%0 Journal Article
%T Gold-bearing ferroselite (FeSe2) from Trogtal, Harz, Germany, and significance of its Co/Ni ratio
%A Cabral A R
%A Koglin N
%A Br£¿tz H
%J Journal of Geosciences
%D 2013
%I 
%R 10.3190/jgeosci.129
%X Ferroselite from Trogtal, the type locality of the cobalt selenide trogtalite, in the Harz Mountains, Germany, forms a trogtalite-ferroselite assemblage in pockets of massive clausthalite in which specular hematite is dispersed. The pockets occur in hematite-impregnated carbonate veins, emplaced in a reddened greywacke of Lower Carboniferous age. Ferroselite contains  0.2-5.0 ppm Au; trogtalite has even higher Au contents. Ferroselite has Co/Ni ratios mostly above unity. These characteristics likely reflect oxidizing brines with Co/Ni > 1, such as those involved in the formation of sediment-hosted copper deposits.
%K ferroselite
%K trogtalite
%K Co/Ni ratio
%K Trogtal
%K Harz
%K Germany
%U http://www.jgeosci.org/content/jgeosci.129_cabral.pdf