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Topic: Colorado Mineral Belt


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In the News (Thu 23 May 19)

  
  Colorado Geology Overview
The Cheyenne Belt, the 1.78 Ga suture between the Green Mountain arc and the Archean Wyoming Province craton, barely grazes the NW corner of Colorado.
Colorado's oldest exposed rocks are hard, resistant granites and metamorphic rocks added to the continent in the protracted Colorado Orogeny lasting from 1.78-1.65 Ga (14:30-15:12 h), and these make up most of the basement in Colorado today.
Colorado has been far removed from active plate boundaries since at least 1.6 Ga, but far-field stresses from distant plate interactions to the west, south and east continued to find expression in the Colorado Province mobile belt by exploiting persistent weaknesses left over from its assembly.
www.cliffshade.com /colorado/geo_overview.htm   (10393 words)

  
  Colorado Mineral Belt - Wikipedia, the free encyclopedia   (Site not responding. Last check: 2007-10-26)
The Colorado Mineral Belt (CMB) is a broad area stretching north-east from the San Juan Mountains in Southwestern Colorado to the Front Range near Boulder, Colorado which is highly mineralized.
The CMB is most famous for gold; over 25 million troy ounces (778 t) of the metal have been extracted from the area.
Major historic sites of mining in the Belt included Central City in the Front Range, west of Denver (4.2 million troy ounces (131 t) of gold 1859-1960); Leadville on the Arkansas River, gold was found there in the 1860s but the richer lead, silver and zinc lodes found from 1874 prompted more activity.
www.northmiami.us /project/wikipedia/index.php/Colorado_Mineral_Belt   (352 words)

  
 Mineral   (Site not responding. Last check: 2007-10-26)
Colorado Mineral Belt The Colorado Mineral Belt (CMB) is a broad area stretching north-east from the Cripple Creek Distr...
Mineral, Illinois Mineral is a village located in 2000 census, the village had a total population of 272.
Mineral, Virginia Mineral is a town located in 2000 census, the town had a total population of 424.
www.brainyencyclopedia.com /topics/mineral.html   (521 words)

  
 Historic Mines
Likewise, the historically-significant silver deposits of Custer County lie to the east of the Colorado Mineral Belt and are younger in age.
Mineralization in the Silver Cliff District is associated with Tertiary (approximately 26 to 32 million years old) volcanic rocks, primarily rhyolitic in composition.
The mineralized rocks and fractures were flened with manganese oxide and iron oxide coatings, and it was the experience of early miners that silver did not occur outside the stained zones.
www.uni.edu /~andersow/historicmines.html   (1760 words)

  
 Colorado - Open Encyclopedia   (Site not responding. Last check: 2007-10-26)
As of the 2000 census, Colorado's population is 4,301,261.
East of the Front Range of the Rocky Mountains are the Colorado Eastern Plains, the section of the Great Plains within Colorado at elevations ranging from 3500 to 7000 ft (1,000 to 2,000 m).
The Colorado Mineral Belt stretching from the San Juan Mountains in the southwest to Boulder and Central City on the front range contains the historic gold and silver mining districts of Colorado.
open-encyclopedia.com /Colorado   (1346 words)

  
 Colorado Information - Hometown USA
As of the 2000 census, Colorado's population is 4,301,261.
The Colorado Mineral Belt stretching from the San Juan Mountains in the southwest to Boulder and Central City on the front range contains the historic gold and silver mining districts of Colorado.
The northwestern corner of Colorado bordering Northern Utah and Western Wyoming is mostly sparsely populated rangeland.
www.hometownusa.com /co   (1898 words)

  
 Colorado Mineral Belt Information   (Site not responding. Last check: 2007-10-26)
Colorado is best known as the home of the highest peaks of the Rocky Mountains, which dominate the western half of the state; eastern Colorado is largely plains.
The Colorado Territory was organized as a Political divisions of the United StatesUnited States territory on February 28, 1861 and Colorado attained statehood in 1876 (earning it the moniker the "Centennial State").
To the west of the continental divide is the Western Slope of ColoradoWestern Slope.
www.echostatic.com /Colorado_Mineral_Belt.html   (1437 words)

  
 Active Mines in Colorado
Ore minerals occur in veins, fracture zones, and breccias in a quartz latite porphyry intrusive related to the Summitville and Platoro calderas.
Ferberite, a tungsten-bearing mineral, was the principal ore mineral.
In 1973, Colorado passed legislation that prohibits local governments from approving land uses that would interfere with the extraction of a commercial mineral deposit (C.R.S. Local governments are also required to conduct a study of commercial mineral deposits located within their jurisdictions and develop a master plan (C.R.S. for the extraction of mineral deposits.
geosurvey.state.co.us /Default.aspx?tabid=178   (2005 words)

