Quaternary Tectonic-Sedimentary Characteristics and Environmental Evolution of Anxiang Sag in Dongting Basin and Its West Periphery

• 责任者：Bai Daoyuan (Hunan Institute of Geological Survey ; Changsha 410011 ; China) ; Li Chang’an
• 刊名：Journal of Earth Sciences and Environment
• 出版年：2010
• 卷期：32(2)
• 关键词：第四纪 ; Quaternary ; 沉积环境 ; sedimentary environment ; 构造演化 ; structural evolution ; 洞庭湖盆地 ; Dongtinghu Basin
• 页码：p.120-129
• 图表：6 illus., 1 table, 48 refs.
• 分类号：1400
• issnNo：ISSN1672-6561
• isbnNo：CN61-1423/P

Detailed geologic mapping and bore data was conducted to study on the Quaternary tectonic and sedimentary characteristics and environmental evolution of Anxiang Sag and its west periphery of Dongting Basin, which provided new materials for Quaternary geology of Jianghan-Dongting Basin. The sag trends north-south direction and is surrounded by normal faults. The thickness of Quaternary deposits in the sag is commonly 100~220 m with maximun thickness of 300 m, and from lower to upper, the Quaternary strata is composed of Early Pleistocene Huatian Formation and Miluo Formation, Middle Pleistocene Dongtinghu Formation,Late Pleistocene Potou Formation and Holocene lacustrine-alluvial deposits. Based on geomorphologic, sedimentary and sag-controling fault characteristics, evolution of the Quaternary tectonic and environment of the study area is defined.