Publications by authors named "Tamara Gudkova"
The detection of deep reflected S waves on Mars inferred a core size of 1,830 ± 40 km (ref. ), requiring light-element contents that are incompatible with experimental petrological constraints. This estimate assumes a compositionally homogeneous Martian mantle, at odds with recent measurements of anomalously slow propagating P waves diffracted along the core-mantle boundary.
View Article and Find Full Text PDFSeismic detection of a deep mantle discontinuity within Mars by InSight.
Proc Natl Acad Sci U S A
October 2022
Article Synopsis
- Scientists are studying the inside of Mars to learn how it formed and changed over time, focusing on its deep mantle where certain minerals change under pressure.
- They found evidence of a special boundary in Mars' mantle using data from NASA's InSight Mission, which helps understand its temperature and composition.
- Their research suggests that the Martian mantle is colder and contains more iron than Earth's, and they’ve narrowed down possible compositions that match the boundary they observed.
Clues to a planet's geologic history are contained in its interior structure, particularly its core. We detected reflections of seismic waves from the core-mantle boundary of Mars using InSight seismic data and inverted these together with geodetic data to constrain the radius of the liquid metal core to 1830 ± 40 kilometers. The large core implies a martian mantle mineralogically similar to the terrestrial upper mantle and transition zone but differing from Earth by not having a bridgmanite-dominated lower mantle.
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