沉积与特提斯地质2024，Vol.44Issue(2)：351-368,18.DOI:10.19826/j.cnki.1009-3850.2024.04004
塔里木盆地晚奥陶世至侏罗纪不整合面分布特征及成因
Distribution characteristics and genesis of unconformity surfaces from Late Ordovician to Jurassic in Tarim Basin
摘要
Abstract
The study of unconformity holds significant guiding importance for basin evolution,paleogeomorphology reconstruction,and oil and gas exploration.Affected by multiple tectonic activities,various types of unconformities have developed in the Tarim Basin.Through the analysis of seismic profile data,the distribution and structural characteristics of the unconformity surfaces formed during the Late Ordovician to Jurassic period in the Tarim basin are studied,and their tectonic mechanisms are discussed.The results show that:(1)The types of unconformity structures in the Tarim Basin are mainly parallel,truncation,fold,fault-fold,superimposed-overlap,single-overlap,and heterogeneous unconformity.(2)The bottom boundary of the Silurian exhibits the development of fault-fold,fold,truncation,superimposed-overlap,single-overlap,and parallel unconformity,distributed in an east-west belt.There is a development of a wide range of angular unconformity in the middle and south of the basin,a development of parallel unconformity in the middle and north of the Awati-Mangar depression,and a development of a small range of angular unconformity in the Tabei uplift.The Devonian-Carboniferous bottom boundary exhibits the development of parallel,truncation,fault-fold,single-overlap,superimposed-overlap,and heterogeneous unconformity,and the plane distribution has the characteristics of north-south symmetry with the axis of the connection of sedimentary centers in the Northern depression.The bottom boundary unconformity of the Triassic exhibits the development of superimposed-overlap unconformity,low-angle truncation unconformity,and parallel unconformity from north to south,reflecting the closed orogenic movement of the southern Tianshan Ocean in the northern margin of the basin in the late Hercynian.A development of fold,truncation,superimposed overlap,and heterogeneous unconformity exhibits in the bottom boundary of the Jurassic,with the axis-like symmetrical distribution of the sedimentary center line in the Manjiaer-Yingjisu depression.(3)The distribution characteristics of the unconformity surfaces reflect the differences in tectonic movements,the migration and activity of paleouplifts,and the controlling role of unconformity on hydrocarbon accumulation in the basin.关键词
不整合/盆地演化/古地貌/塔里木盆地/古隆起Key words
unconformity/basin evolution/paleogeomorphology/Tarim Basin/paleouplift分类
天文与地球科学引用本文复制引用
李跨越,能源,黄少英,段云江,侯筱晓,胡建宁,付永红,姜帅..塔里木盆地晚奥陶世至侏罗纪不整合面分布特征及成因[J].沉积与特提斯地质,2024,44(2):351-368,18.基金项目
新疆维吾尔自治区自然科学基金项目(2021D01A199) （2021D01A199）
新疆维吾尔自治区高校科研计划项目(XJEDU2019Y072) （XJEDU2019Y072）
新疆维吾尔自治区天山英才计划 （）
