摘要
为了排除水动型海平面升降影响,本文根据1981—1987年所获得的资料,应用大海岸阶地综合纵剖面分析法,讨论了长山群岛和辽东半岛南部海岸阶地及其所反映的新构造运动性质。结果表明:第四纪期间,研究区经历了强烈的整体性断块上升运动,区内未发现明显的隆起、凹陷或断层的垂直错动,而是显示了由东南向西北轻微掀斜式的继承性整体构造上升特点。此外,依据第四纪、近代和现代的构造上升速率,认为本区仍保持着新构造上升的总趋势,地震危险程度不大。
According to the great synthetical longitudinal profiling of marine terrace and on the basis of regional geomorphic and Quaternary correlation investigated in 1981-1987, the feature of the neotectonic movements on the Changshan Islands and the southern Liaodong peninsula is discussed. The results show that the study area experienced a violent block-uplifting with a slight up-tilting from southeast to northwest during Quaternary period. No apparent upwarping, depressing and vertical fault displacement are found within the study area. The uplifting rate of the area was 0.12mm/a in Quaternary period, 1.18mm/a in the past 5000 years and 3.5mm/a in recent times, reflecting a general trend that the tectonic uplifting gradually speed up with short-term stops. Owing to a lack of great active fault zones with the section of tectonic stress concentration and locking, the study area is considered to be a safe one with out the risk of strong, destructive earthquakes.
出处
《海洋与湖沼》
CAS
CSCD
北大核心
1992年第2期124-132,T001,共10页
Oceanologia Et Limnologia Sinica
基金
国家地震局地震联合基金资助课题(86协006号)
关键词
长山群岛
海岸
阶地
新构造运动
Changshan Islands, Liaodong Peninsula, Marine terrace, Neotectonic movements.
