382:
27:
19:
260:
198:, which estimated that there are an additional 16 million pounds (7300 metric tons) of uranium oxide resource remaining in the mine. In 2024, the Colorado Department of Natural Resources Division of Reclamation, Mining and Safety (DRMS) took the mine over from Colorado Legacy Land, LLC, which had acquired the mine from Cotter.
845:, produced 16,000 pounds (7.1 metric tons) of uranium oxide from 1955 to 1961. The Mike Doyle mine in El Paso County produced 280 pounds (130 kg) of uranium oxide from Dakota sandstone in 1955. Also in 1955, a Dakota sandstone mine in Larimer County produced 8 pounds of uranium along with some vanadium.
1082:
on
Colorado's eastern plains. In response to the proposed mining in Weld county, state lawmakers have put forward two proposals to more closely regulate uranium mining in Colorado; the first would require that mining companies prove that groundwater would not be adversely affected before mining could
758:
from 1953–1964 and 1976–1981. Ores were treated in a local ore mill, five miles (8.0 km) east-northeast of
Maybell, during the 1953–1964 period; during 1976–1981, ore was heap-leached, and the eluate trucked to Wyoming for uranium recovery. Total production of the district was 5.3 million
123:
The uranium boom of the late 1940s revived the search for uranium orebodies in the gold and silver mines of the Front Range. Again, uranium was produced from a number of mines, but the orebodies were small and discontinuous. Pitchblende was discovered in 1948 in the
Caribou silver mine at the town of
189:
of the
Schwartzwalder mine by himself, made the first ore shipment in 1953, and sold the mine in 1955. The Schwartzwalder mine was the source of more than 99% of the uranium produced from the Front Range. The mine operated until 1995, producing 17 million pounds (7700 metric tons) of uranium oxide.
824:
In
December 2006, the Australian company Black Range Minerals bought rights to mine the Taylor Ranch property, which the company describes as a 30-million pound uranium orebody that had been discovered in the late 1970s, but abandoned because of low uranium prices. The company plans an extensive
943:
If all goes according to
Powertech's proposed timeline, the process of obtaining government permits would extend through the end of 2009, after which the in-situ leaching would extract 800,000 pounds (360 metric tons) of uranium per year for ten years. The uranium would be stripped from the
939:
aligned roughly north-south over 11 miles. A consultant for
Powertech has estimated that the deposits contain identified reserves of 9.7 million pounds (4400 metric tons) of uranium oxide recoverable by in-situ and open-pit methods, with potential for another three to five million pounds.
1051:. If permitted and built, the mill would be the first new uranium mill built in the United States in 25 years. The US Bureau of Land Management has issued a "finding of no significant impact", which will allow Energy Fuels to start mining at its Whirlwind mine in
952:. The loaded resin beads would be trucked to an off-site facility for reprocessing and precipitation of uranium concentrate. Solution mining would move progressively from north to south, with remediation following mining as each orebody is mined out.
750:. Ore deposits are associated with faults, which are thought to have been pathways for reducing solutions from below. Ore was taken from numerous open-pit mines between two and three miles north of US Highway 40, between the towns of
56:
industry has seen booms and busts, but continues to this day. Not counting byproduct uranium from phosphate, Colorado is considered to have the third largest uranium reserves of any US state, behind
Wyoming and New Mexico.
369:
was present in the ore, newly discovered medical applications had made radium worth $ 100 per milligram (equivalent to $ 3,300 per milligram today), making the radium in the carnotite ore worth much more than the
64:
in
Colorado. However, price drops and financing problems in late 2008 have forced some companies to cancel or scale back uranium-mining projects. There are no currently producing uranium mines in Colorado.
217:
deposit that was worked unsuccessfully for zinc in 1920 and 1936. Prospectors found uranium at the abandoned mine in 1949, and it was worked for uranium from 1951 until 1953. The uranium occurs as
904:
in 1980. The Keota deposit was estimated to contain 5 to 10 million pounds (2300 to 4500 metric tons) of uranium oxide, but the project was halted because of low uranium prices.
863:
in 1969 when he noticed that cuttings from seismic shotholes were anomalously radioactive. Exploration in the 1970s defined a number of roll-front uranium deposits in the Upper
679:
counties, in 1955. Although the initial discoveries were uneconomic, they attracted further prospecting, which located commercial orebodies along the
Chester thrust fault of
541:
was mined from underground workings. The mine was reactivated as an open-pit uranium mine in 1951 and closed in 1952. The ore consisted of the uranium-vanadium minerals
924:, which had been explored in the 1970s by Rocky Mountain Energy. Powertech is currently evaluating the property for in-situ leaching using a leach solution of dissolved
170:
1768:
112:
in 1871. Pitchblende orebodies were also discovered in the Calhoun mine, the Kirk mine, and some others. About 122,000 pounds (55 metric tons) of uranium oxide (U
1037:
1075:
1044:
490:
2055:
546:
592:
Horizon Nevada Uranium Inc. has announced plans for exploration drilling in 2008 for uranium in the South Park Ranch area of southeast Park County.
1032:
There are a variety of active uranium mines in Colorado in the Ivan belt. One currently active uranium mine in the state is the Sunday mine near
755:
228:. Although the zinc skarn and the pitchblende vein are exposed in the same workings, the pitchblende appears to have been deposited much later.
