THALLIUM, NICKEL, COBALT AND OTHER TRACE ELEMENTS IN IRON SULFIDES FROM BELGIAN LEAD - ZINC VEIN DEPOSITS
Fe sulfides associated with Belgian Pb-Zn vein deposits have been analyzed by DC arc spectrometry and XRF for Tl, Ni, Co, Mn, Zn, Pb, Ge, Cd, and As. They show high Tl contents (from > 30 ppm up to 6800 ppm) and Co:Ni ratios < 1. These features permit to distinguish them from Fe sulfides of sedimentary and high temperature occurrences. The Tl distribution in a botryoidal marcasite of Vedrin (average Tl content of O.68 %) has been investigated by ion microprobe. It displays a pattern similar to colloform texture. Principal component analysis shows that the behaviour of Tl is partly controlled by a factor opposing Tl to all other elements. This is interpreted as reflecting the influence of sorption mechanisms by contrast with direct precipitation. Tl and the other elements are not considered of magmatic origin because no acidic magmatism is known during or after hydrothermal brines is favoured.
Bibliographic Reference: EUR 8617 EN-FR (1984) FS - REPRINTED FROM MINERALIUM DEPOSITA, SPRINGER-VERLAG PP. 303-313, BFR 400 , EUROFFICE, LUXEMBOURG, POB 1003
Record Number: 1989122032800 / Last updated on: 1987-01-01
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