Teleseismic investigation of the East African Rift - Kenya
作者： Hans-Albert Dahlheim , Paul Davis , Ulrich Achauer
DOI: 10.1016/S0899-5362(89)80039-9
关键词: Period (geology) 、 Lithosphere 、 Crust 、 Rift 、 Seismometer 、 Seismology 、 Asthenosphere 、 East African Rift 、 Bouguer anomaly 、 Geology
摘要: Abstract We recorded teleseismic events with 19 digital seismic recorders along a 600 km long profile across the East African rift in Kenya. At 5 stations three-component intermediate period seismometers were installed to investigate presence of partial melt by comparing P- and S-delays. find an average P-delay greater than 1.5 sec centered on eastern flank rift. The delay pattern can be correlated upwarp asthenosphere/lithosphere boundary resembles Bouguer gravity profile. Structural models estimated from 2d-inversions (ACH-algorithm) observed times suggest low-velocity zone is present down large depths beneath rift, dipping west. To east LVZ's are located crust upper mantle.
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