1327:
Geology and Uranium-Vanadium Deposits in the Uravan Mineral Belt, Southwestern Colorado, in Ore Deposits of the United States, 1933–1967, Vol. 1
268:
1218:
Robert J. Wright and Donald L. Everhart (1960) Uranium, in Mineral Resources of Colorado First Sequel, Colorado Mineral Resources Board, p.349
1741:
998:
972:
2257:
2121:
1898:
2189:
479:
The Uravan mineral belt contains what was the last producing uranium mine in the state, the Topaz Mine, part of the Sunday Complex near
2184:
1928:
1626:
1560:
K.A. Dickinson, "Geologic controls of uranium mineralization in the Tallahassee Creek uranium district, Fremont County, Colorado,"
1531:
1193:
1737:
381:
2267:
2045:
1456:
1405:
1975:
1958:
2050:
1254:
1024:. Eight of the sites are former uranium ore mills, and seven are engineered permanent disposal sites for the mill tailings.
1017:
275:. It was the area most productive of uranium in the United States in the early 20th century. The mineral belt includes the
2216:
2211:
2007:
889:
plant from June 1977 to May 1978, successfully extracting uranium from a deposit in the Laramie Formation near the town of
349:
as early as 1903, on the basis of the anomalously high radioactivity of carnotite ores. But it was not until 1911 that the
2206:
1992:
1970:
1122:
1766:
1667:
2169:
1021:
2164:
1861:
493:
has applied for a permit to rehabilitate and begin pilot production at the Torbyn mine, a former uranium producer in
1268:
852:, produced 4500 pounds (2.1 metric tons) of uranium oxide from 1954 to 1956, as a byproduct of coal mining in the
294:
goes back to 1898, when a miner dug 10 tonnes (22,000 lb; 10,000 kg) of yellow ore that tested high in
135:
In 1949 janitor and weekend prospector Fred Schwartzwalder discovered uranium at an abandoned copper prospect in
1083:
begin; the second would assure that local governments have the power to set health and environmental standards.
120:) were shipped at irregular intervals from six gold mines in the Central City district from 1872 to about 1916.
2226:
2174:
1890:
1001:
is supervising cleanup of waste from previous operations. The mill still has a license to process uranium ore.
2262:
1329:. New York: The American Institute of Mining, Metallurgical, and Petroleum Engineers, Inc. pp. 805–813.
778:
and Wyoming Minerals defined two orebodies: the Hansen orebody, estimated to contain 12 million pounds of U
2012:
1982:
1921:
94:
2252:
1953:
426:
210:
2179:
2144:
1375:
Thirteenth Biennial Report of the Bureau of Mines of the State of Colorado, for the Years 1913 and 1914
1173:
Pitchblende Deposits at the Wood and Calhoun Mines Central City Mining District Gilpin County, Colorado
460:
were byproducts. The mines were forced out of business in 1923, when rich pitchblende deposits in the
248:
136:
98:
195:
2022:
1997:
1987:
1945:
1821:
1724:
1117:
1112:
1009:
676:
672:
609:
605:
434:
430:
429:
counties in Colorado. The carnotite was at first shipped to Europe for processing, but by 1913, the
422:
307:
1358:
Twelfth Biennial Report of the Bureau of Mines of the State of Colorado, for the Years 1911 and 1912
2195:
2116:
2040:
1965:
1102:
994:
975:
768:
240:
202:
129:
86:
82:
711:
are also present. Initial mining was by small open pits; underground mines were later developed.
1914:
1431:
1097:
1092:
724:
578:
90:
2017:
1127:
525:
in 1903, but the copper content was too low to mine. In 1919, prospectors discovered that the
206:
140:
109:
46:
1710:
1696:
2154:
2126:
1684:
1079:
1052:
917:
875:
860:
747:
522:
494:
418:
1573:
1047:
announced plans to build a uranium-vanadium processing mill in the Uravan district, west of
916:-based Powertech (USA) Inc. bought mineral rights and leases over the Centennial Project in
2201:
2086:
990:
276:
1653:
Hydrogeologic and Stratigraphic Data Pertinent to Uranium Mining, Cheyenne Basin, Colorado
8:
2231:
1107:
936:
897:
871:
767:
Surface radioactive anomalies led to uranium discoveries in 1954 at Tallahassee Creek in
236:
1745:
1711:
Colorado State University, Dept. of Environmental & Radiological Health Sciences:
1048:
949:
842:
684:
629:
613:
601:
414:
272:
271:
of uranium-vanadium deposits in San Miguel, Montrose, and Mesa counties, Colorado, and
244:
1409:
1524:
Geology and Production History of the Uranium Deposits in the Maybell, Colorado, Area
1255:"Cleanup company walks away from Jeffco uranium mine, state takes $ 7.3 million bond"
867:
853:
751:
720:
498:
284:
125:
2101:
1033:
1005:
890:
886:
849:
834:
680:
574:
480:
445:
398:
314:, where M. M. C. Friedel and E. Cumenge identified the new mineral that they named
280:
144:
60:
Uranium price increases from 2001 to 2007 prompted a number of companies to revive
1783:
2081:
2076:
2071:
1862:"Uranium worries in Weld County : Local News : The Rocky Mountain News"
1772:
1685:
Updated Technical Report on the Centennial Uranium Project. Weld County, Colorado
1671:
1640:
Promises & Problems of a "New" Uranium Mining Method: In Situ Solution Mining
1078:
is currently evaluating roll-front uranium deposits in its Centennial Project in
901:
191:
78:
959:(CARD), who point out that the Fox Hills Formation is an important water-supply
727:
was discovered in 1954 by an airborne radiation survey. Uranium was present as
2149:
1937:
925:
921:
518:
385:
General distribution of carnotite-bearing deposits in Four Corners region, 1952
185:. Schwartzwalder could interest no one in his discovery, so he drove the first
61:
1795:
1687:. (PDF). Powertech Uranium Corp. 25 February 2010. Retrieved on 19 March 2011.
