【摘要】 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。更多还原

【Abstract】 By analyzing the data of geology, geochemistry and seismic synthetically and using the technique of dynamic modeling,it discusses the characteristics of temperature and pressure fields in Qi-nan fault step belt. Qinan fault step belt has undergone multiple thermal events with higher paleo-temperature gradient and hydrothermal fluid flow. The current pressure system in profiles consistsof normal pressure,low overpressure and high overpressure from top to bottom,which were controlled mainly by the distribution of faults obviously. The evolution of paleo-pressure field can bedivided into four stages as initial accumulation, partial pressure expulsion, slow re-accumulationand rapid re-accumulation.更多还原