Basic magmatism and geotectonic evolution of the Pan African belt in central Africa: Evidence from the Katangan and West Congolian segments

Results of new geological mapping with the help of air and satellite photography in Sudan together with information from adjacent territories has enabled a map to be drawn showing the dominant basement tectonic trends in a previously geologically unknown area. Over 100 age determinations, including 25 unpublished analyses, allow the recognition of Eburnian age events in Central Africa Republic and southeast Libya similar to the 1950 million year (Ma) old Ruwenzori Belt in Uganda and similar events in Zaire. A northeast trending fold belt is recognized in Central Africa, western Sudan and southeast Egypt in which 1000 Ma ages are found. The Pan African age Mozambique belt truncates older structures in eastern Uganda and southern Sudan but is covered by a greenschist volcanic assemblage along the Red Sea coast in which 550 ± 150 Ma old granites and regional metamorphism occur.

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Petrology and Geochemistry of Hama Koussou Dolerite Dyke Swarms (North Cameroon, Central Africa)

Journal of Geography Environment and Earth Science International ◽

10.9734/jgeesi/2019/v23i330170 ◽

2019 ◽

pp. 1-19

Author(s):

Fagny Mefire Aminatou ◽

Bardintzeff Jacques-Marie ◽

Nkouandou Oumarou Faarouk ◽

Lika Gbeleng Thomas D’Aquin ◽

Ngougoure Mouansie Samira

Keyword(s):

Central Africa ◽

Alkali Feldspar ◽

Rift System ◽

Spinel Lherzolite ◽

Dolerite Dyke ◽

Pan African ◽

Tholeiite Basalt ◽

Petrology And Geochemistry ◽

African Rift ◽

Geochemical Analyses

The Pan African granitoid basement of Hama Koussou Cretaceous half basin in North Cameroun (Central Africa) is transected by near N-S, NE-SW and ENE-WSW giant doleritic dykes trending along the same Pan African directions. Hama Koussou dolerites are compliant with the regional distension that occurred after the Pan African basement consolidation prior to the development of West and Central African Rift System at Late Jurassic-Early Cretaceous times. Studied lavas are composed of large clinopyroxene oïkocrysts, plagioclase and alkali feldspar laths and oxides phenocrysts exhibiting ophitic, sub-ophitic and intercertal textures. Microprobe chemical analyses carry out on the main mineral phases show that clinopyroxenes are diopside and augite, plagioclases are labradorite, andesine, oligoclase and albite and alkali feldspars are mainly sanidine with a few percent of orthoclase. ICP-MS and ICP-AES geochemical analyses of Hama Koussou lavas exhibit basalt, basaltic trachyandesite and trachyandesite compositions of continental tholeiite features. Tholeiite basalts of Hama Koussou are the results of high partial melting of E-MORB mantle source of spinel lherzolite composition, located at 65-55 km depth. More evolved tholeiite lavas of Hama Koussou basin are the products of tholeiite basalt differentiation trough assimilation and fractional crystallization coupled with fluids circulation.

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Variation of Subsurface Resistivity in the Pan-African Belt of Central Africa

The Structural Geology Contribution to the Africa-Eurasia Geology: Basement and Reservoir Structure, Ore Mineralisation and Tectonic Modelling - Advances in Science, Technology & Innovation ◽

10.1007/978-3-030-01455-1_6 ◽

2018 ◽

pp. 25-27

Author(s):

Dieudonné Bisso ◽

Zakari Arétouyap ◽

Georges Nshagali Biringanine ◽

Philippe Njandjock Nouck ◽

Jamal Asfahani

Keyword(s):

Central Africa ◽

Pan African ◽

Subsurface Resistivity

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Pan-African Freedom Movement of East and Central Africa (PAFMECA)

International Organization ◽

10.1017/s002081830001122x ◽

1962 ◽

Vol 16 (2) ◽

pp. 446-448 ◽

Cited By ~ 1

Keyword(s):

Political Parties ◽

Central Africa ◽

Nationalist Movements ◽

Coordinated Action ◽

Pan African ◽

Southern Rhodesia ◽

Freedom Movement

PAFMECA was formed at a conference held in Mwanza, Tanganyika, from September 16 to 18, 1958, for the purpose of coordinating regional activities toward the achievement of independence for territories in East and Central Africa. The conference, which was attended by representatives of political parties from Kenya, Nyasaland, Tanganyika, Uganda, and Zanzibar, considered the following issues: 1) the position of those present toward (a) the non-African minorities in Kenya, Tanganyika, and Uganda, and (b) the Central African Federation (Nyasaland, Northern Rhodesia, and Southern Rhodesia); 2) methods for achieving coordinated action among the nationalist movements in East and Central Africa and for pooling resources in a concerted drive against imperialism; and 3) the development of a fundamental philosophic creed for the emergent African nations.

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FEDERATION, PARTNERSHIP, AND THE CHRONOLOGIES OF SPACE IN 1950s EAST AND CENTRAL AFRICA

The Historical Journal ◽

10.1017/s0018246x19000712 ◽

2020 ◽

Vol 63 (5) ◽

pp. 1325-1348

Author(s):

ISMAY MILFORD

Keyword(s):

Twentieth Century ◽

East Africa ◽

Central Africa ◽

East African ◽

Chronological Change ◽

Pan African ◽

Regional Projects ◽

The Relationship ◽

Geographical Space ◽

National Borders

AbstractThis article assesses the relationship between the imposed Central African Federation (1953–63) and the ways in which East and Central African thinkers and leaders conveyed and pursued the possibilities of decolonization. Existing literature on federalism in twentieth-century Africa fails to place regional projects in dialogue, studying in isolation East Africa and Central Africa, ‘utopian’ and oppressive regionalisms. But such clear dividing lines were not articulated in the four discursive ‘sketches’ of East and Central Africa that this article brings to light: those of anti-Federation organizations in Nairobi and Ndola in 1952; students at Makerere College (Kampala) in 1953; mobile Malawian activists in regional and pan-African forums around 1955–8; and East African party publicity representatives around 1958–60. At each of these critical moments, thinkers creatively constructed various relationships between geographical space and chronological change, through the lens of a broader, interdependent East and Central Africa, as a means to fend off perceived threats to a precarious advancement towards a democratic future. Attending to the evolution of these ideas shows not only how the Central African Federation placed material constraints on regional solidarity, but how ‘thinking regionally’ could support the case for national borders, even before decolonization.

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