干旱区地理2024，Vol.47Issue(4)：576-587,12.DOI:10.12118/j.issn.1000-6060.2023.170
新疆阿克苏温宿大峡谷丹霞地貌特征及成因分析
Features and causes of Danxia landscape in the Wensu Grand Canyon of Aksu,Xinjiang,China
摘要
Abstract
The bedrock of the Danxia landscape is predominantly cemented by calcareous and ferruginous ce-ments;thus,it has special landscape elements and formation mechanisms.It has become an important tourism re-source with much attention because of its high scientific and ornamental values.However,compared with south-east humid areas,little attention has been paid to the characteristics and causes of the Danxia landscape in the ar-id climate of Northwest China.The Wensu Grand Canyon in the Aksu Prefecture of Xinjiang was selected and in-vestigated to explore the characteristics and causes of the Danxia landscape by field investigation,sample micro-scope observations,salt chemistry and element geochemistry experiments,and ArcGIS hypsometry.The results are as follows:(1)The study area is characterized by canyon,peak and peak forest landscapes,well-developed mud flow films along slopes,and cap rock columns.The bedrock comprises red fluvial conglomerates and sand-stones of Neogene age.The hard conglomerate beds are favorable for the formation of cap rock columns.(2)The study area is located near the Wensu salt dome with a high salt content,and the main salt minerals are probably chlorides,nitrates and sulfates,as inferred from the salt experiment.Most of the major elements of sandy debris samples within caverns migrated compared with the surface rock,indicating active chemical weathering in the ar-id climate.(3)The hypsometric integral(HI)shows that the HI value of the southern part of the study area is 0.61,which suggests an early stage.The HI value of the northern part is 0.38,which indicates a late stage.There-fore,the geomorphic evolution and development stages differ in the study area.Although the precipitation in the study area is very low,river erosion is obvious.Tectonism is also considered the main controlling factor of Danx-ia landscape evolution.关键词
丹霞地貌/干旱气候/盐风化/阿克苏Key words
Danxia landscape/arid climate/salt weathering/Aksu引用本文复制引用
张菩,陈留勤,邵崇建,李文,杜丁丁..新疆阿克苏温宿大峡谷丹霞地貌特征及成因分析[J].干旱区地理,2024,47(4):576-587,12.基金项目
国家自然科学基金项目(42361002,41772197) （42361002,41772197）
江西省社科基金"十四五"(2021年)地区项目(21DQ45)资助 （2021年）
