Alkaline Rocks and Carbonatites of the World

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Lonnie

stripes

Occurrence number: 
031-00-016
Country: 
Canada
Region: 
British Columbia
Location: 
Longitude: -124.5, Latitude: 55.07

A long, narrow complex 6-700 m in length with a maximum width of about 50 m, lies conformably amongst schists and gneisses of the Wolverine complex, which are fenitized close to the complex. Carbonatite occurs as sodic pyroxene and biotite-rich types; in both the carbonate is calcite. A little plagioclase, microcline, blue alkali amphibole, apatite and pyrochlore occur. The fenites contain sodic pyroxene and amphibole and are intensivelly fractured with sheared contacts against the carbonatite.

Economic: 
Uranian-pyrochlore is widespread in the pyroxene carbonatite and columbite and ilmenorutile occur in fenites. In the central area Nb205 averages 0.3%.
References: 
ROWE, R.B. 1958. Niobium (columbium) deposits of Canada. Economic Geology, Geological Survey of Canada, 18: 1-108
Fig. 11 The Lonnie Complex (after Rowe, 1958, Fig.2.).
Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith