Burton and Lake Tanganyika. Edited by Charles Richards. Dar es Salaam: East African Literature Bureau, n.d. Pp. 72, map. 2s. - Count Teleki and the discovery of Lakes Rudolf and Stefanie. Edited by C. G. Richards. London: Macmillan & Co. Ltd. (in association with the EALB), 1960. Pp. 85, map. 3s. - Elton in the Southern Highlands of Tanganyika. Edited by Caroline Lee. Dar es Salaam: Eagle Press (for the EALB), 1960. Pp. 60, map. 3s. - Utenzi wa Vita vya Wadachi Kutamalaki Mrima, 1307 A.H. By B. Hemedi B. Abdallah B. Said B. Abdallah Masudi El Buhriy (translation and notes by J. W. T. Allen. Dar es Salaam: Eagle Press (for the EALB), 1960. Pp. 84. 4s.

Abstract Since the late 1980s, linguists’ analyses of Sheng, the urban youth language from Nairobi, have led to the growth of a considerable body of literature. In contrast, only a few studies are available that cover other youth registers from the Kiswahili-speaking parts of Africa. While most of the available studies either deal with techniques of manipulation or with adolescents’ identity constructions, our paper intends to give a comparative overview of specific morphological features of Kiswahili-based youth languages. While certain characteristics of Sheng (Nairobi/Kenya), Lugha ya Mitaani (Dar es Salaam/Tanzania), Kindubile (Lubumbashi/DR Congo) and Yabacrâne (Goma/DR Congo) largely diverge from East Coast Swahili (hereafter ECS) in regard to their nominal and verbal morphology, they all share specific features. Focusing on (apparent) supra-regional developments and changes in Kiswahili, this preliminary description of some structural features that transcend all four youth language practices aims to provide comparative insights into urban register variation, approaching East African youth languages from a micro-typological perspective.

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Early-Stage Extension in the Southwest East African Rift: Integration of New Seismic Reflection Data

10.2118/afrc-2614293-ms ◽

2016 ◽

Author(s):

Christopher A. Scholz ◽

Douglas Wood

Keyword(s):

Seismic Reflection ◽

Lake Tanganyika ◽

Early Stage ◽

East African Rift ◽

East African ◽

Seismic Reflection Data ◽

Reflection Data ◽

Legacy Data ◽

African Rift ◽

Water Depths

ABSTRACT The western branch of the East African Rift is characterized by modest amounts of extension and by deeply-subsided, fault-controlled basins filled with large, deep lakes. Lakes Tanganyika and Nyasa (Malawi) are two of the largest lakes in the world, with maximum water depths of 1450 and 700 m respectively. Newly acquired seismic reflection data, along with newly reprocessed legacy data reveal thick sedimentary sections, in excess of 5 km in some localities. The 1980's vintage legacy data from Project PROBE have been reprocessed through pre-stack depth migration in Lake Tanganyika, and similar reprocessing of legacy data from Lake Nyasa (Malawi) is underway. New high-fold and large-source commercial data have recently been collected in southern Lake Tanganyika, and new academic data have been acquired in the northern and central basins of Lake Nyasa (Malawi) as part of the 2015 SEGMeNT project. In the case of Lake Tanganyika, new data indicate the presence of older sediment packages that underlie previously identified "pre-rift" basement (the "Nyanja Event"). These episodes of sedimentation and extension may substantially predate the modern lake. These deep stratal reflections are absent in many localites, possibly on account of attenuation of the acoustic signal. However in one area of southern Lake Tanganyika, the newly-observed deep strata extend axially for ~70 km, likely representing deposits from a discrete paleolake. The high-amplitude Nyanja Event is interpreted as the onset of late-Cenozoic rifting, and the changing character of the overlying depositional sequences reflects increasing relief in the rift valley, as well as the variability of fluvial inputs, and the intermittent connectivity of upstream lake catchments. Earlier Tanganyika sequences are dominated by shallow lake and fluvial-lacustrine facies, whereas later sequences are characterized by extensive gravity flow deposition in deep water, and pronounced erosion and incision in shallow water depths and on littoral platforms. The age and provenance of the sub-Nyanja Event sequences is unknown, but may correlate to Miocene, Cretaceous or Karroo-age sedimentary packages documented elsewhere in the southwestern part of the East African Rift, including in the region around Lakes Rukwa and Nyasa (Malawi).

