G34 



DATA OF GEOCHEMISTRY 



Table 62. — Analyses, in parts per million, of water from 

 Mozambique 



A. Rio Inharombe (Abst. agua Maxixe). 



B. Rio Mutomodi (Antonio Enes). 



C. Rio Messinge (Vila Cabral). 



D. Rio Limpopo (Pafuri). 



E. Rio Ratani (Nacala). 



F. Lagoa Galumue. 



G. Lagoa Nhajosse. 



H. Lagoa Legume (Vinanculos). 



waters of some of the large west African rivers, such as 

 the Congo, lie in rather dry regions and so there are a 

 few analyses, such as those for lakes Kivu and Tan- 

 ganyika, with a rather high total dissolved salt content. 

 Rivers such as the Senegal and Konkoure are more 

 representative of the humid tropics. Unfortunately 

 it has not been possible to find analyses of the down- 

 stream parts of either the Niger or the Congo, so it is 

 not possible to characterize these streams directly. 

 Between Niamey, for which there is a reasonably 



complete analysis, and Lokoja above the confluence of 

 the Benue, for which there are a few scraps of data, 

 the bicarbonate, sulfate, and chloride content all 

 decrease, but the silica content rises. The Benue is 

 probably a dilute water. It seems likely, therefore, 

 that the Niger at its mouth is a water high in silicate 

 with somewhat more than 50 ppm of total dissolved 

 solids. 



A selection of data for Ghana is given in tables 66, 

 67, and 68. The high dissolved-solids content of Lake 

 Bosumtwi is noteworthy. 



Table 63. — Analyses, in parts per million, of water from Angola 



These analyses are from the unpublished records of the Reparticao Central dos 

 Servicos de Geologia e Minas of the Provincla de Angola. The agreement of anion 

 and cation equivalent sums suggests that the sodium figures have been obtained 

 by calculation] 



1 Recalculated from Fea03 -f- AI2O3 on the assumption that only Fej03 was present. 



A. Rio Cunene at Colhida, Apr. 14, 1956. 



B. Rio Membla, near Macedo de Cavaleiros. 



C. Rio Caua at Quissama. 



D. Rio Bengo at frente do motor no. 1. 



E. Rio Bengo near Boa Vista. 



Table 64. — Analyses, in parts per million, of water from the Congo River basin 



A. 

 B. 

 C. 



Lake Kivu. Hundeshagen (1909, p. 203). 



Murundu River, at Bukavu. Analysis from Clerfayt (1955, p. 189). 



Ruzizi River, inflow to Lake Tanganyika. Analysis by the Government 



chemist, London. Quoted by Beauchamp (1939, p. 343). 

 Malagarasi, inflow to Lake Tanganyika. Analysis by the Government chemist, 



London. Quoted by Beauchamp (1939, p. 343). 

 Luichi, inflow to Lake Tanganyika. Analysis by the Government chemist, 



London. Quoted by Beauchamp (1939, p. 343). 



Lake Tanganyika surface water. Analysis by the Government chemist, Lon- 

 don, 1937. Quoted by Beauchamp (1939, p. 318). 



Lake Tanganyika water from 700 m depth. Analysis by the Government 

 chemist, London. Ouoted by Beauchamp (1939, p. 343). 



Basankusu (Ruki River). Nov. 1952. Clerfayt (1956, p. 29). 



Zongo (Inkiai). June 1951. Clerfayt (1956, p. 29). 



Zongo (Sele-Wungo). June 1951. Clerfayt (1956, p. 29) 



