Alkaline Rocks and Carbonatites of the World

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

Morulinga

stripes

Occurrence number: 
170-00-017
Country: 
Uganda
Location: 
Longitude: 34.47, Latitude: 2.42
Carbonatite: 
No

A cylindrical plug of olivine melanephelinite of about 400x200 m forms the hill of Murulinga. Abundant phenocrysts of diopside and fewer of olivine (Fo82) are set in a groundmass of clinopyroxene, nepheline, olivine, magnetite, a pale mica, sodalite and pyrite. Hytonen (1959) gives analyses of a rock and pyroxene and olivine phenocrysts.

References: 

HYTONEN, K. 1959. On the petrology and mineralogy of some alkaline volcanic rocks of Toror Hills, Mt. Moroto, and Morulinga in Karamoja, northeastern Uganda. Bulletin de la Commission Geologique de Finlande, 184: 75-132.TRENDALL, A.F. 1965a. Explanation of the geology of Sheet 35 (Napak). Report, Geological Survey of Uganda, 12: 1-70.

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