摘要
取该区活动断裂中的断层泥，并首次在几个断层面附近的劈理化黄土中取样测出热释光年龄。１２个断层热释光年龄数据在２０—２４０ｋａＢＰ之间变化，证实中更新世晚期和晚更新世期间断层曾有一次活动，为本区断层的活动性提供了证据。本研究成果也为西安地裂缝的活断层与人工抽水双重成因提供了证据。
Thermoluminecence datings of the fault gouge and the adjoining cleaved loess of the area gives an age of 20—240 ka B P.It shows that the faults have been active during the late middle pleistocene to Late Pleistocene.Geomorphological and geological evidences are provided to show the alternation of rapid movement and show creep of the faults.The ground fissures in Xi'an City are in fact active faults,having been triggered to revive by pumping water from the confined aquifer.
出处
《地质力学学报》
CSCD
1998年第4期88-96,F003,共10页
Journal of Geomechanics
基金
中国科学院黄土与第四纪地质国家重点实验室资助
关键词
关中
活断层
地裂缝
热释光测年
年代学
active fault
ground fissure
thermohuminecence dating
Guanzhong
