On the chemical composition of the ore breccia at Luossavaara,northern Sweden

An important argument for a magmatic affiliation of the Kiruna type of ore is the presence of ore breccia which accompany the main ore bodies. According to Parák (1975a and b) the main ore bodies are not of the same origin as the breccias. This is based on data from the Luossavaara deposit in northern Sweden: the main ore and the breccia have different chemical compositions. Microprobe analyses made in the present study, however, clearly demonstrate similarity in chemical composition, strengthening the hypothesis of a common origin for both formations.