Age and Origin of Base and Precious Metal Veins of the Coeur D'Alene Mining District, Idaho

The Sr–He–Ar isotopic and elemental evidence constraints on the ore genesis of the Zhaxikang Sb–Pb–Zn–Ag deposit in southern Tibet

“…However, the mixing curve of marine sediments and sample ZXK-12-B9 slightly deviate from that of calcite samples, which indicates that the real end member should have lower 87 Sr/ 86 Sr ratio and higher Sr concentration than sample ZXK-12-B9. According to previous literature, the magmatic hydrothermal fluid related to similar deposits can generate these Sr characteristics (e.g., 87 Sr/ 86 Sr ratio: 0.70578, Sr concentration: 1,697 ppm; Fleck et al, 2002), whereas hot spring usually have much lower Sr concentrations (5.8-8.7 ppm;Piepgras & Wasserburg, 1985). Therefore, the second episode of mineralization is more likely related to a magmatic hydrothermal fluid.…”

Isotope Discrimination of Source Waters, Flowpaths, and Travel Times at an Acid-Generating, Lead–Zinc–Silver Mine, Silver Valley, Idaho, USA

“…The Silver Valley is contained in the upper portion of the Coeur d'Alene River Basin (Figure 1), which is composed of quartzites, argillites, and siltites of the Mesoproterozoic Belt Supergroup that have been uplifted, folded, and fractured [9][10][11][12][13]. The Osburn Fault runs the length of the valley and is the origin of the NW-SE trending, strike-slip splay faults, such as the Alhambra, Cate, and Midland faults, that dip steeply southward through the mine site (Figure 4).…”

“…The Osburn Fault runs the length of the valley and is the origin of the NW-SE trending, strike-slip splay faults, such as the Alhambra, Cate, and Midland faults, that dip steeply southward through the mine site (Figure 4). These faults are the primary locations of the Bunker Hill galena-sphalerite ore [14][15][16] deposited from repeated Mesoproterozoic to Cretaceous hydrothermal intrusions [10,11,13].…”

“…The Osburn Fault runs the length of the valley and is the origin of the NW-SE trending, strike-slip splay faults, such as the Alhambra, Cate, and Midland faults, that dip steeply southward through the mine site (Figure 4). These faults are the primary locations of the Bunker Hill galena-sphalerite ore [14][15][16] deposited from repeated Mesoproterozoic to Cretaceous hydrothermal intrusions [10,11,13]. The upper Revett Formation of the Belt Supergroup is the primary ore-containing formation at the mine site and is comprised of quartzite beds interbedded with layers of argillite and siltite [13].…”

Metallogeny of the Paramillos de Uspallata Pb–Zn–Ag vein deposit in the Cuyo Rift Basin, Argentina

“…Silver-lead-zinc veins hosted in clastic sedimentary sequences (CSS Pb-Zn-Ag veins) form a distinct class of mineral deposits with a distinctive mineralogy, associated with crustal-scale faults (Beaudoin and Sangster, 1992). Several examples of this class of deposits have been documented around the world, in the Kokanee Range (Beaudoin and Sangster, 1992), Keno Hill district (Lynch et al, 1990) and Purcell Basin (Paiement et al, 2012) in Canada; the Freiberg district (Baumann, 1994) and Harz Mountains (Lu ¨ders and Mo ¨ller, 1992) in Germany; the Coeur d'Alene district (Fleck et al, 2002;Leach et al, 1998;Lydon, 2007) in the USA; the Pribram district (Za `k and Dobes, 1991) in the Czech Republic; and the Pumahuasi district in Argentina (Segal et al, 1999). Based on a worldwide review, Beaudoin and Sangster (1992) proposed a descriptive model for CSS Pb-Zn-Ag veins and discussed different alternative models for their genesis.…”