The Role of Halogens in the Lithospheric Mantle

Frezzotti, Maria Luce; Ferrando, Simona

doi:10.1007/978-3-319-61667-4_13

Cited by 11 publications

(12 citation statements)

References 203 publications

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“…The dunite is mainly composed of olivine. Hydrous minerals such as amphibole and phlogopite, which can be major reservoir for halogens in the lithospheric mantle (Frezzotti & Ferrando, ; Klemme & Stalder, ), were not found. Alteration products such as serpentine minerals and clays are also absent.…”

Section: Samplesmentioning

confidence: 99%

“…Halogens and noble gases show highly contrasting concentrations between the surface and interior of the Earth, making them exceptionally sensitive indicators of subducted volatiles (e.g., Frezzotti & Ferrando, ; Hanley & Koga, ; Holland & Ballentine, ; Kendrick et al, ; Klemme & Stalder, ; Ozima & Podosek, ). Furthermore, these groups of elements show distinct elemental and/or isotopic compositions in different reservoirs, which can be used to reveal the origin and/or subduction path of volatiles (e.g., Broadley et al, ; Chavrit et al, ; Holland & Ballentine, ; John et al, ; Kendrick et al, , , ; Kendrick, Arculus, et al, ; Kendrick, Honda, et al, , ; Kendrick, Jackson, et al, , ; Kobayashi et al, ; Ozima & Podosek, ; Schilling et al, ; Sumino et al, ).…”

Section: Introductionmentioning

confidence: 99%

“…The halogen compositions of the lithospheric mantle, especially Br and I, are also not well constrained. In the lithospheric mantle, halogens are thought to be mainly stored in hydrous minerals formed by metasomatic processes such as amphibole, apatite, and phlogopite (Frezzotti & Ferrando, ; Klemme & Stalder, ). Recent studies have emphasized the importance of nominally anhydrous minerals as repositories for halogens in the lithospheric mantle (Frezzotti & Ferrando, ; Klemme & Stalder, ).…”

Section: Introductionmentioning

confidence: 99%

“…In the lithospheric mantle, halogens are thought to be mainly stored in hydrous minerals formed by metasomatic processes such as amphibole, apatite, and phlogopite (Frezzotti & Ferrando, ; Klemme & Stalder, ). Recent studies have emphasized the importance of nominally anhydrous minerals as repositories for halogens in the lithospheric mantle (Frezzotti & Ferrando, ; Klemme & Stalder, ). However, because few analytical techniques can quantify trace amounts of halogens in mantle‐derived materials, especially parts per billion or subparts per billion levels of Br and I, little is known about their abundance, behavior, and distribution including the extent of heterogeneity in the lithospheric mantle.…”

Section: Introductionmentioning

confidence: 99%

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Halogen Heterogeneity in the Lithosphere and Evolution of Mantle Halogen Abundances Inferred From Intraplate Mantle Xenoliths

Kobayashi

Sumino

Burgess

et al. 2019

Geochem Geophys Geosyst

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We present halogen, noble gas, and major and trace element compositions of mantle xenoliths from intraplate settings (Eifel, Kilbourne Hole, San Carlos, and Hawaii). The xenoliths show a wide range of halogen elemental ratios, which form two arrays centered on the halogen composition of mid-ocean ridge basalts. The samples on the array toward high I/Cl value have relatively low Cl concentration and low ratios of highly incompatible elements relative to heavy rare earth elements, whereas the samples on the array toward low Br/Cl value have higher Cl concentration and trace elements ratios. The detailed mechanisms to account for these signatures are equivocal at present. However, they are most likely to be related to secondary processes of volatile loss during partial melting and secondary phase formation during interaction with melts. The common primary mid-ocean ridge basalt-like halogen ratios in mantle xenoliths from different parts of the globe indicate that the mantle itself must have a relatively uniform composition over a wide scale. The mantle has maintained its halogen composition over billion year timescales without being affected by I-rich halogens being transported into the mantle. Mass balance calculations suggest that, in order to maintain the I/Cl ratio of the convecting mantle over 2 Gyr, the I/Cl ratio of the subducted halogens must be no more than several times higher than the present-day mantle value. Plain Language Summary Elemental and isotopic compositions of volatile species such ashalogens, noble gases, hydrogen, and carbon can be used to trace the evolution of these species in the Earth. Halogens are important tracers of subduction recycling of surface volatiles into the mantle: however, there is only limited understanding of halogens in the mantle. Here we provide new halogen data of mantle xenoliths from intraplate settings. The mantle xenoliths show a wide range of halogen elemental ratios, which are expected to be related to later processes after the xenoliths formed. A similar primary halogen component is present in the xenoliths sampled from different localities. This suggests that the mantle has the uniform halogen composition over a wide scale. The halogen composition in the convecting mantle is expected to have remained constant over more than 2 billion years, despite subduction of iodine-rich halogens. We used mass balance calculations to gain understanding into evolution rate of I/Cl ratio in the mantle. Calculations suggest that, in order to maintain the I/Cl ratio of the mantle over 2 Gyr, the I/Cl ratio of the subducted halogens must be no more than several times higher than the present-day mantle value.

