Open AccessBeryllium mineralization in the Ilímaussaq intrusion, South Greenland
Author(s) -
J. Engell,
J. Hansen,
Mai-Britt Mose Jensen,
H. Kunzendorf,
Leif Løvborg
Publication year - 1971
Publication title -
rapport
Language(s) - English
Resource type - Journals
eISSN - 2597-2944
pISSN - 0418-6559
DOI - 10.34194/rapggu.v33.7247
Subject(s) - peralkaline rock , beryllium , geology , geochemistry , hydrothermal circulation , mineralogy , aegirine , analcime , mineralization (soil science) , chemistry , paleontology , volcano , biochemistry , quartz , zeolite , organic chemistry , soil science , soil water , catalysis
In the peralkaline Ilimaussaq intrusion in South Greenland minor quantities of beryllium minerals are widespread in hydrothermal veins. Concentrations of veins rich in beryllium minerals are known from the Taseq slope and the Kvanefjeld area in the northern part of the intrusion. Up to now 10 beryllium minerals have been found, the most important being chkalovite. The hydrothermal veins range in width from about 1 mm to 2 m but are mostly a few cm thick. The most important minerals in the veins are analcime, sodalite, ussingite, natrolite, aegirine, arfvedsonite, epistolite and chkalovite. A field beryllometer based on the photoneutron method of determining beryllium is described. With a 100 mCi Sb124 activation source the instrument has a limit of detection ofless than 10 ppm BeO. The effective measuring area is ca. 40 cm2. Beryllium has a log-normal distribution in the rocks of the area.