塔里木盆地塔中地区上奥陶统台缘带沉积特征

来源期刊:中南大学学报(自然科学版)2015年第8期

论文作者:刘忠宝 沈杰 杨圣彬 云金表 钱一雄 蔡习尧

文章页码:3025 - 3032

关键词:礁滩相;台地边缘;沉积相;良里塔格组;塔里木盆地

Key words:reef flat facies; platform margin; sedimentary facies; Lianglitage formation; Tarim basin

摘    要:通过岩芯观察、薄片鉴定及钻(测)井资料综合分析,对构成礁滩复合体的灰泥丘、骨架礁及台缘滩3种沉积类型进行识别、标定及组合对比分析,从礁、丘、滩组合类型差异的角度,结合古构造(坡度、断裂-裂缝)特征。研究结果表明:塔中地区上奥陶统台缘带礁滩相沉积具有纵向叠置迁移、横向分带及平面环带状分布的特点。其中北坡为镶边型台缘沉积可划分为4个带:丘滩宽缓坡折带、丘滩—礁滩缓坡折带、礁滩陡坡折带和礁滩—丘滩改造陡坡折带;南坡为弱镶边—无镶边台缘沉积可划分为3个带:沉积缓坡折带、断控坡折带和改造陡坡折带。

Abstract: Through the core observation, thin section identification and comprehensive analysis of drilling and log data, three sedimentary types of mud mound, framework reefs and shoal facies on the edge of platform, which composed reef flat deposit, were recognized, calibrated and analyzed from the combination type difference of reef, mound and shoal, combining with paleostructure characteristics(slope, fault and fracture). The results show that the sedimentary of Upper Ordovician reef flat facies developed in platform margin of Tazhong area has the characteristics of longitudinal overlay migration, latitudinal zoning and zonal distribution in the plane. The braiding platform margin deposition in the north slope is divided into 4 belts: wide and gentle slope break of reef bank, gentle slope break of reef bank-reef flat, steep slope break of reef flat and modified steep slope break of reef flat-reef bank. The weak and no braiding platform margin deposition in the south slopen is divided into 3 belts: gentle depositional slope break belt, fault controlled slope break and modified steep slope break.

相关论文

  • 暂无!

相关知识点

  • 暂无!

有色金属在线官网  |   会议  |   在线投稿  |   购买纸书  |   科技图书馆

中南大学出版社 技术支持 版权声明   电话:0731-88830515 88830516   传真:0731-88710482   Email:administrator@cnnmol.com

互联网出版许可证:(署)网出证(京)字第342号   京ICP备17050991号-6      京公网安备11010802042557号