1341:
Preliminary report on the radioactivity of the carnotite of southwest Colorado
73:
Hydrothermal uranium deposits are present through a widely spaced area in the
2246:
2091:
1664:
878:. They all occur along the southern margin of the Cheyenne sub-basin of the
668:
484:
461:
38:
30:
Holding ponds at Uranium processing mill in Uravan, Montrose county, Colorado
26:
18:
896:
Power Resources Corporation began in-situ mining the uranium deposit in the
821:. The source of uranium is thought to be the Oligocene Wall Mountain Tuff.
468:. Mining revived in 1935 when the price of vanadium rose, and boomed after
2159:
2096:
879:
838:
775:
469:
259:
151:
1445:
Geology of the Garo uranium-vanadium copper deposit, Park County, Colorado
1207:
Geology and uranium deposits of the Caribou Area, Boulder County, Colorado
600:
The Cochetopa mining district is about 20 miles (32 km) southeast of
1055:. The mine is projected to produce 250,000 pounds (110,000 kg) of U
700:
692:
640:
633:
570:
542:
358:
334:
232:
222:
218:
174:
167:
105:
74:
42:
2111:
2106:
1343:, Quarterly of the Colorado School of Mines, Oct. 1909, v.4, n.3, p. 1.
864:
817:
volcanic flows. Uranium is associated with carbonaceous material, and
732:
704:
648:
621:
558:
786:, and the Picnic Tree orebody, estimated to contain 1 million pounds U
2221:
1642:, Colorado Geological Survey, Environmental Geology 11, pp. 1, 18–19.
979:
913:
810:
795:
771:. Mining in the 1950s was by both underground and open-pit methods.
740:
736:
696:
652:
586:
566:
554:
550:
526:
514:
410:
390:
354:
342:
338:
315:
303:
163:
1608:, Colorado Geological Survey, Environmental Geology 12, p. 131-132.
945:
935:
The uranium occurs in a series of roll fronts in sandstones of the
799:
728:
708:
644:
617:
585:
age. The ore is associated with faulting-induced fractures in the
534:
453:
402:
371:
319:
299:
291:
182:
178:
148:
50:
448:
mineral belt of Colorado and Utah supplied about half the world's
1906:
1283:
Geology of the Copper King Uranium Mine, Larimer County, Colorado
989:
Lincoln Park, adjacent to the Cotter Corporation uranium mill at
960:
833:
Relatively small amounts of uranium ore have been mined from the
814:
744:
582:
562:
538:
530:
473:
457:
375:
323:
295:
225:
53:
1269:"Colorado Legacy Land – Schwartzwalder Mine (State of Colorado)"
1651:
Robert M. Kirkham, William O'Leary, and James W. Warner (1980)
929:
818:
807:
803:
688:
656:
636:
625:
510:
465:
449:
438:
394:
366:
350:
346:
330:
311:
159:
155:
154:
veins filling fracture zones oriented predominantly NNW-SSE in
22:
Underground uranium mining in Nucla, Montrose County, Colorado
1834:"Energy Fuels to build first U.S. uranium mill in 25 years",
362:
214:
1606:
Energy Resources of the Denver and Cheyenne Basins, Colorado
1619:
Uranium deposits: Northern Denver Julesburg Basin, Colorado
1229:
The Schwartzwalder uranium mine, Jefferson County, Colorado
406:
186:
1655:, Colorado Geological Survey, Information Series 12, p. 21
956:
267:
The 70-mile long (110 km) Uravan mineral belt is an
1394:, State of Colorado Mineral Resources Board, pp. 330–331.
1302:, State of Colorado Mineral Resources Board, pp. 352–353.
1796:
List of uranimum mill tailings (UMTRA) sites in Colorado
971:
Three former uranium mill sites in Colorado are current
1513:, State of Colorado Mineral Resources Board, p.343-347.
1231:, Mountain Geologist, Oct. 1965, v.2, n.4, pp. 183–191.
483:, which was closed down on 18 March 2009 by then owner
1874:
John Ingold, "Water-quality plans for mines offered,"
1665:
Powertech Uranium Corp. – Home Page – Sat Mar 19, 2011
759:
pounds (2.4 million kilograms) of uranium oxide.
659:. Extraction started in 1954, by underground mining.
333:
had been discovered in 1898, it had been derived from
1899:
Colorado Division of Reclamation, Mining and Safety:
1020:(UMTRA) sites in the state, under the purview of the
1004:
Uravan Uranium Project, at the now-abandoned town of
1674:. Powertechuranium.com. Retrieved on 19 March 2011.
825:drilling program in 2008 to delineate the orebody.
2056:List of inquiries into uranium mining in Australia
1713:Uranium Mining and Recovery Operations Information
1595:, Denver: Colorado Mineral Resources Board, p.363.
1205:F.B. Moore, W.S. Cavender, and E.P. Kaiser (1957)
813:, conglomerate, and in sediments interbedded with
1822:"Piñon Ridge sale completed - World Nuclear News"
1730:
1528:New Interpretations of Northwest Colorado Geology
2244:
1798:. Cdphe.state.co.us. Retrieved on 19 March 2011.
