Abstract
AbstractSystematic analysis on isothermal remnant magnetization and thermal demagnetization displays that the deep volcanic rocks in the north of the Songliao Basin have two groups of stable remnant magnetization components comprising characteristic remnant magnetization and viscous remnant magnetization, with magnetite as the magnetic remnant carrier. The corrected characteristic remnant magnetization direction supports that it is reliable to apply viscous remnant magnetization in core orientation. The results of orientation show that there are four main groups of fracture in volcanic rocks with their trending in northeast, northwest, near north to south and near west to east, and the former two groups are dominant. Orientation results resolved by paleomagnetic method are confirmed by borehole image logging.
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