摘要
位于华蓥山复式背斜西翼的两条叠瓦状活动断裂贯穿四川省渠县賨人谷景区内,断层的逆冲作用导致基岩发生垂直错动,沿断层走向线形成数个断层崖,白水溪一段河道也因断裂活动被垂直抬升10m左右,废弃的古河道成为一地下溶洞的洞顶.根据各地貌标志物特征,对断裂产状要素进行了标定,两条断层的走向介于NE25°-NE30°之间,倾向为NW296°-NW301°,倾角为68°-74°.另外,断层崖的形态表明断层活动年代较新,近万年内沿断层仍有比较强烈的逆冲活动.
Two imbricate thrust faults located at the west wing of Huayingshan anticline belt run through Congren valley of Qu county. The obduetion of active faults leads to vertical displacement of bedrock, and several fault scarps along the fault line. Then, the river channel has been risen 10m, and old channel has became the roof of underground karst cavity. Based on the geomorphic marks, the fracture occurrence has been calibrated, the fault＇s strike being 25° ～ 30°,the dip being 296°～301°∠68°～ 74°. The structural style of fault scarps shows that verti- cal movement of the fracture has been going on since 10 000a B. P.
出处
《西华师范大学学报（自然科学版）》
2014年第4期364-368,386,共6页
Journal of China West Normal University(Natural Sciences)
基金
四川省教育厅自然科学重点项目(14ZA0129)
关键词
活动断裂
地貌标志
賨人谷景区
渠县
active faults
geomorphic evidence
Congren valley
Qu county
