Research and Consulting - Fortymile Gold

These operations are producing several thousand ounces of gold annually. We have acted as consultants to set up a mining operation of this type in Alaska. *We have experimented with the concept of applying floater dredging technology to the mining of frozen placer gravel deposits in permafrost areas.

Placer Gold Mining Methods - Mineral Processing & Metallurgy

Oct 26, 2016· placer mining equipment. How to Recover Gold from Placers in Mining. The gravel obtained from any placer deposit is, with exceptions, ultimately all treated alike, but the mode of winning the dirt varies with the necessities of the case. On flats and bars, the surface gravel, if rich enough, is loosened with pick and shovel, and then washed.

OF GOLD AND GRAVEL - Alaska Historical Society

Creek's old-timers and formed a new mining company—Gold Placers, Inc.—with Patty as general manager. Just as McRae had predicted, President Roosevelt passed the Gold Reserve Act on January 30, 1934, which raised the price of gold from $20 to $35 an ounce as part of an effort to combat the depression and stabilize the value of the dollar.


Alaska, has been the scene of placer gold mining since 1906 and has pro-duced more than 100,000 tr oz of gold and several hundred tons of byproduct tin, in the form of placer cassiterite. Although open-cut mining methods are currently employed, drift-mining methods were formerly utilized to mine the gold- and tin-bearing gravels.

Placer mining — Wikipedia Republished // WIKI 2

Apr 22, 2019· Placer mining / ˈ p l æ s ər / is the mining of stream bed deposits for minerals.This may be done by open-pit (also called open-cast mining) or by various surface excavating equipment or tunnelling equipment.. Placer mining is frequently used for precious metal deposits (particularly gold) and gemstones, both of which are often found in alluvial …


Drill logs of the property and mining operations upstream indicate that the mine sections are composed of 12-30 feet of frozen organic silt (with virtually no ice lenses or wedges) overlying from 35 to 50 feet of thawed coarse gravel. The upper 10-15 feet of gravel is relatively barren of placer gold and is regarded as gravel overburden.


fuel, and foodstuffs was felt severely in all mining operations. It is estimated that the cost of production in 1918 was 30 to 40 per cent ... Placer gold produced in Seward Peninsula, 1918, by methods of mining. Method. Number of mines. Number of men em­ ... frozen muck and gravel is a recent development that promises to be.

United States Smelting, Refining, and Mining Company ...

Depicts the activities of a large placer gold mining operation in interior Alaska, offering incidentally scenes of life in and around post-World War 2 Fairbanks ... Refining, and Mining Co. in order to devise a means of lowering the cost of thawing permanently frozen gravels to 10 cents per cubic yard or less. Preliminary field testing to ...

frozen placer gold mining operations -

Frozen Placer Gold Mining Operations - Patented Turn-key Placer Gold Mine - Boulder Patch Mines. View this Placer Mining Turn Key Operation For Sale in Sumpter Oregon! ... Placer Gold Mining Operation ~ complete with equipment.

Otter Creek (ARDF #ID111) Ag, Au

Otter Creek is the second largest producer of placer gold in the Iditarod district; the largest is Flat Creek (ID104), one of its tributaries (Bundtzen and others, 1992). The placers in Otter Creek has been mined for about 4 miles; the deposit averages about 0.5 mile wide and reaches a maximum width of about 0.8 mile at its lower end near Flat.


vial diamond mining and exploration due to the relatively high specific grav- ity of gold (15-19) vs. diamond and kirnberlite indicator minerals (3.2-3.5). An unknown number of diamonds have probably been discharged with the tailings during placer-mining operations on Crooked Creek over the last few years.


existing tunnel thrdugh the placer-gold bearing f cozen gravel into . bedrodt (Figure 2). During the same period of time, three rwms were also excavated in the gravel deposit which overlies bedrock. The openings are accessible and have been well maintained in a frozen state since excavation. The materials and types of ground ice are

Alaska Gold Mine Museum - Gold Rush History | Gold Daughters

Hardrock gold mining is the method that is used when gold is trapped inside a rock. The rocks must be crushed and blended with chemicals to extract the gold. Placer mining occurs when gold has eroded out of its source rock. For placer mining, only gravity and water are required. Gold panning is used to recover placer gold.

Largest Gold Mine In North America

Apr 16, 2019 The Reed Gold Mine in Cabarrus County, North Carolina, southwest of Georgeville, produced about 50,000 troy ounces 1,600 kg of gold from deposits of lode and placer. Gold was produced in 15 districts, nearly all of them in the states Piedmont region. The total production of gold is estimated at 1.2 million ounces of troy 37.3 tonnes.

