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综合分析各种地质、地球化学和地震资料并结合动态模拟技术,探讨了歧南断阶带的温度压力场特征及其演化规律。研究结果表明,歧南断阶带经历过多期复杂的热事件,古地温梯度明显高于现今地温梯度,热流体活动强烈。现今剖面压力系统由浅部正常压力、中部弱超压和深部强超压3个部分组成,断层的发育特征对超压的分布具明显且重要的控制作用;古压力场的演化经历了原始积累、部分释放、缓慢再积累和快速再积累4个阶段。
By comprehensively analyzing various geologic, geochemical and seismic data and combining with dynamic simulation technology, the characteristics and evolution of temperature and pressure fields in Qilan fault zone are discussed. The results show that the Qiaonan fault zone experienced many complex thermal events, the ancient geothermal gradient is significantly higher than the current geothermal gradient, thermal fluid activity is strong. Nowadays, the profile pressure system consists of three parts: normal pressure in the shallow part, weak overpressure in the middle part and deep strong overpressure. The developmental features of the faults have significant and important control over the distribution of overpressure. The evolution of the paleostress field has undergone primitive accumulation, Partially released, slowly re-accumulation and rapid re-accumulation of four stages.