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SUMMARY:[NO SHOW] Velocity structure of the uppermost mantle beneath the t
 anzanian craton and the surrounding proterozoic mobile belts from pn tomog
 raphy
DTSTART:20210629T140500Z
DTEND:20210629T142000Z
DTSTAMP:20260424T203800Z
UID:indico-contribution-819@conferences.ctbto.org
DESCRIPTION:Speakers: Richard Brazier (Pennsylvania State University\, PA\
 , USA)\, Raymond Durrheim (University of the Witwatersrand\, Johannesburg\
 , South Africa)\, Nada El Tahir (University of Khartoum\, Sudan)\, Andrew 
 Nyblade (Pennsylvania State University\, PA\, USA)\n\nThe uppermost mantle
  structure beneath East Africa is investigated by      inverting the Pn tr
 aveltimes to obtain a model of P wave velocities. The previous Pn tomograp
 hy models of the region have been expanded. A total of 2870 new Pn travel 
 time measurements of local and regional earthquakes have been made and mod
 eled\, improving the resolution of the uppermost mantle velocity structure
  across much of East Africa. The new Pn tomography model shows variations 
 in uppermost mantle velocities across the region which can be used to unde
 rstand the size of the Tanzania Craton and the differences between the Eas
 tern and Western branches of the East African Rift System (EARS). Results 
 reveal fast Pn velocities beneath the Tanzania Craton\, the extension of t
 hese fast velocities beneath the Mozambique Belt to the east of the craton
 \, the Kibaran Belt west of the craton\, and beneath the northern half of 
 the Ubendian Belt to the southwest of the craton. In addition\, the fast P
 n velocities beneath the Western Branch everywhere contrast with the slow 
 Pn velocities of 7.5-7.8 km/s beneath the Eastern Branch in Kenya\, showin
 g that the upper mantle beneath the Eastern Branch has been altered much m
 ore than beneath the Western Branch.\n\nhttps://conferences.ctbto.org/even
 t/7/contributions/819/
LOCATION:Location 2 (Online)
RELATED-TO:indico-event-7@conferences.ctbto.org
URL:https://conferences.ctbto.org/event/7/contributions/819/
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