Peri-Siberian Ordovician to Devonian Tectonic Switching in the Olkhon Terrane (Southern Siberia): Structural and Geochronological Constraints
文献类型：期刊论文
| 作者 | Li, Zhi-Yong1,2,3,8; Jiang, Ying-De1,3; Collett, Stephen2; Stipska, Pavla2; Schulmann, Karel2,7; Wang, Sheng6; Sukhorukov, Vasiliy4; Bai, Xiu-Juan5; Zhang, Wan-Feng1,3,8 |
| 刊名 | TECTONICS
 |
| 出版日期 | 2023-10-01 |
| 卷号 | 42期号:10页码:33 |
| 关键词 | petro-structural analysis multi-chronometric dating shortening-extension lateral extrusion SE Siberia Central Asian Orogenic Belt |
| ISSN号 | 0278-7407 |
| DOI | 10.1029/2023TC007826 |
| 英文摘要 | The Olkhon Terrane is thought to preserve a record of the initial collision of the Siberian Craton with its peripheral orogenic system during the early Paleozoic. However, the related tectono-metamorphic process and its time-scale remain obscure. To address this issue, new structural observations combined with U-Pb zircon and monazite and 40Ar/39Ar biotite geochronology were conducted in the migmatitic-granitic Anga-Sakhurta Zone of the terrane. An earliest syn-collisional event associated with the development of a c. 500-480 Ma sub-horizontal migmatitic fabric is confirmed. This early fabric was affected by later extensional doming in association with emplacement of partial melts (in terms of c. 470-445 Ma granite sills) parallel to the sub-horizontal mechanical anisotropy. Subsequent upright folding leading to amplification of extensional domal structures and heterogeneous vertical transposition of composite horizontal fabric occurred soon after the doming, as indicated by intrusions of residual melts into the axial planes of the upright folds. The latest episode of deformation was marked by development of greenschist-facies sinistral shear zones surrounding the Anga-Sakhurta Zone at c. 420-400 Ma. An updated tectonic model involving (a) Middle-Late Ordovician crustal thinning associated with horizontal crustal flow, (b) Silurian crustal shortening related to northwards movement of Cambrian magmatic arc of the Birkhin Complex to the south, and (c) Early Devonian lateral extrusion and sinistral shearing associated with progression of the Birkhin Complex promontory, is proposed. Results from this study shed lights on the collisional evolution of peri-Siberian orogenic system during the early stage evolution of the Central Asian Orogenic Belt. The Olkhon Terrane underwent Cambrian-Silurian shortening-extension cycles and Devonian lateral extrusion and shearingCambrian to Devonian tectonic switches in the Olkhon Terrane mark the collisional evolution of peri-Siberian orogenic systemGeodynamic evolution of the Olkhon Terrane closely matches to that of central segment of the Mongolian Collage |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001072678600001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/74816]  |
| 专题 | 同位素地球化学国家重点实验室 |
| 通讯作者 | Jiang, Ying-De |
| 作者单位 | 1.CAS Ctr Excellence Deep Earth Sci, Guangzhou, Peoples R China 2.Czech Geol Survey, Ctr Lithospher Res, Prague, Czech Republic 3.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou, Peoples R China 4.VS Sobolev Inst Geol & Mineral SB RAS, Novosibirsk, Russia 5.China Univ Geosci, Key Lab Tecton & Petr Resources, Minist Educ, Wuhan, Peoples R China 6.Anhui Jianzhu Univ, Sch Civil Engn, Hefei, Peoples R China 7.Univ Strasbourg, CNRS, UMR 7063, ITES, Strasbourg, France 8.Univ Chinese Acad Sci, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Zhi-Yong,Jiang, Ying-De,Collett, Stephen,et al. Peri-Siberian Ordovician to Devonian Tectonic Switching in the Olkhon Terrane (Southern Siberia): Structural and Geochronological Constraints[J]. TECTONICS,2023,42(10):33. |
| APA | Li, Zhi-Yong.,Jiang, Ying-De.,Collett, Stephen.,Stipska, Pavla.,Schulmann, Karel.,...&Zhang, Wan-Feng.(2023).Peri-Siberian Ordovician to Devonian Tectonic Switching in the Olkhon Terrane (Southern Siberia): Structural and Geochronological Constraints.TECTONICS,42(10),33. |
| MLA | Li, Zhi-Yong,et al."Peri-Siberian Ordovician to Devonian Tectonic Switching in the Olkhon Terrane (Southern Siberia): Structural and Geochronological Constraints".TECTONICS 42.10(2023):33. |
入库方式： OAI收割
来源：广州地球化学研究所
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