Alkaline Rocks and Carbonatites of the World

Funded by HiTech AlkCarb - New geomodels to explore deeper for Hi-Tech critical raw materials in Alkaline rocks and Carbonatites

Noqui

stripes

Occurrence number: 
005-00-001
Country: 
Angola
Location: 
Longitude: 13.57, Latitude: -6.07

From 16 km along the road from Noqui to Sao Salvador, Holmes (1915) described a riebeckite-aegirine granite marginal to albite granites. A mode, by weight, gave 32% quartz, 48% albite, microcline and perthite, 16% riebeckite, 4% aegirine and accessories including zircon. A rock analysis is given. This locality extends northwards into Congo (See Congo No. 20).

References: 
HOLMES, A. 1915. A contribution to the petrology of north-western Angola. Geological Magazine, 6: 228-32, 267-72.
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