1697:Colorado Department of Health and Environment:
1551:, Colorado Mineral Resources Board, pp. 359–361.
1496:, Colorado Mineral Resources Board, pp. 357–359.
1479:, Colorado Mineral Resources Board, pp. 353–357.
1281:P.K. Sims, George Phair, and R.H. Moench (1958)
437:that had become the world's largest supplier of
1699:Permitting Status of Centennial Uranium Project
1587:Robert J. Wright and Donald L. Everhart (1960)
1543:Robert J. Wright and Donald L. Everhart (1960)
1505:Robert J. Wright and Donald L. Everhart (1960)
1488:Robert J. Wright and Donald L. Everhart (1960)
1471:Robert J. Wright and Donald L. Everhart (1960)
1386:Robert J. Wright and Donald L. Everhart (1960)
1294:Robert J. Wright and Donald L. Everhart (1960)
859:Rancher Solomon Schlagel discovered uranium in
537:, and about 40 tons of ore containing up to 1%
132:. A small amount of uranium ore was produced.
885:Wyoming Minerals Corporation operated a pilot
683:age. The deposits are about six-mile east of
1922:
1893:Uranium-It's Hot!! And Back by Popular Demand
1742:United States Environmental Protection Agency
1371:Radium plant of the Standard Chemical Company
973:United States Environmental Protection Agency
612:. Uranium was discovered in outcrops of the
2122:List of Nuclear-Free Future Award recipients
1738:"Lincoln Park | Region 8 | US EPA"
104:The first uranium identified in the USA was
2190:Uranium Mill Tailings Radiation Control Act
2185:Anti-nuclear movement in the United States
1929:
1915:
1847:"BLM Okays Energy Fuels' Whirlwind Mine,"
1593:Mineral Resources of Colorado First Sequel
1576:Taylor Ranch Uranium Project, Colorado USA
1549:Mineral Resources of Colorado First Sequel
1511:Mineral Resources of Colorado First Sequel
1494:Mineral Resources of Colorado First Sequel
1477:Mineral Resources of Colorado First Sequel
1392:Mineral Resources of Colorado First Sequel
1300:Mineral Resources of Colorado First Sequel
209:and five miles (8.0 km) northeast of
139:about ten miles (16 km) northeast of
1604:Robert M. Kirkham and L.R. Ladwig (1980)
1027:
662:
620:). Mineralization occurs in silicified (
205:about 25 miles (40 km) northwest of
1627:Rocky Mountain Association of Geologists
1532:Rocky Mountain Association of Geologists
1447:, US Geological Survey, Bulletin 1087-A.
1403:
1325:Motica, J.E. (1968). Ridge, John (ed.).
1285:, US Geological Survey, Bulletin 1132-D.
1209:, US Geological Survey, Bulletin 1030-N.
1194:Rocky Mountain Association of Geologists
986:Denver Radium Site, in Denver, Colorado.
957:Coloradoans Against Resource Destruction
955:Powertech's mining plans are opposed by
380:
258:
25:
17:
2046:List of countries by uranium production
1457:"Uranium mining planned in South Park,"
1315:, US Geological Survey, Bulletin 988-A.
966:
743:in tufaceous fluvial sandstones of the
433:had built a radium processing plant in
2245:
1324:
1149:, Mining Engineering, May 2006, p. 76.
254:
143:and eight miles (13 km) north of
2051:List of countries by uranium reserves
1910:
1339:Herman Fleck and William G. Haldane,
1244:, Mining Engineering, May 2001, p.68.
1175:, US Geological Survey, Circular 186.
1018:Uranium Mill Tailings Remedial Action
907:
703:igneous and metamorphic rocks. Some
595:
231:Other vein-type uranium mines in the
2217:The Navajo People and Uranium Mining
2212:History of the anti-nuclear movement
1623:Energy Resources of the Denver Basin
999:U.S. Environmental Protection Agency
893:. The aquifer was then remediated.
762:
413:-bearing sandstones of the Jurassic
2258:Uranium mining in the United States
2207:International Uranium Film Festival
1807:J. Burnell and others, "Colorado,"
1227:George R. Downs and Allan G. Bird,
1123:Uranium mining in the United States
714:
365:. Although no more than a trace of
45:ore was taken from gold mines near
13:
2170:Nuclear power in the United States
1936:
1313:Geology of the Uravan Mineral Belt
1171:F.B. Moore and C.R. Butler (1952)
1158:Mark Jaffe, "Mine woes run deep",
1022:United States Department of Energy
569:, and the copper-vanadium mineral
221:in a hydrothermal vein deposit in
14:
2279:
2165:Botanical prospecting for uranium
1884:
553:, along with the copper minerals
487:due to depressed uranium prices.
318:. The mineral was mined for its
243:, and the Wright Lease mine near
235:were the Fairday A. M. mine near
1901:Uranium Mining in Colorado, 2008
1868:
1854:
1841:
1828:
1814:
1801:
1789:
1777:
1760:
1718:
1704:
1690:
1677:
1658:
1645:
1632:
1611:
1598:
1581:
1567:
1554:
1537:
1516:
1499:
1482:
1465:
1450:
1437:
1424:
1397:
1380:
1363:
1346:
1333:
1318:
1311:R.P. Fischer and L.S. Hilpert,
1305:
1288:
1275:
1261:
848:The Leyden coal mine, north of
828:
687:. The orebodies are primarily
472:when the government stockpiled
2268:Geology of the Rocky Mountains
2227:1974 Elliot Lake miners strike
2175:Church Rock uranium mill spill
1247:
1240:J.W. Keller and C.J. Carroll,
1234:
1221:
1212:
1199:
1178:
1165:
1152:
1139:
837:along the western edge of the
476:for nuclear weapons programs.
