摘要
金城关断层是兰州盆地北部边界的一条重要断层。野外地质调查和钻探资料证实,金城关断层断错在前寒武系变质岩和第三纪砂岩之间及早更新世砾岩之间,其活动时代为第四纪早期。沙井驿-白塔段和五一山段明确有断层存在,而青白石段和南坡坪段不存在断层,金城关断层的实际断层长度只有25km。
The Jinchengguan Fault is an important fault in the northern margin of Lanzhou Basin. Field geological surveys and drilling-bore data confirmed that the Jinchengguan Fault is formed between the metamorphic rock of Precambrian and sandstone of tertiary or conglomerate of Eopleistocene, and its active age is in Early-Quaternary period. It is determined that the fault exists in the segments of Shajingyi-Baitashan and Wuyishan, but does not exit in the segments of Qingbaishi and Nanpoping. The actual length of Jinchengguan Fault is only 25km.
出处
《中国地震》
CSCD
北大核心
2008年第3期247-252,共6页
Earthquake Research in China
基金
中国地震局“十五”重点建设项目--兰州市活断层探测与地震危险性分析(I-4-48)项目资助,中国地震局兰州地震研究员论著编号:LC200800019
关键词
兰州
金城关断层
活动特征
Lanzhou Jinchengguan fault Active characteristics
