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Abstract
During the period 1967–1980 private prospectors recovered 122 molybdenite mineralized samples from Norrbotten and Västerbotten, northern Sweden, representing acid igneous rocks of intrusive character, including quartz veins, supracrustal rocks of predominantly acid volcanic origin and skarns. The molybdenite occurrences are generally confined to the Proterozoic continental domain north of the Skellefte district. Fifty-six of the molybdenite samples from different rock types were analysed for major elements and 13 trace elements. Tin is, besides molybdenum, the only element enriched in all rock types. The molybdenite mineralized samples are poor in Nb, not enriched in Rb, and show occasionally high concentrations of F and Cu.