263:Map of the Uravan Mineral Belt
68:
1:
1133:
504:
1891:Colorado Geological Survey:
1522:William L. Chenoweth (1986)
1434:, accessed 20 November 2009.
1354:Carnotite a supply of radium
1184:William L. Chenowith (1980)
774:Exploration in the 1970s by
667:Uranium was discovered near
397:, prospectors rushed to the
337:, and the radium content of
290:Uranium mining in southwest
7:
1086:
1063:and one million pounds of V
173:. The chief ore mineral is
108:from the Wood gold mine at
10:
2284:
2180:Sequoyah Fuels Corporation
2145:Uranium in the environment
1564:, Oct. 1981, v.18, n.4, p.
1369:Joseph M. Flannery (1914)
1016:In addition, there are 15
190:The mine was owned by the
147:. The deposit consists of
41:, goes back to 1872, when
35:Uranium mining in Colorado
2135:
2064:
2033:
1944:
1638:Robert M. Kirkham (1979)
1162:, 4 December 2008, p. B1.
1118:Uranium mining in Arizona
1113:Silver mining in Colorado
464:forced down the price of
431:Standard Chemical Company
345:was suspected to contain
308:Montrose County, Colorado
201:The Copper King mine, in
2196:The Return of Navajo Boy
2117:Floyd Red Crow Westerman
2041:List of uranium projects
1878:, 17 January 2008, p.5B.
1443:Verl R. Wilmarth (1959)
1103:List of uranium projects
976:National Priorities List
794:. Uranium is present as
1617:Harold L. Reade (1978)
1098:Gold mining in Colorado
1093:Coal mining in Colorado
841:. The Mann mine, near
452:from 1910 to 1922, and
405:and adjacent southeast
171:Idaho Springs Formation
1786:, Superfund sites, EPA
1784:Uravan Uranium Project
1727:, Superfund sites, EPA
1574:Black Range Minerals:
1562:The Mountain Geologist
1352:A. W. Forstall (1913)
1145:J. Keller and others,
1128:Uranium mining in Utah
1028:Current uranium mining
699:sedimentary rocks and
663:Marshall Pass district
386:
264:
110:Central City, Colorado
47:Central City, Colorado
31:
23:
2155:Uranium mining debate
2127:World Uranium Hearing
1053:Mesa County, Colorado
861:Weld County, Colorado
748:Browns Park Formation
639:. The veins contain
509:Prospectors examined
393:was known to contain
384:
357:was confirmed by the
262:
29:
21:
2263:Colorado Mining Boom
2202:Nuclear labor issues
1959:Kakadu National Park
1771:16 July 2011 at the
1670:23 July 2007 at the
1430:Energy Fuels, Inc.,
1076:Powertech (USA) Inc.
967:Environmental issues
628:) veins cutting the
310:, and shipped it to
302:out of a deposit at
177:, which occurs with
2232:Yellowcake boomtown
1851:, Nov. 2008, p. 10.
1838:, Sept. 2007, p.15.
1462:, 22 February 2008.
1257:. 18 December 2023.
1186:Uranium in Colorado
1108:O. Barlow Willmarth
937:Fox Hills Formation
898:Fox Hills Formation
872:Fox Hills Formation
255:Uravan mineral belt
2253:Mining in Colorado
1849:Mining Engineering
1836:Mining Engineering
1811:, May 2007, p. 77.
1809:Mining Engineering
1748:on 19 October 2012
1725:Denver Radium Site
1412:on 19 October 2013
1038:Piñon Ridge Mining
950:ion exchange resin
908:Centennial project
843:Morrison, Colorado
632:and the subjacent
630:Morrison Formation
614:Morrison Formation
596:Cochetopa district
415:Morrison Formation
387:
287:mining districts.
273:Grand County, Utah
265:
196:Cotter Corporation
32:
24:
2240:
2239:
1045:Energy Fuels Inc.
868:Laramie Formation
854:Laramie Formation
798:, coffinite, and
763:Tallahassee Creek
675:and southeastern
651:, with accessory
491:Energy Fuels Inc.
279:, Gypsum Valley,
211:Red Feather Lakes
2275:
2102:Yvonne Margarula
1931:
1924:
1917:
1908:
1907:
1879:
1872:
1866:
1865:
1858:
1852:
1845:
1839:
1832:
1826:
1825:
1818:
1812:
1805:
1799:
1793:
1787:
1781:
1775:
1764:
1758:
1757:
1755:
1753:
1744:. Archived from
1734:
1728:
1722:
1716:
1708:
1702:
1694:
1688:
1681:
1675:
1662:
1656:
1649:
1643:
1636:
1630:
1615:
1609:
1602:
1596:
1585:
1579:
1571:
1565:
1558:
1552:
1541:
1535:
1520:
1514:
1503:
1497:
1486:
1480:
1469:
1463:
1454:
1448:
1441:
1435:
1428:
1422:
1421:
1419:
1417:
1408:. Archived from
1406:"Sunday Complex"
1401:
1395:
1384:
1378:
1367:
1361:
1350:
1344:
1337:
1331:
1330:
1322:
1316:
1309:
1303:
1292:
1286:
1279:
1273:
1272:
1265:
1259:
1258:
1251:
1245:
1238:
1232:
1225:
1219:
1216:
1210:
1203:
1197:
1190:Colorado Geology
1182:
1176:
1169:
1163:
1156:
1150:
1143:
887:in-situ leaching
850:Golden, Colorado
835:Dakota Sandstone
715:Maybell district
695:replacements of
575:Maroon Formation
517:a mile south of
481:Uravan, Colorado
399:Colorado Plateau
341:was not known.
