• 责任者：Li Jianxing (Department of Geological Sciences ; Northwestern University ; Xi’an 710069 ; China) ; Yue Leping
• 刊名：Journal of Stratigraphy
• 出版年：2013
• 卷期：37(1)
• 关键词：构造演化 ; structural evolution ; 沉积演化 ; sedimentary evolution ; 新近纪 ; Neogene Period ; 第四纪 ; Quaternary ; 吕梁山 ; Lvliang Mountains
• 页码：p.93-100
• 图表：illus., 1 table, 29 refs.
• 分类号：1400
• issnNo：ISSN0253-4959
• isbnNo：CN32-1187/P

Fission track dating indicates that the region represented by the modern Ltiliang Mountains and adjacent areas was uplifted rapidly as a block in the early Miocene （23±3 Ma）, , although the Luliang Mountains were not geomorphologically formed at that time. In the late Miocene （about 8 Ma）, the Erdos Basin, Ningwu-Qinshui Basin, and the piedmont zone of the Luliang Mountains ended their long-term denudation history and began to receive Cenozoic sedimentation. Based on stratigraphic data, it is inferred that rapid differential uplifting in the Ltiliang Mountains started 8. 35 ～ 6. 7 Ma and foothill alluvial fan conglomerates （the Luzigou Formation） were deposited, indicating that the Lvliang Mountains were formed geomorphologically. At the same time, the Erdos Basin, which was relatively flat and had not been affected significantly by surface fluvial processes, began to receive eolian deposits （red clays of the Baode Fm）. From the late Miocene to early Pleistocene （6.7～1.8 Ma）, the foothills of the Luliang Mountains （western part） and the Erdos Basin have uplifted slowly and accumulated red clays of the upper Baode Formation and the Jingle Formation as well as loesses and paleosols of the early Pleistocene Wucheng Formation. In the middle part of the early Pleistocene （1. 8 ～ 1. 4 Ma）, due to the uplift of the Liupan Mountains, the western Erdos rose slightly faster than the eastern Erdos, leading present geomorphological pattern （i. e. , western Erdos is higher than eastern Erdos） and the formation of the north-south-trending Shanxi-Shaanxi valley. These geomorphological features also affected the paths of the Yellow River and its tributaries. From the middle Pleistocene to the present, sedimentation was companied with continual uplifting, leading to the final formation of the Loess Plateau in the Erdos basin. The Miocene evolution history of the Qinshui Basin to the east of the Ltiliang Mountains is similar to that of the Erdos Basin. Faulting and subsidence of the Qinshui Basin in the Pliocene and early Pleistocene allowed the accumulation of the Xiatuhe, Xiaobai Dagou, and Mugua formations, whereas eolian deposits of the Jingle and Wucheng formations were deposited in the margin of the basin which continued uplifting. Since the middle Pleisto- cene, faulting and subsidence came to a halt, and the Qinshui Basin has been uplifted as a block.