这样高的古地温梯度肯定与构造热事件有关。

This is evidently related to tectonic thermal event.

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应用镜质体反射率法恢复了古地温及古地温梯度。

This paper restores the palaeogeotherm and palaeogeothermal gradient in Songliao Basin using several methods.

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结果表明：滨北地区白垩纪古地温梯度高于现今地温梯度，古地温梯度在晚白垩世为4。

The simulated results are as follows: the paleo-geothermal gradient was higher than the current, it was about 4.

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