326:as a byproduct.
249:Jefferson County
137:Jefferson County
2283:
2282:
2278:
2277:
2276:
2274:
2273:
2272:
2243:
2242:
2241:
2236:
2137:
2131:
2082:Katsumi Furitsu
2077:Kevin Buzzacott
2072:Thomas Banyacya
2060:
2029:
1940:
1935:
1887:
1882:
1873:
1869:
1860:
1859:
1855:
1846:
1842:
1833:
1829:
1820:
1819:
1815:
1806:
1802:
1794:
1790:
1782:
1778:
1773:Wayback Machine
1765:
1761:
1751:
1749:
1736:
1735:
1731:
1723:
1719:
1709:
1705:
1695:
1691:
1682:
1678:
1672:Wayback Machine
1663:
1659:
1650:
1646:
1637:
1633:
1616:
1612:
1603:
1599:
1586:
1582:
1572:
1568:
1559:
1555:
1542:
1538:
1521:
1517:
1504:
1500:
1487:
1483:
1470:
1466:
1455:
1451:
1442:
1438:
1432:Tenderfoor Mesa
1429:
1425:
1415:
1413:
1402:
1398:
1385:
1381:
1368:
1364:
1351:
1347:
1338:
1334:
1323:
1319:
1310:
1306:
1293:
1289:
1280:
1276:
1267:
1266:
1262:
1253:
1252:
1248:
1239:
1235:
1226:
1222:
1217:
1213:
1204:
1200:
1183:
1179:
1170:
1166:
1157:
1153:
1144:
1140:
1136:
1089:
1074:Canadian-based
1070:
1066:
1062:
1058:
1030:
1010:Montrose County
969:
910:
902:Keota, Colorado
831:
793:
789:
785:
781:
765:
717:
665:
610:Gunnison County
598:
547:metatyuyamunite
507:
435:Montrose County
257:
192:General Atomics
119:
115:
79:Rocky Mountains
71:
12:
11:
5:
2281:
2271:
2270:
2265:
2260:
2255:
2238:
2237:
2235:
2234:
2229:
2224:
2219:
2214:
2209:
2204:
2199:
2192:
2187:
2182:
2177:
2172:
2167:
2162:
2157:
2152:
2150:Uranium market
2147:
2141:
2139:
2133:
2132:
2130:
2129:
2124:
2119:
2114:
2109:
2104:
2099:
2094:
2089:
2084:
2079:
2074:
2068:
2066:
2062:
2061:
2059:
2058:
2053:
2048:
2043:
2037:
2035:
2031:
2030:
2028:
2027:
2026:
2025:
2020:
2015:
2010:
2005:
2000:
1990:
1985:
1980:
1979:
1978:
1973:
1963:
1962:
1961:
1950:
1948:
1942:
1941:
1938:Uranium mining
1934:
1933:
1926:
1919:
1911:
1905:
1904:
1896:
1886:
1885:External links
1883:
1881:
1880:
1867:
1853:
1840:
1827:
1813:
1800:
1788:
1776:
1759:
1729:
1717:
1703:
1689:
1676:
1657:
1644:
1631:
1629:, pp. 161–171.
1610:
1597:
1580:
1566:
1553:
1536:
1534:, pp. 289–295.
1515:
1498:
1481:
1464:
1460:Fairplay Flume
1449:
1436:
1423:
1404:Energy Fuels.
1396:
1379:
1377:, pp. 113–116.
