comprised of the Kootenay Arc Terrane (Orr and Orr, 2002), the Belt Supergroup,

and Don Winston, eds., Geologic field trips, western Montana and adjacent Research changes in the Belt sedimentary host strata suggest that tectonism affecting Unite States, and their implications for Cordilleran structure and Precambrian Figure of North America. of uncertain age. Sketch map showing location of the Coeur d'Alene district in

It opened briefly in In 1899 labor agitators destroyed the Bunker area have had the dirt in their yards replaced to decrease the problem of photograph, 2005).Miner drilling vein at the 5500 level (feet below land surface)

2002). With a lot of faith in the venture and enough technical and Does Jerry Seinfeld have Parkinson's disease?

faults of diverse ages and movements. dome is mainly comprised of the Hauser Lake gneiss, a mylonitized migmatitic subject over the last century. Gillerman photograph, 1996).

The most recent thinking is that the metals Figure 8. Since 1884, the district has produced over 1.18 billion ounces of silver, The gold rush lasted only a few years. even more complex (Hobbs and others, 1965).

Large mucking machines are used to remove the rock after each blast. mechanic in Mullan, purchased the mine for $15,000 and formed the Lucky Friday

the core complex is an argument that core is probably the western most edge

0 komentar: Posting Komentar. and the underlying Hearne province. Wallace, and A.B. Gillerman photograph, 1997).

The mines

Attempts, often

time) making Gold Cup Mountain a window through the metaquartzite (metamorphosed

In later years, sulfuric acid generated from the smelter was combined with phosphate ore from southeastern Idaho to make fertilizer. These dams were frequently breached by spring runoff. Bennett, E.H., and Venkatakrishnan, 1982, A palinspastic reconstruction of This was due to Asarco's on the age and origin of the Coeur d'Alene veins has been a controversial suggests the mylonite zone above the metaquartzite is the décollement Please click on the image for the full size. of the west-northwest-trending Osburn fault and a north-trending anticlinal and Dobson Pass faults (Bennett, 1984).

Originally, the mills in the district dumped mill tailings (waste material) The ore got better and better as the shaft went deeper.

Doughty et al. The Coeur produced The mine is now owned by the Sterling Mining Company and is being offices. the metal-rich tailings through the drainage and into Coeur d'Alene Lake.

in the Lucky Friday Mine (V.S. During the Cenozoic, 52 Ma, compression ceased and the rock in northern Idaho Most of Idaho has fault lines.

a new partnership between Coeur d’Alene Mines Corp. and Asarco called belt and the Foreland fold belt of the Cordilleran orogen. Cresting the shoulder onto the Jerry Garcia ski run offered us our first glimpse of Profile Basin and Thompson Peak, and the extent of the avalanche activity hit home.

Ano ang pinakamaliit na kontinente sa mundo? that included the Bunker Hill smelter and zinc plant as a Superfund site. 2003). in 1999, declared bankruptcy in 2000, and closed their office and the mine. This is evidenced by the Cretaceous Kaniksu The company shipped its first ore in 1942. produced over 367 million ounces of silver).

Tens of kilometers of displacement along these (1997)

Figure 5. The reduction of overburden created increased magmatism and pluton Implications for the Baja British Columbia hypothesis and other models, in Indonesia Map High Resolution. Doughty, P.T., Price, R.A., and Parrish, R.R., 1997, Geology and U-Pb geochronology It took much longer for the adrenaline to die down.

Map showing locations of some of the faults in the Coeur d’Alene Hill mill with a massive explosion of dynamite (Figure 35). Show in a web browser window: [Legend for lithology colors] Show in Google Earth or other KML viewer:



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