石油与天然气地质 ›› 1995, Vol. 16 ›› Issue (2): 196-201.doi: 10.11743/ogg19950215

• 论文 • 上一篇    下一篇

沙滩子牛轭湖沉积特征

曹跃华, 张春生, 刘忠保, 赖志云   

  1. 江汉石油学院, 湖北荆沙, 434102
  • 收稿日期:1995-02-25 修回日期:1995-03-15 出版日期:1995-06-25 发布日期:2012-01-16
  • 基金项目:

    中国石油天然气总公司资助

SEDIMENTARY CHARACTERISTICS OF BAYOU IN SHATANZI

Cao Yaohua, Zhang Chunsheng, Liu Zhongbao, Lai Zhiyun   

  1. Jianghan Petroleum institute, Jingsha, Hubei
  • Received:1995-02-25 Revised:1995-03-15 Online:1995-06-25 Published:2012-01-16

PDF (PC)

798

被引次数

10

摘要：

曲颈裁弯形成的沙滩子牛轭湖,属开放型沉积体系,经历了四岸崩塌凸岸堆积及裁弯形成两个阶段。出水口和入水口是主要沉积部位,沉积速率2～3m/a,顶湾则沉积相当缓慢；粒度曲线第Ⅰ类代表早期、第Ⅱ类代表早中期、第Ⅲ类代表中晚期沉积物的粒度特征；以发育中、小型水平、平行、波状等层理和泥裂为主。

关键词: 牛轭湖, 现代沉积, 形成模式, 曲颈裁弯

Abstract:

Shatanzi bayou,formed of "Ω"-shape river cove, is an open sedimentary system.The bayou underwent concave bank collapse,covex bank cumulation and cut-cove bar forming stages.Water inlet and outlet are the main positionsof deposition.The deposit rate is 2-3m per year,but that of the apex of the cove is considerably slow.As for grain size curves,type-Ⅰ represents the grain size of the early stage sediments;type-Ⅱ represents the grain size of the early to middle stage sediments and type-Ⅲ shows that of middle to late sediments.Small or medium size of horizontal,parallel and wave bedding and mud cracks developed in the bayou.