- 责任者：Sun Changbin (School of Earth Sciences and Resources ; China University of Geosciences ; Beijing 100083 ; China) ; Xie Xinsheng
- 刊名：Earthquake Research in China
- 出版年：2013
- 卷期：29(3)
- 关键词：构造地貌 ; morphostructures ; 边界断层 ; boundary faults ; 山西 ; Shanxi Province
- 页码：p.347-357
- 图表：7 illus., 2 tables, 10 refs.
- 分类号：1400
- issnNo：ISSN1001-4683
- isbnNo：CN11-2008/P
The Luoyunshan piedmont fault is located in west of Linfen basin,controlling the western border of the basin.Based on the fault 1 ∶ 50000 geological mapping,river and gully terraces and piedmont faulted landforms survey,this paper mainly introduces late Quaternary faulted landforms characteristics on the Tumen-Jiazhu village segment of Luoyunshan piedmont fault.The Luoyunshan piedmont alluvial-pluvial fans are divided into three stages,named as alluvial-pluvial fans D1,D2,and D3.The gullies on the upthrown plate of Luoyunshan piedmont fault has five terraces：T1 ～ T5.Alluvial-pluvial fans D1 and terraces T1 and T2 formed in the early and middle Holocene.Alluvial-pluvial fans D2 and terraces T3 formed in the middle-late stage of late Pleistocene.Alluvial-pluvial fans D3 and terraces T4 and T5 formed in the middle-late stage of middle Pleistocene.Faulted landforms characteristics on different parts of the middle segment of the Luoyunshan piedmont fault are different.The dislocation of alluvial-pluvial fans D1 is about 2.9m and 3m respectively in the Xifanggou area and the piedmont of southwest of Yukou village,Jindian town.The dislocation of alluvial-pluvial fans D2 is about 2.5m,4m,6m and 7.7m respectively in the southwest of Puzi village,Tumen town,piedmont of west of Yangjiazhuang village,west of Jingcun village and piedmont of southwest of Langquangou,Xiangling town.The faulted landforms on the Tumen-Jiazhu village segment of Luoyunshan piedmont fault are obvious.The latest activity times of the fault is Holocene.The latest activity times of Tumen segment and Longci segment of the fault are early Holocene and middle-late Holocene respectively.Since the Middle-Late Pleistocene an activity rate of the middle segment of Luoyunshan piedmont fault is 0.18 ～ 0.54mm/a,and activity showed an increasing trend from north to south.Since EarlyMiddle Holocene it is 0.4 ～ 0.9mm/a,and fault activities mainly concentrated on the segment from Xifanggou to Yukou village.There was an increasing trend of the activity rate of the middle segment of Luoyunshan piedmont fault from the Middle-Late Pleistocene to Holocene.It is in good agreement with an increasing trend of the uplift rate of the terraces on the upthrown plate of the fault from the Middle-Late Pleistocene to Holocene and the sedimentation rate of Linfen basin from the Late Pleistocene to Holocene.