中国地质2012，Vol.39Issue(1)：54-63,10.
石西地区八道湾组三段辫状河三角洲的识别与沉积特征研究
The Identification of the braided fluvial delta in the 3rd Member of Badaowan Formation in Shixi area and a study of its sedimentary characteristics
文佳涛 1吴爱成 2但玲玲 3原园 4程文 1樊文阔 2随大伟1
作者信息
- 1. 长江大学地球科学学院,湖北荆州434023
- 2. 长江大学油气资源与勘探技术教育部重点实验室,湖北荆州434023
- 3. 新疆油田公司,勘探开发研究院勘探所,新疆克拉玛依834000
- 4. 中国石油大学(北京)地球科学学院,北京102200
- 折叠
摘要
Abstract
The sedimentary facies of 3rd Member of Lower Jurassic Badaowan Formation in Shixi area of Junggar Basin was previously regarded as meandering river delta. The authors consider it to be the product of tractive current under fairly strong hydrodynamic conditions, as evidenced by the texture, sedimentary structure and distribution characteristics of the sandstone. Its sedimentary environment belongs to the braided fluvial delta. Based on a synthetic study of its sedimentary characteristics, the authors identified 2 subfacies and 5 microfacies in the study area, which include the braided delta distributary channel, braided delta flood plain swamp, braided delta subaqueous distributary channel, tributary bay, and mouth bar. The distribution characteristics and evolution processes of sedimentary facies are inferred as follows: during the early stage the water level fell, the study area developed braided delta front; in the middle stage the water level continued falling, the study area developed braided delta plain; in the late stage the water level rose, and the sediments became thinning. The northwest Halaalate Mountain, Delun Mountain and Zhayier Mountain located in the margin of the study area constituted the main material sources.关键词
辫状河三角洲/曲流河三角洲/沉积特征/沉积演化/石西地区/八道湾组三段Key words
braided fluvial delta/ meandering river delta/ sedimentary characteristics/ depositional evolution/ Shixi area/ 3rd Member of Badaowan Formation分类
天文与地球科学引用本文复制引用
文佳涛,吴爱成,但玲玲,原园,程文,樊文阔,随大伟..石西地区八道湾组三段辫状河三角洲的识别与沉积特征研究[J].中国地质,2012,39(1):54-63,10.
