This manuscript is based on a geologic and topographic reconnaissance survey, made during the summer of 1903, of an important placer-gold district in the northeastern part of Seward Peninsula. The report is accompanied by a reconnaissance map by Mr. D. C. Witherspoon, topographer, under whose directions the field operations were carried …Web
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These sands contain titanium, zirconium, and rare earth elements, which are considered critical mineral resources. Such sands are present in areas from the …Web
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Uranium-and thorium-bearing placers_____ 4( Uranium-bearing placers_____ 41 ... The following analysts, all of the U.S. Geological Survey, have pro· vided information referred to in this report : Jerome Stone, Robert Meyrowitz, Esma Campbell, Robert S. Jones, John W. Adams, CharlesWeb
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Geographic coordinates. Geographic coordinates: -114.11911, 33.62923 (WGS84) Elevation. 457. Relative position. ABOUAT 6 MI SOUTHEAST OF QUARTZSITE. (click for info)Web
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Ash Canyon Placers. This location is part of the Arizona Mineral Industry Location System (AzMILS), an inventory of mineral occurences, prospects and mine locations in Arizona. Cochise869 is located in T24S R21E Sec 6 NW in the Miller Peak - 7.5 Min quad. This collection consists of various reports, maps, records and related materials acquired ...Web
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Paige, Sidney, and Knopf, Adolph, 1907, Reconnaissance in the Matanuska and Talkeetna basins, Alaska, with notes on the placers of the adjacent regions: U.S. Geological Survey Bulletin 314-F, p. 104-125.Web
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In addition, placers associated with gravels that are stream remnants from an older erosion cycle occur in the same general area. Much of the gold produced in Alaska was mined from placers. These deposits are widespread, occurring along many of the major rivers and their tributaries. ... U.S. Geological Survey, 1978, Suggestions for prospecting ...Web
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U.S. Geological Survey Bulletin 2209-L Version 1.0 U.S. Industrial Garnet By James G. Evans and Phillip R. Moyle ... (2006) mines are in northern Idaho (garnet placers; one mine), southeastern Montana (garnet placers; one mine), and eastern New York (unweathered bedrock; two mines). In Idaho, garnet is mined from Tertiary and (or) …Web
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GEOLOGICAL SURVEY BULLETIN 1356 A catalog of location~ geology~ and production with lists of annotated references ... placers, the Ophir silver lode, was discovered by Peter O'Reiley and Patrick McLaughlin in 1857 while digging a small water hole for placer mining in Six Mile Canyon (De Quille, 1891). ...Web
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Rock Creek Placers: Geographic coordinates. Geographic coordinates: -108.67768, 42.47066 (WGS84) Elevation ... F.C., 1948, PRELIMINARY REPORT ON THE GEOLOGY OF THE ATLANTIC CITY-SOUTH PASS MINING DISTRICT, WYOMING: U.S. GEOLOGICAL SURVEY OPEN-FILE REPORT 15, P. 63-65. Deposit. HAUSEL, W.D., …Web
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Thomason Placers. This location is part of the Arizona Mineral Industry Location System (AzMILS), an inventory of mineral occurences, prospects and mine locations in Arizona. Yavapai448 is located in T9N R5W Sec 24 C in the Sam Powell Peak - 7.5 Min quad. This collection consists of various reports, maps, records and related materials acquired ...Web
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Gold fineness ranges from 620 to 927, but it is difficult to attach any geologic significance to the fineness data. Most placer gold in the Fortymile River area has been recovered at, or near, the gravelbedrock contact. The lowermost 3.3 feet (1 meter) of gravel and the uppermost 1.6 feet (0.5 meter) of bedrock may contain as much as 80 to 90 ...Web
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The North Dakota Geological Survey was created by an act of the North Dakota Legislature in 1895. After more than 120 years, the Survey still serves as the primary source of geological information in the state. Its mission over the years has grown and is now three-fold: Investigate the geology of North Dakota. Administer regulatory programs and ...Web
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Sampling and Analysis. S.M. Gandhi, B.C. Sarkar, in Essentials of Mineral Exploration and Evaluation, 2016 9.3.6 Placer Sampling. Placer deposits being characteristically stratified with layers of mineral concentration, particularly in bedrock, sampling becomes a troublesome job. In the event that the placer concentrations are coarse in size, the …Web