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Geology and U-Th-Pb Dating of the Gakara REE Deposit, Burundi

Minerals ◽

10.3390/min8090394 ◽

2018 ◽

Vol 8 (9) ◽

pp. 394 ◽

Cited By ~ 7

Author(s):

Seconde Ntiharirizwa ◽

Philippe Boulvais ◽

Marc Poujol ◽

Yannick Branquet ◽

Cesare Morelli ◽

...

Keyword(s):

Rare Earth ◽

Lake Tanganyika ◽

Hydrothermal Activity ◽

Field Observations ◽

Upper Crust ◽

East African ◽

Geochronological Data ◽

Ree Mineralization ◽

Pan African ◽

African Rift

The Gakara Rare Earth Elements (REE) deposit is one of the world’s highest grade REE deposits, likely linked to a carbonatitic magmatic-hydrothermal activity. It is located near Lake Tanganyika in Burundi, along the western branch of the East African Rift. Field observations suggest that the mineralized veins formed in the upper crust. Previous structures inherited from the Kibaran orogeny may have been reused during the mineralizing event. The paragenetic sequence and the geochronological data show that the Gakara mineralization occurred in successive stages in a continuous hydrothermal history. The primary mineralization in bastnaesite was followed by an alteration stage into monazite. The U-Th-Pb ages obtained on bastnaesite (602 ± 7 Ma) and on monazite (589 ± 8 Ma) belong to the Pan-African cycle. The emplacement of the Gakara REE mineralization most likely took place during a pre-collisional event in the Pan-African belt, probably in an extensional context.

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Cartographical Quandaries: the Limits of Knowledge Production in Burton's and Speke's Search for the Source of the Nile

History in Africa ◽

10.1353/hia.0.0001 ◽

2008 ◽

Vol 35 ◽

pp. 455-479 ◽

Cited By ~ 3

Author(s):

Adrian S. Wisnicki

Keyword(s):

Knowledge Production ◽

Lake Tanganyika ◽

Lake Victoria ◽

Julius Caesar ◽

East African ◽

Blue Nile ◽

Historical Series ◽

The World ◽

Limits Of Knowledge ◽

White Nile

When he sighted the southern end of Lake Victoria on 3 August 1858, John Hanning Speke (1859b:397) realized that he had discovered the “source” of the White Nile, the most important tributary of the Nile proper, and so had “almost, if not entirely, solved a problem which it has been the first geographical desideratum of many thousand years to ascertain, and the ambition of the first monarchs of the world to unravel.” That Speke was an unknown explorer and that he had made his discovery on a solo “flying trip” during the East African Expedition of 1856-59, which, under the command of the renowned explorer Richard Francis Burton, had already also discovered Lake Tanganyika, made Speke's accomplishment all the more remarkable.As contemporaries soon asserted, Speke's discovery culminated a historical series of excursions, real and imagined, into the interior of Africa and placed Speke at the pinnacle of a line of explorers and geographers that ran from Herodotus, Julius Caesar, and Ptolemy to, in more recent times, James Bruce (the Scotsman who “discovered” the source of the Blue Nile, the second most important tributary of the Nile, in 1770), the German missionaries Ludwig Krapf and Johannes Rebmann (who “discovered,” respectively, the snow-capped mountains of Kilimanjaro in 1848 and Kenya in 1849), and noted “armchair geographers” like W.D. Cooley, Charles Beke, and James M'Queen.

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