Lithospheric Structure underneath the Archean Tanzania Craton and Adjacent Regions from a Joint Inversion of Receiver Functions and Rayleigh-Wave Phase Velocity Dispersion
文献类型：期刊论文
| 作者 | Wang, Tuo1,2; Gao, Stephen S.1; Yang, Qiuyue1; Chen, Ling2; Liu, Kelly H.1 |
| 刊名 | SEISMOLOGICAL RESEARCH LETTERS
 |
| 出版日期 | 2022-05-01 |
| 卷号 | 93期号:3页码:1753-1767 |
| ISSN号 | 0895-0695 |
| DOI | 10.1785/0220210296 |
| 英文摘要 | Lithospheric structure beneath the Archean Tanzania craton and adjacent regions, including segments of the East African rift system (EARS) and the Proterozoic-early Paleozoic orogenic belts between the EARS and the craton, is imaged by a joint inversion of receiver functions and Rayleigh wave dispersion measurements derived from ambient seismic noise for shorter periods and teleseismic data for longer periods. Our resulting crustal thickness, crustal V-p/V-s measurements and 3D shear-wave velocity model for the upper 120 km show a clear spatial correspondence with major surficial geological features. The new results suggest the presence of a mafic layer in the bottom of the crust of the entire Archean craton, which is previously only identified beneath the southern portion of the craton. High crustal V-p/V-s values measured in the Rungwe Volcanic Province and most areas of the Kenya and Tanganyika rift segments can be attributed to a combined result of basaltic sediments atop the crust, magmatic intrusion, and crustal partial melting. The Kivu Volcanic Province and parts of the Kenya rift segment are characterized by localized lower-than-normal crustal V-p/V-s values and shear velocities in the lower crust and uppermost mantle, which, given the presence of large volume of CO2 from surficial observations, can be best interpreted by CO2-filled fractures or conduits. Lower-than-normal shear velocities in the uppermost mantle are revealed beneath almost the entire study region with the lowest values found in all the three volcanic provinces. The low velocities are indicative of an underplated layer formed by mantle-derived magmatic materials trapped below the Moho. The relatively low velocities beneath the volcanic provinces might be caused by a higher degree of partial melting in the uppermost mantle. |
| WOS关键词 | LUANGWA RIFT ZONES ; CRUSTAL STRUCTURE ; EASTERN AFRICA ; WESTERN BRANCH ; AMBIENT-NOISE ; STRUCTURE BENEATH ; MANTLE STRUCTURE ; TOMOGRAPHY ; SOUTHERN ; MALAWI |
| 资助项目 | Seismological Facilities for the Advancement of Geoscience (SAGE) Award of the National Science Foundation (NSF)[EAR-1851048] ; U.S. NSF[1009946] ; U.S. NSF[1919789] ; American Chemical Society[PRF-60281-ND8] |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000792402100001 |
| 出版者 | SEISMOLOGICAL SOC AMER |
| 资助机构 | Seismological Facilities for the Advancement of Geoscience (SAGE) Award of the National Science Foundation (NSF) ; Seismological Facilities for the Advancement of Geoscience (SAGE) Award of the National Science Foundation (NSF) ; Seismological Facilities for the Advancement of Geoscience (SAGE) Award of the National Science Foundation (NSF) ; Seismological Facilities for the Advancement of Geoscience (SAGE) Award of the National Science Foundation (NSF) ; U.S. NSF ; U.S. NSF ; U.S. NSF ; U.S. NSF ; American Chemical Society ; American Chemical Society ; American Chemical Society ; American Chemical Society ; Seismological Facilities for the Advancement of Geoscience (SAGE) Award of the National Science Foundation (NSF) ; Seismological Facilities for the Advancement of Geoscience (SAGE) Award of the National Science Foundation (NSF) ; Seismological Facilities for the Advancement of Geoscience (SAGE) Award of the National Science Foundation (NSF) ; Seismological Facilities for the Advancement of Geoscience (SAGE) Award of the National Science Foundation (NSF) ; U.S. NSF ; U.S. NSF ; U.S. NSF ; U.S. NSF ; American Chemical Society ; American Chemical Society ; American Chemical Society ; American Chemical Society ; Seismological Facilities for the Advancement of Geoscience (SAGE) Award of the National Science Foundation (NSF) ; Seismological Facilities for the Advancement of Geoscience (SAGE) Award of the National Science Foundation (NSF) ; Seismological Facilities for the Advancement of Geoscience (SAGE) Award of the National Science Foundation (NSF) ; Seismological Facilities for the Advancement of Geoscience (SAGE) Award of the National Science Foundation (NSF) ; U.S. NSF ; U.S. NSF ; U.S. NSF ; U.S. NSF ; American Chemical Society ; American Chemical Society ; American Chemical Society ; American Chemical Society ; Seismological Facilities for the Advancement of Geoscience (SAGE) Award of the National Science Foundation (NSF) ; Seismological Facilities for the Advancement of Geoscience (SAGE) Award of the National Science Foundation (NSF) ; Seismological Facilities for the Advancement of Geoscience (SAGE) Award of the National Science Foundation (NSF) ; Seismological Facilities for the Advancement of Geoscience (SAGE) Award of the National Science Foundation (NSF) ; U.S. NSF ; U.S. NSF ; U.S. NSF ; U.S. NSF ; American Chemical Society ; American Chemical Society ; American Chemical Society ; American Chemical Society |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/105913]  |
| 专题 | 地质与地球物理研究所_岩石圈演化国家重点实验室 |
| 通讯作者 | Liu, Kelly H. |
| 作者单位 | 1.Missouri Univ Sci & Technol, Geol & Geophys Program, Rolla, MO 65409 USA 2.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Tuo,Gao, Stephen S.,Yang, Qiuyue,et al. Lithospheric Structure underneath the Archean Tanzania Craton and Adjacent Regions from a Joint Inversion of Receiver Functions and Rayleigh-Wave Phase Velocity Dispersion[J]. SEISMOLOGICAL RESEARCH LETTERS,2022,93(3):1753-1767. |
| APA | Wang, Tuo,Gao, Stephen S.,Yang, Qiuyue,Chen, Ling,&Liu, Kelly H..(2022).Lithospheric Structure underneath the Archean Tanzania Craton and Adjacent Regions from a Joint Inversion of Receiver Functions and Rayleigh-Wave Phase Velocity Dispersion.SEISMOLOGICAL RESEARCH LETTERS,93(3),1753-1767. |
| MLA | Wang, Tuo,et al."Lithospheric Structure underneath the Archean Tanzania Craton and Adjacent Regions from a Joint Inversion of Receiver Functions and Rayleigh-Wave Phase Velocity Dispersion".SEISMOLOGICAL RESEARCH LETTERS 93.3(2022):1753-1767. |
入库方式： OAI收割
来源：地质与地球物理研究所
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