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Cliff Mine
The Cliff mine was the first successful copper mine in the Copper Country of the state of Michigan in the United States. The mine is at the now-abandoned town of Clifton in Keweenaw County. Mining began in 1845, and the Cliff was the most productive copper mine in the United States from 1845 through 1854. Large-scale mining stopped in 1878. The Cliff mined a fissure vein of native copper in Precambrian conglomerate and basalt beds. The vein was nearly vertical, dipping steeply to the east, and running north–south, nearly perpendicular to the strike of the enclosing beds. The productive part of the vein was below the Greenstone flow, which forms the cliff from which the mine took its name. The mine started by mining only high-grade ore; in 1848, the average grade mined was 26% copper. The average ore grade mined declined over time, and by 1869 was 3% copper, comparable to other copper mines of the time. Some native silver was also recovered; approximately 41,000 ounce ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Keweenaw County, Michigan
Keweenaw County (, ; , ) is a county in the Upper Peninsula of the U.S. state of Michigan, the state's northernmost county. As of the 2020 United States Census, the population was 2,046, making it Michigan's least populous county. It is also the state's largest county by total area, when the waters of Lake Superior are included in the total. The county seat is Eagle River. The county was set off and organized in 1861. It is believed "Keweenaw" is a corruption of an Ojibwe word that means "portage" or "place where portage is made"; compare the names of the nearby Portage Lake and Portage River which together make up the Keweenaw Waterway. Keweenaw County is part of the Houghton, Michigan, Micropolitan Statistical Area. Isle Royale, a national park which no longer has year-round inhabitants, was a separate county that was incorporated into Keweenaw County in 1897. Geography Two land masses comprise most of the land portion of the county: Isle Royale and the northeastern half ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Native Silver
Silver is a chemical element with the symbol Ag (from the Latin ', derived from the Proto-Indo-European ''h₂erǵ'': "shiny" or "white") and atomic number 47. A soft, white, lustrous transition metal, it exhibits the highest electrical conductivity, thermal conductivity, and reflectivity of any metal. The metal is found in the Earth's crust in the pure, free elemental form ("native silver"), as an alloy with gold and other metals, and in minerals such as argentite and chlorargyrite. Most silver is produced as a byproduct of copper, gold, lead, and zinc refining. Silver has long been valued as a precious metal. Silver metal is used in many bullion coins, sometimes alongside gold: while it is more abundant than gold, it is much less abundant as a native metal. Its purity is typically measured on a per-mille basis; a 94%-pure alloy is described as "0.940 fine". As one of the seven metals of antiquity, silver has had an enduring role in most human cultures. Other than i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Silver Mines In The United States
Silver is a chemical element with the symbol Ag (from the Latin ', derived from the Proto-Indo-European wikt:Reconstruction:Proto-Indo-European/h₂erǵ-, ''h₂erǵ'': "shiny" or "white") and atomic number 47. A soft, white, lustrous transition metal, it exhibits the highest electrical conductivity, thermal conductivity, and reflectivity of any metal. The metal is found in the Earth's crust in the pure, free elemental form ("native silver"), as an alloy with gold and other metals, and in minerals such as argentite and chlorargyrite. Most silver is produced as a byproduct of copper, gold, lead, and zinc Refining (metallurgy), refining. Silver has long been valued as a precious metal. Silver metal is used in many bullion coins, sometimes bimetallism, alongside gold: while it is more abundant than gold, it is much less abundant as a native metal. Its purity is typically measured on a per-mille basis; a 94%-pure alloy is described as "0.940 fine". As one of the seven metals of a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Copper Mines In Michigan
Copper is a chemical element with the symbol Cu (from la, cuprum) and atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. A freshly exposed surface of pure copper has a pinkish-orange color. Copper is used as a conductor of heat and electricity, as a building material, and as a constituent of various metal alloys, such as sterling silver used in jewelry, cupronickel used to make marine hardware and coins, and constantan used in strain gauges and thermocouples for temperature measurement. Copper is one of the few metals that can occur in nature in a directly usable metallic form (native metals). This led to very early human use in several regions, from circa 8000 BC. Thousands of years later, it was the first metal to be smelted from sulfide ores, circa 5000 BC; the first metal to be cast into a shape in a mold, c. 4000 BC; and the first metal to be purposely alloyed with another metal, tin, to create bronze, c. 350 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Copper Country Mills
