地质力学学报2026，Vol.32Issue(3)：670-682,13.DOI:10.12090/j.issn.1006-6616.2025177
东天山晚白垩世—新生代构造隆升与地貌演化
Tectonic uplift and geomorphic evolution of the East Tianshan from the Late Cretaceous to the Cenozoic
摘要
Abstract
[Objective]The Tianshan is an intracontinental orogenic belt reactivated in the Cenozoic by far-field effects of the India-Asia collision.Its Cenozoic tectonic evolution is thus key to understanding intracontinental deformation mechanisms.[Methods]Based on stratigraphic sedimentary characteristics and provenance tracing of a section on the northern margin of the Turpan Basin(south of the Bogda Shan),the Late Cretaceous to Cenozoic tectonic and geomorphic evolution of the East Tianshan and its adjacent region has been constrained.[Results]Field investigations reveal that the Paleocene and lower Oligocene strata in this area consist predominantly of red mudstones,indicating a lacustrine environment and stable tectonic conditions.The uppermost Cretaceous and Eocene strata contain relatively thin conglomerate deposits with small clast diameters,suggesting slight tectonic uplift of the Bogda Shan.In contrast,the upper Oligocene to Pliocene strata are composed of extremely thick,coarse conglomerates,reflecting long-term and intense tectonic activity.Detrital zircon U-Pb ages show that,from the Late Cretaceous to the Oligocene,the northern Turpan Basin continuously received detrital material from the West Tianshan,implying low topographic relief of the Bogda Shan during this period.Since the Miocene,however,the Bogda Shan has become the primary sediment source,indicating its rapid tectonic uplift.[Conclusions]In summary,the Bogda Shan remained tectonically stable with low relief during the Late Cretaceous to Oligocene.Since the late Oligocene,it has undergone intense deformation and rapid uplift,becoming the sole provenance area for the northern Turpan Basin.[Significance]This study refines the Cenozoic tectono-geomorphic evolution of the East Tianshan,thereby contributing to a better understanding of the intracontinental deformation processes resulting from the India-Asia collision.关键词
东天山/吐鲁番盆地/新生代/锆石U-Pb/构造地貌Key words
East Tianshan/Turpan Basin/Cenozoic/zircon U-Pb/tectonic geomorphology分类
天文与地球科学引用本文复制引用
景葫芦,王伟涛,刘康,李志刚,张逸鹏,卢乐浚,张培震..东天山晚白垩世—新生代构造隆升与地貌演化[J].地质力学学报,2026,32(3):670-682,13.基金项目
国家自然科学基金项目(42030301,42302237,42572259) This research was financially supported by the National Natural Science Foundation of China(Grant Nos.42030301,42302237,and 42572259). （42030301,42302237,42572259）
