Spectroscopic analysis (FTIR, Raman) of water in mafic and intermediate glasses and glass inclusions

Mercier, Maxime; Muro, Andréa Di; Métrich, Nicole; Giordano, Daniele; Belhadj, O.; Mandeville, Charles W.

doi:10.1016/j.gca.2010.06.020

Cited by 71 publications

(78 citation statements)

References 58 publications

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“…To determine H 2 O contents, one doubly polished experimentally homogenized inclusion (H7XC1) and four doubly polished natural inclusion samples were measured using Fourier transform infrared spectroscopy ( Figure S2 and Table 1). Based on the intensity of the absorbance at 3,550 cm −1 , a molar absorptivity of 63.8 L · mol −1 · cm −1 (Mercier et al, 2010), and an approximate glass density of 2.7 g cm 3 , the natural glassy olivine-hosted melt inclusions from Papakolea contain 0.10-0.27 wt % H 2 O (n = 4; 2-3 measurements per inclusion, 2σ = 0.02-0.04 wt %), within the range of published values for unheated Mauna Loa olivinehosted melt inclusions (Hauri, 2002;Sobolev et al, 2000;Wallace et al, 2015). The single experimentally homogenized inclusion H7XC1 we measured has a water content of 383-388 ppm, suggesting that the inclusion lost most of its water during the isothermal homogenization step.…”

Section: Methodsmentioning

confidence: 99%

Controlled Cooling‐Rate Experiments on Olivine‐Hosted Melt Inclusions: Chemical Diffusion and Quantification of Eruptive Cooling Rates on Hawaii and Mars

Saper

Stolper

2020

Geochem Geophys Geosyst

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Controlled cooling‐rate experiments were conducted on olivine‐hosted melt inclusions to characterize the development of compositional zoning observed in natural inclusions. All of the experimentally cooled inclusions are zoned due to olivine crystallization on the inclusion wall and diffusive exchange between the boundary layer adjacent to the growing olivine and the inclusion centers. Experimentally cooled inclusions are characterized by lower MgO and FeO and higher SiO2, Al2O3, and Na2O (and other incompatible oxides) near the inclusion wall relative to the inclusion center. The compositions at the centers of inclusions are susceptible to modification by diffusion, particularly for small inclusions and those subjected to low cooling rates. Uphill diffusion is evident in every oxide and is recognized by local extrema along a diffusion profile. CaO exhibits the most extreme manifestation of uphill diffusion, and a model attributes the diffusion behavior in CaO to solution nonideality in the boundary layer liquid. MgO profiles from experimentally cooled inclusions were fit with a diffusion model by varying the cooling rate. The cooling rates that resulted in the best fit models were always within a factor of 2 and typically within ±10% of the experimental cooling rates, which ranged from 70 to 50,000 °C/hr. The model was applied to MgO profiles across natural glassy olivine‐hosted melt inclusions from Hawaii and the shergottite Yamato 980459. Cooling rates from zoned melt inclusions in Yamato 980459 range from 85 to 1,047 °C/hr (mean = 383±43 °C/hr, 1σ, n=8) and support the hypothesis that the sample erupted at or near the Martian surface.

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Section: Methodsmentioning

confidence: 99%

Controlled Cooling‐Rate Experiments on Olivine‐Hosted Melt Inclusions: Chemical Diffusion and Quantification of Eruptive Cooling Rates on Hawaii and Mars

Saper

Stolper

2020

Geochem Geophys Geosyst

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“…We used H 2 O (62.8 ± 0.8 L mol -1 cm -1 ) and CO 2 (375 ± 20 L mol -1 cm -1 ) absorption coefficients from Mercier et al (2010) and Fine and Stolper (1985), respectively. Glass density of FZ basalt was calculated using the model by Lange and Carmichael (1987), whereas the density of SOM basalt is from Mercier et al (2010). Uncertainties in H 2 O and CO 2 concentrations were estimated to be $20% mostly due to uncertainties in sample thickness.…”

