST beds. Nevertheless, some of the chemical data measured on the oldest sandstone bed (TST 3b, Unit IIb) show affinity to or can clearly be attributed to an Izu-Bonin composition. While we cannot completely exclude the possibility that all TST beds derived from unknown and exotic Izu-Bonin source(s), the collected lines of evidence are most consistent with an origin from the paleo-Honshu arc for TST 1 through 3a. We therefore suggest the former collision zone between the Izu-Bonin arc and Honshu paleo-arc as the most likely region where the eruptive products entered the ocean, also concurrent with nearby (200 km) possible Miocene source areas for the tuffaceous sandstones at the paleo-NE-Honshu arc. Estimating the distribution area of the tuffaceous sandstones in the Miocene between this source region and the 350 km distant Expedition 322, using bathymetric constraints, we calculate that the sandstone beds represent minimum erupted magma volumes between 1 and 17 km 3 (Dense Rock Equivalent (DRE)). We conclude that several large volume eruptions occurred during the Late Miocene time next to the collision zone of paleo-Honshu and Izu-Bonin arc and covered the entire Philippine Sea plate with meter thick, sheet-like pyroclastic deposits that are now subducted in the Nankai subduction zone.

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Volatile cycling of H₂O, CO₂, F, and Cl in the HIMU mantle: A new window provided by melt inclusions from oceanic hot spot lavas at Mangaia, Cook Islands

Cabral

Jackson

Koga

et al. 2014

Geochem Geophys Geosyst

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Pb) mantle end-member, thought to result from recycled oceanic crust. Complete geochemical characterization of the HIMU mantle end-member has been inhibited due to a lack of deep submarine glass samples from HIMU localities. We homogenized olivine-hosted melt inclusions separated from Mangaia lavas and the resulting glassy inclusions made possible the first volatile abundances to be obtained from the HIMU mantle end-member. We also report major and trace element abundances and Pb-isotopic ratios on the inclusions, which have HIMU isotopic fingerprints. We evaluate the samples for processes that could modify the volatile and trace element abundances postmantle melting, including diffusive Fe and H 2 O loss, degassing, and assimilation. H 2 O/Ce ratios vary from 119 to 245 in the most pristine Mangaia inclusions; excluding an inclusion that shows evidence for assimilation, the primary magmatic H 2 O/Ce ratios vary up to 200, and are consistent with significant dehydration of oceanic crust during subduction and long-term storage in the mantle. CO 2 concentrations range up to 2346 ppm CO 2 in the inclusions. Relatively high CO 2 in the inclusions, combined with previous observations of carbonate blebs in other Mangaia melt inclusions, highlight the importance of CO 2 for the generation of the HIMU mantle. F/Nd ratios in the inclusions (30 6 9; 2r standard deviation) are higher than the canonical ratio observed in oceanic lavas, and Cl/K ratios (0.079 6 0.028) fall in the range of pristine mantle (0.02-0.08).

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The systematics of chlorine, fluorine, and water in Izu arc front volcanic rocks: Implications for volatile recycling in subduction zones

Cited by 234 publications

References 88 publications

H2O-rich island arc low-K tholeiite magma inferred from Ca-rich plagioclase-melt inclusion equilibria

H2O-rich island arc low-K tholeiite magma inferred from Ca-rich plagioclase-melt inclusion equilibria

Large volume submarine ignimbrites in the Shikoku Basin: An example for explosive volcanism in the Western Pacific during the Late Miocene

Volatile cycling of H₂O, CO₂, F, and Cl in the HIMU mantle: A new window provided by melt inclusions from oceanic hot spot lavas at Mangaia, Cook Islands

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The systematics of chlorine, fluorine, and water in Izu arc front volcanic rocks: Implications for volatile recycling in subduction zones

Cited by 234 publications

References 88 publications

H2O-rich island arc low-K tholeiite magma inferred from Ca-rich plagioclase-melt inclusion equilibria

H2O-rich island arc low-K tholeiite magma inferred from Ca-rich plagioclase-melt inclusion equilibria

Large volume submarine ignimbrites in the Shikoku Basin: An example for explosive volcanism in the Western Pacific during the Late Miocene

Volatile cycling of H2O, CO2, F, and Cl in the HIMU mantle: A new window provided by melt inclusions from oceanic hot spot lavas at Mangaia, Cook Islands

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Volatile cycling of H₂O, CO₂, F, and Cl in the HIMU mantle: A new window provided by melt inclusions from oceanic hot spot lavas at Mangaia, Cook Islands