1362:
1345:
1332:
1317:
1304:
1287:
1274:
1260:
1246:
1233:
1220:
1211:
1198:
1177:
1164:
1151:
1137:
1135:
1132:
1131:
1130:
1125:
1120:
1115:
1110:
1105:
1100:
1095:
1088:
1085:
1068:
1064:
1060:
1056:
1029:
1026:
1014:
1013:
1002:
995:Fremont County
987:
968:
965:
926:carbon dioxide
922:Nunn, Colorado
909:
906:
830:
827:
806:and Oligocene
791:
787:
783:
779:
769:Fremont County
764:
761:
716:
713:
664:
661:
597:
594:
506:
503:
361:laboratory in
256:
253:
241:Boulder County
203:Larimer County
130:Boulder County
117:
113:
70:
67:
62:uranium mining
9:
6:
4:
3:
2:
2280:
2269:
2266:
2264:
2261:
2259:
2256:
2254:
2251:
2250:
2248:
2233:
2230:
2228:
2225:
2223:
2220:
2218:
2215:
2213:
2210:
2208:
2205:
2203:
2200:
2198:
2197:
2193:
2191:
2188:
2186:
2183:
2181:
2178:
2176:
2173:
2171:
2168:
2166:
2163:
2161:
2158:
2156:
2153:
2151:
2148:
2146:
2143:
2142:
2140:
2134:
2128:
2125:
2123:
2120:
2118:
2115:
2113:
2110:
2108:
2105:
2103:
2100:
2098:
2095:
2093:
2092:Jacqui Katona
2090:
2088:
2085:
2083:
2080:
2078:
2075:
2073:
2070:
2069:
2067:
2063:
2057:
2054:
2052:
2049:
2047:
2044:
2042:
2039:
2038:
2036:
2032:
2024:
2021:
2019:
2016:
2014:
2011:
2009:
2008:Navajo Nation
2006:
2004:
2001:
1999:
1996:
1995:
1994:
1993:United States
1991:
1989:
1986:
1984:
1981:
1977:
1974:
1972:
1969:
1968:
1967:
1964:
1960:
1957:
1956:
1955:
1952:
1951:
1949:
1947:
1943:
1939:
1932:
1927:
1925:
1920:
1918:
1913:
1912:
1909:
1903:
1902:
1897:
1895:
1894:
1889:
1888:
1877:
1871:
1863:
1857:
1850:
1844:
1837:
1831:
1823:
1817:
1810:
1804:
1797:
1792:
1785:
1780:
1774:
1770:
1767:
1763:
1747:
1743:
1739:
1733:
1726:
1721:
1715:
1714:
1707:
1701:
1700:
1693:
1686:
1683:W. Cary Voss
1680:
1673:
1669:
1666:
1661:
1654:
1648:
1641:
1635:
1628:
1624:
1620:
1614:
1607:
1601:
1594:
1590:
1584:
1578:
1577:
1570:
1563:
1557:
1550:
1546:
1540:
1533:
1529:
1525:
1519:
1512:
1508:
1502:
1495:
1491:
1485:
1478:
1474:
1468:
1461:
1458:
1453:
1446:
1440:
1433:
1427:
1411:
1407:
1400:
1393:
1389:
1383:
1376:
1372:
1366:
1359:
1355:
1349:
1342:
1336:
1328:
1321:
1314:
1308:
1301:
1297:
1291:
1284:
1278:
1270:
1264:
1256:
1250:
1243:
1237:
1230:
1224:
1215:
1208:
1202:
1195:
1191:
1187:
1181:
1174:
1168:
1161:
1155:
1148:
1142:
1138:
1129:
1126:
1124:
1121:
1119:
1116:
1114:
1111:
1109:
1106:
1104:
1101:
1099:
1096:
1094:
1091:
1090:
1084:
1081:
1077:
1072:
1054:
1050:
1046:
1041:
1039:
1035:
1025:
1023:
1019:
1011:
1007:
1003:
1000:
996:
992:
988:
985:
984:
983:
981:
977:
974:
964:
962:
958:
953:
951:
947:
941:
938:
933:
931:
927:
923:
919:
915:
905:
903:
899:
894:
892:
888:
883:
881:
877:
873:
869:
866:
862:
857:
855:
851:
846:
844:
840:
836:
826:
822:
820:
816:
812:
809:
805:
801:
800:meta-autunite
797:
777:
772:
770:
760:
757:
753:
749:
746:
742:
738:
734:
730:
729:meta-autunite
726:
725:Moffat County
722:
712:
710:
706:
702:
698:
694:
690:
686:
682:
678:
674:
670:
669:Marshall Pass
660:
658:
654:
650:
646:
642:
638:
635:
631:
627:
623:
619:
615:
611:
608:and southern
607:
604:in northwest
603:
593:
590:
588:
584:
580:
579:Pennsylvanian
576:
572:
568:
564:
560:
556:
552:
548:
544:
540:
536:
532:
528:
524:
520:
516:
512:
502:
500:
497:just east of
496:
492:
488:
486:
485:Denison Mines
482:
477:
475:
471:
467:
463:
462:Belgian Congo
459:
455:
451:
447:
442:
440:
436:
432:
428:
424:
420:
416:
412:
408:
404:
401:of southwest
400:
396:
392:
383:
379:
377:
373:
368:
364:
360:
356:
352:
348:
344:
340:
336:
332:
327:
325:
321:
317:
313:
309:
305:
301:
297:
293:
288:
286:
282:
278:
274:
270:
261:
252:
250:
246:
242:
238:
234:
229:
227:
224:
220:
216:
212:
208:
204:
199:
197:
193:
188:
184:
180:
176:
172:
169:
165:
161:
157:
153:
150:
146:
142:
138:
133:
131:
127:
121:
111:
107:
102:
100:
96:
92:
88:
84:
80:
76:
66:
63:
58:
55:
52:
48:
44:
40:
39:United States
36:
28:
20:
16:
2194:
2160:Peak uranium
2097:Scott Ludlam
2002:
1900:
1892:
1875:
1870:
1856:
1848:
1843:
1835:
1830:
1816:
1808:
1803:
1791:
1779:
1762:
1750:. Retrieved
1746:the original
1732:
1720:
1712:
1706:
1698:
1692:
1679:
1660:
1652:
1647:
1639:
1634:
1622:
1618:
1613:
1605:
1600:
1592:
1588:
1583:
1575:
1569:
1561:
1556:
1548:
1544:
1539:
1527:
1523:
1518:
1510:
1506:
1501:
1493:
1489:
1484:
1476:
1472:
1467:
1459:
1452:
1444:
1439:
1426:
1414:. Retrieved
1410:the original
1399:
1391:
1387:
1382:
1374:
1370:
1365:
1357:
1353:
1348:
1340:
1335:
1326:
1320:
1312:
1307:
1299:
1295:
1290:
1282:
1277:
1263:
1249:
1241:
1236:
1228:
1223:
1214:
1206:
1201:
1189:
1185:
1180:
1172:
1167:
1159:
1154:
1146:
1141:
1073:
1042:
1031:
1015:
970:
954:
942:
934:
911:
895:
884:
880:Denver Basin
858:
847:
839:Denver Basin
832:
829:Denver Basin
823:
776:Cyprus Mines
773:
766:
723:district in
718:
671:in northern
666:
599:
591:
508:
489:
478:
470:World War II
443:
409:, and found
388:
328:
289:
269:arcuate zone
266:
230:
213:contained a
207:Fort Collins
200:
194:subsidiary
152:hydrothermal
141:Central City
134:
122:
103:
72:
59:
34:
33:
15:
1976:Elliot Lake
1876:Denver Post
1160:Denver Post
1080:Weld County
1036:, owned by
918:Weld County
876:Weld County
701:Precambrian
693:pitchblende
641:pitchblende
634:Precambrian
571:volborthite
543:tyuyamunite
523:Park County
495:Mesa County
359:Marie Curie
353:content of
335:pitchblende
233:Front Range
223:Precambrian
219:pitchblende
175:pitchblende
168:Precambrian
106:pitchblende
95:Clear Creek
75:Front Range
69:Front Range
43:pitchblende
2247:Categories
2112:Sun Xiaodi
2107:JoAnn Tall
2065:Opposition
2013:New Mexico
1983:Kazakhstan
1946:By country
1625:, Denver:
1530:, Denver:
1416:18 October
1192:, Denver:
1134:References
1071:per year.
