Mesozoic-Cenozoic Exhumation History of the Bogda Range, Eastern Tianshan: Insights from Apatite Fission Track Thermochronology

被引:5
作者
Song, Shida [1 ,2 ]
Li, Jiangang [1 ]
Liu, Xiaoyan [2 ,3 ]
Wang, Yadong [4 ,5 ]
Liang, Wentian [1 ]
Yuan, Sihua [2 ,3 ]
机构
[1] Northwest Univ, State Key Lab Continental Dynam, Xian 710069, Peoples R China
[2] Coll Earth Sci, Inst Disaster Prevent, Sanhe 065201, Peoples R China
[3] Hebei Key Lab Earthquake Dynam, Sanhe 065201, Peoples R China
[4] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Petr Resources, Lanzhou 730000, Peoples R China
[5] Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
基金
中国国家自然科学基金;
关键词
apatite fission track; thermochronology; exhumation history; Bogda; Tianshan; PALEOZOIC TECTONIC EVOLUTION; ASIAN OROGENIC BELT; CHINESE TIEN-SHAN; TURPAN-HAMI BASIN; NORTHWEST CHINA; NW CHINA; ANNEALING KINETICS; THERMAL HISTORY; JUNGGAR; DEFORMATION;
D O I
10.3390/min13010071
中图分类号
P3 [地球物理学]; P59 [地球化学];
学科分类号
0708 ; 070902 ;
摘要
The Bogda Range (hereafter referred to as the Bogda) is located in the Eastern Tianshan. Interpreting its tectono-thermal history is critical to understanding the intra-continental evolution of the Tianshan. In this study, we report new apatite fission track data from the late Paleozoic-Mesozoic sedimentary rocks in the northern Bogda and the Late Paleozoic granites in the southern Bogda to investigate the exhumation history of the Bogda. Apatite fission track ages dominantly range from the Jurassic to earliest Cenozoic (similar to 143-61 Ma), except for one siliciclastic sample from the Early Permian strata with an older age of similar to 251 Ma. Thermal history modeling, together with detrital apatite fission track age peaks, reveal that the Bogda underwent three episodes of cooling during the Late Triassic, the Late Cretaceous, and the Late Miocene. The Late Triassic rapid cooling may represent the initial building of the Bogda, which is probably related to the final closure of the Paleo-Asian Ocean. During the Late Cretaceous, the Bogda may have experienced a moderate exhumation, which was possibly triggered by the extensive tectonic extension in the central-eastern Asian regime during the Cretaceous. The Late Miocene rapid cooling may be a response to the rapid uplift of the whole Tianshan, due to the far-field effect of the continuous India-Eurasia collision since the beginning of the Cenozoic.
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页数:15
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