Lithospheric structure beneath the ultra-slow spreading Knipovich ridge using noise reduced OBS P-wave Receiver functions ...

• Main Authors: Rein, Theresa, Zahra, Zali, Frank, Krüger, Vera, Schlindwein
• Format: Conference Object
• Language: unknown
• Published: GFZ German Research Centre for Geosciences 2023
• Subjects: Greenland; Knipovich Ridge; Greenland Sea
• Online Access: https://dx.doi.org/10.57757/iugg23-1638; https://gfzpublic.gfz-potsdam.de/pubman/item/item_5017944

<!--!introduction!--> Ultra-slow spreading ridges are characterized by huge volcanic complexes which are separated by up to 150 km long amagmatic segments. The mechanisms controlling these types of mid-oceanic ridges (MOR) are not yet fully understood. We aim to constrain the crustal and mantle structure beneath a segment of the Knipovich ridge (Greenland Sea) by using Receiver functions calculated from teleseismic events. Seismic data, recorded on the ocean bottom, are highly contaminated by different noise sources. Results of our noise reduction algorithm based on harmonic-percussive separation (HPS) techniques of selected KNIPAS station data show a significantly reduced noise level on all three seismometer components (below 1 Hz). Improving the SNR on OBS records reveals the superposition of water and sediment reverberations on the crustal structure information, the latter is strongly hindering the structure interpretation. Here, we compare the real data with a set of synthetic Receiver functions ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ...