The Upper Mantle Seismic Velocity Structure of South-Central Africa and the Seismic Architecture of Precambrian Lithosphere Beneath the Congo Basin - Geology and Resource Potential of the Congo Basin - page 11

Fig. 1.8 Checkerboard
resolution test results for periods
of 20 to 100 s. Green line shows
the zero thickness contour for the
Mesozoic and Cenozoic
sediments of the Congo Basin.
Lower right panel shows input
checker model

0˚ 0˚

−10˚

−10˚

−20˚ −20˚

−30˚

−30˚

20s 40s

10˚ 20˚ 30˚ 40˚ 10˚ 20˚ 30˚ 40˚

0˚

0˚

−10˚

−10˚

−20˚

−20˚

−30˚

−30˚

60s 80s

10˚ 20˚ 30˚ 40˚ 10˚ 20˚ 30˚ 40˚

0˚ 0˚

−10˚ −10˚

−20˚ −20˚

−30˚ −30˚

100s

4x4

10˚ 20˚ 30˚ 40˚ 10˚ 20˚ 30˚ 40˚

jungles of SE Cameroon and SW Central African Republic.
In southern Cameroon, the ca. 0.6 Ga Yaounde gneisses,
which represent a possible deformed passive margin of the
northern Ntem Craton, have T DM Sm-Nd ages of 1.6-1.0 Ga,
indicating a derivation from Kibaran-aged rocks (Toteu et al.

1994 ). The Liki-Bembian rocks are overlain by Neoprotero-
zoic Lindian rocks, in the same way that rocks of the classic
Kibaran Belt of eastern Democratic Republic of Congo are
overlain by Neoproterozoic Katangan rocks (Cahen 1954 ).