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DOI | 10.1029/2020GL091624 |
Shear‐wave velocity structure of the southern African upper mantle: Implications for craton structure and plateau uplift | |
A. L. White‐; Gaynor; A. A. Nyblade; R.J. Durrheim; R. Raveloson; Meijde van der; I. M. Fadel; H. Paulssen; M. Kwadiba; O. Ntibinyane; N. Titus; M. Sitali | |
2021-02-16 | |
发表期刊 | Geophysical Research Letters
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出版年 | 2021 |
英文摘要 | We present a 3D shear wave velocity model of the southern African upper mantle developed using 30 to 200 s period Rayleigh waves recorded on regional seismic networks spanning the subcontinent. The model shows high velocities (∼4.7‐4.8 km/s) at depths of 50‐250 km beneath the Archean nucleus and several surrounding Paleoproterozoic and Mesoproterozoic terranes, placing the margin of the greater Kalahari Craton along the southern boundary of the Damara Belt and the eastern boundaries of the Gariep and Namaqua‐Natal belts. At depths > 250 km, there is little difference in velocities beneath the craton and off‐craton regions, suggesting that the cratonic lithosphere extends to depths of about 200‐250 km. Upper mantle velocities beneath uplifted areas of southern Africa are higher than the global average and significantly higher than beneath eastern Africa, indicating there that is little thermal modification of the upper mantle present today beneath the Southern African Plateau. |
领域 | 气候变化 |
URL | 查看原文 |
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/315681 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | A. L. White‐,Gaynor,A. A. Nyblade,等. Shear‐wave velocity structure of the southern African upper mantle: Implications for craton structure and plateau uplift[J]. Geophysical Research Letters,2021. |
APA | A. L. White‐.,Gaynor.,A. A. Nyblade.,R.J. Durrheim.,R. Raveloson.,...&M. Sitali.(2021).Shear‐wave velocity structure of the southern African upper mantle: Implications for craton structure and plateau uplift.Geophysical Research Letters. |
MLA | A. L. White‐,et al."Shear‐wave velocity structure of the southern African upper mantle: Implications for craton structure and plateau uplift".Geophysical Research Letters (2021). |
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