“…Several studies (Gavelin and Gabrielson, 1947;Loftus Hills and Solomon, 1967;Seccombe, 1977;Bralia et al, 1979;Green et al, 1981;Campbell and Ethier, 1984;Bajwah et al, 1987;Ghorbani et al 2019) have employed the Co-Ni contents and Co/Ni ratio of pyrite in sulfide deposits to discriminate between submarine exhalative, magmatic or sedimentary origins for ore deposits. According to the authors, volcanogenic pyrite has Co contents between 400-2400 ppm and Co/Ni ratios above 5-10, higher than those typicall of sedimentary (< 100 ppm cobalt an Co/Ni value of < 1)or hydrothermal-related pyrites (Co/Ni: 1-5).…”