Paleoearthquake Events of Early Cretaceous Laiyang Stage and Dinosaur Migration in Zhucheng, Shandong Province, Eastern China
详细信息
- 责任者：He Bizhu (State Key Laboratory of Continental Tectonics and Dynamics ; Institutes of Geology ; Chinese Academy of Geological Sciences ; Beijing 100037 ; China) ; Qiao Xiufu
- 刊名：Acta Geologica Sinica
- 出版年：2012
- 卷期：86(8)
- 关键词：古地震 ; paleoearthquakes ; 山东 ; Shandong Province
- 页码：p.1320-1330
- 图表：5 illus., 38 refs.
- 分类号：1103
- issnNo：ISSN0001-5717
- isbnNo：CN11-1951/P
摘要
In this study, several sets of paleo-earthquake records were found in the Yangzhuang Formation immediately in underlying and overlying track-hearing strata. Soft-sediment deformation structures include undulate fold, diapir, liquefied sand vein, liquefied breccias,convolute deformation and seismite unconformity, and graded faults. The analysis shows that initial sediments, sedimentary facies and tectonism determined structural deformation styles of soft sediments produced by seismic activities. Based on theidentified paleo-earthquake development records and their magnitude analysis, it can be assumed that seismogenic fault was likely the Wulan fault, the southern segment of faulting in this period. Paleo-seismicrecords can help built the link between paleo-earthquake events and deposition environment and tectonic evolution, and constrain attributes, frequencies and time-limit of teetonism, thus providing the evidence for determination ofbasin, surrounding structure and sedimentary development.