The northern West Siberian Basin developed tectonic activity during the Triassic period with the development of rift systems and throughout the Mesozoic-Cenozoic era with the formation of numerous local tectonic uplifts. In view of the fact that there is no unified and clear understanding on the formation mechanisms of the geological features, this paper presents a detailed analysis of deep linear structures of the pre-Mesozoic basement, the tectonic evolution of sedimentary cover, the paleogeomorphology, and tectonic activity processes of Yamal-Gyda region. The results reveal that: 1) Deep linear structures can be categorized into four groups of directions, NW, NE, nearly E-W and nearly N-S. The NW and NE linear structures are the structural responses of the folds, thrusts, reverse faults and strike-slip faults of the pre-Mesozoic basement linked to the Ural fold system. The nearly N-S lineaments are clearly identifiable normal faults that mark the western boundary of the Triassic rifting graben. 2) Normal faults (stretching) and anticlines (compression) exhibit identical tectonic orientations. These structures developed sequentially, first through dextral strike-slip faulting in the NW direction and subsequently through sinistral strike-slip faulting in the NE direction. Anticlines formed under the influence of these dual strike-slip movements, with most normal faults developing during the dominant right-lateral phase. 3) The initiation of most uplifts and faults occurred during the Jurassic period, followed by multiple episodes of reactivation of deep linear structures. These tectonic activities are closely linked to Late Cimmerian folding, the collision between the Eurasian Plate and the Indian Plate, as well as widespread regional extensional and rifting processes across the northern part of the Eurasian continent. 4) The majority of uplifts are likely tied to differential vertical movements generated during the activation of deep linear structures. The NE and NNE-trending uplifts and lineaments correlate with folds, reverse faults, and thrust faults associated with the Urals-Novaya Zemlya fold belt, while NW-trending uplifts and lineaments correspond to the dextral strike-slip faults across the Eurasia continent.

为探究西西伯利亚盆地北部三叠纪发育的裂谷以及中生代–新生代发育的大量局部隆起和走滑断裂的形成机理, 对亚马尔–格达地区前中生代基底深部线状构造、沉积盖层构造发育史、古构造地貌及构造活动过程进行详细的分析, 得到以下结果: 1) 深部线状构造可分为NW向、NE向、近EW向和近SN向4组走向, NW和NE走向的线状构造是前中生代乌拉尔褶皱系基底顶部褶皱、逆冲断层、逆断层和走滑断裂的构造响应, 近SN走向的线状构造有明显可识别的正断层, 是三叠纪地堑–裂谷的西部边界; 2) 正断层(拉张)和背斜(挤压)具有相同的走向, 是由先发育NW向右行走滑断裂, 后发育NE向左行走滑断裂的相互运动造成, 两次走滑运动背景下形成背斜, 大多数正断层形成于占主导的右行走滑运动期间; 3) 大多数隆起和断裂于侏罗纪开始发育, 之后经历多期基底深部线状构造活化运动, 与晚基米里期褶皱的形成、欧亚板块与印度板块的碰撞以及欧亚大陆北部广泛的区域拉张作用和裂谷作用相关; 4) 大部分隆起可能与基底深部线状构造活化过程中的差异垂直升降运动相关, NE走向和NNE走向的隆起和线状构造反映乌拉尔–新地褶皱带的褶皱、逆断层和逆掩断层, 而NW走向的隆起和线状构造对应跨欧亚板块的右行走滑断裂。