Kinematic and sedimentological evolution of the Manyara Rift in northern Tanzania, East Africa

Uwe Ring, Hilde L. Schwartz, Timothy Bromage, Charles Sanaane

Research output: Contribution to journalArticle

Abstract

We describe the stratigraphical/sedimentological and structural evolution of the Manyara Rift in the Tanzania Divergence Zone, East Africa. The rift-related Manyara Beds on the shoaling side of the Manyara Rift were deposited between < 1.7 and 0.4 Ma and can be separated into a lacustrine lower member and a fluvial upper member. The transition from lacustrine to fluvial sedimentation at ∼0.7 Ma appears to be related to a southward shift of major rift faulting. Fault geometry and the kinematics of the faults are consistent with major faulting during NE/E-directed extension. There is also evidence for other extensional directions including radial extension, which might be caused by magmatic activity and/or might reflect oblate strain symmetry where the East African Rift propagated into the Archaean Tanzania Craton and associated termination of rifting caused an increase in the strained area.

Original languageEnglish (US)
Pages (from-to)355-368
Number of pages14
JournalGeological Magazine
Volume142
Issue number4
DOIs
StatePublished - Jul 2005

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faulting
kinematics
fault geometry
rifting
symmetry
craton
Archean
divergence
sedimentation
East Africa

Keywords

  • East African Rift
  • Extension
  • Faults
  • Kinematic analysis
  • Sedimentology

ASJC Scopus subject areas

  • Earth and Planetary Sciences (miscellaneous)

Cite this

Kinematic and sedimentological evolution of the Manyara Rift in northern Tanzania, East Africa. / Ring, Uwe; Schwartz, Hilde L.; Bromage, Timothy; Sanaane, Charles.

In: Geological Magazine, Vol. 142, No. 4, 07.2005, p. 355-368.

Research output: Contribution to journalArticle

Ring, Uwe ; Schwartz, Hilde L. ; Bromage, Timothy ; Sanaane, Charles. / Kinematic and sedimentological evolution of the Manyara Rift in northern Tanzania, East Africa. In: Geological Magazine. 2005 ; Vol. 142, No. 4. pp. 355-368.
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