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鄂尔多斯盆地西峰油田三叠系延长组浊流沉积及成因模式 预览 被引量:26

Triassic Turbidity Current Deposit and Genetic Model of Yanchang Formation of Xifeng Oilfield, Ordos Basin
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摘要 鄂尔多斯盆地西峰油田三叠系延长组发育典型的浊流沉积体.本文通过对西峰油田延长统野外露头的观察和室内岩心的描述与分析,根据钻井、测井资料,识别出了层状浊积岩、浊流水道、辫状浊流水道.槽状充填浊积岩以及滑塌浊积岩等浊流微相.并基于浊流的两种形成机制(洪水+沉积物→浊流和滑塌沉积物+水→浊流)和沉积动力学原理在该区建立了陆相湖盆浊流沉积模式,即洪水型浊流成因模式和滑塌型浊流成因模式,在此基础上探讨了浊流沉积对构造环境的沉积响应,认为构造背景在宏观上控制了浊积砂体的时空展布,鄂尔多斯盆地该时期的前陆发展演化特征构筑了其浊流沉积地层层序的充填特色. Triassic turbidity current deposits of Yanchang Formation well developed in the Xifeng oilfield, Ordos basin. According to the core,well-logging data and outcrop, efforts are made in this thesis to recognize turbidity current channel,pigtail turbidity current channel,layer turbidity current,trough turbidity current and slump turbidity current from strata. Based on the theory of sediment dynamics and mechanism of genetic of turbidity current, two kinds of genetic models of turbidity current are developed: the genetic model of flood turbidity current and the genetic model of slump turbidity current. Then the relationship between turbidity current deposits and tectonic condition is analyzed. This thesis puts forward suggestion that the tectonic setting controls the mode of space-time exhibition of turbidity current deposits.
作者 卢龙飞 史基安 蔡进功 王金鹏 赵欣 王琪 LU Longfei  SHI Ji'an  CAI Jingong  WANG Jinpeng   ZHAO Xin  WANG Qi 
出处 《地球学报》 EI CAS CSCD 北大核心 2006年第4期 303-309,共7页 Acta Geoscientica Sinica
基金 本文由中国科学院知识创新工程重要方向项目(编号:KZCX3-SW-128)和国家自然科学基金项目(编号:40272065)资助.
关键词 鄂尔多斯盆地 延长统 浊流沉积 成因模式 Ordos Basin Yanchang Formation turbidity current deposit genetic model
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