密云水库及邻区地貌成因、控盆要素及其区域构造意义  

Geomorphic origin,control basin factors and regional tectonic significance of Miyun Reservoir and adjacent areas

作　　者：关成尧[1,2] 姜纪沂 袁四化[1,2] 白相东[1,2] 刘晓燕 张艳[1,3] GUAN Chengyao;JIANG Jiyi;YUAN Sihua;BAI Xiangdong;LIU Xiaoyan;ZHANG Yan(Department of Earth Sciences and Engineering,China Institute of Disaster Prevention,Sanhe 065201,Hebei,China;Hebei Key Laboratory of Earthquake Dynamics,Sanhe 065201,Hebei,China;Department of Environment and Disaster management,China Institute of Disaster Prevention,Sanhe 065201,Hebei,China)

机构地区：[1]防灾科技学院地球科学与工程学院,河北三河065201 [2]河北省地震动力学重点实验室,河北三河605201 [3]防灾科技学院环境与灾害治理学院,河北三河065201

出　　处：《城市地质》2025年第1期47-59,共13页Urban Geology

基　　金：防灾科技学院教研教改项目(JY2021A10);中央高校基本科研业务费团队项目(ZY20180104)联合资助。

摘　　要：文章用地质力学方法研究了密云水库盆区的控湖构造和构造属性,认为库区存在外围帚状构造体系、华夏系、受限的帚状构造体系3个构造体系和3种拉分成盆活动,燕落盆地是多体系控制的“多因盆地”。通过地貌高程分区,显示存在一个受控于NE向控“盆”断层的NE向第四纪低海拔廊道式地貌,名为“怀柔-密云沉降带”。密云水库库区和燕落盆地属于构造成因湖盆,受限的帚状构造系体系造成“怀柔-密云沉降带”内子盆区差异,密云水库库区和燕落盆地由“断层谷”“微地堑谷”“小地堑谷”3种构造地貌谷地形成一系列“窄道洼陷”后经过部分沉积物注入所成,是“构造成因地貌”控制的“饥饿型沉积盆地”。“怀柔-密云沉降带”内存在的密云穹隆抗剥蚀性形成“遮挡效应”,形成“√”形态盆地剖面并控制了水库库区的沉降中心。To determine the lake-controlling structure and structural properties of Miyun reservoir basin by geomechanical method,three structural systems exist in the reservoir area,namely,the peripheral broom-like structure system,the Cathaysian system,the restricted broom-like structure system,and three kinds of pull-apart basin activities.Through geomorphic elevation zoning,it is shown that there is a NE-oriented quaternary low elevation corridor landform controlled by the NE-controlled"basin"fault,named"Huairou-Miyun subsidence belt".Miyun reservoir area and Yanluo Basin belong to the tectonogenic lake basins,and the limited broom-like structural system causes the differences between sub-basins in the Huairou-Miyun subsidence zone.Miyun reservoir area and Yanluo Basin are formed by a series of narrow channel depressions caused by three types of tectonic landforms:fault valley,micro-graben valley and mini-graben valley.It is a"hungry sedimentary basin"controlled by"tectono-genetic landform".The denudation resistance of miyun dome in the Huairou-Miyun subsidence zone causes a"shield effect",forms a"√"shape basin profile and controls the subsidence center of the reservoir area.

关 键 词：密云水库 “怀柔-密云沉降带” 燕落盆地 构造体系 构造控湖 廊道式地貌 

分 类 号：P61[天文地球—矿床学]