上海金山深水槽两侧第四纪地层错断现象的分析

地震地质 ›› 1988, Vol. 10 ›› Issue (2): 57-64.

上海金山深水槽两侧第四纪地层错断现象的分析

季幼庭, 李端璐

江苏省地震局

收稿日期:1986-05-31 出版日期:1988-06-01 发布日期:2009-11-25

ANALYSIS OF "QUATERNARY FAULTS" ON THE SIDES OF JINSHAN TROUGH, SHANGHAI

Ji You-ting, Li Duan-lu

Seismological Bureau of Jiangsu Province

Received:1986-05-31 Online:1988-06-01 Published:2009-11-25

摘要/Abstract

摘要： 浅层人工地震剖面记录的金山深水槽两侧第四纪上部地层的“错断”现象,仍是在深水槽发展、演化过程中,由于原有的冲刷面、冲刷陡坎被后期淤积而形成的在成分和结构上存在着物性差异的界面,也有一部分是深水槽演化过程中沿槽壁发生的水下滑坡。深水槽内部与两侧上部的反射界面不是同一时代地层的显示。因此,在金山深水槽两侧不存在第四纪活动断层。

关键词: 上海, 金山, 深水槽, 潮流冲刷, 反射界面“错断”, 非断层标志

Abstract: The phenomena of faulting in the upper part of Quaternary strata on the sides of Jinshan trough near Shanghai, shown by a superficial reflection profiling, represent a limiting interfaces of different media in constituent and construction, which formed by later deposition in the former erosion surface and gulch during the development and evolution of the trough. They are in part the slips occurred beneath water along the trough walls during its development. The reflective interfaces in the upper part and interior of the trough come from the stratification of different ages. Therefore, there are no Quaternary active faults on the sides of Jinshan trough.

Key words: Shanghai, Jinshan, Trough, Flow erosion, "Faulting" of the reflective interface, No fault mark

季幼庭, 李端璐. 上海金山深水槽两侧第四纪地层错断现象的分析[J]. 地震地质, 1988, 10(2): 57-64.

Ji You-ting, Li Duan-lu. ANALYSIS OF "QUATERNARY FAULTS" ON THE SIDES OF JINSHAN TROUGH, SHANGHAI[J]. SEISMOLOGY AND GEOLOGY, 1988, 10(2): 57-64.

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