Genetic implications of pyrite chemistry from the Palaeoproterozoic Olary Domain and overlying Neoproterozoic Adelaidean sequences, northeastern South Australia

Trace Element Analysis of Pyrite from the Zhengchong Gold Deposit, Northeast Hunan Province, China: Implications for the Ore-Forming Process

“…The Co/Ni ratio in pyrite has been used by many authors as an empirical indicator of the depositional environment [15,[70][71][72]. The presence of chemical zoning in the pyrite of the Zhengchong gold deposit may reflect fluctuations in temperature and pH [15,72].…”

Electron microprobe analyses of ore minerals and H–O, S isotope geochemistry of the Yuerya gold deposit, eastern Hebei, China: Implications for ore genesis and mineralization

“…Therefore, pyrite can preserve information about the original formation of the sulfides. Trace element compositions of pyrite have been used as genetic fingerprints (e.g., Loftus-Hills and Solomon, 1967); for example, Co/Ni ratios can be used as an empirical indicator of the formation the environment of pyrite (e.g., Davidson, 1962;Loftus-Hills and Solomon, 1967;Bralia et al, 1979;Ivor Roberts, 1982;Bajwah et al, 1987;Raymond, 1996;Craig et al, 1998;Clark et al, 2004;Koglin et al, 2010;Ulrich et al, 2011;Winderbaum et al, 2012). However, the use of this ratio needs to take into account other provenance factors, as obtained from field observations and other data.…”

“…Pyrite that forms in different environments has different Co/Ni ratios, and a significant body of research has been devoted to investigating ranges for this ratio; for example, volcanic pyrite is thought to be characterized by Co/Ni ratios of 5-10 (e.g., Price, 1972;Bralia et al, 1979;Brill, 1989;Bechtel et al, 1998;Yan et al, 2003;Zaccarini and Garuti, 2008), whereas sedimentary pyrite has Co/Ni values of ≤ 1 (e.g., Loftus-Hills and Solomon, 1967;Liu et al, 2000;Orgün et al, 2005;Deol et al, 2012), and hydrothermal pyrite generally has Co/Ni ratios of ≥ 1 (e.g., Loftus-Hills and Solomon, 1967;Liu et al, 2000;Clark et al, 2004;Orgün et al, 2005;Pal et al, 2009). The majority of pyrite from the Yuerya deposit has Co/Ni ratios of N1 and can be split into two ranges of ratios: 0.15-1 (n = 37) and 1.05-4.98 (n = 67), although rare pyrite with values of N5 is also present (5.58 and 9.96; Supplementary Table 1).…”

“…For example, the presence of trace elements such as Co, Ni, and Se in pyrite is considered to be a reliable indicator of the metallogenic history of a deposit (e.g., Loftus-Hills and Solomon, 1967;Bralia et al, 1979;Huston et al, 1995;Raymond, 1996;Clark et al, 2004;Koglin et al, 2010;Ulrich et al, 2011). Similarly, trace elements in sphalerite can be used as tracers of ore genesis (Cook et al, 2009b;Ye et al, 2011).…”

Gold-bearing ferroselite (FeSe2) from Trogtal, Harz, Germany, and significance of its Co/Ni ratio

“…Pyrite has also been investigated for other trace and minor elements. Among them, the contents of Co and Ni in pyrite, specifically its Co/Ni ratios, have been used as an indicator of the environment of pyrite formation (e.g., Loftus-Hills and Solomon 1967;Bralia et al 1979;Clark et al 2004;Marques et al 2006;Koglin et al 2010;Pal et al 2011). Recently, the Co/Ni ratio in arsenopyrite has been applied to constrain the fluid source for an Au-lode deposit (Cabral and Koglin 2012).…”