991:Canon City
865:Cretaceous
733:uranophane
705:uranophane
649:uranophane
622:chalcedony
559:chalcocite
529:contained
505:South Park
427:San Miguel
277:Slick Rock
101:counties.
2222:Hibakusha
2087:Jim Green
1954:Australia
1196:, p. 217.
1043:In 2007,
982:) sites:
980:Superfund
914:Vancouver
912:In 2006,
811:sandstone
796:uraninite
741:coffinite
737:uraninite
697:Paleozoic
653:marcasite
587:sandstone
573:, in the
567:malachite
555:covellite
551:carnotite
527:sandstone
515:sandstone
513:-stained
411:carnotite
391:carnotite
355:carnotite
343:Carnotite
339:carnotite
329:Although
316:carnotite
304:Roc Creek
245:Ideledale
237:Jamestown
164:quartzite
99:Jefferson
2138:articles
2003:Colorado
1971:Bancroft
1769:Archived
1668:Archived
1242:Colorado
1147:Colorado
1087:See also
1049:Naturita
946:leachate
709:autunite
685:Sargents
681:Laramide
677:Gunnison
673:Saguache
645:autunite
618:Jurassic
606:Saguache
602:Gunnison
535:vanadium
454:vanadium
423:Montrose
403:Colorado
372:vanadium
320:vanadium
300:vanadium
292:Colorado
183:ankerite
179:adularia
149:Tertiary
51:Colorado
2023:Wyoming
1998:Arizona
1988:Namibia
1752:13 July
1589:Uranium
1545:Uranium
1507:Uranium
1490:Uranium
1473:Uranium
1388:Uranium
1360:, p.48.
1296:Uranium
997:. The
961:aquifer
815:Miocene
808:arkosic
752:Maybell
745:Miocene
721:Maybell
583:Permian
563:azurite
539:uranium
531:uranium
499:Gateway
474:uranium
458:uranium
376:uranium
324:uranium
322:, with
296:uranium
285:Gateway
226:granite
166:of the
126:Caribou
87:Boulder
83:Larimer
77:of the
54:uranium
49:. The
2136:Other
1966:Canada
1034:Uravan
1006:Uravan
948:using
930:oxygen
891:Grover
819:pyrite
804:Eocene
739:, and
689:pyrite
657:barite
637:schist
626:quartz
565:, and
549:, and
511:copper
466:radium
450:radium
446:Uravan
439:radium
425:, and
395:radium
367:radium
351:radium
347:radium
331:radium
312:France
283:, and
281:Uravan
162:, and
160:schist
156:gneiss
145:Golden
97:, and
91:Gilpin
2034:Lists
1591:, in
1547:, in
1509:, in
1492:, in
1475:, in
1390:, in
1373:, in
1356:, in
1298:, in
1188:, in
1008:, in
920:near
389:Once
363:Paris
215:skarn
81:, in
2018:Utah
1754:2007
1526:in,
1418:2013
928:and
870:and
754:and
719:The
707:and
691:and
655:and
647:and
624:and
533:and
519:Garo
456:and
444:The
419:Mesa
407:Utah
298:and
187:adit
181:and
1621:in
993:in
900:at
874:in
802:in
756:Lay
577:of
521:in
417:in
374:or
306:in
247:in
239:in
2249::
1740:.
1040:.
963:.
932:.
882:.
856:.
735:,
731:,
643:,
589:.
561:,
557:,
545:,
501:.
441:.
421:,
378:.
251:.
158:,
128:,
93:,
89:,
85:,
37:,
1930:e
1923:t
1916:v
1864:.
1824:.
1756:.
1420:.
1271:.
1069:5
1067:O
1065:2
1061:8
1059:O
1057:3
1012:.
978:(
792:8
790:O
788:3
784:8
782:O
780:3
616:(
581:-
118:8
116:O
114:3
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
