Thermal expansion of wadsleyite, ringwoodite, hydrous wadsleyite and hydrous ringwoodite

Inoue, Toru; Tanimoto, Yasuchika; Irifune, Tetsuo; Suzuki, Taku; Fukui, Hiroshi; Ohtaka, Osamu

doi:10.1016/j.pepi.2003.07.021

Cited by 91 publications

(74 citation statements)

References 28 publications

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“…For the thermal expansivities of anhydrous wadsleyite and ringwoodite, the measurements from Ye et al (2009) are in good agreement with those from Suzuki et al (1979Suzuki et al ( , 1980 and Trots et al (2012). The results from Inoue et al (2004) are quite different from the others, and then not shown in Figure 8. Linear relationship between  0 and the density at high temperature is also observed for anhydrous Mg 2 SiO 4 polymorphs (the dotted line in Figure 8).…”

Section: Thermal Expansivity () At High Temperaturesupporting

confidence: 59%

“…We never raise the temperature above 900 K, because the single crystals broke up easily above 900 K at the ambient pressure. Besides, Pawley et al (1995) and Inoue et al (2004) also reported the thermal expansivities of phase A, and hydrous Mg 2 SiO 4 polymorphs, individually, by powder XRD. Suzuki et al (1979Suzuki et al ( , 1980, Inoue et al (2004) and Trots et al (2012) also conducted some high-T measurements on anhydrous ,  and  polymorphs of Mg 2 SiO 4 .…”

Section: Thermal Expansivity () At High Temperaturementioning

confidence: 97%

“…Mao et al, 2008). It should also be noted that Inoue et al (2004) proposed that hydration decreased the thermal expansivity for wadsleyite and ringwoodite, instead, by powder XRD.…”

Section: Thermal Expansivity () At High Temperaturementioning

confidence: 99%

“…On the other hand, some studies have been conducted for the P-V-T EoS of anhydrous forsterite, wadsleyite, and ringwoodite (Meng et al, 1993(Meng et al, , 1994Guyot et al, 1996;Li et al, 2001;Katsura et al, 2004Katsura et al, , 2009aKatsura et al, , 2009bCouvy et al, 2010). Some high-temperature measurements (at ambient pressure) have also been carried out for these DHMS and hydrous NAMs phases (Pawley et al, 1995: Inoue et al, 2004Ye et al, 2009Ye et al, , 2011Ye et al, , 2012Ye et al, , 2013Ye et al, , 2015, which are useful for establishing simultaneous P-V-T EoSs of these hydrous silicate minerals in the future. We will discuss the high-pressure and high-temperature experiments for EoSs in this section.…”

Section: Equations Of Statementioning

confidence: 99%

“…Due to the bulk volume of the mantle and the significant water solubilities of the minerals in the mantle, the potential water storage deep inside the Earth may be far larger than that on the surface (Smyth, 1987(Smyth, , 1994Smyth et al, 2003Smyth et al, , 2004Smyth and Jacobsen, 2006;Williams and Hemley, 2001;Ohtani et al, 2001;Ohtani, 2005;Inoue et al, 2004;Bolfan-Casanova, 2005;Hirschmann and Kohlstedt, 2012). There are several forms for water existing in the mantle: (1) molecules in a fluid, while molecules or hydroxyl (OH  ) in the melt, which could be converted to each other (i.e.…”

Section: Introductionmentioning

confidence: 99%

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Hydration effects on crystal structures and equations of state for silicate minerals in the subducting slabs and mantle transition zone

2016

Sci. China Earth Sci.

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There are potentially huge amounts of water stored in Earth's mantle, and the water solubilities in the silicate minerals range from tens to thousands of part per minion (ppm, part per million). Exploring water in the mantle has attracted much attention from the societies of mineralogy and geophysics in recent years. In the subducting slab, serpentine breaks down at high temperature, generating a series of dense hydrous magnesium silicate (DHMS) phases, such as phase A, chondrodite, clinohumite, etc. These phases may serve as carriers of water as hydroxyl into the upper mantle and the mantle transition zone (MTZ). On the other hand, wadsleyite and ringwoodite, polymorphs of olivine, are most the abundant minerals in the MTZ, and able to absorb significant amount of water (up to about 3 wt.% H 2 O). Hence, the MTZ becomes a very important layer for water storage in the mantle, and hydration plays important roles in physics and chemistry of the MTZ. In this paper, we will discuss two aspects of hydrous silicate minerals: (1) crystal structures and (2) equations of state (EoSs). Keywords Hydrous silicate mineral, Crystal structure, Equation of state (EoS), Mantle transition zone (MTZ), Wadsleyite, Ringwoodite Citation: Ye Y. 2016. Hydration effects on crystal structures and equations of state for silicate minerals in the subducting slabs and mantle transition zone.

