- 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) ; Liu Junwei
- 刊名：Acta Geologica Sinica
- 出版年：2011
- 卷期：85(6)
- 关键词：早白垩世 ; Lower Cretaceous ; 河流沉积物 ; stream sediments ; 甘肃 ; Gansu Province
- 页码：p.1058-1067
- 图表：4 illus., 4 tables, 32 refs.
- 分类号：1200
- issnNo：ISSN0001-5717
- isbnNo：CN11-1951/P
With the increasing research of global Cenozoic climate change, it is imperative to understand the background of climate change prior to the Cenozoic, especially the Cretaceous climate which is characteristic of the "greenhouse Earth" alike present-day’s climate. The Cretaceous climate change has been attracting a magnitude of attention. This study obtained the sequence of color variation of the Lanzhou-Minhe basin during 140.66～124.19 Ma by sampling and color measurement for the red nonmarine sediments from the Lower Hekou Group along the Bapanxia section in the Lanzhou-Minhe Basin. Analysis of the mechanism for color variation shows that Hekou Group is generally one set of red detrital sedimentary rocks assemblage, with the least amount of organic material. The color variation was predominantly controlled by the weathering of the source area and sedimentary environment.