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- W3171867043 abstract "Abstract Almost no in situ seismic data are available for Venus; therefore, we can constrain the deep structure of this planet only from the geodetic data obtained by spacecraft. Of particular interest is Venus’s core‐mantle boundary, which holds clues about the origin and evolution of this celestial body. In this study, we build a series of different mantle/core models of Venus based on several mantle composition models and compare their associated Love numbers k 2 with the observed values. Due to the large uncertainty in the observed values of k 2 , the state of Venus’s core cannot be reliably constrained. However, the expected precision of k 2 obtained by the EnVision mission will sufficiently reduce the acceptable model space and contribute to estimating the mantle viscosity structure. Based on current geodetic data, we find that the bottom of Venus’s mantle may not feature a phase transition from perovskite to post‐perovskite if the FeO content of the mantle is less than 8.1 wt%; this region may be different from Earth’s D” layer. Furthermore, we find that the combination of observed k 2 and Q can be used to distinguish whether the lowermost part of Venus’s mantle is a high‐temperature basalt layer or a thin thermal boundary layer if observations of Q can be obtained." @default.
- W3171867043 created "2021-06-22" @default.
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- W3171867043 date "2021-06-30" @default.
- W3171867043 modified "2023-10-18" @default.
- W3171867043 title "Possible Deep Structure and Composition of Venus With Respect to the Current Knowledge From Geodetic Data" @default.
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- W3171867043 doi "https://doi.org/10.1029/2019je006243" @default.
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