Alkaline Rocks and Carbonatites of the World

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Sabinyo

stripes

Occurrence number: 
038-00-010
Country: 
Comoros
Location: 
Longitude: 29.58, Latitude: -1.38

The summit of the Sabinyo volcano marks a triple international boundary junction between Congo, Rwanda and Uganda. About half of the products of the volcano lie in Rwanda and these are described under Rwanda No. 3. Approximately one quarter of the volcano lies in Uganda and contributed substantially to the Bufumbira field, information on which will be found under Uganda No. 8. Little work has been undertaken on the part of the volcano lying in Congo. It is important to note that the products of this volcano are the only ones in the Virunga volcanic field that are silica saturated and oversaturated.

References: 
HOLMES, A. and HARWOOD, H.F. 1937. The volcanic area of Bufumbira. Part 2. The petrology of the volcanic field of Bufumbira, south-west Uganda, and of other parts of the Birunga field. Geological Survey of Uganda, Memoir, 3 (Part 2): 1-300.VOLLMER, R. and NORRY, M.J. 1983. Possible origin of K-rich volcanic rocks from Virunga, East Africa, by metasomatism of continental crustal material: Pb, Nd and Sr isotopic evidence. Earth and Planetary Science Letters, 64: 374-86.
Location: 
Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith