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地层不整合接触是研究地质发展历史及鉴定地壳运动特征和运动时期的重要依据,主褶皱幕是一造山带多幕构造运动中起决定性作用和最为重要的一次构造运动。天山的构造运动幕次多且因地而异,前人认识多有分歧,也没有确立主褶皱幕。伊宁地块伊什基里克山一带上、下石炭统之间为角度不整合接触关系,在岩石组合、沉积环境、古生物地理区系、构造样式、区域大地构造背景等方面差异最为显著,凸显了鄯善运动对区内构造格架和盆山演化起到决定性的作用,因而是主褶皱幕。鄯善运动记录了西天山沟—弧—盆格局消亡,天山残余小洋盆终结,塔里木板块和准噶尔板块最终拼合在一起,形成了统一大陆的重要演化信息。
The unconformity contact is an important basis for studying the history of geological development and identifying the characteristics of crustal movement and movement. The main fold curtain is the most important tectonic movement in a multi-curtain tectonic movement of orogenic belt. Tianshan tectonic movements are numerous and vary from place to place. There are many disagreements in the past, and no main pleat curtain has been established. The Yixiku Block in the area of Ishikilike Mountain and the Lower Carboniferous are in an angle of unconformity and contact. The most significant differences are found in rock assemblage, sedimentary environment, palaeogeography, tectonic style and regional tectonic setting, It highlights that the Shanshan movement played a decisive role in the tectonic framework and the basin-scale evolution in the area and thus is the main fold curtain. The Shanshan Movement recorded the disappearance of the western Tianshan Sag-Arc-basin pattern, the end of the Tianshan remnant small oceanic basins, and finally the assembly of the Tarim Plate and the Junggar Plate together to form an important evolutionary information of the unified continent.