Polyphase deformation of staurolite-bearing metapelite in the Chinese Altai: Recording a Devonian-Permian tectonic regime switch in the southwestern Central Asian Orogenic Belt
文献类型：期刊论文
| 作者 | Miao, Yazhou1,3; Zhang, Jian1,2; Schulmann, Karel3,4; Lexa, Ondrej5; Jerabek, Petr5; Sun, Min2; Jiang, Yingde6 ; Zhang, Shuhui1
|
| 刊名 | JOURNAL OF STRUCTURAL GEOLOGY
 |
| 出版日期 | 2023-09-01 |
| 卷号 | 174页码:19 |
| 关键词 | Chinese Altai Devonian and Permian orogens EBSD inclusion trail analysis Foliation intersection axis analysis |
| ISSN号 | 0191-8141 |
| DOI | 10.1016/j.jsg.2023.104917 |
| 英文摘要 | Recent studies revealed that the Chinese Altai may have experienced two major tectonothermal events in the Devonian and Permian but their mutual relationships remain poorly constrained. In this study, we carried out a comprehensive analysis of macro-and micro-structural features of the Ordovician schists that were subjected to Barrovian-type metamorphism in the Chonghuer area of the northwestern Chinese Altai. Field structural and microstructural analyses revealed that metamorphic foliation S1 was folded by the recumbent fold F2, forming the sub-horizontal foliation S2. The S2 fabric was later reworked by the D3 transpressional shearing along the narrow sillimanite-bearing zone to form the foliation S3. Monazite U-Pb ages obtained from the staurolite schist located close to the D3 shear zone, as well as the zircon U-Pb ages from both folded and unfolded pegmatites that cross-cut granite, indicate that the D3 deformation took place during the Permian period, approximately 257-250 Ma. The EBSD study of quartz in the matrix and staurolite porphyroblasts conducted along the NE-SW cross-section allowed us to: 1) constrain the medium-temperature D2 and high-temperature D3 regimes and, 2) reconstruct foliation intersection axis (FIA) patterns both inside and outside the D3 deformation zone. The FIA between Devonian D1 and D2 preserved in staurolite porphyroblast was initially oriented in a N-S direction, which was ultimately reoriented to a NW-SE direction after undergoing the D3 shear deformation. This result is further reinforced by the numerical stochastic modelling, which quantifies the influence of the Permian HT sinistral transpression on the reworking of the Devonian FIA fabrics. Micro-structural data of this study verifies the significant tectonic switch from the Devonian E-W contraction to the Permian NNW-SSE transpression. Quantitative EBSD-based FIA analysis proves to be an effective approach for the structural analysis of polycyclic orogenic systems. |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001049706100001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/74680]  |
| 专题 | 同位素地球化学国家重点实验室 |
| 通讯作者 | Zhang, Jian; Schulmann, Karel |
| 作者单位 | 1.Sun Yat Sen Univ, Sch Earth Sci & Engn, Guangzhou 510275, Peoples R China 2.Univ Hong Kong, Dept Earth Sci, Pokfulam Rd, Hong Kong, Peoples R China 3.Czech Geol Survey, Ctr Lithospher Res, Prague 1, Czech Republic 4.Univ Strasbourg, Inst Terre & Environm Strasbourg, CNRS, UMR 7063, 1 Rue Blessig, F-67084 Strasbourg, France 5.Charles Univ Prague, Inst Petrol & Struct Geol, Fac Sci, Albertov 6, Prague 2, Czech Republic 6.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Peoples R China |
| 推荐引用方式 GB/T 7714 | Miao, Yazhou,Zhang, Jian,Schulmann, Karel,et al. Polyphase deformation of staurolite-bearing metapelite in the Chinese Altai: Recording a Devonian-Permian tectonic regime switch in the southwestern Central Asian Orogenic Belt[J]. JOURNAL OF STRUCTURAL GEOLOGY,2023,174:19. |
| APA | Miao, Yazhou.,Zhang, Jian.,Schulmann, Karel.,Lexa, Ondrej.,Jerabek, Petr.,...&Zhang, Shuhui.(2023).Polyphase deformation of staurolite-bearing metapelite in the Chinese Altai: Recording a Devonian-Permian tectonic regime switch in the southwestern Central Asian Orogenic Belt.JOURNAL OF STRUCTURAL GEOLOGY,174,19. |
| MLA | Miao, Yazhou,et al."Polyphase deformation of staurolite-bearing metapelite in the Chinese Altai: Recording a Devonian-Permian tectonic regime switch in the southwestern Central Asian Orogenic Belt".JOURNAL OF STRUCTURAL GEOLOGY 174(2023):19. |
入库方式： OAI收割
来源：广州地球化学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。