Alkaline Rocks and Carbonatites of the World

Setup during HiTech AlkCarb: an online database of alkaline rock and carbonatite occurrences

Bobong

stripes

Occurrence number: 
170-00-015
Country: 
Uganda
Location: 
Longitude: 34.55, Latitude: 2.83
Carbonatite: 
No

This is an agglomerate pipe 50 m in diameter that was intersected by an inclined borehole. The agglomerate includes fragments of country rock granulites, nephelinite, olivine nephelinite and rounded, carbonated and serpentinised ultrabasic nodules comprising 40-90% olivine, 5-20% Cr-diopside, 0-35% orthopyroxene and up to 15% Cr-spinel.

References: 

NIXON, P.H. 1973. Kimberlitic volcanoes in East Africa. Overseas Geology and Mineral Resources, Institute of Geological Sciences, London, 41: 119-38.

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