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Mesozoic and Cenozoic exhumation history and magmatic-hydrothermal events of the central Tianshan Mt. Range, NW China: Evidence from (U-Th)/He and Ar-40/Ar-39 dating
Zhao, Shuangfeng1; Chen, Wen1; Zhang, Bin2; Sun, Jingbo1; Shen, Ze1; Zhang, Yan1,3
2020-06-01
Source PublicationJOURNAL OF ASIAN EARTH SCIENCES
ISSN1367-9120
Volume194Pages:15
AbstractThe thermal history of rocks in the Awulale area, central Chinese Tianshan, is significant to understanding the formation and tectonothermal evolution of the Tianshan orogen. K-feldspar Ar-40/Ar-39 and apatite (U-Th)/He age data reveal at least four Mesozoic Cenozoic tectonothermal events in the central Tianshan, which occurred during the Middle-Late Triassic (244.4-216.5 Ma), Early Jurassic (ca. 180.3 Ma), Early Cretaceous (99.1-98.1 Ma), and early Miocene (18.6-13.7 Ma). This thermal history is consistent with that throughout the Tianshan orogenic belt and surrounding blocks. Modeling of the thermal history shows that intrusive rocks in the central Tianshan have experienced four stages of cooling in the Mesozoic Cenozoic. Stage I occurred from ca. 310 to 230 Ma, after magma emplacement, and resulted in cooling to the 40Ar/39Ar closure temperature of K-feldspar (200-180 degrees C). During this time, tectonism in the central Tianshan was not intense and the rapid cooling was due mainly to thermal exchange, with a maximum cooling rate of similar to 7.1 degrees C/Myr. Stage II occurred from ca. 230 to 180 Ma. Collision between the Qiangtang microcontinent and the Eurasia continental margin resulted in active tectonism in the central Tianshan, and cooling was caused mainly by tectonic uplift, with the maximum uplift of intrusive rocks exceeding 9 km. Stage III occurred from ca. 180 to 45 Ma, when regional tectonism was weak and cooling was gradual. During this stage, the apatites in the syenite-porphyry remained in the He partial retention zone for a long time. This indicates that during this stage the central Tianshan was only weakly influenced by the far-field collisions of Lassa and Karakoram Pamir with the southern margin of Eurasia. Stage IV occurred from 45 Ma to the present-day, and was related to the far-field influence of the middle late Himalayan Orogeny, during which tectonism in the central Tianshan became more intense. In this final stage, many types of intrusive rock were exhumed to the surface, with the maximum uplift exceeding 2 km. Furthermore, the cooling history and regional structural trends indicate that since the Mesozoic, under the influence of tectonic compression, there has been differential uplift on the northern and southern sides of the east Awulale area. The cooling and exhumation rates of intrusive rocks are much higher on the northern side of the area than the southern side. This was related to reverse movement on the Yuximolegai Fault, as exhumation rate of the hanging wall (northern region) was higher than that of the footwall (southern region) under N-S compression. These findings, combined with the inversion model results, indicate that this differential uplift occurred mainly from the Late Triassic to Early Jurassic.
KeywordCentral Tianshan Awulale igneous belt Thermal modeling Exhumation history Ar-40/Ar-39 dating (U-Th)/He dating
DOI10.1016/j.jseaes.2019.104057
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Geological Sciences Research Fund ; Chinese Academy of Geological Sciences Research Fund ; China Geological Survey ; China Geological Survey ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Geological Sciences Research Fund ; Chinese Academy of Geological Sciences Research Fund ; China Geological Survey ; China Geological Survey ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Geological Sciences Research Fund ; Chinese Academy of Geological Sciences Research Fund ; China Geological Survey ; China Geological Survey ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Geological Sciences Research Fund ; Chinese Academy of Geological Sciences Research Fund ; China Geological Survey ; China Geological Survey
WOS KeywordPALEOZOIC TECTONIC EVOLUTION ; ASIAN OROGENIC BELT ; A-TYPE GRANITES ; LOW-TEMPERATURE THERMOCHRONOMETRY ; HELIUM DIFFUSION KINETICS ; TIEN-SHAN ; RADIATION-DAMAGE ; TARIM BASIN ; EASTERN TIANSHAN ; CONTINENTAL GROWTH
Language英语
Funding ProjectNational Natural Science Foundation of China[41773046] ; National Natural Science Foundation of China[41688103] ; National Natural Science Foundation of China[41473053] ; National Natural Science Foundation of China[41503057] ; Chinese Academy of Geological Sciences Research Fund[YYWF201707] ; China Geological Survey[DD20190004] ; China Geological Survey[DD20190001]
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Geological Sciences Research Fund ; Chinese Academy of Geological Sciences Research Fund ; China Geological Survey ; China Geological Survey ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Geological Sciences Research Fund ; Chinese Academy of Geological Sciences Research Fund ; China Geological Survey ; China Geological Survey ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Geological Sciences Research Fund ; Chinese Academy of Geological Sciences Research Fund ; China Geological Survey ; China Geological Survey ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Geological Sciences Research Fund ; Chinese Academy of Geological Sciences Research Fund ; China Geological Survey ; China Geological Survey
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000538820400017
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/96907
Collection其他部门
Corresponding AuthorChen, Wen
Affiliation1.Chinese Acad Geol Sci, Inst Geol, Lab Isotope Thermochronol, Key Lab Deep Earth Dynam,Minist Nat Resources, Beijing 100037, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
3.China Met Geol Bur, Inst Mineral Resources Res, Beijing 101300, Peoples R China
Recommended Citation
GB/T 7714
Zhao, Shuangfeng,Chen, Wen,Zhang, Bin,et al. Mesozoic and Cenozoic exhumation history and magmatic-hydrothermal events of the central Tianshan Mt. Range, NW China: Evidence from (U-Th)/He and Ar-40/Ar-39 dating[J]. JOURNAL OF ASIAN EARTH SCIENCES,2020,194:15.
APA Zhao, Shuangfeng,Chen, Wen,Zhang, Bin,Sun, Jingbo,Shen, Ze,&Zhang, Yan.(2020).Mesozoic and Cenozoic exhumation history and magmatic-hydrothermal events of the central Tianshan Mt. Range, NW China: Evidence from (U-Th)/He and Ar-40/Ar-39 dating.JOURNAL OF ASIAN EARTH SCIENCES,194,15.
MLA Zhao, Shuangfeng,et al."Mesozoic and Cenozoic exhumation history and magmatic-hydrothermal events of the central Tianshan Mt. Range, NW China: Evidence from (U-Th)/He and Ar-40/Ar-39 dating".JOURNAL OF ASIAN EARTH SCIENCES 194(2020):15.
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