Ompletely replaces it (Table 5, No. 31, 32). The tetrahedrite in Bar-5 sample containsOmpletely replaces

August 12, 2022

Ompletely replaces it (Table 5, No. 31, 32). The tetrahedrite in Bar-5 sample contains
Ompletely replaces it (Table 5, No. 31, 32). The tetrahedrite in Bar-5 sample contains much more than four wt. of Zn. Secondary minerals replacing theMinerals 2021, 11,12 ofchalcopyrite are typically covellite CuS and geerite Cu8 S5 (Figure 9c ). Aikinite PbCuBiS3 is as well a normal-assemblage mineral in the gold-sulfosalt-quartz association in the Northern and Hanging zones (Table 5). The gold-sulfosalt-quartz association in the Rusty zone (Figure ten) is distinguished by the presence of copper-bearing (4.93 wt. of Cu) electrum, the composition of which corresponds for the formula Au0.70 Ag0.17 Cu0.13 , or additional merely, Au7 Ag2 Cu, as well as bornite (Figure 10a,b). The tetrahedrite in Bar-2-1 sample can also be Bi-rich (Table 5), but its concentration is lower than that of As. Yet another typomorphic Bi-rich mineral, wittichenite Cu3 BiS3 , as an alternative of emplectite (CuBiS2 ), is characteristic of Minerals 2021, 11, x FOR PEER Evaluation 14 of 22 this association in the Rusty zone (Figure 10e ).Figure 10. Microparagenesis the gold-sulfosalt-quartz association, polished section of the the Bar-2-1 sample, zone: Figure ten. Microparagenesis ofof the gold-sulfosalt-quartz association, polished section ofBar-2-1 sample, ML-SA1 MedChemExpress RustyRusty (a,c)–in reflected light; (b,d )–SEM image. Intergrowth of chalcopyrite, bornite Cu FeS and tetrahedrite zone: (a,c)–in reflected light; (b,d )–SEM image. Intergrowth of chalcopyrite, bornite Cu5FeS4 four and tetrahedrite five (Cu,Fe)12(Sb,As,Bi)4S13 which includes the hessite Ag2Te grain; (c,d)–Cu-bearing electrum intergrown with chalcopyrite, (Cu,Fe)12 (Sb,As,Bi)four S13 such as the hessite Ag2 Te grain; (c,d)–Cu-bearing electrum intergrown with chalcopyrite, bornite bornite and tetrahedrite; (e ) Intergrowths of chalcopyrite with sulfosalts of distinctive composition: tetrahedrite (e ), and tetrahedrite; (e ) Intergrowths of chalcopyrite with sulfosalts of various composition: tetrahedrite (e ), wittichenite wittichenite Cu3BiS3 (e,g ); tetradymite Bi2Te2S (f) and mawsonite Cu6Fe2SnS8. Cu3 BiS3 (e,g,h); tetradymite Bi2 Te2 S (f) and mawsonite Cu6 Fe2 SnS8 .four.4. Concentration of Ore and Chalcogenic Elements The concentration of ore and chalcogenic elements in samples from distinct zones in the Baranyevskoye deposit have been obtained. The concentration of valuable metals is unevenly distributed: tenths of ppm Au inside the Southern zone, units of ppm inside the Rusty and Central zones, tens of ppm inside the Hanging zone, whereas the highest concentrations of hundreds of ppm happen within the Northern zone (Table six). Normally, Au prevails more than Ag in all zones (Au/Ag ratios are 2.80.91 and Ag/Au ratios are 0.10.72) except for the Southern zone, in which the Au/Ag ratios differ inside the BMS-986094 web selection of 0.16.52 for the quartz vein, and reaches as much as 2.35 in the metasomatitic host rock (sample BAR-6-5). Thus, the samples in the tunnels (BAR-5) on the Northern Zone would be the richest in Au. Sample BAR-5-1 represents the gold-pyrite-quartz association, even though sample BAR-5-2 represents the gold-sulfosalt-quartz association, in which the concentrations of Pb, Sb, Se are improved by 1 order of magnitude, Cu and Sn by two orders of magnitude, and Bi by four orders of magnitude compared using the content material of these elements in samples from other zones. At the identical time, the As concentration just isn’t high when compared with its anomalous values (1030 ppm) within the gold-pyrite-quartz association of the very same zone. The aforementioned distribution of components is consistent with mineralogical featu.