摘要:
本文根据近期取得的一些新资料并结合前人的工作结果,分析了八宝山断裂和黄庄-高丽营断裂的构造活动性。新生代时期,黄庄-高丽营断裂是北京拗陷的主要西界断裂,八宝山断裂的活动远不及它强烈,前一条断裂活动强烈的部分随时间具有自南而北转移的特点。两条断裂第四纪均有活动,但八宝山断裂活动主要在早更新世,此后活动甚弱;黄庄一高丽营断裂中更新世仍显著活动,其北段活动持续到晚更新世甚至全新世。黄庄-高丽营断裂的活动强度,总体表现南弱北强;活动时间南部早而北部延续到很晚;活动性质,中段和南段右旋水平剪切显著,北段的垂直差异活动占优势。
Abstract:
The tectonic activities of Babaoshan and Huangzhuang-Gaoliying faults are studied,based on new geological data obtained recently.During Cenozoic time Huangzhuang-Gaoliying fault is the main western boundary fault of Beijing Depression and the activity of Huangzhuang-Gaoliying fault was stronger than that of Babaoshan fault.The former be-haves the feature that the high activity part of the fault has changed from the south to the North with the time.Both of the faults are active in Quaternary, but the strong active period of Babaoshan fault was mainly in the Early Pleistocene and activity became very weak later.Till the Middle Pleistocene, Huangzhuang-Gaoliying fault was still very active, its north-ern segment till the Late Pleistocene, even Holocene.In general, the activity of the southern segment of Huangzhuang-Gaoliying fault is weaker than that of the northern one;the ac-tive time of the southern ceased early, but the northern lasted to very late;and the active character of the middle and the southern was dextral-slip, the northern mainly the dip-slip.
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