摘要
沙埝断块区是由多个分散、破碎断块组成的复杂断块群.综合分析地质和地球物理资料,认为该区断裂构造发育,阜宁组整体呈现鼻状构造,且是断层的集中发育层,断层弧形弯曲、伴有分支,断块圈闭发育.依据典型的构造演化剖面及伸展量、伸展率和百万年内断层落差将其在新生代期间的构造演化划分为阜宁期断块形成、戴南期断层休眠、三垛期断层再次活动以及新近纪和第四纪构造稳定4个阶段,认为该区新生代构造活动强弱交替,断层活动性差异明显,阜宁期断层活动规模和活动强度最大,新生代持续南降北升,有利于聚集来自南部内斜坡的油气形成油气藏,断块圈闭定型于阜宁期末.
The Shanian block area is composed of several dispersed and broken blocks.Based on analysis of geological and geophysical data,it is held that faulted structures are developed in this area.Funing Formation presents a nosing structure,and there are the centralized growth of faults The faults present curved arc shape with branches and the traps in the fault block are developed.According to the typical balanced profile,extension values,extensional rate and fault throw per million years,the tectonic evolution of the area in Cenozoic era can be divided into four periods:Funing period-the forming period of the faults,Dainan period-the resting period of the faults,Sanduo period-the active period once again of the faults,and the stable period of the structure in Neogene and Quaternary.It is held that there is the alternation of strong with weak activities in Cenozoic.There is obvious difference in the activity of the faults:the scale and intensity of the fault activity are the largest.It sustains down in south and up in north in Cenozoic,which is favorable to accumulate the hydrocarbon from the southern internal slope.The traps in the fault block are fixed in the end of Funing period.
出处
《西安石油大学学报（自然科学版）》
CAS
北大核心
2009年第2期43-46,50,共5页
Journal of Xi’an Shiyou University（Natural Science Edition）
关键词
沙埝地区
阜宁组
断块圈闭
平衡剖面
伸展率
断层落差
构造分析
Shanian area
Funing Formation
fault block trap
balanced profile
extensional rate
fault throw
structural analysis
作者简介
王霞田（1982-），女，博士研究生，主要从事盆地构造解析研究．
