Early Cretaceous Desert and the Reconstruction of Palaeowind Belts in Gaolan-Baiyin-Jingyuan Area, Gansu Province

详细信息   

• 责任者：Wu Hao (Institute of Geology and Mineral Resources ; China Geological Survey ; Chengdu 610081 ; China) ; Cui Xiaozhuang
• 刊名：Geological Bulletin of China
• 出版年：2011
• 卷期：30(7)
• 关键词：沙漠 ; deserts ; 沉积作用 ; sedimentation ; 甘肃 ; Gansu Province
• 页码：p.1077-1084
• 图表：5 illus., 1 plate, 2 tables, 37 refs.
• 分类号：0803
• issnNo：ISSN1671-2552
• isbnNo：CN11-4648/P

摘要

 
    

Based on previous researches on Early Cretaceous desert of Hekou Group(K1H) in Baiyin-Jingyuan area, the authors made a synthetic comparative analysis of sedimentary texture and structure as well as typical eolian grain surface texture of Hekou Group in Gaolan area, and reached the conclusion that there must also exist desert sediments in Gaolan area. Then, the palaeowind direction and palaeowind belt were reconstructed by systematical measurement of the dips of the eolian dune foresets in the study area. The results indicate that west winds were prevailing during late Early Cretaceous in the study area, being consistent with the palaeowind direction recorded in the Luohandong Formation (K1l) in Ordos Basin.