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Geology and Placer-Gold Deposits Geology and Placer-Gold Deposits of the Jicarilla Mountains, Lincoln County, New Mexico By KENNETH SEGERSTROM and GEORGE …Web
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Arizona Placers. This location is part of the Arizona Mineral Industry Location System (AzMILS), an inventory of mineral occurences, prospects and mine locations in Arizona. Maricopa527 is located in T5N R3W Sec 1 S2 in the Wittmann - 7.5 Min quad. This collection consists of various reports, maps, records and related materials acquired by …Web
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placer deposit, natural concentration of heavy minerals caused by the effect of gravity on moving particles.When heavy, stable minerals are freed from their matrix by weathering processes, they are slowly washed downslope …Web
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Major- and trace-element composition of platinum group minerals and their inclusions from several Yukon placers. In: Yukon Exploration and Geology 2009, K.E. MacFarlane, L.H. Weston and L.R. Blackburn (eds.), Yukon Geological Survey, p. 185-196. ... Geological Survey of Finland, Report of Investigation 207 pp 64-67 ...Web
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An official website of the United States government. Here's how you knowWeb
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Rare earth element (REE) resources are currently of great interest because of their importance as raw materials for high-technology manufacturing. The REE-phosphates monazite (light REE enriched) and xenotime (heavy REE enriched) resist weathering and can accumulate in placer deposits as part of the heavy mineral …Web
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The Arizona Geological Survey is not responsible for the accuracy of the records, information, or opinions that may be contained in the files. The Survey collects, catalogs, ... Wilson, E. D., Gold Placers and Placering in Arizona, AMB Bull #168 1978, p. 52 USGS Walnut Grove Topo Map (Included in file) Also see: Hassayampa Gold Basin Placer ...Web
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geological survey w. c. mendenhall, director circular 8 ____q___ beach placers of the oregon coast by j. t. pardee washington 1934. united states department of the interior harold l. ickes, secretary geological survey w. c. mendenhall, director circular 8 0 beach placers of the oregon coast ...Web
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Geology of Placers. The geologic requirements for the formation of a placer deposit are a source of mixed minerals, one or more of which is valuable; a means of transportation and concentration; and a moderately small area of deposition. To have the necessary enhanced value, the volume of the source material must be reduced to a much smaller ...Web
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GEOLOGICAL SURVEY 90 90 15 15 15 86 84 84 84 93 93 95 95 95 95 95 12 26 30 95 93 33 20 55 75 Moscow Lewiston Coeur d'Alene Sandpoint BOISE ... Beach placers were mined in the southeastern United States, Australia, and elsewhere, and river placers ... cal surveys are expensive, but combined with new mapping such studies could help …Web
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Geological and Exploration Models of Beach Placer Deposits, Integrated from Case-Studies of Southern Australia. Author links open overlay panel Baohong Hou a, ... Pre-selected samples from in-situ radiometric surveys on the heavy mineral placers were studied further, for quantitative estimation of the abundance of radioactive elements …Web
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The district includes the Nome placer field (NM251), an area of composite alluvial and beach placers (NM252), and the main beach and marine abrasion placers (NM253). …Web
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The 'Greaterville Placers' file is part of the G. M. Colvocoresses mining collection. Colvocoresses was a mining engineer and metallurgist in Arizona. He was General Manager of Southwest Metals Company, Humboldt, AZ. It acquired Consolidated Arizona Smelting Company by the end of 1921.Web
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Exploration designed to locate heavy mineral placers in coastal environments should identify bedrock terranes containing abundant high-grade metamorphic rocks or …Web
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RS-48D Summary: Beach placers deposited within the Fox Hills Sandstone along the eastern flank of the Denver Basin contain minerals deemed critical in 2018 by the U.S. Department of the Interior. These marine beach …Web
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GEOLOGICAL SURVEY BULLETIN 1356 A catalog of location~ geology~ and production with lists of annotated references ... placers, the Ophir silver lode, was discovered by …Web
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