西北地区主要含油气盆地大地构造特征  

TECTONIC CHARACTER OF MAIN OIL-BEARING BASIN OF NORTHWEST PART OF CHINA

作　　者：彭作林[1] 郑建京[1] 

机构地区：[1]中国科学院兰州地区研究所,730000

出　　处：《甘肃地质学报》1992年第2期73-84,共12页Acta Geologica Gansu

摘　　要：西北地区主要含油气盆地的形成,是在二叠纪末期大陆地壳拼合基础上,中新生代受印度板块向北俯冲、碰撞远距离效应影响,大陆板内发生的一种构造现象。具有以下特点:1)基底性质及结构不同决定盆地范围大小与沉降幅度。2)盆地形成演化过程中断拗结合与断拗转化特点明显。3)盆内背科构造具有扭动形迹。4)断裂具有正逆转化活动。5)推覆构造与油气形成有一定关系。6)构造旋回晚期往往是生油建造与含煤建造环境,为油气多源、多阶段、多类型提供了良好条件。Main oil-bearing basin of northwest part of Cnina were the result of far distance affect caused by Indian Plate undertrusting to continent plate ,which matched at late Period of Permian. Its character list as following: 1. Sizes and fall extents of basin depend on nature and structure of base. 2. The evolution of basin clearly show character of combining and transforming of fault and down-warping. 3. Anticlines have shear deformation. 4. Faults show character of change of normal fault and reverse fault. 5. There are connection between nappe structure and the formation of oil and gas. 6. Late period of tectonic cycly tend to be good environment for oil-producing formation and coal-bearing formation,it provide good condition for multi-source,multi-stage,multi-type of oil and gas.

关 键 词：含油气盆地 古板块构造 大地构造 西北地区 推覆构造 构造旋回 

分 类 号：P618.130.2[天文地球—矿床学] P544.4[天文地球—地质学]