Probing the Thickness of Ophiolites through Magnetotelluric Survey to Constrain Hydrogen Origin at Bulqizë

7 recordings using two PhoenixGeophysicsÒ stations equipped with wideband MTU-5C receivers recorded electromagnetic signals over a frequency range from 10,000 Hz to 2 × 10⁻⁵ Hz (50 000 s) in the Bulqizë massif (May 2024). This setup covered both Audio-Magnetotelluric (AMT) and conventional MT spectra. Each receiver featured five channels: two for the horizontal electric field and three for the magnetic field. Magnetic data were recorded using two MTC-155 magnetometers (oriented along north–south and east–west) and one MTC-185 magnetometer for the vertical component. A central non-polarizing PE5 electrode (Pb–PbCl₂) served as a common reference for electric field measurements, with four additional electrodes placed at the cardinal points