博格达山西缘三葛庄凸起多期构造变形及其对博格达山隆升的响应

三葛庄凸起位于准噶尔盆地东南缘柴窝堡盆地，夹持于博格达构造带与伊连哈比尔尕构造带之间，因其地理位置特殊，三葛庄凸起的构造演化对区域构造的研究有积极作用。通过二维地震资料解释、演化剖面制作,结合前人研究成果，揭示了三葛庄凸起构造特征及演化过程。认为三葛庄凸起的形成经历了多期构造抬升，与前人对博格达山的多期隆升研究有较高的匹配。结果表明:三葛庄凸起经历三期构造运动，受构造运动控制，三葛庄凸起形成三个明显的角度不整合，包括三叠系底部不整合，侏罗系底部不整合以及古近系底部不整合。三葛庄凸起是博格达山向西的延伸段，其演化受到博格达山的控制。晚二叠世博格达山初次隆升，三葛庄凸起随之抬升，造成三叠系底部不整合。受到印支运动的影响，博格达地区晚三叠世又遭受了强烈的挤压运动，在三葛庄凸起表现为三叠系与侏罗系之间的角度不整合。新生代时期博格达山及北天山的持续隆升导致三葛庄凸起南部发生挤压沉降，沉积新生界将博格达山的西段掩盖。

Multi-stage Deformation of The Sangezhuang Uplift in The Western Margin of Bogda Mountain and Its Response To Regional Tectonic Evolution

Sangezhuang uplift is located in the west edge of Chaiwopu basin at the south flank of the Bogda Mountain, sandwiched between Bogda structural belt and Yilianhabilga structural belt. The structural evolution of sangezhuang uplift plays an key role in the study of regional structure evolution and the initial uplift of Bogda Mountain. Combined on the two-dimensional seismic data interpretation, evolution profile production and previous research results, the structural characteristics and evolution process of sangezhuang uplift are revealed. It is considered that the formation of sangezhuang uplift has experienced three multi-stage tectonic uplift, which is highly consistent with previous studies on Bogda mountain. Controlled by the tectonic movement, the sangezhuang uplift formed three obvious angular unconformities, including the unconformity at the bottom of Triassic, the unconformity at the bottom of Jurassic and the unconformity at the bottom of Paleogene. In the Late Permian, the first uplift of Bogda mountain resulted in the subsequent uplift of sangezhuang, which resulted in the unconformity of the bottom of Triassic. Under the influence of Indosinian movement, Bogda area suffered a strong compression movement during Late Triassic, and the angle unconformity between Triassic and Jurassic was shown in sangezhuang uplift. During the Cenozoic, the continuous uplift of Bogda mountain and North Tianshan Mountain resulted in the compression and subsidence of the southern part of sangezhuang uplift, meantwhile the Cenozoic sedimentary covered the western part of Bogda mountain.