摘要
塔中低凸起是塔里木盆地隆起带由多级次级构造带组成的大型台背斜构造.奥陶纪海平面多次升降以及晚奥陶世末期抬升剥蚀的作用,使良里塔格组成为该地区沉积范围最为广泛的地层.在对该地区奥陶系层序地层研究的基础上,良里塔格组识别出SQ1和SQ2层序.以体系域为单位,结合多种地质因素和条件,编制良里塔格组层序—岩相古地理图.结果表明,塔中地区奥陶系良里塔格组沉积相带和古地理演化与构造运动和海平面变化密切相关,从塔中中央隆起向北斜坡和南斜坡依次发育碳酸盐陆棚—棚缘—斜坡—混积陆棚—半深海的沉积体系.
The Central Tarim Low Salient is a large platform anticline structure in Tarim Basin Uplift Belt composed of several secondary structural zones.Because of the several times of sea level eustacy in Ordovician and the uplift-erosion in the terminal stage of Late Ordovician Epoch,Lianglitage Formation became the largest sedimentary stratum in this area.Based on the study of Ordovician sequence stratigraphy,Lianglitage Formation should be divided into SQ2 and SQ1.And sequence-based lithofacies-paleogeography map of Lianglitage Formation is made based on system tract under considering geological characteristics and conditions.It is shown that the sedimentary facies zones and the paleogeography evolution of Lianglitage Formation in central Tarim area are associated with tectonic movements and sea-level changes,and that carbonate shelf,shelf margin,slope,mixed sedimentation shelf and bathyal sedimentary systems developed in turn from the Central Tarim Central Uplift to the northern slope and southern slope.
出处
《西安石油大学学报（自然科学版）》
CAS
北大核心
2010年第1期29-34,109-110,共6页
Journal of Xi’an Shiyou University（Natural Science Edition）
基金
中国地调局成都地调中心<中国岩相古地理编图>(编号:[2009]01-12-13)
关键词
塔中低凸起
良里塔格组
层序
岩相古地理
Central Tarim Low Salient
Lianglitage Formation
sequence stratigraphy
lithofacies-paleogeography map
