The distribution of H2O between silicate melt and nominally anhydrous peridotite and the onset of hydrous melting in the deep upper mantle

Novella, Davide; Frost, Daniel J.; Hauri, E. H.; Bureau, Hélène; Raepsaet, Caroline; Roberge, Mathilde

doi:10.1016/j.epsl.2014.05.006

Cited by 88 publications

(84 citation statements)

References 85 publications

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“…The olivine H 2 O contents measured here are an effective maximum for the mantle olivine at the time of diamond growth. By using the olivine/melt partition coefficient of Novella et al (2014) it can be estimated that the melt that equilibrated both with the olivines and diamonds investigated here, contained an average of 0.09 wt% H 2 O. This value is similar to those measured on melt inclusions in octahedral diamonds from Africa (0.01-0.06…”

Section: Accepted Manuscriptsupporting

confidence: 61%

“…This absorption was A C C E P T E D M A N U S C R I P T where kimberlites are believed to form (e.g. Novella et al, 2014). Arguments about subsequent diffusion of hydrogen are not supported by the evidence.…”

Section: Resultsmentioning

confidence: 86%

“…11 wt% H 2 O) as reported by Navon et al (1988), and has to be taken as a maximum since the partition coefficients of Novella et al (2014) were determined in a hydrous system. If CO 2 is also considered in the system, then the H 2 O content of olivine in equilibrium with a melt would considerably drop (e.g.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

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H2O in olivine and garnet inclusions still trapped in diamonds from the Siberian craton: Implications for the water content of cratonic lithosphere peridotites

Novella

Bolfan-Casanova

Nestola

et al. 2015

Lithos

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Section: Accepted Manuscriptsupporting

confidence: 61%

Section: Resultsmentioning

confidence: 86%

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H2O in olivine and garnet inclusions still trapped in diamonds from the Siberian craton: Implications for the water content of cratonic lithosphere peridotites

Novella

Bolfan-Casanova

Nestola

et al. 2015

Lithos

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“…According to Fan et al (), and considering that the TiO 2 garnet concentrations in these three samples were less than 0.23 wt %, the D garnet/melt of H 2 O can be assumed to be <0.001 (Aubaud et al, ). Following the equation of Novella et al (), the D cpx/melt of H 2 O can be approximated as 0.017, due to the narrow Al 2 O 3 content in cpx. These considerations lead to a D cpx/garnet of H 2 O of ~17 and a consequently calculated garnet H 2 O concentration of approximately 5 ppm (Table ).…”

Section: Resultsmentioning

confidence: 99%

“…The other two garnet pyroxenites show identical cpx H 2 O contents and similar H 2 O/Ce ratios, while the cpx Mg# changes from 90.8 to 92. Following the equation of Novella et al (), the estimated D cpx/melt of H 2 O ranges from 0.011 to 0.019, with an average of 0.017 ± 0.002 (Table ). The experimental studies suggest that the D cpx/melt of Ce is ~0.09 (Hart & Dunn, ; Hauri & Hart, ); thus, both H 2 O and Ce are highly incompatible during melting and crystallization.…”

Section: Discussionmentioning

confidence: 99%

Variations in the H₂O Content and H₂O/Ce Ratio of Mantle Pyroxenites: Implications for Enriched Components in the Mantle

Hao

Coltorti

et al. 2018

JGR Solid Earth

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Mantle pyroxenite xenoliths were collected from Hannuoba, East China, and investigated for their H2O content and trace element contents, with particular regard to the H2O/Ce ratio. The pyroxenites were divided into three groups: Cr‐pyroxenites, Al‐pyroxenites, and garnet pyroxenites. The H2O contents and H2O/Ce ratios of the pyroxenites in this study showed much wider ranges than those previously reported for the whole rock pyroxenites. The Cr‐pyroxenites had an H2O content ranging from 23 to 339 ppm and an H2O/Ce ratio between 32 and 212; the Al‐pyroxenites had an H2O content ranging from 42 to 106 ppm and an H2O/Ce ratio between 1 and 22, and the garnet pyroxenites had an H2O content ranging from 37 to 69 ppm and an H2O/Ce ratio between 5 and 54. These systematic variations in the H2O contents and H2O/Ce ratios for the Hannuoba pyroxenites are associated with their origins. Both the H2O content and H2O/Ce ratio of the Al‐pyroxenites were low compared to those of Hawaiian pyroxenite, enriched mantle, and depleted MORB mantle sources. The high H2O content and H2O/Ce ratio of the melt equilibrated with the Cr‐pyroxenites indicate that a water‐rich component was involved in its formation. Their large variations in the H2O contents and H2O/Ce ratios may indicate that pyroxenites are essential enriched components in the sources of continental basalts.

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Plume‐cratonic lithosphere interaction recorded by water and other trace elements in peridotite xenoliths from the Labait volcano, Tanzania

Huang

Peslier

Rudnick

et al. 2015

Geochem Geophys Geosyst

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Water and other trace element concentrations in olivine (1-39 ppm H 2 O), orthopyroxene (10-150 ppm H 2 O), and clinopyroxene (16-340 ppm H 2 O) of mantle xenoliths from the Labait volcano, located on the edge of the Tanzanian craton along the eastern branch of the East African Rift, record melting and subsequent refertilization by plume magmas in a stratified lithosphere. These water contents are at the lower end of the range observed in other cratonic mantle lithospheres. Despite correlations between water content and indices of melting in orthopyroxene from the shallow peridotites, and in both olivine and orthopyroxene from the deep peridotites, water concentrations are too high for the peridotites to be simple residues. Instead, the Labait water contents are best explained as reflecting interaction between residual peridotite with a melt having relatively low water content (<1 wt.% H 2 O). Plume-derived melts are the likely source of water and other trace element enrichments in the Labait peridotites. Only garnet may have undergone addition of water from the host magma as evidenced by water content increasing toward the kelyphite rim in one otherwise homogeneous garnet. Based on modeling of the diffusion profile, magma ascent occurred at 4-28 m/s. In summary, plume-craton interaction appears to result in only moderate water enrichment of the lithosphere.

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The distribution of H2O between silicate melt and nominally anhydrous peridotite and the onset of hydrous melting in the deep upper mantle

Cited by 88 publications

References 85 publications

H2O in olivine and garnet inclusions still trapped in diamonds from the Siberian craton: Implications for the water content of cratonic lithosphere peridotites

H2O in olivine and garnet inclusions still trapped in diamonds from the Siberian craton: Implications for the water content of cratonic lithosphere peridotites

Variations in the H₂O Content and H₂O/Ce Ratio of Mantle Pyroxenites: Implications for Enriched Components in the Mantle

Plume‐cratonic lithosphere interaction recorded by water and other trace elements in peridotite xenoliths from the Labait volcano, Tanzania

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The distribution of H2O between silicate melt and nominally anhydrous peridotite and the onset of hydrous melting in the deep upper mantle

Cited by 88 publications

References 85 publications

H2O in olivine and garnet inclusions still trapped in diamonds from the Siberian craton: Implications for the water content of cratonic lithosphere peridotites

H2O in olivine and garnet inclusions still trapped in diamonds from the Siberian craton: Implications for the water content of cratonic lithosphere peridotites

Variations in the H2O Content and H2O/Ce Ratio of Mantle Pyroxenites: Implications for Enriched Components in the Mantle

Plume‐cratonic lithosphere interaction recorded by water and other trace elements in peridotite xenoliths from the Labait volcano, Tanzania

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Variations in the H₂O Content and H₂O/Ce Ratio of Mantle Pyroxenites: Implications for Enriched Components in the Mantle