... and Raman spectroscopy of samples from the Gold Hunter vein of the Lucky Friday mine revealed the presence of the rare iron oxide wüstite (Fe 1−x O) coexisting with stable magnetite. An assemblage of galena, pyrite, and siderite is associated with the two iron oxides although these minerals do not share...

...Figure 1. Plan view of the of the Lucky Friday Mine some 1750 m below the surface. The general location of the hypocenter is shown as is the location of the documented bedding slip associated with the event. Note that the bedding dips moderately south, intersecting the steeply dipping vein...

... planes common in the district. Low-level seismicity in the immediate vicinity of the Lucky Friday Mine is driven in the short term by mining rate, as is evident from the decreased levels of seismic activity on weekends when mining does not take place. In the longer term, cycles of tectonic stress build...

... and Fe-Zn partitioning between fahlore and sphalerite, we estimate that fahlore compositions were frozen in by about 235 °C, roughly 40 °C above corresponding temperatures obtained for the Gold Hunter vein of the Lucky Friday Mine. This result and the absence of readily detectable diaphorite (~Pb 2 Ag 3...

...F ig . 12. Vertical longitudinal projections of four major veins in the Coeur d’Alene district. Shaded areas have been mined. Dashed and solid lines identify lithologic boundaries in wall rocks. See text for discussion. A. Lucky Friday vein. Subvertical solid lines are faults that cut the Lucky...

... analyses of tetrahedrite-tennantite fahlores and associated sulfides/sulfosalts from the West Chance vein of the Sunshine Mine (Kellogg, ID) and from the Gold Hunter and Lucky Friday veins of the Lucky Friday Mine (Mullan, ID). The West Chance vein is a fahlore-siderite vein with an overprint of galena...

...Fig. 3 Location of the Lucky Friday and Consolidated Silver Mines in the Coeur d’Alene mining district of northern Idaho. The map also shows the main structural and intrusive features in the area. ...

... represent ore-barren, siderite- and/or ankerite-dominant veins; open circles represent ore-barren, calcite-dominant veins. Deposit abbreviations are as follows: AM = Amador, AT = Atlas, B = Bullion, BC = Burnt Cabin, BH = Bunker Hill, CC = Cold Creek, G = Galena, LF = Lucky Friday, LNF = Little North Fork...