地质论评2017，Vol.63Issue(3)：719-738,20.DOI:10.16509/j.georeview.2017.03.013
软沉积物变形中负载、球—枕构造的古地震研究综述
Paleoearthquake Researches via Soft Sediment Deformation of Load, Ball-and-Pillow Structure: A Review
摘要
Abstract
Soft-sediment deformation (SSD) are reliable evidences for demonstrating paleoearthquake occurrences in tectonically active regions.However,many researchers only noticed the shape classification of SSD.In contrast,systematic discussion the genetic analysis,trigger mechanism,deformation process of SSD are lack.What's more,whether the SSD can record seismic events,and the relationship between intensity of SSD and the earthquake magnitudes and epicenter distances remains a matter of debate.Focusing on this topic,we choose a typical deformation of load,ball-and-pillow structure in SSD,from its specific characteristic,genetic analysis,trigger mechanism,deformation process,deformation intensity,and the relationship with earthquake magnitudes and epicentral distances.The statistical results show that load,ball-and-pillow structure represent a minimum seismic magnitude of 5 and maximum magnitude of more than 8,and mostly correspond to magnuitudes 6-7 and epicentral distances of 20-70 km.For a given intensity of load,ball-and-pillow structure,a largest earthquake magnitudes is required to generate these structures in lacustrine sediments,followed by fluvio-lacustrine,marine sediments.The deformation layer width and thickness of load,ball-and-pillow structure and ball radius sizes,which have positive correlation with earthquake magnitudes.The lithology is not directly corresponding to the earthquake magnitudes.It is possible to assesment of epicentral location or the maximum liquified distances by using the earthquake magnitude which evalute from the intensity of SSD,also in turn.SSD not only can record seismic events,but also evalute the earthquake magnitudes and epicentral location according to their deformation form,size and intensity etc.So the SSD provides a relatively independent research interests for the paleoearthquake research.关键词
软沉积物变形/负载构造/球—枕构造/变形过程/古地震Key words
soft sediment deformation/load/ball-and-pillow structure/deformation process/paleo-earthquake引用本文复制引用
钟宁,蒋汉朝,梁莲姬,徐红艳,彭小平..软沉积物变形中负载、球—枕构造的古地震研究综述[J].地质论评,2017,63(3):719-738,20.基金项目
本文为中国地震局地质研究所基本科研业务专项(编号:IGCEA1508)、地震动力学国家重点实验室自主课题(编号:LED2013A03)和国家自然科学基金资助项目(编号:41572346)的成果.This work was financially supported by the special project of the fundamental scientific research of the Institute of Geology,China Earthquake Administration (IGCEA1508),the State Key Laboratory of Earthquake Dynamics (LED2013A03) and the National Natural Science Foundation of China (41572346). （编号:IGCEA1508）
