The Climate Change during 128.11-119.05 Ma Recorded by the Susceptibility of the Sediments of Liupanshan Group

• 责任者：Dai shuang (Key Laboratory of Western China’s Environmental Systems ; Ministry of Education of China ; College of Resources and Environment ; Lanzhou University ; Lanzhou 730000 ; China) ; Huang Yongbo
• 刊名：Earth Science Frontiers
• 出版年：2010
• 卷期：17(3)
• 关键词：早白垩世 ; Lower Cretaceous ; 岩石磁学 ; rock magnetism ; 古气候 ; paleoclimate ; 六盘山 ; Liupan Mountains
• 页码：p.242-249
• 图表：5 illus., 28 refs.
• 分类号：1200
• issnNo：ISSN1005-2321
• isbnNo：CN11-3370/P

In this study, based on the analyses of the sedimentary and susceptibility data of the sediments of the Liupanshan Group exposed in the Liupanshan area (central China), the authors obtained the climate records during 128.15~115.82 Ma from the terrigenous sediments. The susceptibility values are lower totally and can be classified into two segments, i. e. the lower values prior to 125 Ma and the higher values after 125 Ma. The analysis of the sedimentary environment, of the contents of magnetic minerals and the TFe in the rocks, and of their relationship with the susceptibility enhancement suggested that the susceptibility values are predominantly determined by the kinds and the contents of the magnetic minerals from the source region, which indicated that the susceptibility values can be used to interpret the climate change in this time window. The climate during 128.15~115.82 Ma was significantly arid and hot.