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The AAPG/Datapages Combined Publications Database
AAPG Special Volumes
Abstract
Chapter from:
Edited by M
.
Harper,
D
.
M
. Stone, and C.K. Morley
Chapter 6 Geophysics of the Usangu Flats, Tanzania
R.M. Harper
D.M. Stone
Amoco Production Company
Houston, Texas, U.S.A.
C.K. Morley
Department of Petroleum Geoscience
University of Brunei Darussalam
Negara Brunei Darussalam
Abstract
The Usangu Flats are underlain by a sedimentary basin up to 1 km thick, that, from slow interval velocities, is inferred to be young and poorly compacted (Pliocene-Pleistocene). The main fault trends are east-west to northeast-southwest, which is an unusual direction for the East African Rift System (EARS) and may reflect structural development of the basin during a short period when the regional extension direction rotated to a northwest-southeast to north northwest-south southeast direction. The basin fill represents the early stages of rift development and displays faults that controlled the sedimentary section thickness without causing much rotation of the units. The initial basin fill onlapped an undulating basement topography.
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