The following is an incomplete list of stamping mills in the Copper Country of Michigan. * Ahmeek mill - In Hubbell, Houghton County, Michigan * Allouez mill * Atlantic mill - Near the Redridge Steel Dam in Redridge, Michigan * Baltic mill - Near the Redridge Steel Dam in Redridge, Michigan * Calumet and Hecla Mills - In Lake Linden, Houghton County, Michigan * Carp mill * Centennial mill * Central mill - Four miles east of Phoenix, Michigan * Champion mill - In Freda, Michigan * Clark mill * Cliff mill - Clifton, Michigan * Copper Falls mill - Southwest of Eagle Harbor, Michigan * Delaware mill - Delaware, Michigan * Dodgeville mill and pits - Dodgeville, Michigan * Humboldt mill - In Champion, Michigan. Planned to be used as a part of the new Eagle mine project * Huron mill * Isle Royale mill - Two miles east of Houghton, Michigan * Mohawk mill - In Gay, Michigan * Nonesuch mill * Phoenix mill * Quincy Mining Company Stamp Mills Historic District - Near Mason, Houg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Copper Country Mines
{{Short description, none Many copper mines have existed in the Copper Country of the U.S. state of Michigan. These include both large-scale commercial ventures and small operations. There are hundreds of ancient mining pits in and around the Copper Country area, especially on Isle Royale (several of these were developed). Numerous small modern diggings exist around the area as well, including some around Fort Wilkins and the Copper Harbor Light. Mines * 543-S - near Gratiot Lake, Keweenaw County * 543-S Deposit - near Deer Lake, Keweenaw County * Adventure mine - Greenland * Aetna Exploration Copper mine - Keweenaw County * Aetna mine - Keweenaw County * Agate Harbor mine - Agate Harbor, Keweenaw County * Agency mine - Keweenaw County * Ahmeek mine - Ahmeek, Keweenaw County * Albion mine (originally the Manhattan Mine) - Keweenaw County * Algomah mine - Mass City, Ontonagon County * Allouez mine - Allouez, Keweenaw County * American Mining, Exploring, & Manufacturing Company ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Copper Mining In Michigan
Copper mining in Michigan became an important industry in the 19th and early 20th centuries. Its rise marked the start of copper mining as a major industry in the United States. Geology Within the state of Michigan, copper is found almost exclusively in the western portion of the Upper Peninsula, in an area known as the Copper Country. The Copper Country is highly unusual among copper-mining districts, because copper is predominantly found in the form of pure copper metal (''native copper'') rather than the copper oxides or copper sulfides that form the copper ore at almost every other copper-mining district. The copper deposits occur in rocks of Precambrian age, in a thick sequence of northwest-dipping sandstones, conglomerates, ash beds, and flood basalts associated with the Keweenawan Rift. The native copper deposits originate in fissures, steeply dipping veins or in the amygdaloid top portion of the Portage Lake Lava Series lava tops and conglomerate beds. This serie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Calumet, Michigan
Calumet ( or ) is a village in Calumet Township, Houghton County, in the U.S. state of Michigan's Upper Peninsula, that was once at the center of the mining industry of the Upper Peninsula. Also known as Red Jacket, the village includes the Calumet Downtown Historic District, listed on the National Register of Historic Places (NRHP). The village may itself be included within the Calumet Historic District, a larger area which is NRHP-listed and which is a National Historic Landmark District. It is bordered on the north by Calumet Township, on the south by the unincorporated towns of Newtown and Blue Jacket, on the east by Blue Jacket and Calumet Township, and on the west by Yellow Jacket and Calumet Township. The population was 726 at the 2010 census. Calumet's nickname is Copper Town U.S.A. History What is now Calumet was settled in 1864, originally under the name of "Red Jacket", named for a Native American Chief of the Seneca tribe. Until 1895 the name "Calumet" was ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tamarack Mining Company
''Larix laricina'', commonly known as the tamarack, hackmatack, eastern larch, black larch, red larch, or American larch, is a species of larch native to Canada, from eastern Yukon and Inuvik, Northwest Territories east to Newfoundland, and also south into the upper northeastern United States from Minnesota to Cranesville Swamp, West Virginia; there is also an isolated population in central Alaska. The word ''akemantak'' is an Algonquian name for the species and means "wood used for snowshoes". Description ''Larix laricina'' is a small to medium-size boreal coniferous and deciduous tree reaching tall, with a trunk up to diameter. Tamaracks and larches (''Larix'' species) are deciduous conifers. The bark is tight and flaky, pink, but under flaking bark it can appear reddish. The leaves are needle-like, short, light blue-green, turning bright yellow before they fall in the autumn, leaving the pale pinkish-brown shoots bare until the next spring. The needles are produced spir ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cliff Copper Company
In geography and geology, a cliff is an area of rock which has a general angle defined by the vertical, or nearly vertical. Cliffs are formed by the processes of weathering and erosion, with the effect of gravity. Cliffs are common on coasts, in mountainous areas, escarpments and along rivers. Cliffs are usually composed of rock that is resistant to weathering and erosion. The sedimentary rocks that are most likely to form cliffs include sandstone, limestone, chalk, and dolomite. Igneous rocks such as granite and basalt also often form cliffs. An escarpment (or scarp) is a type of cliff formed by the movement of a geologic fault, a landslide, or sometimes by rock slides or falling rocks which change the differential erosion of the rock layers. Most cliffs have some form of scree slope at their base. In arid areas or under high cliffs, they are generally exposed jumbles of fallen rock. In areas of higher moisture, a soil slope may obscure the talus. Many cliffs also featur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
