北大港潜山在沙三段沉积期的隆升状态及其对沉积物源的供给  

Uplift and Erosion of the Beidagang Buried-hill During the Deposition of the Third Member of the Shahejie Formation

作　　者：石万忠[1] 王振升[2] 宋志峰[1] 马建英[2] 陆永潮[1] 刘国全[2] 

机构地区：[1]中国地质大学(武汉)构造与油气资源教育部重点实验室/资源学院,湖北武汉430074 [2]中国石油大港油田分公司勘探开发研究院,天津300280

出　　处：《大地构造与成矿学》2010年第4期512-519,共8页Geotectonica et Metallogenia

基　　金：国家自然科学基金项目(No.40602015);中国石油天然气股份有限公司重大专项课题(No:2008E-0601)联合资助

摘　　要：北大港潜山构造带的高点区无沙三段沉积,依照地层终止方式无法厘定出北大港潜山的高点区是在沙三段沉积期一直暴露地表没有接受沉积,还是在沙三段沉积期接受了沉积,后被晚期构造抬升剥蚀殆尽。确定北大港潜山高点区在沙三段沉积期的演化状态对于分析本区沉积体系及储层分布至关重要。本文以构造与沉积的响应关系为分析的思路和依据,通过地层厚度图的框架约束,基于砾岩分布和泥岩颜色所指示的古环境、古地貌、古物源的特征,分析出北大港潜山高点区在沙三段沉积期一直是一个稳定的物源区,其剥蚀下来的物源通过构造转换带的控制,沉积在板桥凹陷和岐口凹陷。The lack of the third member of the Shahejie Formation on the top of the Beidagang buried-hill might arise either from having not received sediment during the Es3 or denudation caused by the later structural uplift.However,the evolution of the Beidagang buried-hill during the Es3 is critical for depositional system and reservoir analyses.So the evolution of the Beidagang buried-hill is analyzed on the basis of the sequence thickness,mudstone color and conglomerate distribution.Two conclusions were drawn：1） the top area of the Beidagang duriedhill received no sediment during the Es3;on the contrary,2） the denudation of the Beidagang buried-hill during the Es3 served part of the provenance of the Banqiao and Qikou sags via the transfer zone.

关 键 词：物源 构造演化 构造应力转换带 北大港潜山 

分 类 号：P542[天文地球—构造地质学] P618.13[天文地球—地质学]