Oxygen Isotopes in Mantle and Crustal Magmas as Revealed by Single Crystal Analysis

Bindeman, Ilya N.

doi:10.2138/rmg.2008.69.12

Cited by 427 publications

(261 citation statements)

References 137 publications

(200 reference statements)

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“…Using modal mineral proportions calculated from MELTS (Ghiorso and Sack, 1995) and oxygen isotope fractionation factors from Bindeman (2008), we calculated the change in δ 18 O during fractional Dixon et al (1995a, b). Black dashed lines show a general magma degassing trends during ascent.…”

Section: Evidence For Assimilation From Oxygen Isotopesmentioning

confidence: 99%

Volatile abundances and oxygen isotopes in basaltic to dacitic lavas on mid-ocean ridges: The role of assimilation at spreading centers

et al. 2011

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a b s t r a c t a r t i c l e i n f oMost geochemical variability in MOR basalts is consistent with low-to moderate-pressure fractional crystallization of various mantle-derived parental melts. However, our geochemical data from MOR highsilica glasses, including new volatile and oxygen isotope data, suggest that assimilation of altered crustal material plays a significant role in the petrogenesis of dacites and may be important in the formation of basaltic lavas at MOR in general. MOR high-silica andesites and dacites from diverse areas show remarkably similar major element trends, incompatible trace element enrichments, and isotopic signatures suggesting similar processes control their chemistry. In particular, very high Cl and elevated H 2 O concentrations and relatively light oxygen isotope ratios (~5.8‰ vs. expected values of~6.8‰) in fresh dacite glasses can be explained by contamination of magmas from a component of ocean crust altered by hydrothermal fluids. Crystallization of silicate phases and Fe-oxides causes an increase in δ 18 O in residual magma, but assimilation of material initially altered at high temperatures results in lower δ 18 O values. The observed geochemical signatures can be explained by extreme fractional crystallization of a MOR basalt parent combined with partial melting and assimilation (AFC) of amphibole-bearing altered oceanic crust. The MOR dacitic lavas do not appear to be simply the extrusive equivalent of oceanic plagiogranites. The combination of partial melting and assimilation produces a distinct geochemical signature that includes higher incompatible trace element abundances and distinct trace element ratios relative to those observed in plagiogranites.

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Section: Evidence For Assimilation From Oxygen Isotopesmentioning

confidence: 99%

Volatile abundances and oxygen isotopes in basaltic to dacitic lavas on mid-ocean ridges: The role of assimilation at spreading centers

et al. 2011

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“…2) that range from − 37.5 to − 31.1‰ for deuterium, respectively, and 6.0‰ for oxygen (Fig. 11), and indicates (i) a negligible δ O fractionation that is typical for such high T magmas (see also Bindeman 2008), as well as (ii) an increasing influence of non magmatic waters (oceanic, ice) as revealed by the shift toward heavier-SMOW-deuterium values.…”

Section: Figmentioning

confidence: 94%

Historic hydrovolcanism at Deception Island (Antarctica): implications for eruption hazards

et al. 2017

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Deception Island (Antarctica) is the southernmost island of the South Shetland Archipelago in the South Atlantic. Volcanic activity since the eighteenth century, along with the latest volcanic unrest episodes in the twentieth and twenty first centuries, demonstrates that the volcanic system is still active and that future eruptions are likely. Despite its remote location, the South Shetland Islands are an important touristic destination during the austral summer. In addition, they host several research stations and three summer field camps. Deception Island is characterised by a Quaternary caldera system with a post caldera succession and is considered to be part of an active, dispersed (monogenetic), volcanic field. Historical post caldera volcanism on Deception Island involves monogenetic small volume (VEI 2-3) eruptions such forming cones and various types of hydrovolcanic edifices. The scientific stations on the island were destroyed, or severely damaged, during the eruptions in 1967, 1969, and 1970 mainly due to explosive activity triggered by the interaction of rising (or erupting) magma with surface water, shallow groundwater, and ice. We conducted a detailed revision (field petrology and geochemistry) of the historical hydrovolcanic post caldera eruptions of Deception Island with the aim to understand the dynamics of magma water interaction, as well as characterise the most likely eruptive scenarios from future eruptions. We specifically focused on the Crimson Hill (estimated age between 1825 and 1829), and Kroner Lake (estimated age between 1829 and 1912) eruptions and 1967, 1969, and 1970 events by describing the eruption mechanisms related to the island's hydrovolcanic activity. Data suggest that the main hazards posed by volcanism on the island are due to fallout, ballistic blocks and bombs, and subordinate, dilute PDCs. In addition, Deception Island can be divided into five areas of expected activity due to magma water interaction, providing additional data for correct hazard assessment on the island.

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“…The O isotope of Haiyang complex zircons is slightly but systematically higher than those of the mantle, but far lower than sediments, indicating their source involved mantle source and slab melt, with minor sediment source (Bindeman, 2008;Li et al, 2009;Valley et al, 1998). The oxygen isotopes of Kfeldspar granites have a frequency distribution peak higher than the syenite, closer to the mantle value, representing less metasomatism (Bindeman, 2008;Liu et al, 2014;Valley et al, 1998) (Fig.…”

Section: Origin Of the Haiyang A-type Granite Complexmentioning

confidence: 95%

The geochemical characteristics of Haiyang A-type granite complex in Shandong, eastern China

He¹,

Ling²,

Ding³

et al. 2014

Lithos

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Oxygen Isotopes in Mantle and Crustal Magmas as Revealed by Single Crystal Analysis

Cited by 427 publications

References 137 publications

Volatile abundances and oxygen isotopes in basaltic to dacitic lavas on mid-ocean ridges: The role of assimilation at spreading centers

Volatile abundances and oxygen isotopes in basaltic to dacitic lavas on mid-ocean ridges: The role of assimilation at spreading centers

Historic hydrovolcanism at Deception Island (Antarctica): implications for eruption hazards

The geochemical characteristics of Haiyang A-type granite complex in Shandong, eastern China

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