摘要
对新疆焉耆盆地侏罗系的古物源、古气候、古水介质性质及古水深进行了研究,讨论了古环境、沉积相类型及各个沉积时期沉积体系的展布特征及演化规律。焉耆盆地侏罗系主要有冲积扇、扇三角洲、辫状三角洲、碎屑流沟道、滨浅湖、半深湖-深湖和湖岸平原(沼泽)等七种沉积相类型,古气候以温湿型为主,盆地有南北两个物源区,沉积环境为淡水湖泊。主要发育了辫状河-辫状三角洲-湖泊、冲积扇-扇三角洲-湖泊、碎屑流沟道-远源浊积扇及湖岸平原-沼泽等四种类型的沉积体系。
On the basis of studies of source area, palaeoclimate, palaeo-water property and palaeo-water depth, the sedimentary facies and sedimentary systems were discussed. Seven types of sedimentary facies were distinguished from the Jurassic of Yanqi Basin. According to the location and genetic relationship among these facies, four kinds of sedimentary systems were concluded, including braided river, braided delta and lake system, alluvial fan, fan delta and lake system, clastic-flow trench and turbidite fan system and shore-lake plain and swamp system. Further more, the distribution features and evolution of sedimentary systems were described.
出处
《古地理学报》
CAS
CSCD
1999年第3期19-27,共9页
Journal of Palaeogeography：Chinese Edition
关键词
焉耆盆地
侏罗系
沉积
古环境
沉积相
Yanqi Basin, Jurassic, sedimentary facies, sedimentary system
