Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017GL075485 |
Receiver Function Imaging of Mantle Transition Zone Discontinuities Beneath the Tanzania Craton and Adjacent Segments of the East African Rift System | |
Sun, Muchen1,2; Liu, Kelly H.2; Fu, Xiaofei1; Gao, Stephen S.2 | |
2017-12-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:24 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; USA |
英文摘要 | The mantle transition zone (MTZ) discontinuities beneath the Tanzania Craton and the Eastern and Western Branches of the East African Rift System are imaged by stacking over 7,100 receiver functions. The mean thickness of the MTZ beneath the Western Branch and Tanzania Craton is about 252 km, which is comparable to the global average and is inconsistent with the existence of present-day thermal upwelling originating from the lower mantle. In contrast, beneath the Eastern Branch, an up to 30 km thinning of the MTZ is observed and is attributable to upwelling of higher temperature materials from either the upper MTZ or the lower mantle. The observations are in agreement with the hypothesis that rifting in Africa is primarily driven by gradients of gravitational potential energy and lateral variations of basal traction force along zones of significant changes of lithospheric thickness such as the edges of the Tanzania Craton. |
英文关键词 | East African Rift System mantle transition zone mantle plume receiver function continental rifting |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000422954700013 |
WOS关键词 | WAVE VELOCITY STRUCTURE ; SEISMIC ANISOTROPY ; THICK LITHOSPHERE ; WESTERN BRANCH ; SOUTH-AMERICA ; TOPOGRAPHY ; PLUME ; DEEP ; TEMPERATURE ; BOUNDARY |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/29128 |
专题 | 气候变化 |
作者单位 | 1.Northeast Petr Univ, Inst Unconvent Oil & Gas, Coll Earth Sci & Res, Daqing, Peoples R China; 2.Missouri Univ Sci & Technol, Geol & Geophys Program, Rolla, MO USA |
推荐引用方式 GB/T 7714 | Sun, Muchen,Liu, Kelly H.,Fu, Xiaofei,et al. Receiver Function Imaging of Mantle Transition Zone Discontinuities Beneath the Tanzania Craton and Adjacent Segments of the East African Rift System[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(24). |
APA | Sun, Muchen,Liu, Kelly H.,Fu, Xiaofei,&Gao, Stephen S..(2017).Receiver Function Imaging of Mantle Transition Zone Discontinuities Beneath the Tanzania Craton and Adjacent Segments of the East African Rift System.GEOPHYSICAL RESEARCH LETTERS,44(24). |
MLA | Sun, Muchen,et al."Receiver Function Imaging of Mantle Transition Zone Discontinuities Beneath the Tanzania Craton and Adjacent Segments of the East African Rift System".GEOPHYSICAL RESEARCH LETTERS 44.24(2017). |
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