Fen Complex
The Fen Complex (
igneous rocks. Several varieties of carbonatite are present in the area as well as lamprophyre, ijolite and other highly alkalic rocks. It is the type locality for fenite, a metasomatic rock commonly found around carbonatite and alkali intrusives.[1]
The Fen Complex is a roughly circular area about three kilometres in diameter. It is located just west of the
Radiometric age dating on the carbonatites gave an age of 539 +/- 14 Myr. The host rocks for the intrusions are middle Proterozoic granites and gneiss and the complex was associated with the Cambrian rifting of the cratonic rocks.[2]
The complex is a protected location because of the rare minerals and rock types found there. The rocks were first described by Waldemar Christofer Brøgger in 1921.[1]
See also
References
- ^ a b http://www.mindat.org/loc-14357.html Mindat location description
- ISBN 3-540-67772-0
59°16′04″N 9°16′40″E / 59.2677°N 9.2779°E
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