Section: Analytical Techniquesmentioning

confidence: 99%

P–V–T–X evolution of olivine-hosted melt inclusions during high-temperature homogenization treatment

Schiavi

Provost

Schiano

et al. 2016

Geochimica et Cosmochimica Acta

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“…Starting material bulk water contents were quantified from the peak height of the OH stretching vibration band at 3550 cm −1 (Fig. 2) after subtracting a linear base line following the method of Mercier et al (2010) and using their FTIR absorptivity coefficient for basalt glass. Densities of basaltic glasses could not be determined directly due to the small sample volume but were estimated to 2.6 ± 0.2 g/cm 3 (e.g., Mercier et al 2010).…”

Section: Fourier Transformation Infrared Spectroscopy (Ftir)mentioning

confidence: 99%

Fluorine partitioning between eclogitic garnet, clinopyroxene, and melt at upper mantle conditions

et al. 2016

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partition coefficients between olivine and melt at least in the simplified iron-free CMAS+F-Cl-Br-I-H 2 O system. In contrast, the fluorine partition coefficient increases linearly in this range and may be described at 1280 °C and 0.3 GPa with (R 2 = 0.99):The observed fluorine partitioning behavior supports the theory suggested by Crépisson et al. (Earth Planet Sci Lett 390:287-295, 2014) that fluorine and water are incorporated as clumped OH/F defects in the olivine structure. Results of this study further suggest that fluorine concentration estimates in OIB source regions are at least 10% lower than previously expected (Joachim et al. Chem Geol 416:65-78, 2015), implying that consideration of the effect of water on the fluorine partitioning behavior between Earth's mantle minerals and silicate melt is vital for a correct estimation of fluorine abundances in OIB source regions. Estimates for MORB source fluorine concentrations as well as chlorine abundances in both mantle source regions are within uncertainty not affected by the presence of water.Keywords Fluorine · Chlorine · Halogen · Partitioning · Water · H2O · Earth's mantle · Mid Ocean Ridge Basalt (MORB) · Ocean Island Basalt (OIB) · Olivine · Forsterite · SIMS Abstract Halogens show a range from moderate (F) to highly (Cl, Br, I) volatile and incompatible behavior, which makes them excellent tracers for volatile transport processes in the Earth's mantle. Experimentally determined fluorine and chlorine partitioning data between mantle minerals and silicate melt enable us to estimate Mid Ocean Ridge Basalt (MORB) and Ocean Island Basalt (OIB) source region concentrations for these elements. This study investigates the effect of varying small amounts of water on the fluorine and chlorine partitioning behavior at 1280 °C and 0.3 GPa between olivine and silicate melt in the Fe-free CMAS+F-Cl-Br-I-H 2 O model system. Results show that, within the uncertainty of the analyses, water has no effect on the chlorine partitioning behavior for bulk water contents ranging from 0.03 (2) wt% H 2 O (D Cl ol/melt = 1.6 ± 0.9 × 10 −4 ) to 0.33 (6) wt% H 2 O (D Cl ol/melt = 2.2 ± 1.1 × 10 −4 ). Consequently, with the effect of pressure being negligible in the uppermost mantle (Joachim et al. Chem Geol 416:65-78, 2015), temperature is the only parameter that needs to be considered for the determination of chlorine Communicated by

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Spectroscopic analysis (FTIR, Raman) of water in mafic and intermediate glasses and glass inclusions

Cited by 71 publications

References 58 publications

Controlled Cooling‐Rate Experiments on Olivine‐Hosted Melt Inclusions: Chemical Diffusion and Quantification of Eruptive Cooling Rates on Hawaii and Mars

Controlled Cooling‐Rate Experiments on Olivine‐Hosted Melt Inclusions: Chemical Diffusion and Quantification of Eruptive Cooling Rates on Hawaii and Mars

P–V–T–X evolution of olivine-hosted melt inclusions during high-temperature homogenization treatment

Fluorine partitioning between eclogitic garnet, clinopyroxene, and melt at upper mantle conditions

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