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Cretaceous two stage extensional tectonic in eastern Eurasia continent and its geodynamics
Lin Wei1,2,3; Li JinYan1,2
2021-08-01
Source PublicationACTA PETROLOGICA SINICA
ISSN1000-0569
Volume37Issue:8Pages:2303-2323
AbstractThe Cretaceous tectonics of the North China Craton ( NCC) and its adjacent regions were characterized by a general lithospheric extension and remarked by extensional dome structures. This makes the largest crustal scale extensional tectonic realm in the world. Based on our field and laboratory work, five extensional domains have been delineated, namely Transbaikalia-Mongol-Okhotsk, western part of NCC, eastern part of NCC and Korea, Qinling-Dabie and its neighbouring, and the interior of South China Block (SCB) , respectively. These domains are featured by a NW-SE extensional direction with intensive extensional exhumation of middle to lower crust rocks to the surface along detachment faults. Two stage extension tectonics have been suggested, which took place at ca. 130 similar to 120Ma and ca. 118 similar to 85Ma. The early stage constrains a narrow activity period, and the foundering of the lower part of the lithosphere could be a possible mechanism for this continent-scale extensional tectonics. This geodynamic model could help us to enhance the knowledge of the time, scale, and mechanism of the NCC destruction from the view of structural analysis. The timing of late-stage extensional tectonics is suggested by a lounging trend from the northeast ( Liaodong Peninsula) to the southwest ( Yuechengling massif in SW Hunan Province). The slab roll-back of westward subducted Palaeo- Pacific' or Izanagi plate may lead to this regional extension event.
KeywordTwo stage extensional dome Cretaceous Eastern Eurasia continent Slab Foundering Subduction plate roll back
DOI10.18654/1000-0569/2021.08.04
WOS KeywordMETAMORPHIC CORE COMPLEX ; LATE MESOZOIC EXTENSION ; NORTH CHINA CRATON ; U-PB AGES ; DABIE OROGEN ; POSTCOLLISIONAL GRANITOIDS ; BAIKAL REGION ; LITHOSPHERE ; CONSTRAINTS ; MONGOLIA
Language英语
WOS Research AreaGeology
WOS SubjectGeology
WOS IDWOS:000735639300004
PublisherSCIENCE PRESS
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Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/103963
Collection岩石圈演化国家重点实验室
Corresponding AuthorLin Wei
Affiliation1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
2.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China
3.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
First Author AffilicationState Key Laboratory of Lithospheric Evolution
Corresponding Author AffilicationState Key Laboratory of Lithospheric Evolution
Recommended Citation
GB/T 7714
Lin Wei,Li JinYan. Cretaceous two stage extensional tectonic in eastern Eurasia continent and its geodynamics[J]. ACTA PETROLOGICA SINICA,2021,37(8):2303-2323.
APA Lin Wei,&Li JinYan.(2021).Cretaceous two stage extensional tectonic in eastern Eurasia continent and its geodynamics.ACTA PETROLOGICA SINICA,37(8),2303-2323.
MLA Lin Wei,et al."Cretaceous two stage extensional tectonic in eastern Eurasia continent and its geodynamics".ACTA PETROLOGICA SINICA 37.8(2021):2303-2323.
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