准噶尔盆地西北缘露头区克拉玛依组沉积体系及演化序列分析  

SEDIMENTARY SYSTEM AND EVOLUTION SEQUENCE OF KARAMAY FORMATION IN OUTCROP AREA, NORTHWESTERN MARGIN OF JUNGGAR BASIN

作　　者：刘顺生[1] 焦养泉 朗风江 颜佳新[1] 徐春华 

机构地区：[1]新疆石油管理局勘探开发研究院,克拉玛依834000

出　　处：《新疆石油地质》1999年第6期485-489,共5页Xinjiang Petroleum Geology

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.

关 键 词：准噶尔盆地 沉积相 沉积模式 演化 序列 油田 

分 类 号：P618.130.2[天文地球—矿床学] P512.2[天文地球—地质学]