1. 中国地震局 地球物理研究所 地震观测与地球物理成像重点实验室, 北京 100081;
2. 中国地震局 地球物理研究所, 北京 100081;
3. Research Center of Astronomy and Geophysics, Mongolian Academy of Sciences, Ulaanbaatar 210351, Mongolia
Basic petrophysical properties of rocks from the Suhbaatar-Ulaanbaatar-Dalandzadgad geophysical profile in Mongolia
1. Key Laboratory of Seismic Observation and Geophysical Imaging, Institute of Geophysics, China Earthquake Administration, Beijing 100081, China;
2. Institute of Geophysics, China Earthquake Administration, Beijing 100081, China;
3. Research Center of Astronomy and Geophysics, Mongolian Academy of Sciences, Ulaanbaatar 210351, Mongolia
To well understand the deep structure environment and mechanism of strong earthquakes occurred in the Tianshan-Mongolia-Lake Baikal seismic belt, an integrated geomagnetic and gravity survey was conducted along the profile from Suhbaatar to Ulaanbaatar to Dalandzadgad in Mongolia. In this paper, petrophysical parameters (bulk density, magnetic susceptibility, intensity of natural remanent magnetization, and Köenigsberger ratio) of 585 rock samples collected from this profile are summarized. Results indicate that significant density contrast of different rocks would result in variable gravity anomalies along the profile. Magnetic susceptibility and natural remanent magnetization of all rocks are variable, covering 3~5 orders of magnitude, which would make a variable induced magnetization and further links to complex magnetic anomalies in ground surface. These petrophysical parameters provide essential constraints on the interpretation of geophysical data and to calibrate geophysical parameters.
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