  
 Colorado Mineral Belt - Wikipedia, the free encyclopedia   (Site not responding. Last check: 2007-10-26)
The CMB is most famous for gold; over 25 million ounces (778 t) of the metal have been extracted from the area.
Further finds in 1859 prompted a gold rush lasting until 1867; over 1.25 million ounces (39 t) of gold were produced in those eight years.
Major historic sites of mining in the Belt included Central City in the Front Range, west of Denver (4.2 million ounces (131 t) of gold 1859-1960); Leadville on the Arkansas River, gold was found there in the 1860s but the richer lead, silver and zinc lodes found from 1874 prompted more activity.
www.encyclopedia-online.info /Colorado_Mineral_Belt   (310 words)

  
 Mineral Belt Trail, Leadville, Colorado rail trail historic mining bikeway
Mineral Belt Trail, Leadville, Colorado rail trail historic mining bikeway
The Mineral Belt Trail is a 12.5-mile all-season non-motorized wheelchair-accessible route with numerous trailheads and access points.
The Mineral Belt Trail Guide is available for $2 including postage and handling from LeadvilleUSA.com or from the Leadville/Lake County Area Chamber of Commerce, P.O. Box 861, Leadville, CO 80461 — (719) 486-3900 or (800) 933-3901; E-mail: leadville@LeadvilleUSA.com.
www.americantrails.org /nationalrecreationtrails/trailNRT/MineralBelt-CO.html   (525 words)

  
 Colorado Real Estate Listings, Colorado Homes for Sale, Colorado Condos, CO
Colorado is a western state in the central part of the country.
Colorado is best known as the home of the highest peaks of the Rocky Mountains, which dominate the western half of the state; eastern Colorado is mostly High Plains (prairie) and sparsely populated.
The state was named after the Spanish word "Colorado" which means "reddish colored" that presumably refers to the red sandstone formations in the area or reddish brown color of the Colorado River.
www.colorado-real-estate-listings.info   (915 words)

  
 Rocks & Minerals: Colorado barite   (Site not responding. Last check: 2007-10-26)
The "Colorado mineral belt" refers to a large, elongated, highly mineralized area running from Boulder County in the northeast diagonally across the state to the San Juan Mountains in the extreme southwestern corner.
Colorado barite has been found in crystals to as much as 4 inches on edge and in association with quartz, pyrite, siderite, calcite, sphalerite, chalcopyrite, galena, rhodochrosite, and several less common mineral species (Kelley 1946; Muntyan 1988b; Muntyan and Muntyan 1988).
Barite, one of the most desirable minerals from the mine, occurs as plates of gemmy golden-yellow crystals that are eagerly sought by mineral collectors.
www.findarticles.com /p/articles/mi_m0GDX/is_1998_July/ai_53288931   (1419 words)

  
 Mineral Deposit Studies in the Colorado Mineral Belt and Vicinity
The primary objective of this task is to provide information on the genesis, timing, character, and controls of the mineral deposits and the character of their host rocks in the northern half the COMB.
Using structural fabric analyses and paleostress modeling we were able to quantify the role of principal stress orientations in the formation of economic gold and silver fault-veins.
Cross cutting of mineralized veins and associated hydrothermal alteration by well developed brittle faults is shedding light on the history of mineral vein emplacement and how it relates to brittle faulting processes.
minerals.cr.usgs.gov /projects/colorado_assessment/t1st1.html   (680 words)

  
 Colorado Mineral Belt -- Facts, Info, and Encyclopedia article   (Site not responding. Last check: 2007-10-26)
The CMB is most famous for (A soft yellow malleable ductile (trivalent and univalent) metallic element; occurs mainly as nuggets in rocks and alluvial deposits; does not react with most chemicals but is attacked by chlorine and aqua regia) gold; over 25 million ounces (778 t) of the metal have been extracted from the area.
Further finds in 1859 prompted a (A large migration of people to a newly discovered gold field) gold rush lasting until 1867; over 1.25 million ounces (39 t) of gold were produced in those eight years.
The peak year of gold production in Colorado was 1900 and there are no major gold mines currently in operation in the CMB, leaving a number of sites as (A deserted town (especially in Western United States)) ghost towns.
www.absoluteastronomy.com /encyclopedia/c/co/colorado_mineral_belt.htm   (314 words)

  
 San Juan Mountains - Wikipedia, the free encyclopedia
The San Juan Mountains are a rugged mountain range in southwestern Colorado.
The area is highly mineralized (the Colorado Mineral Belt) and figured in the gold and silver mining industry of early Colorado.
The other side of the San Juans, the western slope of the continental divide, is drained by tributaries of the San Juan, Dolores and Gunnison rivers which all flow into the Colorado River.
en.wikipedia.org /wiki/San_Juan_Mountains   (376 words)

  
 History of the Mineral Belt Trail - mineralbelttrail.com   (Site not responding. Last check: 2007-10-26)
The Mineral Belt Trail was conceived in 1994, through a community effort to identify methods of mitigating impacts to natural and historic resources within the historic Leadville Mining District resulting from the cleanup of the California Gulch Superfund Site.
The Mineral Belt Trail was designed and laid out to capitalize on the full range of historic and cultural resources in Leadville and the adjacent mining district.
The Mineral Belt Trail has been listed as one of Colorado's "Top 10" mountain trails in a Denver Post survey, and has been nominated, at the request of the State of Colorado, for National Recreational Trail status.
www.mineralbelttrail.com /index.php?module=pagemaster&PAGE_user_op=view_page&PAGE_id=2&MMN_position=2:2   (731 words)

