Indium-bearing chalcopyrite and sphalerite from the Gåsborn area, West Bergslagen, central Sweden

Abstract

In the G~sborn area, West Bergslagen, central Sweden, Fe-rich, indium-bearing (0.1-2.0wt.% In) sphalerite is replaced by Fe-poor sphalerite containing minute inclusions of chalcopyrite, roquesite and an unnamed ln-Zn-rich phase. Fe-rich, In-bearing sphalerite is primary; indium occurs as a roquesite molecule in solid solution. Fe-poor sphalerite, roquesite, chalcopyrite and the unnamed In-Zn-rich phase were formed from In-bearing sphalerite by secondary processes, characterized by the so-called 'chalcopyrite disease'.

Indium in cassiterite and ores of tin deposits

“…However, whole indium, which has been recovered during processing of the ores of hydrothermal tin and Sn-bearing VMS deposits, occurs as impurity in the In-bearing sulfides and sulfosalts. In recent years new data on the In contents in the mineral-carriers has been obtained (Cook et al, 2009(Cook et al, , 2011a(Cook et al, ,2011b(Cook et al, , 2011cGavrilenko and Pogrebs, 1992;Jovic et al, 2011;Jung and Seifert, 1996;Kieft and Damman, 1990;Kissin and Owens, 1989;Moura et al, 2007;Murakami and Ishihara, 2013;Murao et al, 2008;Ohta, 1989;Seifert, 1994;Seifert and Sandmann, 2006;Semenyak et al, Ore Geology Reviews 66 (2015) …”

Indium mineralisation in SW England: Host parageneses and mineralogical relations

“…10b) parallels relations at Mount Pleasant (Sinclair et al 2006), in the Freiberg region (Seifert and Sandmann 2006), and at Toyoha (Cook et al 2009). Kieft and Damman (1990) reported sphalerite with extreme Cu and In substitution (up to 15 wt%) from Bergslagen, Sweden, and suggested that sphalerite can display extensive solid solution with roquesite and chalcopyrite. At Perran St George, high Cu and In relates to very small sphalerite inclusions in chalcopyrite, and we consider it likely that they developed their compositions by high temperature equilibrium with their In-bearing chalcopyrite host.…”

Indium Enrichment in the Meng'entaolegai Ag-Pb-Zn Deposit, Inner Mongolia, China

“…Sphalerite and Cu-Fe-Sn-S-containing sulfide minerals in the Nakakoshi cassiterite-sulfide deposit of Japan contain 1.8-16.3 % In, and the ores contain 0.02 % In on average, which is thus a typical In-rich deposit (Tsushima et al, 1999). The presence of In-bearing sphalerite in ore deposits in the Gasborn region of central Switzerland makes the deposits enriched in In (Kieft and Damman, 1990). According to Ohta (1989Ohta ( , 1995 and Yajima et al (1993), the Toyoha Sn-polymetallic deposit in Japan produces an important amount of In.…”

“…Enrichment of In and its mineralization have been well documented by Anderson (1953), Ivanov et al (1963), Radkevich et al (1963), Greta (1980), Pearce et al (1984), Johan (1988), Kieft and Damman (1990), Murao et al (1991), Ohta (1989Ohta ( , 1995, Pattrick et al (1993), Botelho and Moura (1998), Tsushima et al (1999), Benzaazoua et al (2003), and the research result shows that those In-rich deposits spread over the world contain more or less Sn, even some of them occur as tin deposits.…”