黄岛地区NW向断裂特征及其地质环境意义的探讨
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摘要
黄岛地区断裂构造较为发育,与NE向断裂相比,NW向断裂规模较小,有关其分布、特征及性质等至今仍缺少系统的研究,研究相对薄弱。通过野外地质踏勘和地质制图,对黄岛地区NW向断裂特征进行详细分析。结合地质剖面分析,初步厘定了区内NW向断裂的活动性质,在此基础上进一步探讨了其对工程地质和地震地质的影响。研究表明,黄岛地区NW向断裂包括蒋家店子断裂、大楼村断裂和赵家河断裂,活动性质以正断层为主,并伴有左旋走滑特征。NW向断裂控制了黄岛地区的主体构造格局,尤其对当地山体聚落分布和房屋等建设群的展布方向有重要控制作用;同时,NW向断裂的展布与环胶州湾地区现代震中的分布趋势吻合较好,成为最可能的孕震和发震断裂。上述研究对黄岛地区城市规划及地质环境的监测具有重要意义。
The faulted structures in Huangdao Area are well developed. Compared with the NE strike faults, the scale of NW strike faults is much smaller, of which the distribution, characteristics and properties are still lack of systematic study. Through field geological reconnaissance and geological mapping, detailed analysis was carried out on the characteristics of NW strike faults in Huangdao Area.Combined with the geological profile analysis, this paper gives a preliminary determination of the active properties and time of NW strike faults, and further discusses its influence on engineering geology and seismic geology. The study shows that the active properties of NW strike faults, including Jiangjiadianzi Fault, Dalou Village Fault and Zhaojiahe Fault, are mainly of normal faults, accompanied by left-lateral strike-slip. The NW strike faults play an important role on controlling the tectonic framework in Huangdao Area, especially on the mountain settlement and the distribution direction of local houses.Meanwhile, the NW strike faults fit very well with the distribution tendency of modern epicenter across Jiaozhou Bay, which become the most possible seismogenic faults. This study is of great significance in urban planning and geo-environmental monitoring in Huangdao Area.
The faulted structures in Huangdao Area are well developed. Compared with the NE strike faults, the scale of NW strike faults is much smaller, of which the distribution, characteristics and properties are still lack of systematic study. Through field geological reconnaissance and geological mapping, detailed analysis was carried out on the characteristics of NW strike faults in Huangdao Area.Combined with the geological profile analysis, this paper gives a preliminary determination of the active properties and time of NW strike faults, and further discusses its influence on engineering geology and seismic geology. The study shows that the active properties of NW strike faults, including Jiangjiadianzi Fault, Dalou Village Fault and Zhaojiahe Fault, are mainly of normal faults, accompanied by left-lateral strike-slip. The NW strike faults play an important role on controlling the tectonic framework in Huangdao Area, especially on the mountain settlement and the distribution direction of local houses.Meanwhile, the NW strike faults fit very well with the distribution tendency of modern epicenter across Jiaozhou Bay, which become the most possible seismogenic faults. This study is of great significance in urban planning and geo-environmental monitoring in Huangdao Area.
引文
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[2]栾光忠,刘红军,范德江.青岛胶州湾地质特征及其成因[J].海洋湖沼通报,1998,15(3):18-23.
[3]栾光忠,赵淑娟,王庆帅,等.青岛劈石口断裂的构造特征和现代活动性研究[J].中国海洋大学学报(自然科学版),2009,39(2):299-303.
[4]Kerui C,Shi Y S.Offset of rock bodies on the both sides of Muping-Qingdao fault zone in eastern Shandong,China[J].Journal of Nanjing University(Natural Sciences Edition),1994,30(4):648-661.
[5]葛君,张泽坤,倪金龙,等.牟平—即墨断裂带南端断裂构造特征及动力学成因[J].现代地质,2015,29(4):747-754.
[6]赵广涛,王德滋,曹钦臣.崂山花岗岩岩石地球化学与成因[J].高校地质学报,1995,3(1):1-15.
[7]李乃胜,于洪军,赵松龄,等.胶州湾自然环境与地质演化[M].北京:海洋出版社,2006:67-70.
[8]周汝国.青岛小珠山花岗岩岩石谱系单位划分及其主要特征[J].山东国土资源,2001,17(6):32-38.
[9]李起彤.活断层及其工程评价[M].北京:地震出版社:52-60.
[10]李桂群.青岛区域构造特征及其与地震的关系[J].海洋湖沼通报,1994,16(3):26-32.