滹沱河水系形成问题的新探讨  

A new probe to the through cutting of the Hutuo river drainage

作　　者：吴利杰 WU Lijie(State Key Laboratory for Continental Dynamics,Department of Geology,Northwest University,Xi’an 710069;Key Laboratory of Quaternary Chronology and Hydro-Environmental Evolution,Chinese Academy of Geological Sciences,Xiamen 361009,China)

机构地区：[1]西北大学地质学系,大陆动力学国家重点实验室,西安710069 [2]中国地质科学院第四纪年代学与水文环境演变重点实验室,厦门361009

出　　处：《干旱区资源与环境》2022年第12期64-71,共8页Journal of Arid Land Resources and Environment

基　　金：中国地质调查局地质科学调查项目(DD20160238)资助。

摘　　要：通过将滹沱河流域的断陷湖盆、峡谷、河流及山前冲洪积扇作为一个统一的自然地理系统,从构造地貌与沉积响应两个方面进行综合分析,对滹沱河上游水系“袭夺”问题及其最终形成年代等问题进行了探讨。研究表明:石岭关风口为中新世-上新世之交(>5.20Ma)一条纵贯山西中部(忻定-太原)地堑谷的古河谷遗迹。约5.20Ma石岭关断块隆起,忻定、太原两个相对独立演化的山间断陷盆地初具雏形。滹沱河彻底贯通太行山流入华北平原,形成一个独立的水系格架的时间厘定为第四纪初期(2.58-2.12Ma),新构造运动应是滹沱河形成的主要驱动力。滹沱河形成后未经石岭关南流进入太原盆地而与汾河水系沟通,其“袭夺”问题的争论可以休止。The basin fault-depression lake basin,valleys,rivers,and piedmont alluvial fan of the Hutuo river are thoroughly analyzed as a unified physical geographical system,and the final formation age of the Hutuo river and its related controversial issues are summarized from two aspects of tectonic geomorphology and sedimentary response.The following are the main conclusions.The Shilingguan pass is a relic of a paleochannel that once cut through the Central Shanxi(Xinding-Taiyuan)Rift Valley around the turn of Miocene and Pliocene(>5.20 Ma).The Xinding and Taiyuan basins,two relatively independent intermountain faulted basins,had taken shape at 5.20 Ma as a result of the Shilingguan uplift.The Hutuo river completely had run through the Taihang Mountains,and flowed into the North China Plain during the early Quaternary(2.58-2.12 Ma).The regional Neotectonic movement is the main driving force for the formation of the Hutuo river.The debate about river capture of the Hutuo river can be ended because it does not flow southward into the Taiyuan basin and connect with the Fenhe river system.

关 键 词：滹沱河 忻定盆地 滹沱河冲洪积扇 河流袭夺 新构造运动 

分 类 号：P343.1[天文地球—水文科学]