桃西沟祁家沟组沉积相研究

Study of Sedimentary Facies of Taoxigou Section and Qijiagou Formation

本文依据沉积学,层序地层学的基本方法与理论基础。结合实测剖面资料及前人所做部分成果,在此基础上,分析了新疆大河沿镇桃西沟祁家沟组的沉积相的沉积环境与发展演化,并依据相标志划分出沉积相。在完成研究地区的祁家沟组地层剖面野外实测工作后,推断出桃西沟大部分地层曾经处于海相环境,再进行细微的沉积相划分,可归纳出潮控三角洲到滨浅海沉积亚相。

According to the basic methods and theoretical basis of sequence stratigraphy and sedimentology,combined with the measured profile data and former some achievements.This paper analyzed sedimentary environment evolution of Taoxigou section and Qijiagou formation in Xijiang Uygur Autonomous Region,and the sedimentary facies were divided according to the phase mark.After completed Qijiagou formation stratigraphic section of field survey work of the study area,it was inferred that most of Taoxigou formation was once in the marine facies environment,then the fine sedimentary facies could be divided into tidal dominated delta and neritic sedimentary subfacies.