  
 [No title]   (Site not responding. Last check: 2007-10-26)
Colorado Mineral Belt Revisited-An Analysis of New Data by Anna Burack Wilson and P.K. Sims The three accompanying plates were presented as a poster session at the Geological Society of America's National meeting, October 29, 2002, in Denver, Colorado.
Based on detailed information on the location of the Tertiary intrusions and mineral deposits, and on the control provided by the Proterozoic structures, all superimposed using GIS data, a new outline of the Colorado Mineral Belt is proposed herein.
Plate 1 includes an index map showing the location of the Colorado Mineral Belt, the abstract text, and the map showing the Colorado Mineral Belt, Cretaceous-Tertiary intrusions and inferred batholiths, mineral districts, and metallic deposits that may be related to the Cretaceous-Tertiary intrusions.
pubs.usgs.gov /of/2003/ofr-03-046/00ReadMe.txt   (685 words)

  
 Geology of the Ashcroft Area   (Site not responding. Last check: 2007-10-26)
Colorado’s major north-south trending ranges, including the Sangre de Cristo, Wet, Sawatch, Ten Mile, Gore, Park, Front, and Mosquito mountains rose in great blocks, cracking and shifting along their margins.
Mineralized with lead, iron, copper, zinc, silver, and traces of gold, these dikes, sills and stocks also metamorphosed the Paleozoic sediments with which they came in contact.
Mineralized material pushed along faults and "leeched" into the sediments; particularly the lower Carboniferous (310-350 million years old) Leadville Limestone.
www.aspenhistory.org /geology.html   (326 words)

  
 Colorado Mineral Belt information - Search.com
The Colorado Mineral Belt (CMB) is a broad area stretching north-east from the San Juan Mountains in Southwestern Colorado to the Front Range near Boulder, Colorado which is highly mineralized.
The CMB is most famous for gold; over 25 million troy ounces (778 t) of the metal have been extracted from the area.
Major historic sites of mining in the Belt included Central City in the Front Range, west of Denver (4.2 million troy ounces (131 t) of gold 1859-1960); Leadville on the Arkansas River, gold was found there in the 1860s but the richer lead, silver and zinc lodes found from 1874 prompted more activity.
www.search.com /reference/Colorado_Mineral_Belt   (307 words)

  
 Browns Pass
The hike area lies within a mineralization belt running from the southwest part of Colorado, northeast to an area approaching Boulder, where it ends.
The type of deposits found in the Colorado Mineral Belt were created by hydrothermal activity.
In the Colorado mineral Belt, it had removed concealing layers of old weathered rock and soil, and left relatively fresh exposures of discolored and exposed mineralized zones which would attract prospectors thousands of years later.
home.earthlink.net /~colorado_hiking2/Browns_Pass/browns_pass.htm   (1432 words)

  
 Gold_Prospecting_site
The 250 mile long Colorado Mineral Belt cuts diagonally across central and southwestern Colorado, in the heart of the Rocky Mountains.
Elbert (14,431 feet) is the highest of many high peaks in the belt, all of which were glaciated during the Ice Age.
The old miners must have only been interested in the big pieces because there are considerable fines and flakes to be found.
geocities.com /gold_prospecting/gold_prospecting_Prospecting_Sites.html   (2838 words)

  
 Mineral Classics - Company History
"Mineral Classics", established in 1970, and located near Black Hawk, Colorado, is a leading company dedicated to supplying excellent quality mineral specimens to collectors, museums and anyone interested in the science and hobby of mineralogy.
Kosnar was born in Jersey City, New Jersey in 1946, and began collecting minerals and fossils as a youngster in June 1957.
Kosnar arrived in Colorado on May 5, 1970, where he met Clarence Coil and his son, David, who were longtime Colorado field collectors experienced in mining “Amazonite” from the Crystal Peak area.
www.minclassics.com /aboutus.html   (1552 words)

  
 ColoradoProspector - Home
A site for the small scale miner to conveniently find access to public land, open to prospecting in and around Colorado's mineral belt.
Colorado is known historically as a mining state.
Naturally attracting prospectors on vacation wanting to find a nugget, a little color in their pan, or maybe one of the many gem specimens Colorado is also known for.
www.coloradoprospector.com   (622 words)

  
 Colorado Mineral Belt   (Site not responding. Last check: 2007-10-26)
The Colorado Mineral Belt (CMB) is a broad area stretching from the San Juan Mountains in Southwestern Colorado to the Front Range near Boulder Colorado which is highly mineralized.
The CMB is most famous for gold ; over 25 million ounces (778 t) the metal have been extracted from the The gold deposits were first discovered in Further finds in 1859 prompted a gold rush lasting until 1867; over 1.25 million (39 t) of gold were produced in eight years.
The peak of gold production in Colorado was 1900 there are no major gold mines currently operation in the CMB leaving a number sites as ghost towns.
www.freeglossary.com /Colorado_Mineral_Belt   (398 words)

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