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Section: Samplesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Halogen Heterogeneity in the Lithosphere and Evolution of Mantle Halogen Abundances Inferred From Intraplate Mantle Xenoliths

Kobayashi

Sumino

Burgess

et al. 2019

Geochem Geophys Geosyst

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“…Доказательством тому, что водно-(углекисло)-солевые флюиды активны в процессах преобразования мантии на глубинах 30-80 км, являются находки галогенсодержащих апатитов, амфиболов и слюд, а также водно-солевых включений в минералах нодулей шпинелевых перидотитов в базальтах различных геотектонических обстановок и тектонически выведенных на поверхность перидотитовых массивов (см. обзоры в работе Frezzotti, Touret, 2014;Frezzotti, Ferrando, 2018). Эти флюиды, по-видимому, являются продуктами реакций более глубинных карбонатитовых и карбонатно-солевых жидкостей с силикатами в мантии по мере подъема к поверхности (Сафонов, 2011).…”

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Mineral indicators of reactions involving fluid salt components in the deep lithosphere

et al. 2019

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The salt components of H2O and H2O–CO2 fluids are very important agents of metasomatism and partial melting of crustal and mantle rocks. The paper presents examples and synthesized data on mineral associations in granulite- and amphibolite-facies rocks of various composition in the middle and lower crust and in upper-mantle eclogites and peridotites that provide evidence of reactions involving salt components of fluids. These data are analyzed together with results of model experiments that reproduce some of these associations and make it possible to more accurately determine their crystallization parameters.

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CO₂‐bearing fluid inclusions associated with diamonds in zircon from the UHP Kokchetav gneisses

Mikhno

Musiyachenko

Shchepetova

et al. 2017

J Raman Spectroscopy

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CO2‐bearing fluid inclusions coexisting with diamonds were identified in zircons from diamondiferous gneiss in the Kokchetav Massif. This discovery provides evidence for the presence of CO2 in UHP fluids and diamond formation in moderately oxidized conditions in the Kokchetav gneiss. Fluid and multiphase solid inclusions coexisting in zircons represent immiscible melt and fluid captured close to the peak metamorphic conditions for the Kokchetav UHP gneiss. Most of CO2‐bearing inclusions are CO2+H2O mixtures except for some cases when they also contain daughter phases (e.g. muscovite, calcite and quartz) tracing the presence of aqueous and solute‐rich fluids at different phases of UHP metamorphism. Decrease of pressure and temperature may have been responsible for the reduction of solutes in the CO2‐bearing fluid. The lack of CO2‐bearing inclusions in garnet porphyroblasts from diamond‐bearing gneiss, as well as the common coexistence of aqueous CO2‐bearing inclusions with calcite, testify that most likely all CO2 in fluid was consumed by the calcite‐forming reaction and hydrous melt was the only remaining growth medium during retrograde metamorphism of the Kokchetav UHPM gneisses. Neither K‐cymrite nor kokchetavite was identified among daughter phases in the hydrous melt inclusions in garnet, which indicates that they hardly could originate in a metapelitic system. Copyright © 2017 John Wiley & Sons, Ltd.

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The Role of Halogens in the Lithospheric Mantle

Cited by 11 publications

References 203 publications

Halogen Heterogeneity in the Lithosphere and Evolution of Mantle Halogen Abundances Inferred From Intraplate Mantle Xenoliths

Halogen Heterogeneity in the Lithosphere and Evolution of Mantle Halogen Abundances Inferred From Intraplate Mantle Xenoliths

Mineral indicators of reactions involving fluid salt components in the deep lithosphere

CO₂‐bearing fluid inclusions associated with diamonds in zircon from the UHP Kokchetav gneisses

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The Role of Halogens in the Lithospheric Mantle

Cited by 11 publications

References 203 publications

Halogen Heterogeneity in the Lithosphere and Evolution of Mantle Halogen Abundances Inferred From Intraplate Mantle Xenoliths

Halogen Heterogeneity in the Lithosphere and Evolution of Mantle Halogen Abundances Inferred From Intraplate Mantle Xenoliths

Mineral indicators of reactions involving fluid salt components in the deep lithosphere

CO2‐bearing fluid inclusions associated with diamonds in zircon from the UHP Kokchetav gneisses

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Product

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CO₂‐bearing fluid inclusions associated with diamonds in zircon from the UHP Kokchetav gneisses