Microstructural and Seismic Characteristics of Mantle Xenoliths From Damaping Area, and Their Geodynamic Implications of North China Craton Destruction
文献类型：期刊论文
| 作者 | Shao, Yilun2; Liu, Cai2; Gao, Rui2,5; Li, Shan1,3,4; Zhao, Tianshuo2 |
| 刊名 | TECTONICS
 |
| 出版日期 | 2025 |
| 卷号 | 44期号:1页码:24 |
| 关键词 | damaping mantle xenoliths CPO transpression seismic anisotropy asthenosphere circulation |
| ISSN号 | 0278-7407 |
| DOI | 10.1029/2024TC008426 |
| 英文摘要 | The large-volume lithospheric mantle xenoliths around the Damaping area provides valuable insights into the detailed destruction progression of the North China Craton (NCC). This paper presents a quantitative analysis of the microstructural and seismic properties of oriented mantle xenoliths (with distinct foliation and lineation). The selected peridotites all have coarse-grained textures. The olivine crystallographic preferred orientations (CPOs) are predominantly axial-[010] type (or AG-type), with all xenoliths have girdled [100]OL and [001]OL characteristics. B-type olivine CPO is newly discovered in the research area. Analysis of crystallographic vorticity axis (CVA) projections indicates that more than half of Damaping xenoliths have CVA maxima (sub)parallel to the lineation. These microstructure characteristics suggest that B-type CPOs were formed before the onset of pure shear-dominated transpression and pyroxene restriction, which significantly influenced the lithospheric mantle evolution. The upwelling asthenosphere beneath Eastern Block of the NCC not only delaminated its lithospheric mantle but also experienced rollback and flowed along the WNW-SEE direction. This progression likely serves as the primary driving force of transpression. If foliation were vertical and lineation were horizontal, the valid S-wave anisotropies range is 5%-12%. All selected samples are spinel facies, resulting in a maximum in situ depth of 90 km, and the calculated SKS splitting delay times (0.5-1.3 s) align with previous seismological observations. The SKS direction in the research area is predominantly oriented perpendicular (NNE-SSW) to the flow direction of nearby asthenosphere. These characteristics are likely attributed to transpression. Therefore, the "fossil" anisotropy may have developed after the cessation of transpression. |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001396460200001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/81863]  |
| 专题 | 中国科学院矿物学与成矿学重点实验室 |
| 通讯作者 | Shao, Yilun |
| 作者单位 | 1.Chinese Acad Sci, CAS Key Lab Mineral & Metallogeny, Guangzhou, Peoples R China 2.Jilin Univ, Coll Geoexplorat Sci & Technol, Changchun, Peoples R China 3.Chinese Acad Sci, Guangzhou Inst Geochem, Guangdong Prov Key Lab Mineral Phys & Mat, Guangzhou, Peoples R China 4.Univ Chinese Acad Sci, Beijing, Peoples R China 5.Sun Yat Sen Univ, Sch Earth Sci & Engn, Guangzhou, Peoples R China |
| 推荐引用方式 GB/T 7714 | Shao, Yilun,Liu, Cai,Gao, Rui,et al. Microstructural and Seismic Characteristics of Mantle Xenoliths From Damaping Area, and Their Geodynamic Implications of North China Craton Destruction[J]. TECTONICS,2025,44(1):24. |
| APA | Shao, Yilun,Liu, Cai,Gao, Rui,Li, Shan,&Zhao, Tianshuo.(2025).Microstructural and Seismic Characteristics of Mantle Xenoliths From Damaping Area, and Their Geodynamic Implications of North China Craton Destruction.TECTONICS,44(1),24. |
| MLA | Shao, Yilun,et al."Microstructural and Seismic Characteristics of Mantle Xenoliths From Damaping Area, and Their Geodynamic Implications of North China Craton Destruction".TECTONICS 44.1(2025):24. |
入库方式： OAI收割
来源：广州地球化学研究所
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