Rivers of Gold Placer Mining in Alaska - USGS

As placer-mining methods evolved, concerns about environmental effects led to changes in the gold-mining practices and regulations used in Alaska. In 1980, the price of gold on the world market had risen sharply and reached an all-time high of $850 per ounce, creating an economic in­ centive that resulted in a large increase in placer mining ...

Placer Gold Mining a Major Threat to Russia's Rivers

Jul 23, 2021· One of the last placer gold mining operations in the Chinese Small Khingan mountains. Along its border with Russia, China has significantly stopped placer mining. Photo by Eugene Simonov. Placer gold mining equipment in a remote taiga stream in the Jewish autonomous region in the Amur River Basin. The equipment was likely moved across the ...

Placer mining operations, 1960s - YouTube

Nov 16, 2017· Miner Bob Young pans for gold at his placer mine in Southcentral Alaska during the late 1960s or early 1970s. He pans for gold, pushes soil into a sluice box...

Alaska Placer Mining Operations and Claims 2020

Alaska Placer Mining Operations and Claims Operator's Guide F. or anyone who owns, leases, or has an interest in placer mining claims in Alaska. October 2020 Update. ... with hand tools and gold pans. 2. Notice Level Operations are operations that are exploratory in nature, will result in a cumulative surface disturbance of 5 ...

Gold In Tailing Piles – BC Gold Adventures

Many old-timers and even more modern miners lost a remarkable amount of gold in their mining operations. Some tailing piles contain fortunes in lost gold values if identified and properly reworked with modern mining methods. Lode or hard rock tailings and mine dumps can be very productive sources of gold specimens, as many times good…


Greene on behalf of Green Resources LLC, seeking approval of gold mining operations on 22 the five placer mining claims of Davis Creek Mine. The Plan was submitted using the State of Alaska's Multi-Agency Application for Permits to Mine in Alaska (APMA) for Placer Mining. The Plan envisioned that mining operations would occur on all five placer 24


Placer mining is a collection of mining methods that use water to separate valuable ore from the surrounding sediment. Placer mining literally began as a flash in the pan, flecks of gold awash in a slurry of sediment, recovered by miners using a skilled hand with only a pan the size of a dinner plate and river water.

Placer Gold Deposits of Nevada – Western Mining History

Most of the placer mining was done before 1900 by small-scale methods utilizing portable equipment, such as rockers, sluices, and drywashers, to work small deposits; most of the placer gold produced in the State since 1900 was mined by a few very large dredge operations between 1920 and 1959.

Industrial Mining at Coal Creek - Yukon - Charley Rivers ...

The industrialization of gold placer mining along the Yukon River corridor demanded tremendous ingenuity and capital investment. Before the arrival of gold dredges like the one at Coal Creek (and its twin in neighboring Woodchopper Creek), miners worked mostly with hand tools, sluice boxes, and small steam boilers for thawing permanently frozen ...

Steam Point Chisel Bit - Gold Placers, Inc — Google Arts ...

This object was collected from the mining office at Coal Creek CampIt represents the earliest days of the Gold Placers, Inc. industrial placer gold dredge mining operation in the Coal Creek Valley. Early mining efforts tried to speed up the dredging operation by thawing the permanently frozen gravels using steam.


Klondike, Indian River, Scroggie and Sixtymile gold fields, the main method of placer mining was by hand, hydraulic monitoring and dredging operations. This method moved gold-bearing gravels through a sluice box to recover the high-density raw gold. In addition, it was necessary to thaw frozen muck

The Treasure in Gold Mines: Fossils! – Yukon Paleontology ...

Jan 25, 2015· The Treasure in Gold Mines: Fossils! – Yukon Paleontology, Part 2. I admit to having preconceived notions of what it means to find fossils and to mine for gold . It never occurred to me that these two occupations might be interconnected. Nor would I have ever described the image below as what it actually is: placer gold mining.

» The Basics of Successful Gold Mining-Part 1

Gold deposits along the general gold path can be small or large, depending upon the size of the gold trap. The most important type of gold trap in river mining is called the "pay-streak". Pay-streaks always form along the gold path where the river's flow slows down on a large scale during a major flood storm.

Placer mining - Wikipedia

Placer mining / ˈ p l æ s ər / is the mining of stream bed deposits for minerals.This may be done by open-pit (also called open-cast mining) or by various surface excavating equipment or tunneling equipment.. Placer mining is frequently used for precious metal deposits (particularly gold) and gemstones, both of which are often found in alluvial deposits—deposits of sand and …

Browse Articles | ICMJs Prospecting & Mining Journal

April 2013. Federal and state regulatory agencies often cite mercury and methyl mercury in our waterways as a major factor for further restrictions on placer mining, and on suction gold dredge mining, in particular. However, these regulatory agencies are minimizing selenium and its neutralizing effects. 2. 3.