The concept, characteristics and significance of fluvial fans

• 作者: ZHANG Yuanfu DAI Xin WANG Min LI Xinxin
• 来源期刊: 石油勘探与开发:英文版
• 学科: 地球科学
• 关键词: fluvial fan alluvial fan river distributary fluvial system sedimentary system
• 年，卷（期）: 2020,（5）
• 页码范围: 1014-1026
• 页数: 13页
• 分类号: P512.2

摘要

The concept and characteristics of fluvial fan are elucidated through literature review and case analysis.Firstly,the concept and terminology of fluvial fan are introduced.Secondly,the progress and controversy on the formation mechanism,analysis methods and sedimentary models of fluvial fan are elaborated,and fluvial fan is compared with alluvial fan,river and lacustrine delta.Finally,ten identification signs of the fluvial fan are proposed.It is found through the study that development and scale of fluvial fan are affected by external factors such as climate,tectonic,provenance and wind field.The facies and lithofacies association inside the fan are controlled by the activity of the internal channel.It is pointed that fluvial fans are widely distributed in the world not only today but also in the geological history.The occurrence of fluvial fan will change the traditional continental deposition system dominated by alluvial fan-river-lacustrine.Meanwhile,the research of fluvial fan will be of great significance in the fields of sedimentology and oil and gas exploration.