Journal
JOURNAL OF EARTH SYSTEM SCIENCE
Volume 124, Issue 4, Pages 683-695Publisher
INDIAN ACAD SCIENCES
DOI: 10.1007/s12040-015-0568-7
Keywords
Iron crystallization; asymmetric and anisotropic inner core; fluctuating inner core rotation; Ramachandran interaction theory
Ask authors/readers for more resources
Solidification mechanism at the Lehmann (inner core) boundary are postulated on the basis of Ramachandran interaction by taking the fluctuating inner core super-rotation into account. The postulates are found to be consistent with compressional or P-wave velocity obtained from seismic data analysis. We justify these postulates to be physically sound and precise, and show that the fluctuating inner core super-rotation causes significant changes to the strength of Fe-Fe Ramachandran interaction, which then leads to the observed asymmetric and anisotropic inner core. Our postulates also reliably explain that the depth-dependent anisotropic P-wave attenuation close to inner core surface (to about 100 km deep) is due to phonon excitation probability and different atomic orientation. We also discuss the consistency of our postulates with respect to asymmetric inner core anisotropy (between western and eastern inner core hemispheres).
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available