Original scientific paper

https://doi.org/10.15233/gfz.2022.39.3

Interpretation of the magnetic anomalies over the Mid-Atlantic Ocean Ridge using Swarm-A satellite

Ilkin Özsöz orcid.org/0000-0001-5907-4176 ; General Directorate of Mineral Research and Exploration, Marine Research Department, Ankara, Turkey
Ankaya Pamukçu ; Dokuz Eylul University, Engineering Faculty, Geophysical Engineering Department, İzmir, Turkey

Abstract

The procedures and interpretation of the magnetic data measured over the Mid-Atlantic Ocean Ridge by Swarm-A satellite is discussed in this paper. The data processing procedure has four phases after the data format conversion. The first phase is the selecting data whose Kp index is lower than 1. Secondly, the main magnetic field should be subtracted from the measured data for example through the IGRF model. This step is followed by removing trend, related to the satellite trajectory. The final step is eliminating the dipole nature of the magnetic field via Reduction to the Pole (RTP). Nonetheless, the RTP process might cause misinterpretation over the large study area and lower latitudes. Therefore, the amplitude of the analytic signal (AS) is used as an alternative to the RTP. The qualitative interpretation of the magnetic anomaly is conducted via AS anomaly, bathymetry, heat flow and tectonic map. Quantitatively correlation coefficients of bathymetry and heat flow with respect to AS are interpreted.

Keywords

SWARM; magnetic data processing; analytic signal; qualitative and quantitative interpretation

Hrčak ID:

280005

URI

https://hrcak.srce.hr/280005

Publication date:

4.7.2022.

Article data in other languages: croatian

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