**An inversion approach for analysing the physical properties of a seismic low-velocity layer in the upper mantle.** / Xiao, Jie; Hier-Majumder, Saswata; Tauzin, Benoit; Waltham, Dave.

Research output: Contribution to journal › Article

E-pub ahead of print

**An inversion approach for analysing the physical properties of a seismic low-velocity layer in the upper mantle.** / Xiao, Jie; Hier-Majumder, Saswata; Tauzin, Benoit; Waltham, Dave.

Research output: Contribution to journal › Article

Xiao, J, Hier-Majumder, S, Tauzin, B & Waltham, D 2020, 'An inversion approach for analysing the physical properties of a seismic low-velocity layer in the upper mantle', *Physics of the Earth and Planetary Interiors*. https://doi.org/10.1016/j.pepi.2020.106502

Xiao, J., Hier-Majumder, S., Tauzin, B., & Waltham, D. (2020). An inversion approach for analysing the physical properties of a seismic low-velocity layer in the upper mantle. *Physics of the Earth and Planetary Interiors*, [106502]. https://doi.org/10.1016/j.pepi.2020.106502

Xiao J, Hier-Majumder S, Tauzin B, Waltham D. An inversion approach for analysing the physical properties of a seismic low-velocity layer in the upper mantle. Physics of the Earth and Planetary Interiors. 2020 May 4. 106502. https://doi.org/10.1016/j.pepi.2020.106502

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title = "An inversion approach for analysing the physical properties of a seismic low-velocity layer in the upper mantle",

abstract = "In this article, we propose a new inversion scheme to calculate the melt volume fractions from observed seismic anomalies in a low-velocity layer (LVL) located atop the mantle transition zone. Our method identifies the trade-offs in the seismic signature caused by temperature, solid composition, melt volume fraction, and dihedral angle at the solid-melt interface. Using the information derived from the amplitude of P-to-S conversions beneath the western US, we show that the multiple permissible solutions for melt volume fractions are correlated to each other. Any possible solution can be directly transformed into alternative solutions whilst leaving the model output unchanged. Hence, the additional solutions can be rapidly derived given an initial solution. The calculation of multiple solutions reveals the universal properties of the whole range of solutions. A regional-averaged melt volume fraction of at least 0.5% occurs in every solution, even though a unique interpretation does not exist. ",

author = "Jie Xiao and Saswata Hier-Majumder and Benoit Tauzin and Dave Waltham",

year = "2020",

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doi = "10.1016/j.pepi.2020.106502",

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AU - Xiao, Jie

AU - Hier-Majumder, Saswata

AU - Tauzin, Benoit

AU - Waltham, Dave

PY - 2020/5/4

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N2 - In this article, we propose a new inversion scheme to calculate the melt volume fractions from observed seismic anomalies in a low-velocity layer (LVL) located atop the mantle transition zone. Our method identifies the trade-offs in the seismic signature caused by temperature, solid composition, melt volume fraction, and dihedral angle at the solid-melt interface. Using the information derived from the amplitude of P-to-S conversions beneath the western US, we show that the multiple permissible solutions for melt volume fractions are correlated to each other. Any possible solution can be directly transformed into alternative solutions whilst leaving the model output unchanged. Hence, the additional solutions can be rapidly derived given an initial solution. The calculation of multiple solutions reveals the universal properties of the whole range of solutions. A regional-averaged melt volume fraction of at least 0.5% occurs in every solution, even though a unique interpretation does not exist.

AB - In this article, we propose a new inversion scheme to calculate the melt volume fractions from observed seismic anomalies in a low-velocity layer (LVL) located atop the mantle transition zone. Our method identifies the trade-offs in the seismic signature caused by temperature, solid composition, melt volume fraction, and dihedral angle at the solid-melt interface. Using the information derived from the amplitude of P-to-S conversions beneath the western US, we show that the multiple permissible solutions for melt volume fractions are correlated to each other. Any possible solution can be directly transformed into alternative solutions whilst leaving the model output unchanged. Hence, the additional solutions can be rapidly derived given an initial solution. The calculation of multiple solutions reveals the universal properties of the whole range of solutions. A regional-averaged melt volume fraction of at least 0.5% occurs in every solution, even though a unique interpretation does not exist.

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DO - 10.1016/j.pepi.2020.106502

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JF - Physics of the Earth and Planetary Interiors

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