Back River Gold Project
Pre-feasibility and feasibility tailings management design, site-wide water balance, site-wide closure and reclamation plan, and closure cost estimate ... The Back River Gold Project consists of numerous gold deposits located in a remote region of southwestern Nunavut, Canada. The region is characterized by deep, continuous permafrost.
Geoenvironmental Study of Gold Mining Tailings in a …
A gold process plant tailings dam was characterized for surface water and solids tailings up to 2 m deep. Information was obtained using integrated hydrochemical, …
Legacy effects of historical gold mining on floodplains of an
The gold rush at the end of the nineteenth century in south-eastern Australia resulted in the mobilization and re-deposition of vast quantities of tailings that modified the …
Tectonics' bounty of gold
Gold has both economic and cultural significance to human societies but, as Liang Zhang and David Groves explain, we owe its presence in the Earth's crust to repeating cycles of plate tectonics.
River Valley Palladium Project
This acquisition increased the size of NAM's land position to 15,800 acres and its portion of the River Valley Deposit from 12 km to 16 km in strike length. ... Tailings and water management facilities: 57.3: EPCM: 19.9: Owners costs: 10: UG mine development and equipment: 37.1: Reclamation and closure: 16.3:
Alaska Mine Waste | U.S. Geological Survey
Scientist sieving a sample of gold placer tailings to analyze for critical mineral contents in Uhler Creek, a tributary to the South Fork of the Forty Mile River in east central Alaska.
Process effluents and mine tailings: sources, effects and management
Process effluents and mine tailings: sources, effects and management ...
Speciation and characterization of arsenic in gold ores and …
The Ketza River mine is a former gold mine located in south-central Yukon, Canada. The gold mineralization, which was discovered in 1954, is made up of two types of ore bodies: 189605 tons of sulfide ore grading 11.3 g/t Au and 495800 tons of oxide ore grading 18 g/t Au. ... The oxidation of sulfide minerals within tailings deposits can ...
Carson River Mercury Site — Overview
of Gold Canyon and on the flood plain of the Carson River, tailings may have been deposited in and around Dayton from other upgradient source areas. Samples were collected from soil, groundwater, air, and domestic produce; and exposure point concentrations were derived. In addition to the Dayton area, soil
Geotechnical Properties of Mine Tailings and …
deposited tailings across one storage with results varying from non-plastic silt (ML) to silty sand (SM). 1713. ... Gold tailings at eleven TSF's in Western Australia were assessed by the Australian Centre for Geomechanics (Newson and Fahey, 1998). A wide range of field and laboratory tests were carried out at these sites ...
An underexploited invisible gold resource in the Archean …
The tailings dumps originating from gold mining in South Africa's Witwatersrand still contain notable gold endowments. Most tailings reprocessing operations target a native gold fraction using ...
Recovery of Sulfur, Copper, and Gold by Reprocessing …
The old Bor flotation tailings were disposed of in the Bor River valley from 1933 to 1987 in two tailings ponds covering an area of approximately 1.6km2. The ponds contain 27 million metric tons of tailings with an average range of 0.2-0.3% copper and 0.3-0.6ppm of gold [25]. As part of the RIS-CuRE project [26], a
PROGRESSIVE RECLAMATION UTILIZING BIOSOLIDS AT …
Hedley Gold Tailings Project The Hedley Gold Tailings Project was a heap leach gold extraction mine that operated between 1988 and 1995. Tailings previously deposited by the historic Mascot and Nickel Plate mining operations were mined, agglomerated with cement, progressively stacked into a seven hectare heap through a series of
Tailings Disposal Systems used by Mines in Papua …
The gold deposit at Lihir is situa ted within the Luise Calder a, an ex nct volcanic crater that is . ... The disposal of tailings in to the river sy stem has result ed in signi cant .
Heavy metal contamination in the Arieş river catchment, …
The River Arieş catchment is underlain by a varied range of bedrock, including igneous, metamorphic and sedimentary assemblages. The strong igneous element to the bedrock is associated with volcanic activity within the Carpathian region that occurred between 7.4 and 14.7 Ma BP (Alderton and Fallick, 2000).Calk-alkaline igneous rocks, particularly porphyritic …
The composition and state of gold tailings
The research suggests that under similar sub-aqueous sedimentation-consolidation conditions, gold tailings of different compositions will be deposited in varying density states, but with the...
