Investigation of seismic anisotropy in the D'' layer and at the CMB regarding intense magnetic flux regions ...

• Main Authors: Fröhlich, Yvonne, Dillah, Muhammad Iman Fath, Dorn, Fiona, Ritter, Joachim R. R.
• Format: Still Image
• Language: English
• Published: Zenodo 2024
• Subjects: geophysics; seismology; lowermost mantle; seismic anisotropy; Canada; Indian; North Atlantic; Siberia
• Online Access: https://dx.doi.org/10.5281/zenodo.12658821; https://zenodo.org/doi/10.5281/zenodo.12658821

Within the Priority Program 2404 “Reconstructing the Deep Dynamics of Planet Earth over Geologic Time” (DeepDyn, https://www.geo.lmu.de/deepdyn/en/) we investigate possible seismic signatures at magnetic high-latitude flux lobes (HLFLs). The focus is on four target regions on the Northern Hemisphere: Siberia, Canada, North Atlantic and Indonesia. While Siberia and Canada show the HLFLs, the North Atlantic should be the location of a third postulated HLFL, but this area shows no intense-flux signal in the magnetic field. The region beneath Indonesia and the Indian Ocean is characterized by an area of intense magnetic flux that changes direction and moves westwards over time. Our aim is to understand whether mineralogy and seismic structure (i.e., thermal constraints) could be responsible for the different magnetic signatures at the core mantle boundary (CMB). This is done by combining two approaches: seismic anisotropy (KIT) and seismic reflections (University of Münster) near the CMB. To study anisotropy, we ...