Diagram of apparent resistivity phase curves of magnetotelluric in Songliao Basin, Northeast China

<p>The research&nbsp;area is located at an expanse of 120,000 square kilometers in northeastern China, including Heilongjiang Province, Jilin Province, and Liaoning Province (about 123&deg;-127&deg; east longitude and about 45&deg;-49&deg; north latitude). The basin is divided into five primary structural units according to the distribution and development characteristics of the fault depressions, namely;&nbsp;the central depression zone&nbsp;, the southeast uplift zone&nbsp;, the northeast uplift zone&nbsp;,the northern plunge zone&nbsp;,&nbsp;and the west slope zone&nbsp;.&nbsp;Multiple secondary fault depressions and fault uplifts&nbsp;lie&nbsp;inside. This work used&nbsp;a total of 157 broadband magnetotelluric sounding data points. MTU-5 magnetotelluric instruments produced by Phoenix Geophysics of Canada were used for field collection of magnetotelluric sounds and the effective frequency band was 320~0.0005 Hz. The poles were arranged according to the&nbsp;tensor measurement method. Each measuring point measures 5 components, 3 of them being magnetic field components while the other 2 are mutually&nbsp;orthogonal horizontal electric field components. The signal acquisition time was about 20&nbsp;hours and the average point distance was 10 km. This is a diagram of apparent resistivity phase curves including every&nbsp;broadband magnetotelluric sounding data points.</p>