Current situation and prospects for the clean utilization of …
This paper describes the mineralogical properties of gold tailings, including chemical composition, phase composition, particle size distribution, and microstructure; …
Gold Mining and Submarine Tailings Disposal: Review and …
Residual cyanide toxicity may limit colonization of freshly deposited gold mine tailings on the seabed, but the duration and severity of this impact are unknown. ... intermediate in Buyat Bay (the STD site), and lowest in Bajo, a reference site with a river draining a mapped but unexploited gold deposit in volcanic rocks (Lasut et al., 2010 ...
Quartz-Pebble-Conglomerate Gold Deposits
the gold. Deposits that formed prior to the Great Oxidation Event (circa 2.4 giga-annum [Ga]) contain pyrite, whereas younger deposits contain iron oxides. Uranium minerals and hydrocarbons are also notable features of some deposits. Much of the gold in these types of deposits forms crystalline features that are the product of local remobiliza ...
The composition and state of gold tailings
Individual layers of deposited tailings are composed of mixtures of tailings sand (particles larger than 63 m) and tailings slimes (particles smaller than 63 m).
Heavy Metal Pollution from Gold Mines: Environmental …
The sulphidic nature of many gold deposits hinder accessibility of lixiviants but activity of several acidophilic, chemolithotrophic iron and sulphur oxidizing bacteria has been reported to assist in the oxidation of the sulphide matrix. ... The chemical and physical nature of tailings particles can be likened to typical river sand and silt and ...
Gold Placer Deposits
Streambed placers are the most important kind of deposit for the small-scale operator, but the gravel terraces and benches above the streams and the ancient river channels (often …
Long Term Performance of Hydrogeochemical Riverine Mine Tailings …
Steep terrain, intense rainfall, and seismic activity precluded use of conventional tailings storage facilities at the PT Freeport Indonesia (PTFI) copper–gold mine, in Papua, Indonesia. A controlled river tailings system was adopted as the only feasible way to manage the tailings. The tailings are transported to an engineered 230 km2 deposition area, which is …
» Prospecting for Gold in Hard-packed Streambeds
These gold deposits are being laid down even as the (much-lighter) rocks and gravel are still being washed down river with the storm flows. Streambeds form later in the storm, when the water-turbulence tapers off enough to allow the …
Historic Gold Mine Tailings | Contaminated Sites
Tailings are a by-product of a gold mining process that was common in the late 1800s and early 1900s. Rocks that contained both gold and arsenic were crushed and then spread over liquid mercury to remove the gold. The mercury was then evaporated, leaving the gold. The remaining sand-like substance is known as tailings. They include arsenic and ...
The Science Behind Gold Deposits: How River Basins Became …
In the Klondike, gold was found in placer deposits formed as rivers carried gold from eroded stones. The harsh climate and remote location made mining challenging, but the rich deposits …
Mercury Contamination from New World Gold and …
Tailings deposited over 100 years ago and containing ... (Prokopovich 1984), the Lerderberg River gold fields, Australia (Bycroft et al. 1982), and Nova Scotia, Canada (Lane et al. 1988).
Mineralogy and Primary Sources of Gold in the Davenda
Sampling occurred at sites most likely to yield gold. In the tailings of alluvial deposits, these include hollows, dry beds of seasonal streams, bankside spits, deposits with …
(PDF) Riverine Disposal of Mining Wastes in Porgera: …
of large-scale mining—the alluvial gold whose deposits came to be called 'second gardens ' by most P orgerans. ese deposits were discovered in 1939 and began to be worked in the late
Feather River Gold Prospecting
The dredge tailings along the Feather River still hold some large gold nuggets that were discharged by those old dredges. Many prospectors are having great success finding some very nice nuggets using metal detectors. The Feather River drainage is one of the richest and most productive areas in California.