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Section: Thermal Expansivity () At High Temperaturesupporting

confidence: 59%

Section: Thermal Expansivity () At High Temperaturementioning

confidence: 97%

“…Mao et al, 2008). It should also be noted that Inoue et al (2004) proposed that hydration decreased the thermal expansivity for wadsleyite and ringwoodite, instead, by powder XRD.…”

Section: Thermal Expansivity () At High Temperaturementioning

confidence: 99%

Section: Equations Of Statementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Hydration effects on crystal structures and equations of state for silicate minerals in the subducting slabs and mantle transition zone

2016

Sci. China Earth Sci.

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Intraplate volcanism due to convective instability of stagnant slabs in the mantle transition zone

Motoki

Ballmer

2015

Geochem Geophys Geosyst

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The study of volcanism can further our understanding of Earth's mantle processes and composition. Continental intraplate volcanism commonly occurs above subducted slabs that stagnate in the Mantle Transition Zone (MTZ), such as in Europe, eastern China, and western North America. Here, we use twodimensional numerical models to explore the evolution of stagnant slabs in the MTZ and their potential to sustain mantle upwellings that can support volcanism. We find that weak slabs may go convectively unstable within tens of million years. Upwellings rise out of the relatively warm underbelly of the slab, are entrained by ambient-mantle flow and reach the base of the lithosphere. The first and most vigorous upwellings rise adjacent to lateral heterogeneity within the slab. Ultimately, convective instability also acts to separate the compositional components of the slab, harzburgite, and eclogite, from each other with harzburgite rising into the upper mantle and eclogite sinking into the lower mantle. Such a physical filtering process may sustain a long-term compositional gradient across the MTZ.

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Comparative compressibility of hydrous wadsleyite and ringwoodite: Effect of H₂O and implications for detecting water in the transition zone

et al. 2015

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Review of recent mineral physics literature shows consistent trends for the influence of Fe and H2O on the bulk modulus (K0) of wadsleyite and ringwoodite, the major phases of Earth's mantle transition zone (410–660 km). However, there is little consensus on the first pressure derivative, K0′ = (dK/dP)P=0, which ranges from about 4 to >5 across experimental studies and compositions. Here we demonstrate the importance of K0′ in evaluating the bulk sound velocity of the transition zone in terms of water content and provide new constraints on the effect of H2O on K0′ for wadsleyite and ringwoodite by conducting a comparative compressibility study. In the experiment, multiple crystals of hydrous Fo90 wadsleyite containing 2.0 and 0.25 wt % H2O were loaded into the same diamond anvil cell, along with hydrous ringwoodite containing 1.4 wt % H2O. By measuring their pressure‐volume evolution simultaneously up to 32 GPa, we constrain the difference in K0′ independent of the pressure scale, finding that H2O has no effect on K0′, whereas the effect of H2O on K0 is significant. The fitted K0′ values of hydrous wadsleyite (0.25 and 2.0 wt % H2O) and hydrous ringwoodite (1.4 wt % H2O) examined in this study were found to be identical within uncertainty, with K0′ ~3.7(2). New secondary‐ion mass spectrometry measurements of the H2O content of these and previously investigated wadsleyite samples shows the bulk modulus of wadsleyite is reduced by 7.0(5) GPa/wt % H2O, independent of Fe content for upper mantle compositions. Because K0′ is unaffected by H2O, the reduction of bulk sound velocity in very hydrous regions of transition zone is expected to be on the order of 1.6%, which is potentially detectible in high‐resolution, regional seismology studies.

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Thermal expansion of wadsleyite, ringwoodite, hydrous wadsleyite and hydrous ringwoodite

Cited by 91 publications

References 28 publications

Hydration effects on crystal structures and equations of state for silicate minerals in the subducting slabs and mantle transition zone

Hydration effects on crystal structures and equations of state for silicate minerals in the subducting slabs and mantle transition zone

Intraplate volcanism due to convective instability of stagnant slabs in the mantle transition zone

Comparative compressibility of hydrous wadsleyite and ringwoodite: Effect of H₂O and implications for detecting water in the transition zone

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Thermal expansion of wadsleyite, ringwoodite, hydrous wadsleyite and hydrous ringwoodite

Cited by 91 publications

References 28 publications

Hydration effects on crystal structures and equations of state for silicate minerals in the subducting slabs and mantle transition zone

Hydration effects on crystal structures and equations of state for silicate minerals in the subducting slabs and mantle transition zone

Intraplate volcanism due to convective instability of stagnant slabs in the mantle transition zone

Comparative compressibility of hydrous wadsleyite and ringwoodite: Effect of H2O and implications for detecting water in the transition zone

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Product

Resources

About

Comparative compressibility of hydrous wadsleyite and ringwoodite: Effect of H₂O and implications for detecting water in the transition zone