摘要
通过对准噶尔盆地西北缘露头中三叠统克拉玛依组五个砂层组的精细描述，认为大面积出器的S_4-S_1；砂层组属于上克拉玛依组，分布较为局限的S_5砂层组属于下克拉玛依组，其沉积早期受发育于盆地基底和逆冲推覆体之上的、垂直于加依尔山的深切谷控制，而沉积晚期深切谷逐渐被填平补齐之后形成超覆。从下到上可划分为五种沉积体系：即冲积扇沉积体系、扇前湿地与低弯度河沉积体系、冲积-湖泊三角洲沉积体系、湖泊沉积体系和湖泊辫状三角洲沉积体系。
Based on detailed description of five sand layers in Middle Triassic in outcrop area, northwestem margin of Junggar basin, it is considered that S_4-S_1, sand layers of upper Karamay formation were extensively distributed, and S_5 sand layer of lower Karamay formation locally distributed. Sedimentation of Karamay formation was controlled by deep valley which developed on basin basement and overthrust nappe and is perpendicular to Jiayier Mts in eary period, and the deep valley was filled to form overlap in late period. Five sedimentary systems can be divided from bottom to top, they are alluvial fan system, frontal fan wetland and slack meandering river system, alluvial-lake delta system, lake and braided delta ones.
出处
《新疆石油地质》
CAS
CSCD
1999年第6期485-489,共5页
Xinjiang Petroleum Geology
关键词
准噶尔盆地
沉积相
沉积模式
演化
序列
油田
<Keywrods> Karamay outcrop Middle Triassic Sedimentary facies Sedimentary mode Evolution Sequence
