摘要
研究一个地区断层主要活动时期是了解地壳构造运动或断层发育历史的基础。本文仍沿用了传统研究法,并将同位素法和石英形貌法测年与显微构造分析法引进到研究断层主要活动时期的工作中,取得了能相互映正的结果,最后确定阳原盆地化稍营地区的断层经历过:元古代前;燕山期;6～9千万年;上新世——早更新世和最后一次较强烈活动在20—30万年以前等五次主要活动时期。
The Information on the major periods of fault activities in a region is a basis for understanding the history of crustal motion or fault development. In this paper, the major periods of faulting in Huashaoying area, Yangyuan Cornty, have been studied by means of the traditional geological methods combining with isotopic dating, quartz surface textuer observing and microstructural analysis, and the better results have been obtainde. The main periods of faulting in the area are as follows: pre—proterozoic era; Yanshan cycle; the period of 60—90ma; Pliocen—Early Pleistocene epoch and the last period of 0.2—0.3ma
出处
《华北地震科学》
北大核心
1993年第2期35-44,共10页
North China Earthquake Sciences
基金
国家自然科学基金(4880138)
关键词
断层
活动时期
同位素法
盆地
地震
Major periods of faulting, Isotopic dating, Quartz surface textuee, Microstructrral analysis
