Metamorphic and chronological constraints on the early Paleozoic tectono-thermal evolution of the Olkhon Terrane, southern Siberia
文献类型：期刊论文
| 作者 | Li, Zhiyong5,6,7,8; Jiang, Yingde6,8 ; Collett, Stephen7; ?típská, Pavla4,7; Schulmann, Karel4,7; Wang, Sheng3; Sukhorukov, Vasiliy1,2
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| 刊名 | JOURNAL OF METAMORPHIC GEOLOGY
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| 出版日期 | 2023 |
| 卷号 | 41期号:4页码:525-556 |
| 关键词 | LA-ICP-MS WESTERN-BAIKAL-REGION ASIAN OROGENIC BELT U-PB COLLISIONAL SYSTEM TRACE-ELEMENT EARLY CALEDONIDES DETRITAL ZIRCONS IGNEOUS ROCKS ISLAND-ARC |
| ISSN号 | 0263-4929 |
| DOI | 10.1111/jmg.12706 |
| 英文摘要 | Terranes accreted to the southeastern margin of the Siberian Craton record an important early Paleozoic tectono-thermal event (known as the Baikal orogenic cycle) in the evolution of the Central Asian Orogenic Belt (CAOB). However, the precise metamorphic conditions and relative timing of this event and its linkage to the wider CAOB remain far poorly constrained. The best exposed of these terranes is the Olkhon Terrane on the western bank of Lake Baikal. Here, late Neoproterozoic through early Paleozoic island arc and back-arc assemblages were metamorphosed to form a thin granulite facies belt cropping out adjacent to the Siberian Craton and lower temperature/pressure paragneiss and migmatite towards the southeast. Phase equilibria modelling suggests that the granulite facies belt preserved moderate pressure (c. 0.80 GPa) and high temperature (up to 900°C) conditions while the paragneiss and migmatites in the southeast have peak metamorphic conditions around 700–770°C at 0.60–0.80 GPa. New geochronological data (zircon U–Pb in granulite and monazite U–Pb in paragneiss/migmatite) in combination with phase equilibria modelling and petro-structural analysis suggest that the tectono-metamorphic evolution of the Olkhon Terrane was controlled by a long-lasting (535–450 Ma) and pervasive thermal anomaly. Discrete maxima in the zircon and monazite U–Pb ages at c. 535, 500, and 450 Ma are linked to different stages of a semi-continuous high-temperature metamorphic evolution. Based on existing geological data of the region, a generalized geodynamic model for the Baikal orogenic cycle involving switching between compressional and extensional regimes during the early Paleozoic accretion of ‘exotic’ CAOB-derived material to the southern margin of Siberia is proposed. The tectono-metamorphic evolution of the Olkhon Terrane may represent a world-class example of polyphase shortening of a long-lived hot intra-continental arc–back-arc system during its collision with cratonic blocks. ? 2022 John Wiley & Sons Ltd. |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000914028000001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/80291]  |
| 专题 | 同位素地球化学国家重点实验室 |
| 作者单位 | 1.Novosibirsk State University, Novosibirsk, Russia 2.V.S. Sobolev Institute of Geology and Mineralogy, Novosibirsk, Russia 3.School of Civil Engineering, Anhui Jianzhu University, Hefei, China 4.Université de Strasbourg, CNRS, IPGS UMR 7516, Strasbourg, France 5.University of Chinese Academy of Sciences, Beijing, China 6.CAS Center for Excellence in Deep Earth Science, Guangzhou, China 7.Centre for Lithospheric Research, Czech Geological Survey, Prague 1, Czech Republic 8.State Key Laboratory of Isotope Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, China |
| 推荐引用方式 GB/T 7714 | Li, Zhiyong,Jiang, Yingde,Collett, Stephen,et al. Metamorphic and chronological constraints on the early Paleozoic tectono-thermal evolution of the Olkhon Terrane, southern Siberia[J]. JOURNAL OF METAMORPHIC GEOLOGY,2023,41(4):525-556. |
| APA | Li, Zhiyong.,Jiang, Yingde.,Collett, Stephen.,?típská, Pavla.,Schulmann, Karel.,...&Sukhorukov, Vasiliy.(2023).Metamorphic and chronological constraints on the early Paleozoic tectono-thermal evolution of the Olkhon Terrane, southern Siberia.JOURNAL OF METAMORPHIC GEOLOGY,41(4),525-556. |
| MLA | Li, Zhiyong,et al."Metamorphic and chronological constraints on the early Paleozoic tectono-thermal evolution of the Olkhon Terrane, southern Siberia".JOURNAL OF METAMORPHIC GEOLOGY 41.4(2023):525-556. |
入库方式： OAI收割
来源：广州地球化学研究所
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