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| Titel |
First arrival time tomography for a near vertical reflection seismic profile in the Kaokoland region in Northern Namibia - first results |
| VerfasserIn |
Benjamin Braeuer, Trond Ryberg, Christian Haberland, Klaus Bauer, Michael Weber |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250098296
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| Publikation (Nr.) |
 EGU/EGU2014-13962.pdf |
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| Zusammenfassung |
| Within the LISPWAL project (part of the SAMPLE SPP), in 2012 a Near Vertical Reflection (NVR) Seismic profile was generated in the Kaokoland region in Northern Namibia. 150 (25kg) controlled source shots at ~1350 m spacing were conducted along a 200 km North-South profile. A spread of 300 seismic stations, spaced 100 m apart, was moved in a roll-along style, to collect data suitable for standard reflection seismic processing and first arrival time tomography. Travel time data of seismic phases are used as input data to derive shallow velocity models of compressional waves (P), shear waves (S) and the Vp/Vs ratio. Using First Arrival Seismic Tomography (FAST) software, we derive shallow tomographic models for the upper 1 to 1.5 km. All three models are characterized by significant differences between the northern and the southern part. In the south P- and S-velocities are higher and Vp/Vs ratios lower while in the north the P- and S-velocities are lower while the Vp/Vs ratios show higher values. |
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