准噶尔盆地西北缘二叠系佳木河组层序发育演化特征  

The Pattern of Sedimentary Evolution and Characteristics of Sequence Framework in Jiamuhe Stratum in Five and Eight Areas of Junggar Basin

作　　者：李德武[1] 张艳会[2] 祝彦贺[3] 

机构地区：[1]大庆油田有限责任公司勘探开发研究院 [2]大庆油田有限责任公司地质录井分公司,黑龙江大庆163441 [3]中国石油大学(北京)资源与信息学院,北京102249

出　　处：《内蒙古石油化工》2008年第14期54-57,共4页Inner Mongolia Petrochemical Industry

基　　金：国家自然科学基金项目(No.40272057);国家重点基础研究发展规划"973"项目(G19990433)

摘　　要：准噶尔盆地西北缘前陆冲断带二叠系佳木河组由火山岩、火山碎屑岩、碎屑岩组成,岩性复杂,彼此叠置。文中探讨了这种混合地层的层序划分方法,通过应用井震结合的桥式对比以及大量岩心的观察,确定了火山岩、碎屑岩都是史密斯地层,区域性的不整合面控制地层的发育,事件性的火山活动只是短期的活动,在地震上可以在三级层序格架内追踪对比。靠近前陆冲断带处发育斜坡带,从冲断带到盆地内,三级层序在斜坡上带厚,以火山岩为主,下带薄,以碎屑岩为主,并且在火山活动期,靠近断裂处以火山岩为主,火山静止期,以碎屑岩为主。In the foreland thrust belt of northwestern margin of the Junggar Basin, the lava, lava clastic and clastic locks were all parts of Jiamuhe stratum in Permian of the areas. Different rocks are mixing and we researched this type of complex stratum. Through lots of cores viewed and synthetic made we thought mixing strata is Smith stratum; area unconformated surface controll the development of three--order sequence. The volcano action is short and we can tract the sequence boundary in the seismic section. Meanwhile, there is a slope between thrust belt and basin forward~ upper is full of thick lava and lava elastic, lower is full of thin elastic rocks. During the period of volcano action, close to fault belt lava developed mainly and in stable period sequence showed elastic rocks.

关 键 词：层序特征 发育演化 佳木河组 准噶尔盆地西北缘 

分 类 号：P618.130.2[天文地球—矿床学] P539.2[天文地球—地质学]