福建泉州市区域稳定性的探讨
|
摘要
本文对泉州市区域地壳结构、地质构造、构造应力场和地震活动性进行了综合分析。结果表明,泉州市在第四纪中更新世之前位于环太平洋中、新生代构造—岩浆活动带中,地壳运动频繁而又强烈,地质构造复杂;现代处于菲律宾海板块对欧亚板块挤压形成的"台湾动力触角"影响区,但区内的断裂不具全新世活动性,新构造运动不强烈,有史以来未见≥5.0级地震记载,属于地壳相对稳定区,未来遭遇6.0级地震的危险性不大,其地震破坏性影响主要来自周边孕震区,特别是东部海域,与"台湾动力触角"的作用和滨海断裂带的活动有关。
Based on the previous geological data,the author made a comprehensive analysis of the regional crustal structures,regional tectonics,neotectonic movement,regional tectonic stress field and regional seismic activity in the downtown of Quanzhou City.The results show that before the middle Pleistocene epoch of Quaternary the downtown of Quanzhou City was situated at the Mesozoic and Cenozoic tectonic-magmatic activity belt of the circum-Pacific belt,where the crustal movement was frequent and intense and the regional geological structure was complicated.At the present time,it is situated in the influence area of "Taiwan dynamic tentacle" formed by compression of the Philippines sea plate against the Eurasian plate.In the studied area the fractures are not active,the neotectonic movement is not intense and there are no records of earthquakes with seismicity ≥5.0 in throughout history of Quanzhou City.Therefore,the city belongs to a relatively stabilized zone of the crust.In the future it is impossible to suffer the earthquake with seismicity of 6.0,and the influence of earthquake damage will mainly come from the seismogenic zones of its peripheral areas,especially the eastern sea area,which is inferred to be related with the effect of "Taiwan dynamics tentacle" and the movement of offshore fracture zones.
Based on the previous geological data,the author made a comprehensive analysis of the regional crustal structures,regional tectonics,neotectonic movement,regional tectonic stress field and regional seismic activity in the downtown of Quanzhou City.The results show that before the middle Pleistocene epoch of Quaternary the downtown of Quanzhou City was situated at the Mesozoic and Cenozoic tectonic-magmatic activity belt of the circum-Pacific belt,where the crustal movement was frequent and intense and the regional geological structure was complicated.At the present time,it is situated in the influence area of "Taiwan dynamic tentacle" formed by compression of the Philippines sea plate against the Eurasian plate.In the studied area the fractures are not active,the neotectonic movement is not intense and there are no records of earthquakes with seismicity ≥5.0 in throughout history of Quanzhou City.Therefore,the city belongs to a relatively stabilized zone of the crust.In the future it is impossible to suffer the earthquake with seismicity of 6.0,and the influence of earthquake damage will mainly come from the seismogenic zones of its peripheral areas,especially the eastern sea area,which is inferred to be related with the effect of "Taiwan dynamics tentacle" and the movement of offshore fracture zones.
引文
[1]地矿部福建地质矿产勘查开发局.福建省地质图(1∶500000)说明书[M].福州:福建省地图出版社,1998.
[2]何耀堂.晋江—永安断裂带在泉州盆地的表现特征及其对工程建设的影响[J].福建建筑,2006,98(2).
[3]廖其林,王振明,王屏路,等.福州—泉州—汕头地区地壳结构的爆炸地震研究[J].地球物理学报,1988,31(3).
[4]王培宗,陈跃安,等.福建省地壳上地幔结构及深部构造背景研究[J].福建地质,1993,12(2).
[5]郭令智,施央申,马瑞士.西太平洋中、新生代大陆边缘和岛弧构造的形成与演化[J].地质学报,1983,37(1).
[6]张庆龙,陈金水,谢承涛,等.福建省地体构造及其演化[M].福州:福建省地图出版社,2004.
[7]丁祥焕,王耀东,叶盛基,等.福建东南沿海活动断裂与地震[M].福州:福建省科学出版社,1999.
[8]林锦华.长乐—诏安断裂带活动特征与继承活动[J].华南地震,1999,19(2).
[9]何耀堂.泉州湾工程地质条件及港口规划建设的探讨[J].福建地质,2005,24(4).
[10]何耀堂.泉州沿海全新世钙质碎屑岩特征及其成因的初步认识[J].福建地质,2006,25(1).
[11]林纪曾,梁国昭,赵毅,等.东南沿海地区的震源机制与构造应力场[J].地震学报,1980,2(3).
[12]魏柏林,徐辉龙,谢明富.东南沿海地震区的现代构造应力场[J].华南地震,1996,16(4).
[2]何耀堂.晋江—永安断裂带在泉州盆地的表现特征及其对工程建设的影响[J].福建建筑,2006,98(2).
[3]廖其林,王振明,王屏路,等.福州—泉州—汕头地区地壳结构的爆炸地震研究[J].地球物理学报,1988,31(3).
[4]王培宗,陈跃安,等.福建省地壳上地幔结构及深部构造背景研究[J].福建地质,1993,12(2).
[5]郭令智,施央申,马瑞士.西太平洋中、新生代大陆边缘和岛弧构造的形成与演化[J].地质学报,1983,37(1).
[6]张庆龙,陈金水,谢承涛,等.福建省地体构造及其演化[M].福州:福建省地图出版社,2004.
[7]丁祥焕,王耀东,叶盛基,等.福建东南沿海活动断裂与地震[M].福州:福建省科学出版社,1999.
[8]林锦华.长乐—诏安断裂带活动特征与继承活动[J].华南地震,1999,19(2).
[9]何耀堂.泉州湾工程地质条件及港口规划建设的探讨[J].福建地质,2005,24(4).
[10]何耀堂.泉州沿海全新世钙质碎屑岩特征及其成因的初步认识[J].福建地质,2006,25(1).
[11]林纪曾,梁国昭,赵毅,等.东南沿海地区的震源机制与构造应力场[J].地震学报,1980,2(3).
[12]魏柏林,徐辉龙,谢明富.东南沿海地震区的现代构造应力场[J].华南地震,1996,16(4).
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心