福建地震活动与岩石圈热结构的关系初探  

Preliminary Study on the Relationship Between Seismicity and Geothermal Structure of the Lithosphere in Fujian Province

作　　者：徐立 温泽鑫 周红伟 张国平 Xu Li;Wen Zexin;Zhou Hongwei;Zhang Guoping(Xiamen Institute of Marine Seismology CEA,Xiamen,China)

机构地区：[1]中国地震局厦门海洋地震研究所,福建厦门

出　　处：《科学技术创新》2025年第4期30-35,共6页Scientific and Technological Innovation

摘　　要：利用福建及邻近地区的大地热流值、岩石圈生热率和热导率等资料,绘制了福建地区大地热流与震中分布图,估算了福建地区岩石圈不同深度的温度值。福建地区大地热流与地震震中(2007-2020年,ML≥3.5)、震源深度与地温分布的对比研究表明:(1)福建地区地震主要发生在热应力集中的构造断裂带与热流梯级带交汇处;(2)福建地区地震活动最大震源深度一般位于10~20 km,震源区温度在250~450℃之间,震源的分布范围可能与地壳的脆韧性转换带有关。Using the data of heat flow,lithosphere heat generation and heat conductivity in the Fujian Province and its adjacent region,we drew the map of distribution of the heat flow within the epicenters in Fujian Province and estimated temperature on different depths of the lithosphere in Fujian Province.The contrast studies of the heat flow and epicenters of the earthquakes(2007-2017,ML≥3.5),the focal depth and the distribution of the geotemperature show that:(1)The earthquakes take place at the intersectional zone of tectonic faults and geothermal gradient belts in which the thermal stress concentrates;(2)The maximum focal depth of seismic activity in Fujian is generally 10~20 km,focal area temperatures are generally located between 250℃and 450℃,the distribution of focal depths is probably related to the brittle-ductile transition zone in the crust.

关 键 词：大地热流 震源深度 地温分布 福建 

分 类 号：P315[天文地球—地震学]